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page 1 of 25 AN44168A product standards driver ic for si ngle phase brushless motor features ? supply voltage range: 5.0 v ~ 28 v ? auto phase shift correction with built-in soft switching function ? wide range operation (12v/24v) ? motor lock protection and built-in auto-recovery fixed with built-in clock ? output pin for fg pulse (open drain) ? various protection functions: under voltage lock out (uvlo), thermal protection gnd short protection, and over current protection ? package 8pin(0.65mm pitch ) description ? AN44168A is a high efficiency single phase motor driver ic with built-in soft switching function for low noise operation. the soft switching period is automatically adjusted based on the motor current. this eliminates the need for individual adjustment of the soft switching period based on the motors specifications. ? with a wide input voltage range of 12v/24v, this ic is most suitable for usage in oa and fa equipment. ? fan motor applications typical application notes: the application circuit is an example. the operation of the mass production set is not guarant eed. sufficient evaluation and verification is required in the design of the mass production set. the customer is fully responsible for the incorpor ation of the above illustrated application circuit in the design of the equipment. out1 out2 [v] time [s] 2ms/div fg iout hphn out1 out2 vcc gnd c vcc hb fg hall element r h c h zener diode condition: v cc = 12 v, pwmi = 100% duty , cvcc = 1 ? f typical characteristics doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 2 of 25 AN44168A product standards features .................................................................................................. .............. 1 description ................................................................................................. .......... 1 applications ................................................................................................. ........ 1 typical application ........................................................................................... 1 typical characteristics ................................................................................. 1 contents ................................................................................................ ................ 2 absolute maximum ratings ............................................................................ 3 power dissipation rating ............................................................................... 3 recommended operating conditions ........................................................ 4 electrical characteristics ......................................................................... 5 pin functions ................................................................................................ ........ 6 pin configuration .............................................................................................. 6 functional block diagram ............................................................................ 7 operation / protection function ....................................................................... 8 operation / drive state diagram ....................................................................... 9 operation / functional explanation .................................................................... 10 pin equivalent circuit .................................................................................... 16 application information ................................................................................ 18 package information ....................................................................................... 21 important notice ............................................................................... ................. 24 contents doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 3 of 25 AN44168A product standards parameter symbol rating unit notes supply voltage v cc C0.3 to +35 v *1 operating ambient temperature t opr C40 to +90 ? c *2 junction temperature t j C40 to +150 ? c *2 storage temperature t stg C55 to +150 ? c *2 input voltage range v hp, v hn C0.3to+6 v output voltage range v out1, v out2 C0.3 to +35 v *1*3 v fg C0.3 to +35 v v hb C0.3to+6 v *3 output current range i out1, i out2 C1000 to +1000 ma *1*4 i fg C5 to +10 ma i hb C10 to 0 ma *4 esd hbm 2 kv mm 200 v package ? j-a p d (t a =25 ? c) p d (t a =90 ? c) msop 8 pin plastic package (0.65mm pitch) 222.2 ? c/w 562.6mw 270.0mw *1: glass-epoxy substrate (1 layers) [70 ? 70 ? 1.6 t](mm) notes: this product may sustain permanent damage if subjected to cond itions higher than the above stated absolute maximum ratin g. this rating is the maximum rating and device operating at th is range is not guaranteed as it is higher than our stated recommended operating range. when subjected under the absolute maximum rating for a long time, the reliability of the product may be affected. *1: the values under the condition not exceeding the above absolute maximum ratings and the power dissipation. *2: except for the power dissipation, oper ating ambient temperature, and storage temperature, all ratings are for ta = 25 ? . *3: applying external voltage into these pins is prohibited. do not exceed the stated ratings even in transient state. *4: applying external current into these pins is prohibit ed. do not exceed the stated ratings even in transient state. notes: for the actual usage, please refer to the p d -t a characteristics diagram in the package speci fication, follow the power supply voltage, load and ambient temperature conditions to ensure that there is enough margin and the thermal design does not exceed the allowable value. absolute maximum ratings caution although this ic has built -in esd protection circuit, it may st ill sustain permanent damage if not handled properly. therefore, proper esd precautions are recommended to avoid electrostatic damage to the mos gates. power dissipation rating doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 4 of 25 AN44168A product standards parameter symbol min. typ. max. unit notes supply voltage range v cc 5.0 28 v *1 input voltage range v hp 01 . 5v * 2 v hn 01 . 5v * 2 external constants c vcc 1 ? f *3 notes: *1: it is a value under the conditions which do not exceed the absolute maximum rating and the power dissipation. *2: for setting range of input control voltage, refer to electrical characteristics and operation. *3: operation of mass production set is not guaranteed. perform enough evaluation and verification on the design of mass production set. if the vcc terminal voltage is raised by the regener ative current, at the time of start-up or stop operating please connect a zener diode between vcc C gnd terminal. recommended operating conditions doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 5 of 25 AN44168A product standards electrical characteristics v cc = 12.0 v note: t a = 25 ? c ? 2 ? c unless otherwise noted. parameter symbol condition limits unit note min typ max circuit current v cc current 1 i cc1 output open, lock state 1.5 3 ma v cc current 2 i cc2 output open, 50% duty 2.0 4 ma fg block low-level output voltage v olfg i o = 5 ma 0.1 0.3 v output leak current i lfg vo=28v 30 ? a power block on resistance (high side + low side) r onhl i = 200 ma 1.6 2.25 ? diode forward voltage v di i = 200 ma 0.6 0.8 1 v hall block input dynamic range v ha 0 1.5 v pin input current i ha C 2 0 2 ? a minimum input voltage amplitude v ha 2 5 mv hysteresis width v hhys 1 0 20 mv hall bias output voltage v hb io = C2ma 1.05 1.2 1.35 v motor lock protection lock protection time setting for reference clock frequency f lock 7.4 10.6 13.8 khz lock detection time t lock1 0.5 s* 2 lock release time t lock2 5 s* 2 lock protection ratio pr ratio 1 0 * 2 thermal protection protection operating temperature tsd on 160 ? c *2 hysteresis width tsd hys 2 5 ? c *2 under voltage lock out protection operating voltage v lvon 3 . 5 v * 2 hysteresis width v lvohys 0 . 2 v * 2 notes: *1 these are values checked by design but not production tested. *2 typical design value. doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 6 of 25 AN44168A product standards pin no. pin name type description hp input hall amplifier input (+) hb output hall bias output hn input hall amplifier input (C) out1 output channel 1 output gnd ground ground out2 output channel 2 output vcc power supply voltage for internal circuit fg output fg external output pin configuration pin functions hp hb hn out1 fg vcc out2 gnd 1 23 4 8 76 5 doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 7 of 25 AN44168A product standards block diagram hall + - vcc gnd out2 out1 pre drv pre drv hcomp osc pwm soft switch control motor lock control fg control auto adjustment protection control +- lvd controllogic hn hp hb hb vref vcc +- fg +- tsd vref sensor vref current sensor current limiter short protection vreg vref doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 8 of 25 AN44168A product standards function name operate release note tsd 160 ? 135 ? low side power-transistor are off while protection function works. current limit 1.2a after fixed time progress if motor current reaches 1.2a, output current will be restricted in turning off an output for a fixed time. on time , and off time are such as below. (on : 2sec, off : 10.0sec) uvlo (vcc) 3.5v 3.7v it is protection of the low-voltage condition of the power supply voltage. if protected operation is carried out, high side output are switching according hall input, and low side output power is turned off. motor locked protection when fg pulse does not change within a set time. (latch protection) ~ at uvlo ~ after fixed time progress uvlo release protection and a count are reset. a protection setting time is determined by internal circuit. (time(s) = 0.5 sec) restart after 5 sec. short protection of motor output - vcc current limiting after fixed time progress protection by output current limiting short protection of motor output - gnd latch protection by constant time detection. ~ at uvlo latch protection is carried out. release is performed by uvlo . operation protection function note : these are values checked by design but not production tested. note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 9 of 25 AN44168A product standards operation (continued) drive state diagram hall hp hn fg out1 voltage out2 voltage high side on high side on out1 current 22.5deg 22.5deg note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 10 of 25 AN44168A product standards operation (continued) functional explanation start up ~~~~~~~ after applying the vcc of power supply within the operation limits, ic becomes start mode as normal startup mode, when you open the pwmi terminal, in startup, it will start on the pwm oper ation at a fixed dut y (duty=50%, f=40khz). after hall input is switched two periods, it becomes normal driving of duty = 100%. soft switching ~~~ hall comparator detects t he switching of the hall, out1 and out2 operates soft switching in the phase angle period of 22.5 degree. and this function make the fluctuat ion of the driving current smoothly. 1. start up note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. out2 out1 vcc fg hb 2msec out2 out1 vcc fg hb 2msec 2 start up with hp ? hn 3 2 start up with hp ? hn 3 duty=50% without soft-switching duty=100%, with soft-switching it starts without software sw, fixed duty=50%. by detecting the hall two periods, operates to set duty=100% & software switching duty=50% without soft-switching duty=100%, with soft-switching doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 11 of 25 AN44168A product standards 2. motor locked protection circuit when fg non-signal state continues for a certain period of time in the motor normal operation mode, locked protection circuit operates. in the locked protection mode, lo w side power outputs are off state. the value of the locked protection time can be calculated by the following equation approximately. restricted protection setting time (sec) 0.5 sec make setting with a margin for motor start-up time. conditions to release the motor restricted protection, and to reset the counter are as follows. ~ in detecting uvlo mode ~ after fixed time progress ( about 5 sec ) fg output fg pulse output restricted protection count restricted protection mode state timer count restricted protection detection motor re-drive motor output stop, restricted protection count normal drive restricted protection mode, low side output: off fg pulse output suspend motor restriction normal drive restricted protection release ~ restricted protection explanation passage of time that is set in the capacitance value of cldosc note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. operation (continued) functional explanation (continued) doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 12 of 25 AN44168A product standards 3. low voltage protection this ic monitors the voltage vcc. if vcc voltage becomes 3.5v or less, low-voltage protection is activated. in the low voltage protection operation, the output of each phase is high side on, low side off. in addition, if the vcc voltage drops further, the internal ci rcuit is no longer working properly, the outputs, all phases are hiz (all phases off). hysteresis of 0.2v is set in the vcc low voltage protection function. if the vcc is restored to 3.7v from protection mode, the low voltage protection is released. if an ic junction temperature is 160 ? (design target value) or more, the thermal protection is activated, and the motor outputs becomes low side off . if the ic junction temperature is 135 ? (design target value) or less, the protection is released. 4. thermal protection (tsd) state normal drive hiz output normal drive vcc 3.7 v3.5 v ulvo internal circuit inoperative voltage uvlo low side off ulvo temp 160 ? c tsd 135 ? c state normal drive low side off normal drive uvlo low side off note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. operation (continued) functional explanation (continued) doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 13 of 25 AN44168A product standards 5. overcurrent protection overcurrent protection detection out1 (out2) overcurrent setting here, describes the overcurrent protection. it detects an overcurrent at 1.2a, as overcurrent does not flow at out1, out2 after detecting a current greater than the setting value, by shutting off the output transistor during the predetermined time, it protects an over-current. on time 2 sec (in start up period 1.5sec) off time 10 sec (in st art up period 40sec) on off on off on time off time motor current note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. operation (continued) functional explanation (continued) doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 14 of 25 AN44168A product standards 6. hall input the following is a schematic diagram of the characteristics. j-1 hysteresis level: 5 mv l h j-2 hysteresis level: 5 mv h l j-3 hysteresis width: 10 mv (typ) hall voltage difference hp hn hall comparator output j-1 0 j-2 t [time] j-3 hphn hall hysteresis comparator carries out position detection. if the amplitude of the sine wave is small, the phase delay of the comparator output becomes si gnificant, therefore, increase the amplitude. recommendation is 200 mv or more. also, if the hole chattering occurs, put capacitor between hp (1 pin) and hn (3 pin). fg pulse for hall 1 cycle hall voltage difference hp hn ~ relationship between hall voltage and fg for the one cycle sine wave of ha ll, it outputs fg pulse one cycle. note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. operation (continued) functional explanation (continued) doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 15 of 25 AN44168A product standards 7. fg pin fg pin outputs a switching of hall signal. since it is an open-drain output, please connect a pull-up resistor to the power supply, when you use this function. fg outputs high, when hp voltage > hn voltage. 8. hb pin hb pin is a terminal for supplying the bias voltage to the hall element . 1.2v is outputted from hb terminal. if it is necessary to take countermeasures to prevent the noise, please add the hall capacitance between hb terminal and gnd terminal. the maximum value of the hall capacitance is 0.1 ? f. it has the effect of suppressing the heat generation of the ic by adding a series resistor to the hall element. however, hall amplitude should be setting the resistance constant perform sufficient evaluation because it becomes smaller in proportion. note) the characteristics listed below are reference values derived from design of the ic and are not guaranteed. operation (continued) functional explanation (continued) doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 16 of 25 AN44168A product standards pin no. internal circuit impedance description 1, 3 pin1(hp) :hall amplifier + input pin pin3(hn) :hall amplifier C input pin 2 120k ? pin2(hb) :hall bias 1.2v output pin pin equivalent circuit note: the characteristics listed below are reference values derived from the design of the ic and are not guaranteed. 3 1 40k ? 40k ? 20k ? 100k ? internal voltage vcc 2 1v doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 17 of 25 AN44168A product standards note: the characteristics listed below are reference values derived from the design of the ic and are not guaranteed. pin equivalent circuit (continued) pin no. internal circuit impedance description 4, 6 pin4(out1), pin6(out2) :motor drive output pin 5 pin5 gnd :gnd pin 7 pin7 vcc :power supply pin 8 pin8(fg) :fg signal output pin vcc 6 10 internal voltage internal voltage 5 gnd 7 vcc 1k ? 8 internal voltage doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 18 of 25 AN44168A product standards when ic turns on, the duty of pwm pulse is forced 50% without auto phase shift and soft switch until second fg pulse. so, in case of restarting under condition which motor is decelerating. because the possibility which the motor current is switched before the motor current bec omes to zero is high, the motor current flows into vcc. so vcc rises higher than setting voltage, there is possibility that vcc voltage is over ics absolute maximum voltage, if this situation happens, ic shifts to a latch stop mode and destroys at worst. please countermeasure to cramp vcc voltage by adding the zener diode in parallel with bypass capacitance and ensure sufficient evaluation is performed to verify that there is no problem. 1.precaution at restarting under decelerating. m 1 ? f ic when the power supply voltage is turned off under high speed rotation. because the motor's bemf voltage is high, vcc is supplied by bemf voltage, and ic repeats start and stop. the possibility which the motor current flows into vcc is high, vcc rises higher t han setting voltage, there is possibility that vcc voltage is ov er ics absolute maximum voltage. please countermeasure to cramp vcc voltage by adding the zener diode in parallel with bypass capacitance and ensure sufficient evaluation is performed to verify that there is no problem. 2.precaution at turn off vcc if the above 1 or 2 occurs and the countermeasure is needed, please countermeasure to cramp vcc voltage by adding the zener diode in parallel with bypass capacitance and ensure sufficient evaluation is performed to verify that there is no problem. application information (countermeasure circuit) power supply unit add the zener diode in parallel with bypass capacitance doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 19 of 25 AN44168A product standards m m ic ic 1ohm 1 ? f 1 ? f when vcc and gnd wire is long, there is possibility whic h current peak of motor i nput current is caused at pwm motion due to wires parasitic inductance. please countermeasure to reduce current peak of motor input current by adding a resistance in series with bypass capacitance and ensure sufficient evaluation is performed to verify that there is no problem. 3.precaution at pwm motion application information (continued) (circuit) (countermeasure circuit) power supply unit power supply unit wires parasitic inductance. wires parasitic inductance. input current input current the current peak is reduces according to adding in series with bypass capacitance. the current peak is caused at pwm motion due to the wires para sitic inductance. doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 20 of 25 AN44168A product standards 1 ? f ic vcc 1 ? f ic 1ohm vcc when input power to vcc, it is recommended that vcc voltage rises slower than 0.24v/us. when power up is performed at high-speed, rush current must flow into bypass capacitance between vcc and gnd. so vcc rises higher than setting voltage due to wires parasitic inductance, there is possibility that vcc voltage is over ics absolute maximum voltage. please countermeasure to reduce rush current by adding a resistance in series with bypass capacitance and ensure sufficient evaluation is performed to verify that there is no problem. 4.precaution at inputting power to vcc (circuit) (countermeasure circuit) power supply unit there is possibility that vcc voltage is over ics absolute maximum voltage. setting voltage power on by mechanical switch the rush current of the bypass capacitance is big power supply unit power on by mechanical switch the rush current is reduces according to adding a resistance in series with bypass capacitance. setting voltage application information (continued) vcc voltage is stable by adding a resistance in series with bypass capacitance for example, in case of turning on the vcc by using the mechanical switch. doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 21 of 25 AN44168A product standards package code : msop008-p-0150xzl (msop8) outline drawing 6oju mm package information lead finish method : sn plating lead material : cu alloy body material : br/sb free epoxy resin doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 22 of 25 AN44168A product standards package code: msop008-p-0150xzl (msop8) package information (continued) power dissipation (technical report) 0.5626 mount on fr4 pcb(1layer) without thermal via | 70x70x1.6t(mm) rth(j-a) = 222.2oc/w 0.2845 without pcb rth(j-a) = 439.4 oc/w doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 23 of 25 AN44168A product standards indication total layer resin material phenolic cellulose paper 1-layer fr-1 glass-epoxy 1-layer fr-4 glass-epoxy 2layer 2-layer fr-4 package information (continued) power dissipation (supplementary explanation) [supplementary informa tion of pwb to be u sed for measurement] the supplement of pwb information for power dissipation data (technical report are shown below. [experiment environment] power dissipation technical report is a result in the experiment environment of semi standard conformity. ambient air temperature (ta) is 25 degrees c package semiconductor element rth(j-c) rth(c-a) rth(j-a) tatc tj pwb [definition of each temperature and thermal resistance] ta ambient air temperature t air temperature is defined as temperature separated from the heating elements and not affected by convection, radiation, etc. tc temperature near the center of a package surface. opposite side of the package mounting surface. tj semiconductor element surface temperature (junction temperature.) rth(j-c) thermal resistance (temperature difference per 1 watts) between the semiconductor element junction part and the package surface. rth(c-a) thermal resistance (temperature difference per 1 watts) between the package surface and ambient air temperature. rth(j-a) thermal resistance (temperature difference per 1 watts) between a semiconductor element junction part and ambient air temperature. [notes about power dissipation (thermal resistance) ] power dissipation value (thermal resistance) depend on the conditions of the surroundings, such as specification of pwb, m ounting conditi on and ambient temperature. (power dissipation (thermal resistance) is not a fixed value.) the power dissipation value (technical report) is the result based on evaluation under specified conditions (evaluation environment under semi international standar ds). power dissipation value (thermal resistance) depends and changes with the environmental conditions. [definition formula] rth(j-c) = tj-tc p rth(c-a) = tc-ta p rth(j-a) = tj-ta p ( ? /w) ( ? /w) ( ? /w) tj={rth(j-c)+rth(c-a)} p+ta =rth(j-a) p+ta p:power(w) fig1. definition image = rth(j-c) rth(c-a) doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 24 of 25 AN44168A product standards 1. when using the ic for new models, verify the safety including the long-term reliability for each product. 2. when the application system is designed by using this ic, please confirm the notes in this book. please read the notes to descriptions and the usage notes in the book. 3. this ic is intended to be used for general electronic equipment. consult our sales staff in advance for information on the following applications: special applications in which exceptional quality and reliab ility are required, or if the failure or malfunction of this ic may directly jeopardize life or h arm the human body. any applications other than t he standard applications intended. (1) space appliance (s uch as artificial satellite, and rocket) (2) traffic control equipment (such as for automotive, airplane, train, and ship) (3) medical equipment for life support (4) submarine transponder (5) control equipment for power plant (6) disaster prevention and security device (7) weapon (8) others : applications of which reliability equivalent to (1) to (7) is required our company shall not be held responsible for any damage incurred as a result of or in conne ction with the ic being used for any special application, unless our company agrees to the use of such special application. however, for the ic which we designate as products for automotive use, it is possible to be used for automotive. 4. this ic is neither designed nor intended for use in automotiv e applications or environments unless the ic is designated by ou r company to be used in automotive applications. our company shall not be held responsible for any damage incurred by customers or any third party as a result of or in connection with the ic being used in automotive application, unless our company agrees to such application in this book. 5. please use this ic in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the eu rohs directive. our company shall not be held responsible for any damage incurred as a result of our ic being used by our customers, not complying with the applicable laws and regulations. 6. pay attention to the direction of the ic. when mounting it in the wrong direction onto the pcb (printed-circuit-board), it might be damaged. 7. pay attention in the pcb (printed-circuit-board) pattern layout in order to prevent damage due to short circuit between pi ns. in addition, refer to the pin description for the pin configuration. 8. perform visual inspection on the pcb before applying power, otherwise damage might happen due to problems such as solder-bridge between the pins of the ic. also, perform full tec hnical verification on the assembly quality, because the same damage possibly can happen due to conductive substances, such as solder ball, that adhere to the ic during transportation. 9. take notice in the use of this ic that it might be damaged when an abnormal state occurs such as output pin-vcc short (power supply fault), output pin-gnd short (ground fault), or output -to-output-pin short (load short). safety measures such as installation of fuses are recommended because the ext ent of the above-mentioned damage will depen d on the current capability of the power supply. although the following pins comes with short circuit prot ection function, the protection may be damaged depending on the vcc voltage. pins with short circuit protection function: out1 and out2. 10. the protection circuit is for maintaining safety against abnormal operation. when sudden voltage or current change is applied to the pin, it may exceed the designated voltage and current level and therefore, customer shall perform sufficient evaluation and verification to ensure these are not exceeded in the usage. especially for the thermal protection circuit, if the area of safe operation or the absolute maximum rating is momentarily exceeded due to output pin to vcc short (power supply fault), or output pin to gnd short (ground fault), the ic might be damaged before the thermal protection circuit could operate. 11. unless specified in the product specifications, make sure that negative voltage or excessive voltage are not applied to the pins because the ic might be damaged, which could happen due to negative voltage or excessive voltage generated during the on and off timing when the inductive load of a motor co il or actuator coils of optical pick-up is being driven. 12. product which has specified aso (area of safe operation) should be operated in aso 13. verify the risks which might be caused by the malfunctions of external components. important notice doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
page 25 of 25 AN44168A product standards important notice (continued) 14. comply with the instructions for us e in order to prevent breakdown and chara cteristics change due to external factors (esd, eos, thermal stress and mechanical stress) at the time of handling, mounting or at customers process. 15. dip soldering is not recommended. 16. follow the power supply voltage, load and ambient temperature conditions to ensure that there is enough margin and the thermal design does not exceed the allowable value. 17. when designing your equipment, comply with the range of absolute maximum rating and the guaranteed operating conditions (operating power supply voltage and operating environment, etc.). es pecially, please be careful not to exceed the range of absolute maximum rati ng on the transient st ate, such as power-on, power-off and m ode switching. otherwise, we will not be liable for any defect which may arise later in your equipment. even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure mode, possible to occur to semiconductor products. measures on the systems such as redundant design, arresting the spread of fire or preventing glitch are recommended in order to prevent physical injury, fire, social damage, for example, by using the products. doc no. ta4-ea-06296 revision. 2 established : 2015-04-10 revised : 2015-06-02 downloaded from: http:///
request for your special attention and precautions in using the technical information and semiconductors des cribed in this book (1) if any of the products or technical information described in this book is to be exported or provided to non - residents, the laws and regulations of the exporting country, especially, those with regard to security export control, must be observed . (2) the technical information described in this book is intended only to show the main characteristics and application circuit examples of the products . no license is granted in and to any intellectual property right or other right owned by panasonic corporation or any other company . therefore, no responsibility is assumed by our company as to the infringement upon any such right owned by any other company which may arise as a result of the use of technical information de - scribed in this book . (3) the products described in this book are intended to be used for general applications (such as office equipment, communications equipment, measuring instruments and household appliances), or for specific applications as expressly stated in this book . please consult with our sales staff in advance for information on the following applications, moreover please exchange documents separately on terms of use etc .: special applications (such as for in - vehicle equipment, airplanes, aerospace, automotive equipment, traffic signaling equipment, combustion equipment, medical equipment and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body . unless exchanging documents on terms of use etc . in advance, it is to be understood that our company shall not be held responsible for any damage incurred as a result of or in connection with your using the products described in this book for any special application . (4) the products and product specifications described in this book are subject to change without notice for modification and/or improvement . at the final stage of your design, purchasing, or use of the products, therefore, ask for the most up - to - date product standards in advance to make sure that the latest specifications satisfy your requirements . (5) w hen designing your equipment, comply with the range of absolute maximum rating and the guaranteed operating conditions (operating power supply voltage and operating environment etc .). especially, please be careful not to exceed the range of absolute maximum rating on the transient state, such as power - on, power - off and mode - switching . other - wise, we will not be liable for any defect which may arise later in your equipment . even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure mode, possible to occur to semiconductor products . measures on the systems such as redundant design, arresting the spread of fire or preventing glitch are recommended in order to prevent physical injury, fire, social damages, for example, by using the products . (6) comply with the instructions for use in order to prevent breakdown and characteristics change due to external factors (esd, eos, thermal stress and mechanical stress) at the time of handling, mounting or at customer's process . we do not guarantee quality for disassembled products or the product re- mounted after removing from the mounting board . when using products for which damp - proof packing is required, satisfy the conditions, such as shelf life and the elapsed time since first opening the packages . (7) when reselling products described in this book to other companies without our permission and receiving any claim of request from the resale destination, please understand that customers will bear the burden . (8) this book may be not reprinted or reproduced whether wholly or partially, without the prior written permission of our company . no.010618 downloaded from: http:///

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