Integrated Power Supply
Description
Global Mixed-mode Technology Inc.
G5524A
Integrated Power Supply for TFT-LCD Panels with
4-Channel White LED Driver
Features
2.
5V to 5.
5V Input Supply Range Boost Regulator
640kHz/1.
2MHz Fixed Frequency Current-Mode Control Fast Transient Response to Pulse Load ±1% Accurate Output Voltage Built-In 20V/2A, 0.
2Ω N-Channel MOSFET High Efficiency up to 90% Programmable Soft-Start Over-Current Protection Output Under-Voltage Protection White-LED Driver Wide 4.
2V to 24V Input Supply Range Adjustable Switching Frequency
40V/2A, 0.
3Ω n-channel MOSFET Input Under-Voltage Protection Over Current Protection Over Voltage Protection Maximum Programmable LED Channel Current
50mA Maximum 3% Matching between Channels 100Hz~20kHz PWM Dimming High-Performance Operational Amplifiers ±150mA Output Short-Circuit Current 12V/µs Slew Rate 12MHz, -3dB Bandwidth Rail-to-Rail Input and Output Low Dropout Voltage Linear Regulator 350mA Maximum Output Current Adjustable Output Voltage On-Chip GPM Controller Adjustable Falling Time and Power-On Delay Flicker Compensator Power-On Sequence Control Charge pump for VGH regulation Low Voltage Detector Programmable Detecting Voltage and Delay Time Thermal Protection RoHs Compliant TQFN5X5-40 and TQFN3.
8X6.
2-44 Package
Applications
Notebook Computer Displays
UMPCs
LCD Monitor
General Description
The G5524A includes a high-performance boost regulator, 4-channel LED driver, a low dropout linear regulator (LDO), a gate pulse modulator (GPM), a voltage detector, a VCOM buffer (unity-gain OPA), and a VGH charge pump controller for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs).
The boost converter provides the regulated supply voltage for the panel source driver ICs.
The converter is a high switching frequency (640kHz or 1.
2MHz) current-mode regulator with an integrated 20V N-Channel 0.
2Ω MOSFET that allows the use of ultra-small inductors and ...
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