ROHM Semiconductor BD83A44 Automotive White 4-Channel LED Driver
ROHM Semiconductor BD83A44 Automotive White 4-Channel LED Driver is for LCD backlights. The ROHM BD83A44 LED driver features MOS for boost and 4-channel current drivers for LED drive, making the device ideal for high-brightness LED drives. A 50V LED pin maximum voltage makes the driver suitable for driving medium LCD panels. The pulse width modulation (PWM) signal controls dimming and can be set to 20,000:1 at 100Hz. BD83A44 supports analog dimming and accommodates even higher brightness ranges by combining with PWM dimming. DC/DC converters can be controlled for boost applications. The AEC-Q100-qualified BD83A44 LED driver operates in a 4.5V to 48.0V input voltage range.
Features
- AEC-Q100 qualified
- Functional safety supportive automotive products
- Built-in 4-channel current driver for LED driver
- Built-in MOS for boost
- Current mode boost DC/DC converter
- Load switch (M1) control pin
- PWM dimming (20,000:1 at 100Hz, 100Hz to 25kHz)
- Spread spectrum function
- DC/DC oscillation frequency external synchronization function
- LSI protection functions
- Undervoltage lockout (UVLO)
- Overvoltage protection (OVP)
- Short-time delay (TSD)
- Overcurrent protection (OCP)
- LED anode/cathode short circuit protection function
- LED open/short protection function
- VQFN24FV4040 4.0mm x 4.0mm x 1.0mm package
Applications
- Automotive center information display (CID) panels
- Navigation
- Cluster panels
- Head-up displays (HUD)
- Other small- and medium-sized LCD panels for automotive
Specifications
- 4.5V to 48.0V input operating voltage range
- ±5.0% output LED current absolute accuracy at 80.1mA, Ta = -40°C to +125°C
- 200kHz to 2420kHz DC/DC oscillation frequency range
- 130mA/ch maximum LED current
- 20,000:1 at 100Hz maximum LED dimming ratio
- 50V LED1 to LED4 pin maximum voltage
- -40°C to +125°C operating temperature range
Application Circuit
Internal Block Diagram
公開: 2026-09-14
| 更新済み: 2026-09-16