UBA3077HN - NXP Semiconductors

UBA3077HN Three-channel switched-mode LED driver

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. The chip can operate autonomously or be controlled via a 400 kHz I2C-bus. The .

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 from 0.1 % to 100 %) „ Al.