Datasheet Constant Current LED Drivers 50V 500mA 1ch Source Driver for Automotive BD83740HFP-M BD83740EFJ-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 detective function and overvoltage mute function 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 opened if multiple rows of LEDs are driven through multiple number of the ICs. Features (Note1) AEC-Q100 Qualified Variable form Constant-Current Source Driver PWM Dimming Function CR Timer for PWM Dimming Function Integrated LED Open detective Function Integrated Overvoltage Mute and Temperature Protection Functions Integrated Abnormal Output Detection and Output Functions (PBUS) (Note1: Grade 1) Application HRP7 HTSOP-J8 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 D1 RVIN F VIN F IOUT PWM in ZD1 CVIN VIN CIOUT D2 D3 CRT BD83740HFP-M DC in BD83740EFJ-M +B CCRT RCRT DISC FIN RPBUS PBUS GND Figure 1. Typical Application Circuit Product configuration: Silicon monolithic integrated circuit The product is not designed for radiation resistance. www.rohm.com TSZ02201-0T3T0B300170-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/29 TSZ2211114001 27.Apr.2018 Rev.003 BD83740HFP-M BD83740EFJ-M Pin Configurations (TOP VIEW) (TOP VIEW) VIN F 1 8 IOUT EXP-PAD VIN 2 7 CRT EXP-PAD 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 - EXP-PAD Connect to GND - EXP-PAD Connect to GND Block Diagram VIN F IOUT VIN VREF VREF VIN-0.180V ON/OFF (Typ) OSC CRT LED OPEN DET DISC VIN- 0.05V (Typ) GND PBUS PBUS Figure 4. Block Diagram www.rohm.com TSZ02201-0T3T0B300170-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/29 TSZ2211115001 27.Apr.2018 Rev.003 PBUS DISC CRT GND IOUT VIN F VIN