MAX8751ETJ-T Maxim Integrated Products, MAX8751ETJ-T Datasheet - Page 8

• Manufacturer Part Number: MAX8751ETJ-T
• Description: Display Drivers Fixed-Frequency Full -Bridge CCFL Inverte
• Manufacturer: Maxim Integrated Products

Fixed-Frequency, Full-Bridge CCFL
Inverter Controller
(Circuit of Figure 1. V
8
_______________________________________________________________________________________
75
70
65
60
55
50
45
40
75
A: COMP, 1V/div
B: IFB, 1V/div
C: VFB, 1V/div
SWITCHING FREQUENCY vs. R
85
DPWM SOFT-START
95
IN
R
100µs/div
5.40
5.38
5.36
5.34
5.32
5.30
HF
105
= 12V, T
(kΩ)
4
115
A
V
= +25°C, unless otherwise noted.)
125
10
MAX8751 toc07
CC
HF
LINE REGULATION
135
V
IN
A
B
C
16
(V)
Typical Operating Characteristics (continued)
350
320
290
260
230
200
22
80
A: COMP, 5V/div
B: VFB, 2V/div
C: TFLT, 5V/div
LAMP-OUT VOLTAGE LIMITING
DPWM FREQUENCY vs. R
28
100
AND TIMEOUT
R
400ms/div
LF
120
(kΩ)
5.40
5.38
5.36
5.34
5.32
5.30
140
LF
MAX8751 toc08
0
160
4
V
C
A
B
CC
LINE REGULATION
8
350
320
290
260
230
200
V
IN
100
(V)
A: ISEC, 2V/div
B: COMP, 2V/div
C: TFLT, 5V/div
12
RMS LAMP CURRENT vs. R
SECONDARY SHORT-CIRCUIT
PROTECTOR AND TIMEOUT
130
16
R
10ms/div
SENSE
20
160
(Ω)
190
SENSE
MAX8751 toc09
220
A
B
C