MAX8722 Maxim Integrated Products, MAX8722 Datasheet - Page 6

• Manufacturer Part Number: MAX8722
• Description: Low-Cost CCFL Backlight Controller
• Manufacturer: Maxim Integrated Products

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Low-Cost CCFL Backlight Controller
(Circuit of Figure 1. V
6
_______________________________________________________________________________________
A: V
B: V
A: V
B: V
LINE-TRANSIENT RESPONSE
OPERATION (V
VFB
IFB
IFB
VFB
LOW INPUT-VOLTAGE
, 2V/div
, 2V/div
, 2V/div
, 2V/div
20µs/div
10µs/div
BATT
BATT
C: V
D: V
C: V
D: V
LX1
LX2
LX1
BATT
= 12V, V
= 8V)
, 10V/div
, 10V/div
, 10V/div
, 10V/div
MAX8722 toc01
MAX8722 toc04
CC
= V
0V A
0V B
0V
0V
0V A
0V B
0V
20V
10V
0V
C
D
C
D
DD,
V
SHDN
MINIMUM BRIGHTNESS STARTUP
A: V
B: V
A: V
B: V
= 5.3V, T
OPERATION (V
WAVEFORM (V
IFB
VFB
HIGH INPUT-VOLTAGE
IFB
VFB
, 2V/div
, 2V/div
, 2V/div
, 2V/div
10µs/div
A
2ms/div
= +25°C, unless otherwise noted.)
BATT
CNTL
C: V
D: V
C: V
D: V
LX1
LX2
= 20V)
COMP
SHDN
Typical Operating Characteristics
= 0V)
, 10V/div
, 10V/div
, 5V/div
, 1V/div
MAX8722 toc02
MAX8722 toc05
0V A
0V B
0V
0V
0V A
0V B
0V
0V
C
D
C
D
MINIMUM BRIGHTNESS DIGITAL
PWM OPERATION (V
A: V
B: V
LINE-TRANSIENT RESPONSE
A: V
B: V
VFB
IFB
IFB
VFB
, 2V/div
, 2V/div
, 2V/div
, 2V/div
20µs/div
2ms/div
C: V
D: V
C: V
D: V
CNTL
LX1
BATT
COMP
DPWM
, 10V/div
, 10V/div
= 0V)
, 1V/div
, 5V/div
MAX8722 toc03
MAX8722 toc06
0V A
0V B
0V
20V
10V
0V
0V A
0V B
0V
0V
C
C
D
D