BD83732HFP-MTR ROHM

Datasheet Constant Current LED Drivers 50V 500mA 1ch Source Driver for Automotive BD83732HFP-M BD83733HFP-M General Description Key Specifications BD83732HFP-M and BD83733HFP-M are 50V tolerant Input Voltage Range: 4.5V to 42V LED current drivers. Suitable for Automotive LED Max Output Current: 500mA (Max) applications, it can control light through constant current Output Current Accuracy: 5% (Max) output with control using PWM. Operating Temperature Range: -40C to +125C Having LED open/short detective circuit and LED current de-rating functions integrated, it can deliver high reliability. Packages W(Typ) x D(Typ) x H(Max) By utilizing Rohms patented PBUS function, it is possible HRP7 9.395mm x 10.540mm x 2.005mm to turn OFF all LEDs when a row of LEDs are short/open-circuited if multiple number of the ICs are used In case the LED connected to the output IOUT terminal has 2 LEDs in serise, BD83732HFP-M has to be used, in case of 3 LEDs in series - BD83733HFP-M ( Refer to Page.18 LED Open Detection / Disable LED Open Detection ). Features AEC-Q100 Qualified Variable form Constant-Current Source Driver PWM Dimming Function LED constant current set by external resistor LED Current De-rating Function HRP7 LED Open/Short detection Disable LED Open Detection at low power supply Temperature Protective Abnormal Output Detection and Output Functions (PBUS) 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 D1 RVIN F VIN F IOUT PWM in ZD1 CVIN VIN CIOUT D2 D3 CRT BD83732HFP-M DC in RDCIN BD83733HFP-M +B RPBUS1 CCRT RCRT DISC FIN ZD2 RPBUS2 PBUS GND RTHM 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 2014 ROHM Co., Ltd. All rights reserved. 1/29 2016.Aug.25 Rev.003 TSZ2211114001 BD83732HFP-M / BD83733HFP-M Pin Configurations (TOP VIEW) FIN(GND) 1 2 3 4 5 6 7 Figure 2. HRP7 Package Pin Configuration Pin Descriptions HRP7 Package Pin No. Pin Name Function 1 PBUS Error detection I/O, LED current de-rating input terminal 2 DISC Discharge setting pin 3 CRT Capacitor Resistor Timer setting 4 GND GND 5 IOUT Current output 6 VIN F Output current detection 7 VIN Power supply input If not used DISC should be shorted to GND. Block Diagram VIN F IOUT VIN VREF VREF VIN-0.180V FIN ON/OFF (Typ) OSC CRT LED OPEN LED OPEN LED GND SHORT DET DET DET MASK 7.65V/11.0V VIN- 0.6V DISC (Typ) 0.05V (BD83732HFP-M (Typ) (Typ) /BD83733HFP-M) LED GND PBUS Current Derate Figure 3. Block Diagram www.rohm.com TSZ02201-0G1G0C700310-1-2 2014 ROHM Co., Ltd. All rights reserved. 2/29 2016.Aug.25 Rev.003 TSZ2211115001 PBUS DISC CRT GND IOUT VIN F VIN