Datasheet Constant Current LED Drivers 50V 500mA 1ch Source Driver for Automotive BD8374HFP-M BD8374EFJ-M General Description Key Specifications BD8374HFP-M and BD8374EFJ-M are 50V-withstanding Input Voltage Range: 4.5V to 42V LED source drivers. Most suitably for Automotive Max Output Current: 500mA (Max) LED driving, it can control light through PWM of constant Output Current Accuracy: 5% (Max) current output. Operating Temperature Range: -40C to +125C Having LED open/short detective circuit and overvoltage mute functions integrated, it can deliver high reliability. Packages W(Typ) x D(Typ) x H(Max) Also by utilizing our patented PBUS function, it is possible HRP7 9.395mm x 10.540mm x 2.005mm to turn OFF all LEDs in case where a row of LEDs are HTSOP-J8 4.90mm x 6.00mm x 1.00mm short/open-circuited if multiple rows of LEDs are driven through multiple number of the ICs. Features AEC-Q100 Qualified Variable form Constant-Current Source Driver PWM Dimming Function CR Timer for PWM Dimming Function Integrated LED Open/Short detective Circuit Function Integrated Overvoltage Mute and Temperature Protection Functions Integrated Abnormal Output Detection and Output Functions (PBUS) HRP7 HTSOP-J8 Application On-board Exterior Lamp (Rear Lamp, Turn Lamp, DRL/Position Lamp, Fog Lamp, etc.) On-board Interior Lamp (Air Conditioner Lamp, Interior Lamp, Cluster Light, etc.) Basic Application Circuit VIN F IOUT VIN CRT BD8374HFP-M BD8374EFJ-M DISC FIN PBUS GND Figure 1. Typical Application Circuit Product configuration: Silicon monolithic integrated circuit The product is not designed for radiation resistance. w ww.rohm.com TSZ02201-0G1G0C700310-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/29 TSZ2211114001 2016.09.06 Rev.003 BD8374HFP-M BD8374EFJ-M Pin Configurations (TOP VIEW) FIN(GND) (TOP VIEW) VIN F 1 8 IOUT VIN 2 7 CRT FIN(GND) N.C. 3 6 DISC GND 4 5 PBUS 1 2 3 4 5 6 7 Figure 2. HRP7 Package Pin Configuration Figure 3. HTSOP-J8 Package Pin Configuration Pin Descriptions HRP7 Package HTSOP-J8 Package Pin No. Pin Name Function Pin No. Pin Name Function 1 VIN F Output current detection 1 PBUS Error detection I/O 2 VIN Power supply input 2 DISC Discharge setting PWM dimming 3 N.C. N.C. 3 CRT timer setting 4 GND GND 4 GND GND 5 PBUS Error detection I/O 5 IOUT Current output 6 DISC Discharge setting 6 VIN F Output current detection PWM dimming 7 CRT 7 VIN Power supply input timer setting 8 IOUT Current output Block Diagram VIN F IOUT VIN VREF VREF VIN-0.180V ON/OFF (Typ) OSC CRT LED OPEN LED GND SHORT DET DET DISC VIN- 0.6V 0.05V (Typ) (Typ) GND PBUS PBUS Figure 4. Block Diagram www.rohm.com TSZ02201-0G1G0C700310-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/29 TSZ2211115001 2016.09.06 Rev.003 PBUS DISC CRT GND IOUT VIN F VIN