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| Freescale Semiconductor, Inc. MOTOROLA Order Number: MC33288/D Rev. 4.8, 06/2001 Semiconductor Technical Data MC33288 Advance Information Solid State Relay for Automotive Flasher Applications This device is a Dual High Side Power Switch dedicated for automotive flasher applications. In comparison with mechanical solutions, this device offers higher reliability as well as protection and diagnostic features. The device consists of two 25m Rdson fully protected high side switches, in a surface mount power package. It interfaces directly with a microcontroller and includes a current recopy function in order to allow the detection of a failed lamp in the application. SOLID STATE RELAY FOR AUTOMOTIVE FLASHER APPLICATIONS SEMICONDUCTOR TECHNICAL DATA DH SUFFIX HSOP20 Package CASE 979-04 Freescale Semiconductor, Inc... PIN ASSIGNMENT Vbat 21 * Designed for Automotive Flasher Applications * Junction Temperature Range from - 40C to 150C * Operating Voltage Range from 8V to 35V * Maximum Breakdown Voltage greater than 40V * Protected in case of loss of ground * Surface Mount Power Package * 25m Rdson per Channel at 25C * 8Amps Nominal Current per Channel * 1.2W Warning Lamp Driver * Overtemperature Protection with Hysteresis * Open Load Detection in On-State * Short-Circuit Protection * Overload Current Protection * Current Recopy to Monitor Lamp Output Current * Under Voltage Shutdown * ESD Protection 2kV * Standby Current less than 10A at Vbat less than 14V GND Cur R IN-1 NC DNC* Out-1 Out-1 Out-1 NC NC 1 2 3 4 5 20 19 18 17 16 Wlp Status IN-2 NC DNC* Out-2 Out-2 Out-2 NC NC Heat sink 6 7 8 9 10 21 15 14 13 12 11 Vbat * Do Not Connect ORDERING INFORMATION Device MC33288DH MC33288DHR2 Operating Temperature Range TA=-40 to +125C TA=-40 to +125C Package HSOP20 HSOP20 Simplified Application Schematic 5V 5V + - VBAT 10k OUT-1 Buzzer IN-1 I/O I/O IN-2 ST Cur R A/D Warning switch Gnd dashboard direction indicator Wlp 1.2W Car right side lamps This document contains information on a new product. Specifications and information herein are subject to change without notice. TM Trailor 21W 21W 21W 5W 5W MCU I/O Turn switch MC33288 Static Flasher Car left side lamps OUT-2 21W 21W 21W 5W 5W dashboard trailer indicator (c) Motorola, Inc., 2001. All rights reserved. For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. MC33288 PINS FUNCTION DESCRIPTION Pin No. Name/Function Description TAB Vbat Supply Voltage The backside TAB is connected to the power supply of the MC33288DH. In addition to its supply function, this pin contributes to the thermal behaviour of the device by conducting the heat from the switching MOSFET to the printed circuit board. Pins 6,7,8 are the source of the output1 25mOhm MOSFET1. Pins 13,14,15 are source of the output 2 25mOhm MOSFET2. They deliver current to the connected loads and are respectively controlled via the IN1 and IN2 pins. These outputs are current limited and thermally protected. These are the device input pins which directly control their associated outputs. The levels are CMOS compatible. When the input is a logic low, the associated output MOSFET is in the off state. When input is high, the MOSFET is turned on and the load is activated. When both inputs are low, the device is in standby mode and its supply current is reduced. Each input pin has an internal active pull down, so that it will not float if disconnected. The Fault output is an open drain indication that goes active low when a fault mode (Openload, Overtemp) is detected by the device on either one channel or both simultaneously. Its internal structure is an open drain architecture with an internal clamp at 6V. An external pull up resistor connected to Vdd (5V) is needed. See Functional Truth Table. This pin is the source of a 3.2 Ohm MOSFET. This output is current limited and thermally protected. It delivers current through the connected load when both IN1 and IN2 inputs are logic high. It is usually used as a warning lamp driver for Flasher application. The Current Sense pin deliver a ratioed amount (1/1000) of the sum of the currents that can be used to generate signal ground referenced output voltages for use by the microcontroller. These pins are not used. These pins must not be connected. This is the Ground pin of the device. 6,7,8 13,14,15 OUT1 OUTPUT Channel 1 OUT 2 OUTPUT Channel 2 IN 1 INPUT Channel 1 IN 2 INPUT Channel 2 3 18 Freescale Semiconductor, Inc... 19 Status Status for both Channels 20 Wlp Warning Lamp Output 2 Cur R Load Current Sense NC Not Connected DNC Do Not Connect GND GROUND 4, 9, 10, 11, 12, 17 5, 16 11 Solid State Relay for Automotive Flasher Applications For More Information On This Product, Go to: www.freescale.com 2 Freescale Semiconductor, Inc. MC33288 Block Diagram and Application Schematic Battery Cb Out-2 Out-2 Out-2 Charge Pump 21+5W Trailor Left side 5V 21+21+5W Left side 10K Input Trigger CHANNEL 2 Left Over Temp Over Current V batc Open Load Fault St-1 Monitoring CHANNEL 1 Right Vbat Drive & protect Warning Lamp Driver Wlp Current Recopy Cr 1 21+21+5W Right side IN-2 Out-1 Out-1 Out-1 V bat I/O R IN-2 St-2 Cr 2 MCU I/O I/O R R R IN-1 ST Freescale Semiconductor, Inc... A/D Cur R Rcr Current copy resistor MC33288 Vbat Rwlp 1.2W 21+5W Trailor Right side R : 10k typical Rcr : 500 to 1k typical Cb : 100nF to 470nF Rwlp : 100 typical GND FUNCTIONAL TRUTH TABLE In-1 Normal Operation L H L H H X H L X X H H X L L H H X H X X H L H X H In-2 L H L H H X L L X X L H X Out-1 L L H H X H X X L L L X H Out-2 H H H H L L L H L H L H H St Openload Channel 1 Openload Channel 2 Overtemp Channel 1 Overtemp Channel 2 Overtemp Channel 1 and Channel 2 Overcurrent or Current limit Channel 1 (note) Overcurrent or Current Limit Channel 2 (note) L = `Low level' H = `High level'X = `don't care' NOTES : In case of over current or short-circuit, the device will not report the fault to the status pins. The output current will be limited to the Ilim value. The device will probably heat up and in this case the overtemperature detection will be triggered. If so, the output will be turned off and the fault will be reported to the status pins. Solid State Relay for Automotive Flasher Applications For More Information On This Product, Go to: www.freescale.com 3 Freescale Semiconductor, Inc. MC33288 MAXIMUM RATINGS Ratings ELECTRICAL RATINGS Vbat Voltage with Respect to Gnd : Continuous/Pulse Out-1 & Out-2 Voltage with Respect of Gnd : Continuous/Pulse Out-1 to Vbat & Out-2 to Vbat voltage : Continuous/Pulse IN-1, IN-2, St DC Voltage : Continuous/Pulse Cur R Voltage : Continuous/Pulse ESD all Pins Human Body Model (note1) Machine Model (note2) Out-1, Out-2 Output Current : Pulse (note 3) IN-1, IN-2, St THERMAL RATINGS Junction Temperature Storage Temperature Range Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient (note 4) Power Dissipation at Tcase 140C (note 5) Tj Tst Rthjc Rthja Pd - 40 to 150 - 65 to +150 2 25 5 C C C/W C/W W Vbat Vout Vout Vin Vcr -14 to + 40 -0.3 to 40 40 -0.3 to 7 -0.3 to 7 V V V V V Symbol Value Unit Vesd1 Vesd2 Ioutp Iin +/-2000 +/-200 40 +/-5 V V Amp mA Freescale Semiconductor, Inc... NOTES : 1. EDS1 testing is performed in accordance with the Human Body Model (Czap = 100pF, Rzap = 1500) 2. EDS2 testing is performed in accordance with the Machine Model (Czap = 100pF, Rzap = 0) 3. During lamp inrush current. 4. Device mounted on dual side printed circuit board with 70m copper thickness and 10cm2 copper heat sink (2.5 cm2 on top side and 7.5 cm2 on down side). 5. Assuming a 150C maximum junction temperature. ELECTRICAL CHARACTERISTICS Description (Vbat from 9 to 16V and junction temperature Tj from -40 to 150C, unless otherwise noted) Characteristics Symbol min. Nominal Operating Voltage Functional Operating Voltage Under Voltage Threshold Vbat Standby Supply Current Supply Current in On State Vbat Vbat Vuv Istdby Ion 9 8 6 7 1 8 typ. max. 16 35 8 10 20 V V V A mA Vbat <14V & Vin = 0V,Tj <125C IN-1 & IN-2 @3.5V, no fault, Vbat<14V,Tj <125C Iout =4A, Vbat > 9V & Tj = 25C Iout = 4A, Vbat > 9 & T j = 150C Vout > 1V Vout < 1V, Tj=25C Unit Conditions Drain to Source on Resistance Drain to Source on Resistance High Current Limitation Short Circuit limitation Hot Openload Threshold Vbat to Output Breakdown Voltage Rdson Rdson Ilim Ilim Iol Vdss 40 20 30 30 4 1 25 40 m m A A A V In-1 and In-2 @ 0V, Vout = 0, Iout -0.25mA Vin-1 =0V, Vbat =35V, Vout-1=0V Vbat to Out-1 : Leakage Current Iout-leak 10 A Solid State Relay for Automotive Flasher Applications For More Information On This Product, Go to: www.freescale.com 4 Freescale Semiconductor, Inc. MC33288 Characteristics Description Symbol min. Vbat to Out-2 : Leakage Current Vin-1, Vin-2 : Input Voltage Low Threshold Vin-1, Vin-2 : Input Voltage High Threshold Vin-1, Vin-2 : Input Voltage Hysteresis Vin-1, Vin-2 : Input Current Status Output Voltage Thermal Shutdown Thermal Shutdown Hysteresis Current Recopy Ratio Iout-leak Vil Vih Vih Iin Vst Tshut Thyst Cr 150 10 1/1000 3.5 0.4 0.7 18 0.9 40 0.5 typ. max. 10 1.5 A V V V A V C C Vout>Vbat -1V, Iout from 2A to 4A Tj -40C to 105C, Vbat 9 to 16V 10 % Vout >Vbat -1V, Iout from 2A to 4A Tj -40C to 105C, Vbat 9 to 16V Vout >Vbat -1V, Iout from 1A to 8A 20 7 1.5 100 50 3.2 5 500 150 0.01 0.01 1 1 0.3 0.3 30 40 2 2 200 200 % V Hz Hz % mA C V/s V/s s s load = 6 load = 6 load = 6 , from Vin/2 to 10% Vout load = 6 , from Vin/2 to 90% Vout Iout =100mA, Vbat > 9V & Tj = 25C Iout =100mA, Vbat > 9V & Tj = 125C Vout =0V Vout >Vbat -1V, Iout from 1A to 8A Vin-1, Vin-2 = 3.5V Ist = 1mA; Output in Fault Vin-2 =0V, Vbat =35V, Vout-2=0V Unit Conditions Freescale Semiconductor, Inc... Current Recopy Ratio Accuracy Cr-ac -10 Extended Current Recopy Ratio Extended Current Recopy Ratio Accuracy Current Recopy Clamp Voltage At 10mA Nominal Flasher Frequency Operation Frequency Operation Nominal Flasher Duty Cycle Operation Wlp output Drain to Source on Resistance Wlp output Drain to Source on Resistance Wlp output Current Limitation Wlp Thermal Shutdown Maximum Output Positive Slew Rate Maximum Output Negative Slew Rate Turn On delay time Turn Off delay time Crex Crex-ac Vclst Ffl Fop DCfl RWon RWon IWlim TWshut Tr Tf Tdon Tdoff -20 5.5 1/1000 Solid State Relay for Automotive Flasher Applications For More Information On This Product, Go to: www.freescale.com 5 Freescale Semiconductor, Inc. MC33288 DEVICE DESCRIPTION device incorporates a current limitation at 30 Amps typical. Introduction This mean that the really first inrush current will be clamped at The MC33288DH is a dual high side switch with 30 Amps. The second lamp turn on of the flashing cycle will appropriate control, protection, and diagnostic features not see any clamping as the lamps have been heated up in the dedicated to automotive flasher applications. The device previous cycle. consists of two independent 25m power switches and an In-1 and In-2 are the two inputs of the device, connected to additionnal 3.2 Ohm high side switch capable of controlling a a microcontroller I/O ; they are CMOS compatible. When 1.2W warning lamp. It interfaces directly with a microcontroller these inputs are in low state, the device is in standby mode. and the package used is a HSOP20 power small outline, 20 When any of the inputs are switched to a high level, the pins. The MC33288 incorporates a status pin and a load associated output MOSFET is turned on. current sense capability. Power Supply The MC33288 can be directly connected to the supply line. In standby mode (In-1 & In-2 @ OV), the supply current is less than 10A for Vbat supply voltage below 14V. This feature allows a very low supply current on the battery when the car is idle or parked. During off state, the current recopy pin and the status pins are in high impedance. In case of loss of (digital) ground, the power MOSFETs turn off in order to safely tie the load current to zero. Nominal Voltage and Transient Operation The nominal operation voltage is from 9 to 16V. The MC33288 is functional over a larger voltage range from 8V to 35V. The technology used for both power and analog circuitry sustains 40V DC voltage. Reverse Battery The MC33288 is self protected against reverse battery up to -14 Volts in a continuous mode. When a negative battery voltage arises, the MOSFETS are internally turned off. The load current flows in the body diode of each MOSFET. The power dissipation within the MC33288DH is then Vf x Iload, where Iload is the total current set by the loads and Vf is the forward body diode voltage. Vf is 0.5V typical at 150C and decreases with temperature with a drop of -2mV/C. Power Output Switches The device has two independent high side switches. Each switch is realised with an N-channel power MOSFET and includes current and temperature sensing circuitries. The MOSFET gates are driven by analog circuitry which includes charge pump and fault detection. A specific feature of this device is the output current recopy. Each output has a 25m Rdson max at 25C. The Rdson value reaches 40m at 150C junction temperature. Each output has a parasitic drain to source diode, inherent to the technology. This diode can sustain as much current as the MOSFET. This diode is reversed biased during normal operation of the MOSFET and is forward biased during reverse battery or negative transient pulses. The output MOSFET can each drive 8 Amps nominal. This maximum current condition occurs when up to three 21W lamps and two small 5 or 7W lamps are connected on each channel, at higher Vbat voltage specification. This is the case when a trailor is attached to the car. As the flasher can operate in warning or hazard operation mode with its two channels on, the MC33288 can drive 16 Amps total. When lamps are turned on, the inrush current can reach up to 6 times the nominal lamp current. For this particular application, the total inrush current can reach 6 time 8 Amps, that is up to 48Amps per channel. The 48Amps value will only occur at the first lamp turn on. In order to optimise the total system,(MC33288, printed circuit board, wiring, fuse etc.) the Status The device has a single status pins which reports an over temperature and an openload condition in the device. This pin is an open drain structure and needs an external pull up resistor. The device incorporates overtemperature sense on each output MOSFET in order to independently protect each output. But , the report of the overtemperature is done through one single status pin called Status, in order to minimise the number of I/O connection of the MCU. Open Load Function The open load detection is active during the ON phase (Hot open load detection). An amplifier measures the differential voltage between Vbat and Vout . When the load current is below 1A, the open load circuitry will pull down the status output. If the open load condition is present before the device turn-on, the status will be pulled down after a delay due to the rise time of the output. Current Recopy Function Flasher application needs to detect failed lamp. The system must detect one 21W lamp failing, in the flasher application only, without a trailor. The MC33288 has an output current recopy function which recopies on the Cur R pin a portion of the output current. Each channel is connected to the same Cur R pin as the system have to operate in the flasher mode only and not in the warning operation. The MC33288 provides a current recopy of 1/1000 of the main output current, either output left or right. The recopy function has its higher accuracy of +-10% in the usual operation range and an accuracy of +-20% in the total operating range. This allows a precise detection of one 21W lamp, but also the detection of additional lamps in case of trailor connection. An external resistor must be connected to the Cur R pin and then tied to a microcontroller A/D input for analog voltage measurement. The Cur R pin is internally clamped to protect the MCU A/D input. Warning Lamp Driver The warning lamp driver is a 3.2 Ohms Rdson max High Side MOSFET to control the 1.2W dashboard warning lamp. This output is current limited and thermally protectedactivated only in the warning mode. It is turned on by activation of both right and left inputs (IN1 and IN2) Package The device is assembled into a power surface mount package. This package offers high thermal performances and high current capabilities. It offers 10 pins on each package sides and an additional pin which is the package heat sink , called pin 21. The heak sink acts as the MC33288 power Vbat connection. Freescale Semiconductor, Inc... For More Information On This Product, Go to: www.freescale.com Freescale Semiconductor, Inc. MC33288 Soldering Information This device is packaged in a Surface Mount Power package indended to be soldered directly on the Printed Circuit Board. This device was qualified according to JEDEC standards JESD22-A113-B and J-STD-020A with the reflow conditions applicable for packages with thickness above 2.5mm : Convection 220C +5/-0C VPR 215-219C IR / Convection 220C +5/-0C The maximum peak temperature during the soldering process should not exceed 220C (+5C/-0C). The time at maximum temperature should range from 10 to 40s max. Thermal Management The junction to case thermal resistance is 2C/W maximum. The junction to ambient thermal resistance is dependent on the mounting technology and the addition of heat sink. One of the most commonly used mounting technique consists in using the printed circuit board and the copper lines as heat sink. Figure 1. Printed Board Layout Example (not to scale) Down side pcb 8 cm2 Top side pcb 2 cm2 Figure 2. Simplified Thermal Model (Electrical Equivalent) Chan 1 Junction Temp Node (Volts represent Die Surface Temperature) Temp Node Chan 2 Junction Chan 1 Switch Rthjc1 2C/W Chan 1 Power (W) (1.0A=1W of Power Dissipation) Rthca (1.0=1C/W) 25C/W Chan 2 Switch Rthjc2 2C/W Case Temp Node Chan 2 Power (W) Ambient Temp Node (1.0V=1C) AmbientTemperature Freescale Semiconductor, Inc... Transient Thermal Model A more complete model including thermal capacitance is proposed in figure 3. Figure 3. Transient thermal model 5mJ/K 5mJ/K 1mJ/K MOS3 HSOP20 4mJ/K 3.5K/W 3.5K/W MOS1 3K/W 3K/W 450K/W MOS2 3K/W Case 3K/W Control Thermal via from top to down side pcb external pcb (4x4 cm) 0.5J/K Ambiant Board 20K/W 6J/K 300K/W Figure 1 shows an example of printed circuit board layout. It has a total of 10cm2 additional copper on two sides (2.5 cm2 on the top side and 7.5 cm2 on the down side). With the above layout, thermal resistance junction to ambient of 25C/W can be achieved, this value being splitted into : * junction to case : Rthjc1 = Rthjc2 = 2C/W * case to ambient : Rthca = 23 C/W. Lower value can be reached with the help of larger and thicker copper metal, higher number of thermal via from top to down side pcb and the use of additional thermal via from the circuit board to the module case. Steady State Thermal Model The junction to ambient thermal resistance of the circuit mounted on a printed circuit board can be splitted into two main parts : junction to case and case to ambient resistances. A simplified steady state model is shown in figure 2. This gives a thermal impedance versus time (figure 4), which has been determined with the printed circuit board shown in figure 1. Figure 4. Junction to ambiant Thermal impedance 30 Thermal impedance (C/W) 20 10 0 0 100 200 300 Time (sec.) 400 500 600 700 800 This figure shows that the steady state is reached after about 10 minutes. It also clearly shows that the device can dissipate almost twice the power within one minute compared to the maximum allowed power dissipation in steady state. Solid State Relay for Automotive Flasher Applications For More Information On This Product, Go to: www.freescale.com 7 Freescale Semiconductor, Inc. Freescale Semiconductor, Inc... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typical" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or un authorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the parts. Motorola and an Equal Employment Opportunity/Affirmative Action Employer. are registered trademarks of Motorola, Inc. Motorola, Inc. is How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1-303-675-2140 or 1-800-441-2447 Technical Information Center: 1-800-521-6274 JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3-20-1, Minami-Azabu, Minato-ku, Tokyo 106-8573 Japan. 81-3-344-3569 ASIA / PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2, Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. 852-26668334 HOME PAGE: http://www.motorola.com/semiconductors MC33288/D For More Information On This Product, Go to: www.freescale.com |
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