Two Channel High Side Driver with Analog Sense for Automotive Applications

Rajkumar Sharma
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SKU: EL138982
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The project presented here is suitable for all types of resistive, inductive, and capacitive loads, and can also be used to drive LEDs. The board is built using 2 x VN5025AJ chips which are monolithic devices made using STMicroelectronics VIPower technology. It is intended for driving resistive or inductive loads with one side connected to the ground. Active VCC pin voltage clamp protects the device against low energy spikes. This device integrates an analog current sense which delivers a current proportional to the load current (according to a known ratio) when CS_DIS is driven low or left open. When CS_DIS is driven high, the CURRENT SENSE pin is in a high impedance condition. Output current limitation protects the device in overload conditions. In case of long overload duration, the device limits the dissipated power to a safe level up to thermal shut-down intervention. Thermal shut-down with automatic restart allows the device to recover normal operation as soon as the fault condition disappears.

Features

Power Supply 4.5V to 30V (Up to 36V Limited by Capacitor Voltage)
Load Current Up to 10 Amps Per Channel (Peak Current 41A)
Current Sense Voltage Output 0.5V/Amp
Under Voltage Threshold 3.5V
Turn On Delay 30 micro-Seconds (4.3Ohms Load)
Turn OFF Delay 50 micro-Seconds (4.3Ohms Load)
Temperature Shutdown Threshold 175 Degree Centigrade
Inrush current active management by power limitation
Very low standby current
0V CMOS-compatible input
Optimized electromagnetic emission
Very low electromagnetic susceptibility
In compliance with the 2002/95/EC European directive
PCB Dimensions 41.91 x 38.58 mm
4 x 3 mm mounting holes

Diagnostic functions

Proportional load current sense
High current sense precision for wide range currents
Current sense disables
Thermal shutdown indication
Very low current sense leakage

Protection

Undervoltage shut-down
Overvoltage clamp
Load current limitation
Self-limiting of fast thermal transients
Protection against loss of ground and loss of Vcc
Thermal shut down

Schematic

Parts List

NO	QNTY	REF	DESC	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	3	CN1,CN2,CN4	2 PIN SCREW TERMINAL PITCH 5.08MM	PHOENIX	DIGIKEY	277-1247-ND
2	2	CN3,CN5	5 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5318-ND
3	2	C1,C5	100nF/50V CERAMIC SMD SIZE 1206	YAGEO/MURATA	DIGIKEY
4	1	C2	100uF/35V SMD Electrolytic	NICHICON	DIGIKEY	493-2203-1-ND
5	2	C3,C4	10nF/50V CERAMIC SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
6	1	D1	LED RED SMD SIZE 0805	LITE ON INC	DIGIKEY	160-1427-1-ND
7	1	R1	4.7K 5% SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
8	6	R2,R3,R4,R6,R7,R8	10K 5% SMD SIZE 0805	YAGEO/MURATA	DIGIKEY
9	2	R5,R9	1.5K 5% SMD SIZE 1206	YAGEO/MURATA	DIGIKEY
10	2	U1,U2	VN5025AJTR-E	ST	DIGIKEY	497-11469-1-ND