MAX8722 Maxim Integrated Products, MAX8722 Datasheet - Page 5

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

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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
Note 1: Specifications to -40°C are guaranteed by design based on final characterization results.
Current-Limit Threshold
LX1 - PGND, LX2 - PGND
(Adjustable)
Zero-Current Crossing Threshold
LX1 - GND, LX2 - GND
Current-Limit Leading Edge
Blanking
IFB Input Voltage Range
IFB Regulation Point
IFB Input Bias Current
IFB Lamp-Out Threshold
IFB to COMP Transconductance
COMP Output Impedance
ISEC Overcurrent Threshold
VFB Overvoltage Threshold
DPWM Chopping Frequency
DPWM Input Low Voltage
DPWM Input High Voltage
DPWM Output Low Resistance
DPWM Output High Resistance
SYNC Input Low Voltage
SYNC Input High Voltage
SYNC Input Bias Current
SYNC Input Frequency Range
CNTL Minimum Duty-Cycle
Threshold
CNTL Maximum Duty-Cycle
Threshold
SHDN Input Low Voltage
SHDN Input High Voltage
FREQ Dual-Mode Input High
Level
TFLT Trip Threshold
PARAMETER
_______________________________________________________________________________________
BATT
= 12V, V
Low-Cost CCFL Backlight Controller
CC
V
V
0 < V
-2V < V
0.5V < V
R
SYNC = V
SYNC = V
SYNC = GND, FREQ = V
SYNC = V
V
ILIM
ILIM
SYNC
FREQ
= V
DD
IFB
= 0.5V
= 2.0V
= 169k
= 2V
IFB
, V
COMP
< 2V
CC
CC
CC
SHDN
< 0
, R
, R
, FREQ = V
< 4V
FREQ
FREQ
= 5.3V, T
= 169k
= 169k
CONDITIONS
CC
CC
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
V
-150
1.15
0.20
0.35
3.95
MIN
370
240
770
560
200
-0.3
2.2
2.1
2.1
1.9
2.1
CC
80
60
10
-2
-2
1
7
-
TYP
MAX
+0.3
1.28
0.26
4.20
120
430
460
810
640
160
218
2.4
0.8
2.4
2.4
0.8
2.1
0.8
+2
+2
12
18
50
UNITS
kHz
M
mV
mV
mV
mV
k
k
µA
µS
Hz
µA
ns
V
V
V
V
V
V
V
V
V
V
V
V
V
5