參數(shù)資料
型號: MAX8722EEG
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 穩(wěn)壓器
英文描述: Low-Cost CCFL Backlight Controller
中文描述: FLUORESCENT LIGHT CONTROLLER, PDSO24
封裝: 0.150 INCH, 0.250 INCH PITCH, MO-137AE, QSOP-24
文件頁數(shù): 7/20頁
文件大小: 331K
代理商: MAX8722EEG
M
Low-Cost CCFL Bac klight Controller
_______________________________________________________________________________________
7
50% BRIGHTNESS DIGITAL
PWM OPERATION (V
CNTL
= 1V)
MAX8722 toc07
2ms/div
0VA
0VB
0V
C
0V
D
A: V
IFB
, 2V/div
B: V
VFB
, 2V/div
C: V
COMP
, 1V/div
D: V
DPWM
, 5V/div
DIGITAL PWM SOFT-START
MAX8722 toc08
40
μ
s/div
0VA
0VB
0V
C
0V
D
A: V
IFB
, 2V/div
B: V
VFB
, 2V/div
C: V
COMP
, 1V/div
D: V
DPWM
, 5V/div
DIGITAL PWM SOFT-STOP
MAX8722 toc09
40
μ
s/div
0VA
0VB
0V
C
0V
D
A: V
IFB
, 2V/div
B: V
VFB
, 2V/div
C: V
COMP
, 1V/div
D: V
DPWM
, 5V/div
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
M
INPUT VOLTAGE (V)
S
20
16
12
48
51
54
57
60
45
8
24
4ms/div
SECONDARY OVERCURRENT
PROTECTION AND TIMEOUT
0V
0V
MAX8722 toc11
A: V
ISEC
, 500mV/div
B: V
TFLT
, 2V/div
A
B
200ms/div
LAMP-OUT VOLTAGE LIMITING
AND TIMEOUT
0V
0V
0V
MAX8722 toc10
A: V
IFB
, 2V/div
B: V
VFB
, 2V/div
C: V
TFLT
, 5V/div
A
B
C
Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 1. V
BATT
= 12V, V
CC
= V
DD,
V
SHDN
= 5.3V, T
A
= +25
°
C, unless otherwise noted.)
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