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Global Mixed-mode Technology
G1572
Programmable 14+1 Channel Voltage Buffers with
NVM for TFT LCD
Features
„ Supply Operation Range : 6.5V to 18V
„ 14+1 Channels :
---14 Channel Rail-to-Rail Programmable
Gamma Buffers
Š 10 bits Resolution for each Channel
Š 25mA Output Current for each Channel
Š 2 Banks Registers Using Bank_Sel to Select
which Bank Data Output
---1 Channel Rail-to-Rail Vcom Buffer:
Š 7 Bits Adjustable Output
Š ±100mA Output Current
Š ±260mA Output Short-Circuit Current
Š 20V/μs Slew Rate
„ 2-Wire I2C Slave Mode Interface
„ Using One Control Pin Enable to Store Data into
Non-Volatile Memory (NVM)
„ Non-Volatile Memory (NVM) Store Setting (at
Least 100 Re-Write Times)
„ QFN5X5-32 Package
Ordering Information
ORDER
NUMBER
G1572QA1U
Note: QA:QFN5X5-32
1: Bonding Code
U: Tape & reel
MARKING
1572
Pin Configuration
Applications
„ TFT-LCD Monitors
„ LCD Televisions
General Description
The G1572 consists of 14+1 channel buffers target
toward the needs of thin film transistor liquid crystal
display (TFT LCD). This device incorporates one
Vcom buffer and 14 gamma buffers, and are pro-
grammed through I2C interface. It contains two register
banks which can store two different sets of gamma
reference values. Each buffer is capable of driving
heavy capacitive loads and offering large current load-
ing (Vcom: 100mA, Gammas: 25mA).
The G1572 is available in the QFN5X5-32 package.
TEMP.
RANGE
-40°C to 85°C
PACKAGE
(Green)
QFN5X5-32
Typical Application Circuit
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
AVDD
1
2
3
4
5
6
7
8
Thermal
Pad
24 OUT14
23 OUT13
22 OUT12
21 OUT11
20 OUT10
19 OUT9
18 OUT8
17 DVDD
G1572 QFN5X5-32
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
200Ω
AVDD
10µF
AVDD
10µF
DVDD
10µF
SCL 4.7kΩ
3.3V
SDA 4.7kΩ
3.3V
nWR 4.7kΩ
3.3V
0.1µF
24.9kΩ
A0
STATIC_Hi OUT1
AVDD
DVDD
OUT14
10Ω
10Ω
0.1µF
to Source
Driver
0.1µF
SCL
SDA
BANK_SEL
VCOM_FB
VCOM_OUT
From T-CON
* 10Ω
AVDD
10µF
nWR
200kΩ
SET VCOM_ADJ
AGND DGND 243kΩ
* optional
Ver: 0.1
Aug 06, 2012
TEL: 886-3-5788833
http://www.gmt.com.tw
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