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ETC - High-Efficiency Inverter Controller

Numéro de référence OZ962
Description High-Efficiency Inverter Controller
Fabricant ETC 
Logo ETC 





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OZ962 fiche technique
OZ962
High-Efficiency Inverter Controller
FEATURES
Single-stage power conversion, input voltage
range of 5V to 18V
Reduces the number of components and board
size by 30% compared with conventional design
Supports both floating and grounded secondary
designs
90% efficiency vs. typical 75% efficiency of
conventional designs
Internal open-lamp and short-circuit protections
Wide dimming range
Supports synchronization among multiple
inverter modules
Reliable 2 -winding transformer design,
eliminates arcing problems
Constant frequency, symmetrical, sinusoidal
drive
ORDERING INFORMATION
OZ962R - 16 lead TSSOP
OZ962G - 16-pin plastic SOP
GENERAL DESCRIPTION
The OZ962 is a unique high-efficiency, CCFL
backlight controller. It generates symmetrical,
near sinusoidal output voltage and current
waveforms for driving a CCFL backlight. The
OZ962 operates in a single, constant frequency,
pulse-width-modulation (PWM) mode. Typical
operating frequency ranges between 30 KHz to
100 KHz, depending on the CCFL and the
transformer’s characteristics.
Operating in a PWM push-pull manner, the
transformer in the OZ962 backlight inverter
requires only one primary winding and one
secondary winding, with the secondary winding
requiring no fold-back treatment.
The OZ962 is available in both 16-pin SOIC and
TSSOP packages. It is specified over the
commercial temperature range: 0 oC to +70 oC.
TYPICAL APPLICATION CIRCUIT
F1
VDD (+12V) 1A Fast Fuse
ENA
GND
CN1
R2
10K
R3
5.1K
+ C1
- 22u
25V
R1 R9
220K 200K C9
.01u
C2 C3
0.1u
330p
1
REF
U1
16
VDD
2 OZ962G 15
OVP
RT
3
NC
14
CT
4
SCP
13
CLK
5
ADJ
12
ENA
6
FB
11
NDR
7
CMP
10
PDR
8
GND
9
SST
R11 R4
1M 15K
R5
10K
C5
220p
C4
0.1u
R10
100
C8
0.22u
R7
100K
R6
30
3 U2
Q2 *
33T
4 C6 2.2u
5,6 50V
SI4559EY
-+
7,8
2
Q1
1
R8
0.5
R12
750
C7
* 68p
2200T 3KV
3.5W
R14
1.0K
R13
100
Figure 1. Typical Floating Secondary Application
Circuit
03/01/00
©Copyright 1999 by O2Micro
OZ962-SF -2.7
All Rights Reserved
Page 1
U.S. Patent #5,619,402

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