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| MP3394S step-up, 4-string max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 1 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. the future of analog ic technology description the MP3394S is a step-up controller with 4 current channels. it?s designed to drive wled arrays for large-size lcd-panel backlighting applications. the MP3394S is flexible, and can expand the number of led channels with 1 or 2 MP3394S in parallel operating from a single inductive power source. the MP3394S uses an architecture of current ? mode and fixed operation frequency the frequency is programmable by an external frequency-setting resistor. MP3394S drives an external mosfet to boost up the output voltage from a 5v to 28v input supply. it regulates the current in each led string to the programmed value set by an external current- setting resistor. the MP3394S applies 4 internal current sources for current balance. the current matching can achieve 2.5% regulation accuracy between strings. its low regulation voltage on led current sources reduces power loss and improves efficiency. an external pwm input signal or dc input signal controls pwm dimming. in dc-input dimming mode, the dimming pwm signal can be generated internally and the dimming frequency is programmed by an external setting capacitor. features ? 4-string, max 200ma/string wled driver ? 5v to 28v input voltage range ? 2.5% current matching accuracy between strings ? programmable switching frequency ? pwm or dc input burst pwm dimming ? open and short led protection ? programmable over-voltage protection ? cascading capability with a single power source ? under-voltage lockout ? thermal shutdown ? tssop16ep, soic16 and soic20 packages applications ? desktop lcd flat panel displays ? flat panel video displays ? 2d/3d lcd tvs and monitors all mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithi c power systems, inc. typical application 5 7 3 6 13 12 11 10 9 8 15 16 1 2 14 4 vin enable 5v to 28v c in c vcc c comp r comp r osc r set r sense c out r1 d1 l1 vin vcc comp en osc bosc dbrt iset led4 led3 led2 led1 ovp gnd isense gate MP3394S r2 m1 r bosc c bosc dimming
MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 2 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. ordering information part number package top marking MP3394Sgf * tssop16ep MP3394S MP3394Sgs ** soic16 MP3394S MP3394Sgy *** soic20 MP3394S * for tape & reel, add suffix ?z (eg. MP3394Sgf?z). ** for tape & reel, add suffix ?z (eg. MP3394Sgs?z). *** for tape & reel, add suffix ?z (eg. MP3394Sgy?z). contact factory for tssop16ep availability package reference osc led2 comp led3 en led4 14 13 12 11 exposed pad connect to gnd led1 16 15 7 8 vcc vin dbrt iset gnd bosc g a t e i s e n s e o v p top view 10 9 3 4 5 6 1 2 14 13 12 11 16 15 7 8 top view 10 9 3 4 5 6 1 2 led2 led3 led1 vcc vin g a t e i s e n s e o v p osc comp en led4 dbrt iset gnd bosc 18 17 16 15 20 19 7 8 top view 14 13 3 4 5 6 1 2 ovp led1 nc vcc vin g a t e i s e n s e n c gnd comp en iset dbrt nc nc osc 9 10 led4 bosc 12 11 led2 led3 tssop16ep soic16 soic20 absolute maxi mum ratings (1) vin ................................................-0.3v to +30v v gate ............................................-0.5v to +6.8v vcc .............................................-0.5v to +6.8v v led1 to v led4 ....................................-1v to +55v all other pins ...............................-0.3v to +6.3v continuous power dissipation (t a = 25c) (2) tssop16ep ........................................... 2.78 w soic16 ................................................... 1.56 w soic20 ??????????????1.74w junction temperature ...............................150c lead temperature ....................................260c storage temperature.............. -65 c to +150c recommended operating conditions (3) supply voltage vin.............................5v to 28v led current (backlight) ...........10ma to 180ma operating junction temp. (t j ). -40c to +125c thermal resistance (4) ja jc tssop16ep ...........................45 ...... 10 ... c/w soic16 ...................................80 ...... 35 ... c/w soic20 ...................................72 ...... 30 ... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable powe r dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guaranteed to function outside of its operation conditions. 4) measured on jesd51-7, 4-layer pcb. MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 3 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics v in =12v, v en = 5v, t a = 25c, unless otherwise noted. parameters symbol condition min typ max units operating input voltage v in 5 28 v supply current (quiescent) i q v in =12v, v en =5v, no load with switching 4 ma supply current (shutdown) i st v en =0v, v in =12v 2 a ldo output voltage v cc v en =5v, 7v MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 5 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics v in = 12v, 10leds in series 4 strings, 120ma/string, unless otherwise noted. v sw 20v/div. v out 20v/div. v in 10v/div. v in 10v/div. i inductor 1a/div. steady state v sw 20v/div. v out 20v/div. i led 500ma/div. v in power on v sw 20v/div. v out 20v/div. i led 500ma/div. v en 5a/div. en power on v sw 20v/div. v out 20v/div. v bosc 1v/div. i led 500ma/div. v sw 20v/div. v out 20v/div. v pwmi 5v/div. i led 500ma/div. v sw 20v/div. v out 20v/div. i led 500ma/div. open led protection open all led string at working v sw 20v/div. v out 20v/div. i led 500ma/div. open led protection open one led string at working v sw 20v/div. v out 20v/div. v led1 20v/div. i led 500ma/div. short led protection short v out to ledx at working efficiency vs. v in 50 55 60 65 70 75 80 85 90 95 100 51015202530 MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 6 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions tssop16ep &soic16 pin # soic20 pin # name description 1 1 comp step-up converter compensation pin. this pin compensates the regulation control loop. connect a ceramic capacitor from comp to gnd. 2 2 en enable control input. a voltage greater t han 1.8v will turn the part on and less than 0.6 v will turn the part off. do not let this pin float. 3 3 dbrt brightness control input. apply a pwm signal on this pin for for external pwm dimming mode. apply a dc voltage range from 0.2v to 1.2v on this pin to linearly set the internal dimming duty cycle from 0% to 100% for dc- input pwm dimming mode. the MP3394S has positive dimming polarity on dbrt. 4 5 gnd ground. 5 7 osc switching frequency set. connect a resistor between osc and gnd to set the step-up converter?s switching freq uency. the voltage at this pin is regulated to 1.22v. the clock frequency is proportional to the current sourced from this pin. 6 8 iset led current set. tie a current-setting resistor from this pin to ground to program the current in each led string. this pin voltage is regulated to 1.22v. the led current is proportiona l to the current through the iset resistor. 7 9 bosc dimming repetition set. this is the ti ming pin for the oscillator to set the dimming frequency. to use dc input pwm dimming mode, connect a capacitor from this pin to gnd to set the internal dimming frequency. a saw-tooth waveform is generated on this pin. to use external pwm dimming mode, connect a resistor from this pin to gnd, and apply the pwm signal on dbrt pin. 8 10 led4 led string 4 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 4 cathode to this pin. 9 11 led3 led string 3 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 3 cathode to this pin. 10 12 led2 led string 2 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 2 cathode to this pin. 11 13 led1 led string 1 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 1 cathode to this pin. 12 14 ovp over-voltage protection input. connect a resistor divider from output to this pin to program the ovp threshold. when this pin voltage reaches 1.23v, the MP3394S triggers over voltage protection mode. 13 17 isense current sense input. during normal operation, this pin senses the voltage across the external-inductor current-sensing resistor (r sense ) for peak- current?mode control and also to limit the inductor current during every switching cycle. if this pin is not us ed for cascading applications, tie this pin to gnd; do not let this pin float. 14 18 gate step-up converter power switch?s gate driver output. this pin drives the external power n-mos device. MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 7 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions (continued) tssop16ep &soic16 pin # soic20 pin # name description 15 19 vin supply input. vin supplies the power to the chip, as well as the step- up converter switch. drive vin with a 5v to 28v power source. must be locally bypassed. 16 20 vcc the internal 5.8v linear regulator output. vcc provides power supply for the external- mosfet switch-gate driver and the internal control circuitry. bypass vcc to gnd with a ceramic capacitor. 4, 6, 15, 16 nc no connect. MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 8 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. functional block diagram figure 1?MP3394S functional block diagram MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 9 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. operation employing the peak-current mode and a programmable constant frequency, the MP3394S is a step-up led driver with 4 channels or regulated current sources to drive an array of up to 4 strings of white leds. internal regulator the MP3394S includes an internal linear regulator (vcc). when vin is greater than 6v, this regulator outputs a 5.8v power supply to the external mosfet switch?s gate driver and the internal control circuitry. the vcc voltage drops to 0v when the chip shuts down. the MP3394S features under-voltage lockout (uvlo). the chip is disabled until vcc exceeds the uvlo threshold. the uvlo hysteresis is approximately 200mv. system startup when enabled, the MP3394S checks the topology connection first. the chip monitors the over-voltage protection (ovp) pin to see if the schottky diode is connected or if the boost output is shorted to gnd. an ovp voltage of less than 75mv will disable the chip. the MP3394S also checks other safety limits, including uvlo and over-temperature protection (otp) after passing the ovp test. if all the protection tests pass, the chip then starts boosting the step-up converter with an internal soft-start. it is recommended that the enable signal is given after the establishment of the input voltage and pwm dimming signal during the start-up sequence. step-up converter the converter?s operating frequency is programmable (from 100khz to 500khz) with an external set resistor on the osc pin. this flexibility helps to optimize the size of external components and improve the efficiency. at the beginning of each cycle, the internal clock output a signal to turn on the external mosfet (minimum turn on time is 100ns). a stabilizing ramp added to the output of the current sense amplifier prevents sub-har monic oscillations for duty cycles greater than 50 percent. this result is fed into the pwm comparator. when this resulting voltage reaches the output voltage of the error amplifier (v comp ), the external mosfet turns off. the output voltage of the internal error amplifier is an amplified signal of the difference between the reference voltage and the feedback voltage. the converter automatically chooses the lowest active ledx pin voltage to provide a high- enough bus voltage to power all the led arrays. if the feedback voltage drops below the reference, the output of the error amplifier increases. this result in more current flowing through the mosfet, thus increasing the power delivered to the output. this forms a closed loop that regulates the output voltage. under light-load operation?where v out vin? ,the converter runs in pulse-skipping mode where the mosfet turns on for a minimum on-time of approximately 100ns, and then the converter discharges the power to the output for the remaining period. the external mosfet remains off until the output voltage needs to be boosted again. dimming control the MP3394S provides two pwm dimming methods: external pwm signal or dc-input pwm dimming mode (see figure 2). + - dpwm oscillator dpwm comparator dbrt bosc ex-pwm input c bosc dpwm output figure 2?pwm dimming method MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 10 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. for external pwm dimming, ground the bosc pin through a resistor, and apply an external pwm signal to the dbrt pin. for dc-input pwm dimming, apply a dc analog signal to the dbrt pin, and connect a capacitor on bosc pin to ground. the dc signal is then converted to a dpwm dimming signal with a proportional oscillation frequency. the brightness of the led array is proportional to the duty cycle of the dpwm signal. the dpwm signal frequency is set by the capacitor from the bosc pin to ground. open string protection open string protection is achieved through the ovp pin and the led (1 to 4) pins. if one or more strings are open, the respective ledx pins are pulled to ground and the ic keeps charging the output voltage until it reaches the over-voltage protection (ovp) threshold. then the chip marks off the strings which have an ledx pin voltage lower than 196mv. once marked, the remaining led strings force the output voltage back into tight regulation. the string with the largest voltage drop determines the output regulation. the MP3394S will always attempt to light at least one string. if all strings are open, the MP3394S shuts down the step-up converter. the strings will remain in this marked state until the chip reset. short string protection the MP3394S monitors the ledx pin voltages to determine if a short string fault has occurred. if one or more strings are shorted, the respective ledx pins tolerate high voltage stress. if an ledx pin voltage is higher than 6.1v, this condition triggers the detection of a short string. when a short string faults (ledx over-voltage fault) keeps for 4096 switching clocks, the fault string is marked off and disabled. once a string is marked off, it disconnects from the output voltage loop. the marked led strings shut off completely until the part restarts. if all strings are shorted, the MP3394S will shut down the step-up converter. the strings remain marked off until the chip resets. thermal shut down protection when MP3394S die temperature exceeds the thermal protection threshold, the thermal protection is triggered. ic shuts down until en restart. MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 11 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. application information selecting the switching frequency the switching frequency of the step-up converter is recommended from 100khz to 500khz for most of application. an oscillator resistor on osc pin sets the internal oscillator frequency for the step-up converter according to the equation: sw osc 69190 f(khz) r(k) = for r osc =374k ? , the switching frequency is set to 185 khz. setting the led current the led string currents are identical and set through the current setting resistor on the iset pin. the iset pin can not be open. led set 800 1.22v i(ma) (r 0.5)k = + selecting the input capacitor the input capacitor reduces the surge current drawn from the input supply and the switching noise from the device. the input capacitor impedance at the switching frequency should be less than the input source impedance to prevent the high-frequency switching current from passing through to the input. use ceramic capacitors with x5r or x7r dielectrics for their low esr and small temperature coefficients. for most applications, use a 4.7 f ceramic capacitor in parallel with a 220f electrolytic capacitor. selecting the inductor and current sensing resistor the MP3394S requires an inductor to supply a higher output voltage while being driven by the input voltage. a larger value inductor results in less ripple current, resulting in lower peak inductor current and reducing stress on the internal n-channel mosfet. however, the larger value inductor has a larger physical size, higher series resistance, and lower saturation current. choose an inductor that does not saturate under the worst-case load conditions. select the minimum inductor value to ensure that the boost converter works in continuous conduction mode with high efficiency and good emi performance. calculate the required inductance value using the equation: 2 out sw load v d ( 1d ) l 2 f i ? out in v v 1 d ? = where v in and v out are the input and output voltages, f sw is the switching frequency, i load is the led load current, and is the efficiency. the switching current is usually used for the peak current mode control. in order to avoid hitting the current limit, the voltage across the sensing resistor r sense must measure less than 80% of the worst-case current-limit voltage, v sense . sense sense l(peak) 0.8 v r i = out load in out in l(peak) in sw out vi v(v-v) i v 2lfv =+ where i l(peak) is the peak value of the inductor current. v sense is shown in figure 3. current limit-vsense (mv) duty cycle (%) vsense vs. duty cycle 0 100 200 300 400 500 0 102030405060708090100 figure 3?v sense vs duty cycle selecting the power mosfet the MP3394S is capable of driving a wide variety of n-channel power mosfets. the critical parameters of selection of a mosfet are: 1. maximum drain-to-source voltage, v ds(max) 2. maximum current, i d(max) 3. on-resistance, r ds(on) MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 12 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. 4. gate source charge q gs and gate drain charge q gd 5. total gate charge, q g ideally, the off-state voltage across the mosfet is equal to the output voltage. considering the voltage spike when it turns off, v ds(max) should be greater than 1.5 times of the output voltage. the maximum current through the power mosfet occurs at the maximum input voltage and the maximum output power. the maximum rms current through the mosfet is given by rms(max) in(max) max iid = , where: out in(min) max out vv d v ? the current rating of the mosfet should be greater than 1.5xi rms the on resistance of the mosfet determines the conduction loss, which is given by: k r i p (on) ds 2 rms cond = where k is the temperature coefficient of the mosfet. the switching loss is related to q gd and q gs1 which determine the commutation time. q gs1 is the charge between the threshold voltage and the plateau voltage when a driver charges the gate, which can be read in the chart of v gs vs. q g of the mosfet datasheet. q gd is the charge during the plateau voltage. these two parameters are needed to estimate the turn-on and turn-off losses. gs1 g sw ds in sw dr th gd g ds in sw dr plt qr pvif vv qr vif vv =+ ? ? where v th is the threshold voltage, v plt is the plateau voltage, r g is the gate resistance, and v ds is the drain-source voltage. please note that calculating the switching loss is the most difficult part in the loss estimation. the formula above provides a simplified equation. for more accurate estimates, the equation becomes much more complex. the total gate charge, q g , is used to calculate the gate drive loss. the expression is sw dr g dr f v q p = where v dr is the drive voltage. selecting the output capacitor the output capacitor keeps the output voltage ripple small and ensures feedback loop stability. the output capacitor impedance must be low at the switching frequency. ceramic capacitors with x7r dielectrics are recommended for their low esr characteristics. for most applications, a 4.7 f ceramic capacitor in parallel with a 22 f electrolytic capacitor will suffice. setting the over voltage protection the open string protection is achieved through the detection of the voltage on the ovp pin. in some cases, an led string failure results in the feedback voltage always zero. the part then keeps boosting the output voltage higher and higher. if the output voltage reaches the programmed ovp threshold, the protection will be triggered. to ensure the chip functions properly, select the resistor values for the ovp resistor divider to provide an appropriate set voltage. the recommended ovp point is about 1.1 to 1.2 times higher than the output voltage for normal operation. high ovp low r v1.23(1 ) r =+ selecting dimming control mode the MP3394S provides two different dimming methods 1. direct pwm dimming an external pwm dimming signal is employed to achieve pwm dimming control. connect a 100k ? resistor from bosc pin to gnd and apply a pwm dimming signal?in the range of 100hz to 20khz?to the dbrt pin. the minimum recommended amplitude of the pwm signal is 1.2v. the low level should be less than 0.4v (see figure 4). MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 13 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. figure 4?direct pwm dimming table 1 shows the pwm dimming duty range with different pwm dimming frequency for most of applications. table 1 the range of pwm dimming duty f pwm (hz) d min d max 100 MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 14 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical application circuits 10 r3 nc r1 0 r9 vin gnd en dim c4 nc c5 c1 f1 l1 b360 d1 nc c7 c2 c6 c3 357k r2 10k r4 nc c8 led led1 led2 led3 led4 0 r12 0 r13 0 r15 0 r5 m1 100v/4a 2k r16 20k r18 nc c12 100k r14 330k r10 2k r8 20k r11 c9 270 r7 470nf c10 0.05 r6 8v-28v 12s 4p 120ma/string iset 6 dbrt 3 osc 5 en 2 comp 1 vcc 16 vin 15 led4 8 led3 9 led2 10 led1 11 ovp 12 gnd 4 isense 13 gate 14 bosc 7 u1 MP3394S nc c11 7.68k r17 nc c13 0 r19 nc c14 figure 1?application circuit 10 r3 nc r1 0 r9 vin gnd en dim c4 nc c5 c1 f1 l1 b360 d1 nc c7 c2 c6 c3 562k r2 10k r4 nc c8 led led1 led2 led3 led4 0 r12 0 r13 0 r15 0 r5 m1 100v/4a 2k r16 20k r18 nc c12 100k r14 220k r10 2k r8 20k r11 c9 270 r7 470nf c10 0.05 r6 8v-28v 18s 4p 120ma/string iset 6 dbrt 3 osc 5 en 2 comp 1 vcc 16 vin 15 led4 8 led3 9 led2 10 led1 11 ovp 12 gnd 4 isense 13 gate 14 bosc 7 u1 MP3394S nc c11 7.68k r17 nc c13 3 1,2, 5 ,6 4 m2 3 1, 2, 5,6 4 m3 3 1,2,5,6 4 m4 3 1,2,5,6 4 m5 0 r19 nc r20 vin m2-m5: am3490n 100v/1a tsop-6 gnd gnd gnd gnd gnd gnd figure 8 ? drive 18leds in series, 4 strings 120ma/string note: for vin>15v application, use r19 and r20(10k ? ) divider to make a 15v bias voltage for m2-m5. MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 15 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package information tssop16 with external thermal pad bottom view 2.80 3.30 3.65 4.15 note: 1) all dimensions are in millimeters . 2) package length does not include mold flash , protrusion or gate burr . 3) package width does not include interlead flash or protrusion. 4) lead coplanarity (bottom of leads after forming ) shall be 0.10 millimeters max. 5) drawing conforms to jedec mo-153, variation abt. 6) drawing is not to scale. 0.19 0.30 4.90 5.10 seating plane 0.65 bsc pin 1 id 4.30 4.50 6.20 6.60 18 9 16 0.80 1.05 1.20 max 0.00 0.15 top view front view side view 0.09 0.20 recommended land pattern 5.80 typ 1.60 typ 0.40 typ 0.65 bsc 3.30 typ 4.20 typ detail a 0.45 0.75 0 o -8 o 0.25 bsc gauge plane see detail "a" MP3394S?4-string, max 200ma/string white led driver MP3394S rev. 1.03 www.monolithicpower.com 16 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. soic16 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.020(0.50) x 45 o see detail "a" 0.0075(0.19) 0.0098(0.25) 0.150 (3.80) 0.157 (4.00) pin 1 id 0.050(1.27) bsc 0.013(0.33) 0.020(0.51) seating plane 0.004(0.10) 0.010(0.25) 0.386( 9.80) 0.394(10.00) 0.053(1.35) 0.069(1.75) top view front view 0.228 (5.80) 0.244 (6.20) side view 1 8 16 9 recommended land pattern 0.213 (5.40) 0.063 (1.60) 0.050(1.27) 0.024(0.61) note: 1) control dimension is in inches. dimension in bracket is in millimeters. 2) package length does not include mold flash, protrusions or gate burrs. 3) package width does not include interlead flash or protrusions. 4) lead coplanarity (bottom of leads after forming) shall be 0.004" inches max. 5) drawing conforms to jedec ms-012, variation ac. 6) drawing is not to scale. 0.010(0.25) bsc gauge plane MP3394S?4-string, max 200ma/string white led driver notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP3394S rev. 1.03 www.monolithicpower.com 17 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. soic20 note: 1) control dimension is in inches. dimension in bracket is in millimeters. 2) package length does not include mold flash, protrusions or gate burrs. 3) package width does not include interlead flash or protrusions. 4) lead coplanarity (bottom of leads after forming) shall be 0.10 millimeters max. 5) drawing conforms to jedec ms-013, variation ac. 6) drawing is not to scale. 0.013(0.33) 0.020(0.51) 0.496(12.60) 0.512(13.00) seating plane 0.050(1.27) bsc pin 1 id 0.291 (7.40) 0.299 (7.60) 0.394 (10.00) 0.418 (10.60) 1 10 11 20 0.093(2.35) 0.104(2.65) 0.004(0.10) 0.012(0.30) top view front view side view 0.009(0.23) 0.013(0.33) recommended land pattern 0.370 (9.40) 0.079 (2.00) 0.024 (0.61) 0.050 (1.27) see detail "a" 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.030(0.75) x 45 o 0.010(0.25) bsc gauge plane |
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