Datasheet > G5562/A

G5562/A

更新时间： 2024-11-15 17:01:59

品牌	Logo	应用领域
致新 - GMT		/
页数	文件大小	规格书
4页	126K
描述
Async-Boost, Async-Buck, VGH/VGL Charge-Pump, GPM, VCOM, Voltage Detector, HV LDO

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G5562/A 数据手册

Global Mixed-mode Technology Inc.

G5562

Bias Power Supply with High-Speed Amplifier and

High-Accuracy LDO for LCD TVs

General Description

Features

8V to 14V Input Voltage Range

The G5562 DC-DC converter provides regulated volt-

ages required by thin-film transistor (TFT) liquid crystal

displays (LCD) panels in TQFN package. One step-up

converter, one step-down converter, and two charge

pumps convert the 8V to 14V input voltage into four

output voltages. These features complete the power-

supply requirements of large screen LCD panels. The

step-up converter provides source voltages V_Sand the

step-down converter provides logic voltage for the sys-

tem. The dual charge pumps independently generate

adjustable regulated output voltages VGL and VGH to

bias the LCD. These four blocks operate with a fixed

switching frequency of 500kHz or 750kHz.

500kHz/750kHz Fixed Switching Frequency

V_SStep-Up Converter

Current Mode

1% Feedback Accuracy

Output Voltage Range up to 20V

3A Switch Current

Adjustable Soft Start

Adjustable Current Limit

V_LOGICStep-Down Converter

Current Mode

1% Feedback Accuracy

2.5A Switch Current

2.5ms Internal Soft Start

150mA Negative Charge Pump Driver for VGL

150mA Positive Charge Pump Driver for VGH

Integrated High Voltage Switch for Gate Volt-

age Shaping

Both step-up and step-down converters operate in

asynchronous switch mode. Current mode control pro-

vides fast transient response and eases loop stabiliza-

tion. Fault protection includes cycle-by-cycle current

limit, thermal shutdown, and output-fault shutdown.

High Voltage LDO for VREF

0.5% Feedback Accuracy

0.5V Dropout at 60mA Output Current

Current mode control is used for both charge pumps to

regulate its output voltage, which minimizes output

ripple and capacitor sizes. High voltage switch is used

for gate voltage shaping to improve TFT-LCD display

quality.

High-Speed Operational Amplifier

20MHz -3dB Bandwidth

45 V/µs Slew Rate

±200-mA Short-Circuit Current

Gate Drive Signal to Drive External MOSFET

XAO Comparator

Thermal Shutdown

Available in 7mmx7mm 48-pin TQFN Package

The G5562 includes one high-speed high-current op-

erational amplifier and one high-accuracy LDO for

Gamma buffer reference.

Applications

The G5562 is available in a 48-pin TQFN package.

LCD TV Panels

Ordering Information

ORDER

NUMBER

G5562R11U

TEMP.

RANGE

PACKAGE

(Green)

MARKING

5562

-40°C~ +85°C

TQFN7X7-48

Note: R1: TQFN7X7-48

1: Bonding Code

U: Tape & Reel

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.2

Mar 03, 2011

12 3 4

中文翻译

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G55C816P-4	CALMIRCO	获取价格	Microprocessor, 16-Bit, 4MHz, CMOS, PDIP40, PLASTIC, PDIP-40
G55C816P-5	CALMIRCO	获取价格	Microprocessor, 16-Bit, 5MHz, CMOS, PDIP40, PLASTIC, PDIP-40
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