TA9687GN Просмотр технического описания (PDF) - O2Micro International
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TA9687GN Datasheet PDF : 14 Pages
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ta9687
LCDM Inverter Controller
FEATURES
• Constant operating frequency
• Drives positive/negative-impedance lamps
during ignition
• High drive current for external MOSFETs
• User-defined ignition time and shutdown
delay time
• Built-in intelligence for ignition and normal
operation of CCFLs
• Built-in open-lamp protection and over-
voltage protection for backlight system
• Optimized soft-start function
ORDERING INFORMATION
Part Number
ta9687GN
Temp Range
-20oC to +85oC
Note(3), page 3
Package
16-pin SOP
Lead-Free
GENERAL DESCRIPTION
ta9687 is a high performance, cost-effective
CCFL (Cold Cathode Fluorescent Lamp)
controller designed for driving large-size Liquid
Crystal Display (LCD) applications requiring 2 to
6 CCFLs.
The controller converts unregulated DC voltages
into a nearly sinusoidal lamp voltage and current
waveforms.
The ta9687 supports full-bridge power conversion
topologies while maintaining high-efficiency
operation. The controller provides a soft-start
operation, current and voltage regulation, over-
voltage and over-current protection, high drive
capability.
The control logic provides a regulated ignition
voltage and appropriate protection features for
over-voltage or over-current conditions.
The ta9687 offers a high level of integration,
while maintaining flexibility and high-efficiency
operation that reduces external component
heating, resulting in higher reliability and longer
CCFL life. The proprietary design technique
provides a simple, low-cost system solution.
PIN DIAGRAM
1 VSEN
2
SSTCMP
3 CT
4 RT1
5
GNDA
6 PDR2
7 GNDP
8
NDR2
ENA 16
15
OVPT
ISEN 14
PWM 13
12
TIMER
VDDA 11
PDR1 10
9
NDR1
SIMPLIFIED APPLICATION
CIRCUIT
VIN
GND
ENA
PWM
VDDA
8 NDR2
NDR1 9
T22
7 GNDP
PDR1 10
6 PDR2
VDDA 11
C25
5 GNDA
TIMER 12
1u
4 RT1
PWM 13
3
CT
14
ISEN
2 SSTCMP
OVPT 15
1 VSEN
ENA 16
Q5
4/14/2008
ta9687-DS-1.0 - TPV
Page 1
Copyright © 2007-2008 by O2Micro
All Rights Reserved
CONFIDENTIAL
Patent # 6,259,615; 6,396,722; 6,804,129; 6,897,698; 7,151,394; 7,026,860; 6,559,606; 6,856,519;
7,120,035; 6,900,993; 6,809,938 and others pending
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