Boost White LED Driver
Description
Global Mixed-mode Technology Inc.
G5139
Boost White LED Driver with PWM Brightness
Control in 2mm x 2mm TDFN Package
Features
2.
7V to 7V Input Voltage Range 600kHz Operating Frequency 38V High Output Voltage Over-Voltage Protection 5kHz to 100kHz PWM Brightness Control Built-in Cycle-by-Cycle Current Limit 0.
2V Low Reference Voltage TDFN2X2-6 Package
Applications
Cellular Phone LED Module Compact Back Light Module
General Description
The G5139 boost converter contains a 0.
46Ω internal switch.
The IC operates at constant frequency 600 kHz, allowing the use of tiny, low cost and low height inductors and capacitors.
The IC operates from a 2.
7V to 7V supply voltage.
High inrush current at start-up is eliminated using large compensation capacitor.
Constant frequency current mode PWM architecture results in low, predictable output noise.
The G5139 includes cycle-by-cycle 700mA current limit to maximize inductor current and over-temperature protection ci...
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