UBA3077HN Description
The UBA3077HN is a high efficiency LED driver in an HVQFN40 package for general LED lighting or backlighting LCD displays. Operating from a supply of 10 V to 42 V, it can drive up to 3 strings of 20 LEDs each. The low voltage circuitry is powered by an external 5 V voltage supply.
UBA3077HN Key Features
- Three-channel LED backlight driver
- ±2 % absolute LED current accuracy and channel-to-channel matching
- External power supply voltage from 10 V to 42 V and 5 V for low voltage circuitry
- Constant 500 kHz frequency peak current mode control
- Low value output capacitor (2 μF)
- Up to 150 mA per channel
- Peak LED current programmable with external resistor
- Three boost converters from VIN up to 75 V output voltage
- High efficiency up to 90 %
- 14-bit PWM dimming (either defined by system-generated PWMs, or internally generated) from 2.0 kHz to 24 kHz (duty cycle