Datasheet 6ch White LED Driver Built-in Current Driver Buck-Boost and Boost DC/DC Converter for Automotive BD81A76EFV-M General Description Key Specifications BD81A76EFV-M is a white LED driver with the Operating Input Voltage Range 4.5 V to 35 V capability of withstanding high input voltage Output LED Current Accuracy 3.0 % 50 mA (maximum 35 V). This driver has 6ch constant-current DC/DC Oscillation Frequency 200 kHz to 2200 kHz drivers in 1-chip, where each channel can draw up to Operating Temperature -40 C to +125 C 120 mA (Max), and it is suitable for high illumination LED Maximum Output Current 120 mA/ch LED drive. Furthermore, a buck-boost current mode LED Maximum Dimming Ratio 10,000:1 100 Hz DC/DC converter is also built to achieve stable PWM Minimum Pulse Width 1.0 s operation during power voltage fluctuation. Light modulation (10,000:1 100 Hz dimming function) is Packages W (Typ) x D (Typ) x H (Max) possible by PWM input. HTSSOP-B30 10.0 mm x 7.6 mm x 1.0 mm Features *1 AEC-Q100 Qualified 6ch Current Driver for LED Drive Buck-Boost Current Mode DC/DC Converter Control DC/DC Converter Oscillation Frequency by External Synchronized Signal Spread Spectrum Function LSI Protection Function (UVLO, OVP, TSD, OCP, SCP) LED Abnormality Detection Function (Open/Short) HTSSOP-B30 VOUT Discharge Function (Buck-Boost Structure BD81A76EFV-M Limitation) *1 Grade 1 Applications Automotive CID (Center Information Display) Panel Car Navigation Cluster Panel HUD (Head Up Display) Small and Medium Type LCD Panels for Automotive Use Typical Application Circuit Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays This product is protected by U.S. Patent No.7,235,954, No.7,541,785, No.7,944,189. www.rohm.com TSZ02201-0T2T0B200370-1-2 2019 ROHM Co., Ltd. All rights reserved. 1/38 3.Feb.2020 Rev.002 TSZ22111 14 001 BD81A76EFV-M Pin Configuration (TOP VIEW) Pin Description Pin No. Pin Name Function 1 VCC Input power supply pin 2 SS Soft Start capacitor connection 3 COMP Error Amp output 4 RT Oscillation frequency setting resistor connect 5 SYNC External synchronization input pin 6 SSCG Spread spectrum setting capacitor pin 7 GND Small signal GND pin 8 PWM PWM light modulation signal input pin 9 FAIL1 Failure signal output pin 1 10 FAIL2 Failure signal output pin 2 11 LEDEN1 Enable pin 1 for LED output 12 LEDEN2 Enable pin 2 for LED output 13 LED1 LED output pin 1 14 LED2 LED output pin 2 15 LED3 LED output pin 3 16 LED4 LED output pin 4 17 LED5 LED output pin 5 18 LED6 LED output pin 6 19 OVP Over voltage detection pin 20 ISET LED output current setting pin 21 PGND LED output GND pin 22 OUTL Low side FET gate pin 23 DGND DC/DC converter output GND pin 24 VDISC Output voltage discharge pin 25 SW High side FET source pin 26 OUTH High side FET gate pin 27 BOOT High side FET driver power supply pin 28 VREG Internal constant voltage 29 EN Enable pin 30 CS DC/DC converter input current sense pin - EXP-PAD Back side thermal PAD (Connect to GND) www.rohm.com TSZ02201-0T2T0B200370-1-2 2/38 2019 ROHM Co., Ltd. All rights reserved. 3.Feb.2020 Rev.002 TSZ22111 15 001