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OZ962 데이터시트 PDF




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부품번호 OZ962 기능
기능 High-Efficiency Inverter Controller
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OZ962 데이터시트, 핀배열, 회로
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




OZ962 pdf, 반도체, 판매, 대치품
OZ962
FUNCTIONAL SPECIFICATIONS
Parameter
Reference Voltage
Nominal voltage
Line regulation
Load regulation
Oscillator
Initial accuracy
Ramp peak
Ramp valley
Temp. stability
Error Amplifier
Input bias current
Input offset voltage
Input voltage range
Open loop voltage gain
Unity gain bandwidth
Power supply rejection
Under-Voltage Lockout
Positive-going threshold voltage
Negative-going threshold voltage
Supply
Supply current - Enable Low
Adj, CT = Open
Supply current - Enable Low
Adj, CT = Open
Supply current - Enable High
Supply current - Enable High
NDR output
Output high voltage
Output low voltage
Output resistance
PDR output
Output high voltage
Output low voltage
Output resistance
Break -Before-M a k e
Qn off to Qp on delay
Qp off to Qn on delay
Symbol
Test Conditions
5 V < VDD < 15 V
Limits
Min Typ Max
Unit
Vref
Iload = 0.25 mA,
VDD = 5 V
2.37 2.50 2.63
V
- 8 - mV/V
Iload = 0.2 mA to 1.0 mA
-
1
- mV/mA
fosc
Ct = 220 pF, Rt = 120 k
48
53
58 KHz
2.45 2.55 2.65
V
TA = 0 oC to 70 oC
0.40 0.45 0.50
V
- - 200 ppm/ oC
VADJ=VFB=2.0 V
VFB = 4.0 V
- 25 500 nA
- 5 10 mV
0 - VDD- V
1.5
50 60
-
dB
1 1.5 - MHz
50 60
-
dB
- 3.8
3.4 3.6
4
-
V
V
IOFF
IOFF
ION
ION
V OH
V OL
ROUT
V OH
V OL
ROUT
THL
TLH
VDD = 5.0 V
VDD = 15 V
VDD = 5.0 V
VDD = 15 V
Isink = 10 mA,
VDD < 7.8 V
VDD >7.8 V
Isource = 10 mA
VDD = 5.0 V
Isink = 10 mA
Isource = 10 mA,
VDD < 7.8 V
VDD > 7.8 V
VDD = 5.0 V
- 25 120 µA
- 25 120 µA
- 0.6 1.5 mA
- 0.6 1.5 mA
VDD-
0.3
7.0
-
-
VDD-
0.5
8.0
0.3
50
-
9.0
0.8
80
V
V
V
VDD-
0.6
0.4
VDD-
0.3
0.5
-
0.8
V
V
- VDD- VDD-
6.0 4.0
- 50 80
200 240 280
220 260 300
ns
ns
OZ962-SF -2.7
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