G2561 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Programmable Multi-Output TFT LCD Bias Power

Global Mixed-mode Technology
G2561
Programmable Multi-Output TFT LCD Bias Power
Features
„ Input Supply Range: 8V ~ 14V
„ Current Mode Sync-Boost Converter for AVDD
¾ Fixed 750kHz Switching Frequency
¾ 2.2A to 5A Programmable Current Limit
¾ 13.5V to 19.8V Programmable Output
¾ Integrated 20V/0.1Ω Switching N-MOSFET
„ Buck Converter for VLOGIC
¾ Fixed 750kHz Switching Frequency
¾ 2.2V to 3.7V Programmable Output
¾ Integrated 12V/0.2Ω Switching N-MOSFET
„ Positive Charge-Pump Regulator for VGH
¾ 20V to 35V Programmable Output
¾ Thermal Compensation
„ Negative Charge-Pump Regulator for VGL
¾ -4.5V to -13.5V Programmable Output
„ Built-in Power-On Sequence and Soft-Start
Function
„ Isolation Switching PMOS for AVDD
„ Protection Function
¾ Input Under Voltage Lockout (UVLO)
¾ Over-Temperature Protection (OTP)
¾ Over-Voltage Protection (OVP)
¾ Over-Current Protection (OCP)
¾ Output Under Voltage Protection (UVP)
¾ Short Circuit Protection (SCP)
„ 2-Wire I²C Slave Mode Interface
„ Available in QFN6X6-40 Package
Ordering Information
ORDER
NUMBER
G2561QG1U
Note: QG: QFN6X6-40
1: Bonding Code
U: Tape & Reel
Pin Configuration
MARKING
2561
Applications
„ TFT LCD Displays
General Description
The G2561 DC-DC converter provides regulated volt-
ages required by thin-film transistor (TFT) liquid crystal
displays (LCD) panels in QFN6X6-40 package. One
synchronous step-up converter, one asynchronous
step-down converter, and two charge pumps regulators
convert the 8V to 14V input voltage into four output
voltages with 1 channel OPAMP. These features com-
plete the power- supply requirements of large screen
LCD panels. The step-up converter provides source
voltages V_AVDD and the step-down converter provides
logic voltage V_LOGIC for the system. The dual charge
pumps regulators independently generate adjustable
regulated output voltages VGL and VGH to bias the
LCD using external charge pump attached to the
switching node. The step-up converter and step-down
converter operate with a fixed switching frequency of
750kHz, and all output are programmable.
The G2561 is available in a 40-pin QFN (6mm x 6mm)
package.
TEMP.
RANGE
-40°C to 85°C
PACKAGE
(Green)
QFN6X6-40
Ver: 0.1
Sep 09, 2013
VINB1 1
VINB1 2
AVIN 3
AGND 4
SDA 5
SCL 6
A0 7
HVS 8
XAO 9
COMP 10
Thermal
PPaadd
30 NEG
29 OP_OUT
28 OGND
27 NC
26 VFLK
25 A1
24 NC
23 DRVP
22 NC
21 DRVN
G2561 QFN6X6-40
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
TEL: [phone]
http://www.gmt.com.tw
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