鈥?/div>
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
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鈥檚 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.
ORDERING INFORMATION
OZ962R
- 16 lead TSSOP
OZ962G
- 16-pin plastic SOP
TYPICAL APPLICATION CIRCUIT
VDD (+12V)
ENA
GND
CN1
U1
1
2
R9
R1
220K 200K C9
.01u
R2
10K
C2
R3
5.1K
0.1u
330p
C3
REF
VDD
OZ962G
15
RT
OVP
14
3
NC
CT
4
13
SCP
CLK
5
12
ADJ
ENA
6
11
FB
NDR
7
10
CMP
PDR
8
9
GND
SST
16
C8
0.22u
4
5,6
C5
220p
R7
100K
R6
30
SI4559EY
-
7,8
1.0K
2
Q1
1
C4
0.1u
R12
750
F1
1A Fast Fuse
+
-
C1
22u
25V
R5
10K
R10
100
3
U2
Q2
C6 2.2u
50V
+
R14
*
33T
*
2200T
C7
68p
3KV
3.5W
R11
1M
R4
15K
R8
0.5
R13
100
Figure 1. Typical Floating Secondary Application
Circuit
03/01/00
漏Copyright
1999 by O
2
Micro
OZ962-SF-2.7
All Rights Reserved
Page 1
U.S. Patent #5,619,402
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