參數(shù)資料
型號(hào)： MAX1739
廠商： Maxim Integrated Products, Inc.
英文描述： Wide Brightness Range CCFL Backlight Controllers
中文描述： 寬亮度范圍CCFL背光控制器
文件頁(yè)數(shù)： 2/26頁(yè)
文件大?。?/td> 444K
代理商： MAX1739
M
Wide Brightness Range
CCFL Backlight Controllers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V
BATT
to GND ...........................................................-0.3V to 30V
V
BST
, V
SYNC
to GND.................................................-0.3V to 34V
V
BST
to V
LX
.................................................................-0.3V to 6V
V
DH
to V
LX
.................................................-0.3V to (V
BST
+ 0.3V)
V
LX
to GND...................................................-6V to (V
BST
+ 0.3V)
VL to GND...................................................................-0.3V to 6V
V
CCV
, V
CCI
, V
REF
, V
DL1
, V
DL2
to GND .........-0.3V to (VL + 0.3V)
V
MINDAC
, V
CTFB
, V
CSAV
to GND ................................-0.3V to 6V
V
CS
to GND...................................................-0.6V to (VL + 0.3V)
ELECTRICAL CHARACTERISTICS
(V+ = 8.2V, V
SH
/SUS = V
SH
= 5.5V, MINDAC = GND,
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25
°
C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
MODE
to GND.............................................................-6V to 12V
V
CRF/SDA
, V
CRF
, V
CTL/SCL
, V
CTL
, V
SH
/SUS
,
V
SH
to GND............................................................-0.3V to 6V
Continuous Power Dissipation (T
A
= +70
°
C)
20-Pin QSOP (derate 9.1mW/
°
C above +70
°
C)...........727mW
Operating Temperature.......................................-40
°
C to +85
°
C
Storage Temperature.........................................-65
°
C to +150
°
C
Lead Temperature (soldering, 10s).................................+300
°
C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SUPPLY AND REFERENCE
V
L
= V
BATT
V
L
= open
4.6
6
5.5
28
6
6
20
5.5
5.5
4.6
V
BATT
Input Voltage Range
V
V
BATT
= 28V
V
BATT
= V
L
= 5V
3.2
3.2
6
5.35
4.5
V
BATT
Quiescent Current, Operation
with Full Duty Cycle on DH
DH = DL1 = DL2 = open
mA
V
BATT
Quiescent Current, Shutdown
VL Output Voltage, Normal Operation
VL Output Voltage, Shutdown
SH
/SUS =
SH
= GND
6V < V
BATT
< 28V, 0 < I
LOAD
< 15mA
SH
/SUS =
SH
= GND, no load
VL rising (leaving lockout)
VL falling (entering lockout)
μ
A
V
V
5.0
3.5
VL Undervoltage Lockout Threshold
4.0
V
VL Undervoltage Lockout Hysteresis
300
mV
REF Output Voltage, Normal
Operation
4.5V < VL < 5.5V, I
REF
= 40
μ
A
1.96
2.00
2.04
V
V
L
POR Threshold
SWITCHING REGULATOR
DH Driver On-Resistance
DL1, DL2 Driver On-Resistance
Minimum DH Switching Frequency
DH Minimum Off-Time
DH Maximum Duty Cycle
SYNC Synchronization Range
SYNC Input Current
SYNC Input Threshold
SYNC Input Hysteresis
SYNC Threshold Crossing to DL1,
DL2 Toggle Delay
CS Overcurrent Threshold
0.9
2.7
V
18
18
64
500
1/t
DH
, SYNC = CS or GND, not synchronized
49
250
56
375
98
kHz
ns
%
kHz
μ
A
mV
mV
Detect falling edges on SYNC
0 < V
SYNC
< 30V
SYNC falling, referred to CS
Referred to the SYNC input threshold
V
SYNC
= 0 to 5V, C
DL_1
and
C
DL_2
< 100pF,
50% point on SYNC to 50% point on DL1 or DL2
64
-2
400
50
200
2
600
150
500
100
120
ns
408
450
492
mV
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