APW7276 Datasheet, PDF (1/21 Pages) Anpec Electronics Coropration – PMIC for LCD Bias Power

APW7276
PMIC for LCD Bias Power
Features
• Input Voltage Range from 2.7V to 5.5V
• Positive & Negative Charge Pump for V_GH & V_GL
• High Performance Operation Amplifier
- +100mA Output Short Circuit Current
- 13V/µs Slew Rate
- 10MHz, -3dB Bandwidth
• Control Output for External P-MOSFET to Support
Completely Disconnecting the Battery
• Adjustable Power Sequence by External Capacitor
• Internal Soft-start
• Cycle By Cycle Current Limit
• Multiple Overload Protection
• Over Temperature Protection
• Available in TQFN3x3-20 Package
• Halogen and Lead Free Available (RoHS Compliant)
General Description
The APW7276 integrates with a high-performance step-
up converter, two charge pump controllers and one high
current operational amplifiers for TFT-LCD applications.
The main step-up regulator is a current-mode, fixed-fre-
quency PWM switching regulator. The 1.5MHz switching
frequency allows the usage of low-profile inductors and
ceramic capacitors to minimize the thickness of LCD panel
designs.The charge pump controllers provide regulated
the gate-driver of TFT-LCD V_GH and V_GL supplies.The am-
plifiers are ideal for V_COM applications, with 100mA
output short circuit current drive, 10MHz bandwidth, and
13V/µs slew rate. All inputs and outputs are rail-to-rail.
The APW7276 is available in a tiny 3mm x 3mm 20-pin
QFN package (TQFN3x3-20).
Applications
• Panel
Simplified Application Circuit ^{Pin Configuration}
Step-up
Converter
VCOM
GND 1
REF 2
FBN 3
GND 4
DRVN 5
GND
15 LX
14 EN
13 PS
12 POS
11 GND
Positive
Charge
Pump
Negative
Charge
Pump
= Thermal Pad (connected to GND plane
for better heat dissipation)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.3 - Jun., 2013
www.anpec.com.tw