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| MOTOROLA Order Number: MC33286/D Rev. 5.4, 06/2001 Semiconductor Technical Data MC33286 Advance Information AUTOMOTIVE DUAL HIGH SIDE DRIVER SEMICONDUCTOR TECHNICAL DATA Automotive Dual High Side Driver This device is a dual high side power switch dedicated for automoive applications. In comparison with mechanical relays, this device offers higher reliability as well as protection and diagnostic features. The device consists of two independent 35m Rdson switches in a surface mount package. It can be directly interfaced with a microcontroller for control and diagnostic functions. The device is fully protected against overcurrents, short-circuits and incorporates an overtemperature shutdown. It can be directly and continuously supplied by the battery and offers a very low quiescent current in standby mode. * Designed for Automotive Applications * Junction Temperature Range from -40C to 150C * Operating Voltage Range from 8V to 40V * Maximum Breakdown Voltage greater than 40V * Surface Mount Package * 35m Rdson at 25C * Overtemperature Protection with Hysteresis * Under Voltage Shutdown * Reverse Battery protected * Open Load Detection in On-State * Diagnostic Output * ESD Protection 2kV * Current Limitation at 30A * Loss of ground protected * Standby Current less than 10A at Vbat = 14V DW SUFFIX SO20WB Package CASE 751D-05 PIN ASSIGNMENT Vbat Vbat Out1 Out1 Vbat Vbat NC In 1 St1 Vbatc 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 Vbat Vbat Out2 Out2 Vbat Vbat NC In 2 St2 Gnd ORDERING INFORMATION Device PC33286DW Operating Temperature Range TA=-40 to +125C Package SO20 Simplified Application Schematic 5V 5V 5V V BAT ST1 VBATC + - ST2 OUT1 MCU IN1 MC33286 OUT2 21W IN2 21W This document contains information on a new product. Specifications and information herein are subject to change without notice. TM (c) Motorola, Inc., 2001. All rights reserved. MC33286 MAXIMUM RATINGS Ratings Vbat and Vbatc Voltage : Continuous/Pulse OUT1, OUT2 Voltage with Respect to Gnd : Continuous/ Pulse OUT1, OUT2 to Vbtap Voltage : Continuous St1, St2 Voltage : Continuous/Pulse IN1, IN2 Voltage : Continuous/Pulse In1, In2, St1, St2 Current ESD all Pins OUT1, OUT2 DC Output Current OUT1, OUT2 Pulse Current (Note 1) THERMAL RATINGS Junction Temperature Storage Temperature Thermal Resistance Junction to Ambient (note 2) NOTES : 1. During lamps inrush current. Value internally limited. 2. Device mounted with minimum pcb dimensions. Symbol Vbat Vout Vout Vst Vin Iin Vesd Iout Ioutp Value -0.3 to 40 -0.3 to 40 Unit V V 40 -0.3 to 5.5 -0.3 to 10 +/-4 +/-2000 6 30 V V V mA V A A Tj Tst Rthja -40 to 150 -65 to 150 70 C C C/W ELECTRICAL CHARACTERISTICS Tj from - 40C to +125C, Vbat from 8V to 16V, unless otherwise noted.Typical values reflect approximate mean at 25C, V bat =12V, at time of device characterization. Characteristics Description Operating Voltage Under Voltage Threshold Drain-Source on Resistance Drain-Source on Resistance High Current Limitation Short-Circuit Current Limitation Body Diode Forward Voltage Body Diode Forward Voltage Hot Open Load Current Standby Current Supply Current : One Channel On Supply Current : Both Channels On Low Input Voltage High Input Voltage Input Hysteresis Input Current Status Voltage Thermal Shutdown Thermal Shutdown Hysteresis Output Maximum Positive Slew Rate Output Maximum Negative Slew Rate PWM frequency Turn-on Delay Time Symbol Min Vbat Vuv Rdson Rdson Ilimh Iliml Vf Vf Iol Istdby Ion1 Ion2 Vil Vih Vhyst Iih Vstatus Tshut T hyst Srpout Srnout fPWM tdon 100 0.05 0.15 150 20 0.2 0.8 0.5 1.5 150 150 3.5 0.4 0.7 20 0.9 100 0.5 8 7 25 35 30 10 0.7 0.6 400 700 10 10 20 1.5 Typ Max 40 8 35 50 V V m m A A V V mA A mA mA V V V A V C C V/s V/s Hz s In=2.5V to 10% Vout, Vbat=12V Load = 6, Vbat =12V Load = 6, Vbat =12V Vin = 3.5V Ist = 1mA ; Output in Fault V bat > 9V ; T j = 25C Vbat > 9V ; Tj = 150C VOUT > 1V VOUT < 1V, Tj = 25C Iout = -2A, Tj = 25C Iout = -2A, Tj = 125C Device in On State Vbat < 14V ; Vin < 0.8V In1 or In 2 in High State In1 and In 2 in High State Unit Conditions Automotive Dual High Side Driver 2 MC33286 ELECTRICAL CHARACTERISTICS Tj from - 40C to +125C, Vbat from 8V to 16V, unless otherwise noted.Typical values reflect approximate mean at 25C, V bat =12V, at time of device characterization. Characteristics Description Turn-off Delay Time Open Load to Status Low Delay Time Symbol Min tdoff TOL Typ 100 10 Max 150 s s IN = 2.5V to 90% Vout, Vbat=12V Unit Conditions FUNCTIONAL TRUTH TABLE Conditions Normal Operation IN1 L H L H X H X H H X H X IN2 L L H H X X H H X H X H OUT1 L H L H L L X L H X X X OUT2 L L H H L X L L X H X X St1 H H H H H L H L L H H H St2 H H H H H H L L H L H H Undervoltage Overtemperature Channel 1 Overtemperature Channel 2 Overtemperature Channel 1/Channel 2 Open Load Channel 1 Open Load Channel 2 Overcurrent Channel 1 Overcurrent Channel 2 L = `Low level' ; H = `High level' ; X = `don't care' Figure 1. Application Schematic Battery Vbatc 100nF OUT2 OUT2 Load 2 5V Vbat V bat V bat V bat V bat V bat Vbat Vbat Thermal Sensor Over Temp Status 2 Charge Pump CHANNEL 2 Vbatc OUT1 Open Load Input Trigger OUT1 Status pull-up resistors 10K 10K IN2 MCU IN1 U.V. Lockout Over Current Load 1 Status 1 CHANNEL 1 GND Automotive Dual High Side Driver 3 MC33286 PIN FUNCTION DESCRIPTION Pin No. Name/Function Description 1, 2, 5, 6, 15, 16, 19, 20 Vbat Supply Voltage These are the power supply pins of the device. These pins are directly connected with the lead frame of the package and are tied to the drain of the switching MOSFET. These pins can be directly connected to the battery voltage. In addition to their supply functions, these pins participate to the thermal behaviour of the device in conducting the heat from the switching MOSFET to the printed circuit board. Pins 3 and 4 are the output 1 terminals. Pins 17 and 18 are the output 2 terminals. They are directly connected to the source of the power MOSFET. The Rdson is 35m max per output at 25C. Its value increases up to 50m at 150C junction temperature. These are the device input pins, which directly control their associated output. The thresholds are CMOS compatible. When the input is in low state, the associated output MOSFET is off. 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 less than 1mA for Vbat up to 12V. These pins are the channel 1 and 2 status. Their internal structure is an open drain with an internal clamp at 6V. An external pull up connected to the 5V is needed. When the device is in normal condition the status is high. If open load or overtemperature occurs on one channel, the associated output status will be pulled low. See Functional Truth Table. This pin is the supply voltage pin for the control portion of the device. It has to be connected to the Vbat line and to the other Vbat pins listed above. An internal 45V zener diode is connected between pin 10 and Gnd. This is the Gnd pin of the device. 3, 4, 18, 17 OUT1 OUTPUT Channel 1 OUT 2 OUTPUT Channel 2 IN 1 INPUT Channel 1 IN 2 INPUT Channel 2 8, 13 9, 12 St1 Status for Channel 1 St2 Status for Channel 2 10 Vbatc VBAT Control GND GROUND 11 Automotive Dual High Side Driver 4 MC33286 FUNCTIONAL DESCRIPTION Input Trigger General Information The MC33286 has a special input trigger circuitry allowing This device is a dual high side power switch dedicated for the device to have less than 0.5A typical standby current. automotive applications. In comparison with mechanical When the input level is below 1.5V, the circuit is in sleep mode relays, this device offers higher reliability as well as protection (see Figure 4). and diagnostic features. It has been designed to be directly connected to the battery voltage. Status Output In the future, the number of electronic switches directly The output status is an open drain structure, active at low connected to the battery will increase, so the MC33286 level, so an external pull-up resistor is required to read the includes a special input trigger and architecture which allows status information. to have a very low standby current when the Vbat is lower than The status indicates the open load and the over 12V. temperature information. The output short-circuit, current The MC33286 concept uses a dual chip approach packaged limitation and Vbat undervoltage are not reported on the status in a single SO20 package. This low power package can be used because the ON resistance of the switch (35m max at 25C) pin. But an output short-circuit to Gnd will be detected by an guarantees a low power dissipation (less than 300mW) when overtemperature because the total power dissipation of the driving two 21Watts lamps. The two chips are internally connected device will make it reach the thermal detection. by die to die wire bonding to allow the transfer of analog and control information between the two dice. Open Load Function The two chips are the Control and Power dice. The open load detection is active during the ON phase (Hot The Control chip uses the SMARTMOS3.5NVM open load detection). An amplifier measures the differential volttechnology. The two channels of this control chip are totally age between Vbat and Vout (this value is typically 400mA) at symmetrical and independant. It drives the gate of the output 25C. power MOSFET and manages the analog information from the An open load condition will create a voltage lower than 12mV power MOSFET die to ensure power device protection. and the open load circuitry will detect it and will pull down the staThe Power chip uses the HDTMOS3 technology. It has tus output. If the open load condition is present before the device one independent sources plus current sensing cells for open turn-on, the status will be pulled down after a delay due to the rise load detection and current limitation. In addition, a thermal time of the output. sensor (diode) is located in the middle of each source to protect the MC33286 against overtemperature. The drain of Overcurrent Function (High Current Limitation) the Power die is connected to the battery voltage by the lead The device incorporates a current limitation at 30 Amps frame of the package. This lead frame has been especially typical when outputs are loaded (Vout > 1V) . A 21 Watts lamp developed and has eight pins connected together to the Vbat. has a nominal current of about 2 amp and at turn on, the MC33286 has to drive a peak current of about 12A, as the These pins are used as the Vbat connection as well as thermal lamp inrush current is about six times the nominal DC current. path. A standard current limitation set up at 30A will not being activated during the inrush current of one lamp but will protect Supply Voltage the circuit against overcurrent. Figure 3 shows the overcurrent The MC33286 can be directly connected to the Vbat line. threshold versus temperature. Figure 4 shows the supply voltage characteristics. The Vbatc (Vbat of Control die, pin 10) and Vbat (Vbat of power die, pins 1, 2, 5, 6, 15, 16, 19, 20) are not internally connected, so the Vbat Short Circuit Protection (Low Current Limitation) During a hard short-circuit to Gnd, the power dissipation and Vbatc have to be connected externally by the printed would be 30A x 14V = 420 Watts if only the overcurrent circuit board. limitation exists. The thermal protection will be activated and switch the device off. Nevertheless the peak power Under Voltage dissipation and energy is quite high. Figure 4 also shows the supply voltage characteristic Therefore, a short circuit protection has been when one or two sides of the MC33286 are turned on. From implemented and is activated when the output voltage is lower 0V to undervoltage level (7V typical), all blocks of the than about 1V . As shown in the Figure 5, the low current MC33286 are not totally supplied. The undervoltage threshold limitation decreases with temperature. In the case of a short value versus temperature is shown in Figure 2.The under circuit, the power dissipated in the device decreases with time voltage function allows the turn-off of the output transistor, due to the decay of the current limitation with temperature. because the Vbat voltage will be not enough to guarantee the full on state of the output transistor due to an incomplete drive Overtemperature Function of the gate. When the Vbat is greater than the undervoltage The overtemperature function uses a thermal sensor threshold, the supply current increases due to the charge located in the middle of each output power HDTMOS pump start up and MOSFET driver activation. transistor. The sensor is a diode connected to Vbat in the power die. The diode forward voltage varies of -2mV/C. So, Reverse Battery Protection by measuring the diode voltage the power output MOSFET When a negative battery voltage arises, the current flows temperature is monitored. This diode voltage information is in a reverse direction from the source region to drain region of transferred to the control die and compared to a reference both of the MosFets through the body diode. The limitation is voltage generated from the band gap reference generator. then the temperature reached by the junction, which is linked When the temperature reaches the overtemp threshold, the to the thermal impedance from the junction to the ambiant. circuit is turned off. As the input voltage is still high, the circuit is not in wake mode but the current consumption decreases due to the turn-off of the charge pump. The overtemperature Automotive Dual High Side Driver 5 MC33286 FUNCTIONAL DESCRIPTION comparator has an hysteresis which maintains the device off. As soon as the die power temperature decreases by around 20C the device automatically switches on again. If the cause of the overtemperature has not been removed, it is likely that the device will reach the overtemperature shutdown again and will cycle off and on until the overtemperature cause is removed. As soon as the device switches off, due to overtemperature, the status pin is pulled low to inform the microcontroller that an abnormal condition has occured. Automotive Dual High Side Driver 6 Figure 2. Undervoltage Threshold Versus Temperature Figure 3. High Current Limitation Versus Temperature 8 40 VOLTAGE (V) CURRENT (A) 6 30 4 20 2 10 0 -50 0 50 100 150 TEMPERATURE (C) Figure 4. Battery Supply Current Versus Vbat 0 -50 0 50 100 150 TEMPERATURE (C) 200 Figure 5. Short Circuit Current Limitation Versus Temperature 20 12 10 CURRENT (mA) 2 Sides ON CURRENT (A) 30 40 8 6 4 2 2 Sides OFF 0 0 10 20 BATTERY VOLTAGE (V) 1 Side ON 15 10 5 0 -50 0 50 100 TEMPERATURE (C) 150 200 Figure 6. OpenLoad Current Threshold Versus Temperature 600 RON, (NORMALIZED) 1,5 1,4 CURRENT (mA) 450 1,3 1,2 1,1 1,0 0,90 0,80 0 -50 0 50 TEMPERATURE (C) 100 150 0,70 -50 Figure 7. Ron Versus Temperature 300 150 -25 0 25 50 75 100 125 TEMPERATURE (C) Automotive Dual High Side Driver 7 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 MC33286/D |
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