BD18341FV-ME2 ROHM

Datasheet Constant Current LED Drivers for Automotive Constant Current Controller for Automotive LED Lamps BD18340FV-M BD18341FV-M General Description Key Specifications BD18340FV-M/BD18341FV-M are 70V-withstanding Input Voltage Range: 4.5V to 19V Constant Current Controller for Automotive LED Lamps. FB Terminal Voltage Accuracy: 650mV 3% It is able to drive at maximum 10 rows of PNP transistors. Ta = 25C to 125C It can also contribute to reduction in the consumption Stand-by Current: 0A(Typ) power of the set as it has the integrated standby function., LED Current De-rating Accuracy: The IC also incorporates a highly reliable, in-built BD18340FV-M: 5% V =0.5 to 0.75V DCDIM de-rating function, LED Open Detection, Short Circuit BD18341FV-M: 12% V =0.5 to 0.75V DCDIM Protection and Over Voltage Mute function and LED failure input/output function. Operating Temperature Range: -40C to +125C Features (Note1) Package W(Typ) x D(Typ) x H(Max) AEC-Q100 Qualified LED Constant-Current Controller SSOP-B16 5.00mm x 6.40mm x 1.35mm PWM Dimming Function LED Current De-rating Function LED Open Detection Short Circuit Protection(SCP) Over Voltage Mute Function(OVM) Disable LED Open Detection Function at Reduced-Voltage Abnormal Output Detection and Output Functions (Note1: Grade1) Applications SSOP-B16 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 BD18340FV-M DISC BD18341FV-M RDCIN D VREG CD CVREG PWMOUT OPM ROPM PBUS RDCDIM GND DCDIM NTC Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.co.jp TSZ02201-0T1T0C700180-1-2 2016 ROHM Co., Ltd. All rights reserved. 1/35 TSZ22111 14 001 2019.02.28 Rev.003 VIN BD18340FV-M BD18341FV-M Pin Configuration (TOP VIEW) FB VIN 1 16 BASE 2 15 EN N.C. DISC 3 14 OP CRT 4 13 SCP D 5 12 GND 6 11 DCDIM PBUS VREG 7 10 PWMOUT OPM 8 9 Pin Description Pin Pin Pin Pin Function Function No. Name No. Name The terminal to set 1 FB Input terminal for feedback voltage 9 OPM Disable LED open detection voltage The terminal for connecting 2 BASE 10 VREG Internal reference voltage PNP Tr. BASE The terminal to set (Note 1) 3 N.C. Pin not connected internally. 11 DCDIM DC dimming The terminal The terminal to set 4 OP 12 D for LED open detection Disable LED open detection time The terminal The terminal to set 5 SCP 13 CRT for short circuit protection CR timer Discharge terminal for 6 GND GND 14 DISC CR timer The terminal 7 PBUS 15 EN Enable input Abnormal Output Detection and Output 8 PWMOUT CR timer signal output 16 VIN Power supply input (Note 1) Please be sure to floating at N.C. pin Block Diagram VREG VIN FB EN VREG BASE Over Voltage VREF Mute PBUS PBUS OPENLOAD OP VREG V IN OPM Control 1.2V OPEN Logic MASK VREG SCP SCP DELAY 20s D D COMP 1.2V 1.25V DELAY Rise 1s 1.0V DC Dimming VREG DCDIM 1.0V CRT CR TIMER DISC PWMOUT GND www.rohm.co.jp TSZ02201-0T1T0C700180-1-2 2016 ROHM Co., Ltd. All rights reserved. 2/35 TSZ22111 15 001 2019.02.28 Rev.003 1mA