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PDF OZ968G Data sheet ( 特性 )

部品番号 OZ968G
部品説明 SMBus Smart Inverter Controller
メーカ ETC
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OZ968G Datasheet, OZ968G PDF,ピン配置, 機能
OZ968
SMBus Smart Inverter Controller
FEATURES
GENERAL DESCRIPTION
Single-stage power conversion
Constant frequency design eliminates inter-
ference with LCDs
Built-in open-lamp protection and short-
circuit protection
Reliable 2-winding transformer design elimi-
nates arcing failures and the need for fold-
back wiring
32-level dimming and 256-level contrast
control via SMBus
High efficiency, 90% typical
Supports both floating secondary and
grounded secondary designs
ORDERING INFORMATION
OZ968G - 16-pin plastic SOP
The OZ968 is a unique single-stage, high-
efficiency, CCFL backlight controller. It drives a
zero-voltage-switching circuit and provides a
near sinusoidal output voltage and current wave-
forms for a CCFL backlight. Typical operating
frequency ranges from 30KHz to 100KHz. These
advances drive the OZ968 beyond comparable
conventional inverter designs with two power
conversion stages (one operates at a variable
frequency, the other at a constant frequency).
Operating in a PWM push-pull drive, the trans-
former in an OZ968 backlight inverter requires
only one primary winding and one secondary
winding. The secondary winding requires no fold-
back treatment.
The OZ968 supports a bi-directional, two-wire
bus, data transmission protocol to control dim-
ming (32 levels) and contrast (256 levels). Sup-
ply current is 1mA in active mode, 150µA in
standby mode.
TYPICAL APPLICATION CIRCUIT
20V
SMBCLCK
SMBDATA
ENABLE
5V
CONTRAST
C3
0.47u
1 FB
C2
2 CMP
0.1u
3 SST
4 ADJ
OZ968
VDD 16
SCP 15
VSEQ 14
SMBD 13
C5
0.1u
5 CNT
SMBC 12
R2
120k
C4
220p
6 RT
7 CT
8 GND
OVP 11
PDR 10
NDR 9
R8
10k
The OZ968 is available in a 16-pin SOP pack-
age. It is specified over the commercial tempera-
ture range 0oC to +70oC.
C1
47u/
25v
R3
3.3k
Q4
3904
1:40
C6
22p/3KV
R6
2.2k
Q5
3904
R4
200k
Q3
3906
Q2
Si4559EY/P
C7
4.7u
D1
1N4148
Q1
Si4559EY/
N
R5 R7
10k
0.1ohm
R10
100k
CCFL
D2
1N4148
R9
1k
Figure 1. Typical Application Circuit
06/15/00
Copyright 1999 by O2Micro
OZ968-SF-1.5
All Rights Reserved
Page 1
U.S. Patent #5,619,402

1 Page





OZ968G pdf, ピン配列
PIN CONFIGURATION
OZ968
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
FB
CMP
SST
ADJ
CNT
RT
CT
GND
NDR
PDR
OVP
SMBC
SMBD
VSEQ
SCP
VDD
Description
Current sense feedback.
Compensation for the current sense feedback.
Soft start in two steps. Two-interval current sources of 50µA and 0.6µA
provide 1:26.6 ratio between the two time intervals of soft start. Connect a
capacitor between this pin and the ground to adjust the soft-start timing.
The output of the brightness D/A converter. The brightness has 32 adjust-
able levels. The default range is between 0.9V to 2.5V.
The output of the contrast D/A converter. The contrast has 256 levels from
0.8V to 2.8 V (8mV per step). This output has a current capability of up to
2mA.
Timing resistor.
Timing capacitor. CT and RT set the clock frequency. Fs = 1.60 / (RT * CT).
Ground.
Gate drive output for the N-MOSFET.
Gate drive output for the P-MOSFET.
Over-voltage protection sense input.
SMBus Clock Input/Output
SMBus Data Input/Output.
Vee power sequence input.
Short-circuit protection sense input.
Supply voltage input.
ABSOLUTE MAXIMUM RATINGS
VDD
GND
Storage temp.
Operating temp.
Operating junction temp.
7.0 V
+/- 0.3 V
-55 to 150 oC
0 to 70 oC
150 oC
Logic inputs
RECOMMENDED OPERATING RANGE
VDD
Fosc
4.75 V to 5.25 V
30 KHz to 100 KHz
Rt 50 K to 150 K
-0.3 V to VDD+0.3 V
OZ968-SF-1.5
Page 3


3Pages


OZ968G 電子部品, 半導体
PACKAGE INFORMATION
SOP-16
PACKAGE
EH
D
Be
AD
A1
L
OZ968
DIM
INCHES
MILLIMETERS
MIN MAX MIN MAX
A 0.0532 0.0688 1.35 1.75
A1 0.0040 0.0098 0.10 0.25
B 0.013 0.020 0.33 0.51
C 0.0075 0.0098 0.19 0.25
D 0.3859 0.3937 9.80 10.00
E 0.1497 0.1574 3.80 4.00
e 0.050 BCS. 1.27 BCS.
H 0.2284 0.2440 5.80 6.20
L 0.016 0.050 0.40 1.27
α 0° 8° 0° 8°
C
OZ968-SF-1.5
Page 6

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