MAX8759 Maxim Integrated Products, MAX8759 Datasheet - Page 7

• Manufacturer Part Number: MAX8759
• Description: CCFL Backlight Controller
• Manufacturer: Maxim Integrated Products

(Circuit of Figure 1, V
(SMBus MODE, BRIGHTNESS REGISTER = 0x80)
50% BRIGHTNESS DPWM OPERATION
A: VFB, 2V/div
B: COMP, 1V/div
A: V
B: COMP, 2V/div
A: VFB, 2V/div
B: LX1, 10V/div
Low-Cost, SMBus, CCFL Backlight Controller
LOW-INPUT VOLTAGE OPERATION
IN
, 10V/div
LINE TRANSIENT RESPONSE
(20V TO 8V)
(V
100µs/div
IN
2ms/div
10µs/div
_______________________________________________________________________________________
IN
= 8.0V)
= 12V, V
C: IFB, 2V/div
C: IFB, 2V/div
D: LX1, 20V/div
C: LX2, 10V/div
D:IFB, 2V/div
CC
MAX8759 toc07
MAX8759 toc04
MAX8759 toc01
= V
DD
C
A
B
A
B
C
D
C
D
A
B
, T
A
(SMBus MODE, BRIGHTNESS REGISTER = 0x00)
MINIMUM BRIGHTNESS STARTUP WAVEFORM
= +25°C, unless otherwise noted.)
A: VFB, 2V/div
B: LX1, 20V/div
A: VFB, 2V/div
B: COMP, 1V/div
A: VFB, 2V/div
B: COMP, 1V/div
HIGH-INPUT VOLTAGE OPERATION
DPWM SOFT-START
(V
IN
10µs/div
40µs/div
2ms/div
= 20.0V)
Typical Operating Characteristics
C: LX2, 20V/div
D: IFB, 2V/div
C: IFB, 2V/div
C: IFB, 2V/div
MAX8759 toc02
MAX8759 toc08
MAX8759 toc05
A
B
C
D
C
C
A
B
A
B
(SMBus MODE, BRIGHTNESS REGISTER = 0x00)
MINIMUM BRIGHTNESS DPWM OPERATION
A: V
B: COMP, 2V/div
A: VFB, 2V/div
B: COMP, 1V/div
A: VFB, 2V/div
B: COMP, 1V/div
IN
, 10V/div
LINE TRANSIENT RESPONSE
DPWM SOFT-STOP
(8V TO 20V)
100µs/div
2ms/div
40µs/div
C: IFB, 2V/div
D: LX1, 20V/div
C: IFB, 2V/div
C: IFB, 2V/div
MAX8759 toc03
MAX8759 toc06
MAX8759 toc09
C
A
B
C
D
A
B
C
A
B
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