Datasheet Constant Current LED Drivers Constant Current Controller for Automotive LED Lamps BD18342FV-M General Description Key Specifications BD18342FV-M is 70V-withstanding constant current Input Voltage Range: 4.5 V to 19 V controller for automotive LED lamps. It is able to drive at FB Pin Voltage Accuracy: 650 mV 3 % maximum 10 rows of PNP transistors. It can also Ta=25 C to 125 C contribute to reduction in the consumption power of the Stand-by Current: 0 A (Typ) set as it has the built-in standby function. The IC provides Operating Temperature Range: -40 C to +125 C high reliability because it has LED open detection, short circuit protection, over voltage mute function and LED Package W (Typ) x D (Typ) x H (Max) failure input/output function. SSOP-B16 5.00 mm x 6.40 mm x 1.35 mm Features (Note 1) AEC-Q100 Qualified PWM Dimming Function LED Open Detection Short Circuit Protection (SCP) Over Voltage Mute Function (OVM) Disable LED Open Detection Function at Reduced-Voltage LED Failure Input/Output Functions (PBUS) (Note 1) Grade1 SSOP-B16 Applications Automotive LED Exterior Lamp (Rear Lamp, Turn Lamp, DRL/Position Lamp, Fog Lamp etc.) Automotive LED Interior Lamp (Air Conditioner Lamp, Interior Lamp, Cluster Light etc.) Typical Application Circuit RFB1 RFB2 VIN FB PWM in D1 RLIM ZD1 CVIN1 CVIN2 EN BASE D2 CRT OP DC in D3 CCRT RCRT SCP CLED DISC BD18342FV-M RDCIN VREG D CVREG CD PBUS OPM ROPM GND Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0T3T0B300230-1-2 2018 ROHM Co., Ltd. All rights reserved. 1/35 TSZ22111 14 001 18.Sep.2018 Rev.001 BD18342FV-M Pin Configuration (TOP VIEW) FB 1 16 VIN BASE 2 15 EN N.C. 3 14 DISC OP 4 13 CRT SCP 5 12 D GND 6 11 N.C. PBUS VREG 7 10 N.C. OPM 8 9 Pin Description Pin No. Pin Name Function 1 FB Feedback voltage input 2 BASE Connecting PNP Tr. BASE (Note 1) 3 N.C. No internal connection 4 OP LED open detection input 5 SCP Short circuit protection input 6 GND GND 7 PBUS Output for fault flag / Input to disable Output current (Note 1) 8 N.C. No internal connection 9 OPM Connecting resistor for disable LED open detection voltage setting at reduced voltage 10 VREG Internal reference voltage output (Note 1) 11 N.C. No internal connection 12 D Connecting capacitor for disable LED open detection time setting 13 CRT Connect capacitor and resistor to set output current ON Duty 14 DISC Connecting resistor to set output current on time 15 EN Enable input 16 VIN Power supply input (Note 1) Leave this pin unconnected www.rohm.com TSZ02201-0T3T0B300230-1-2 2018 ROHM Co., Ltd. All rights reserved. 2/35 TSZ22111 15 001 18.Sep.2018 Rev.001