參數(shù)資料
型號(hào): DS3994
廠商: Maxim Integrated Products, Inc.
英文描述: 4-Channel Cold-Cathode Fluorescent Lamp Controller
中文描述: 4通道冷陰極熒光燈控制器
文件頁數(shù): 5/28頁
文件大?。?/td> 557K
代理商: DS3994
D
4-Channel Cold-Cathode
Fluorescent Lamp Controller
_____________________________________________________________________
5
ACTIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
D
SUPPLY VOLTAGE (V)
S
5.3
5.1
4.9
4.7
6
7
8
9
10
5
4.5
5.5
4
DPWM = 10%
DPWM = 50%
DPWM = 100%
GATE Q
C
= 3.5nC
SVM < 2V
f
LF:OSC
= 64kHz
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE
D
TEMPERATURE (
°
C)
S
22.5
6.5
7.0
7.5
8.0
9.0
8.5
9.5
10.0
10.5
11.0
6.0
-40.0
85.0
V
CC
= 5.5V
V
CC
= 5.0V
DPWM = 100%
f
LF:OSC
= 64kHz
GATE Q
C
= 3.5nC
V
CC
= 4.5V
INTERNAL FREQUENCY CHANGE
vs. TEMPERATURE
D
TEMPERATURE (
°
C)
F
22.5
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
-0.6
-0.8
-1.0
-40.0
85.0
LAMP FREQUENCY
DPWM FREQUENCY
TYPICAL OPERATION AT 12V
D
10
μ
s
5.0V G
A
10
μ
s
5.0V G
B
10
μ
s
2.0V LCM
10
μ
s
2.0V OVD
BURST DIMMING AT 150Hz AND 10%
D
1ms
5.0V G
A
1ms
5.0V G
B
1ms
2.0V LCM
1ms
2.0V OVD
TYPICAL OPERATION AT 15V
D
10
μ
s
5.0V G
A
10
μ
s
5.0V G
B
10
μ
s
2.0V LCM
10
μ
s
2.0V OVD
TYPICAL OPERATION AT 18V
D
10
μ
s
5.0V G
A
10
μ
s
5.0V G
B
10
μ
s
2.0V LCM
10
μ
s
2.0V OVD
TYPICAL STARTUP WITH SVM
D
5ms
2.0V SVM
5ms
5.0V G
B
5ms
2.0V LCM
5ms
1.0V OVD
Typical Operating Characteristics
(V
CC
= +5.0V, T
A
= +25
°
C, unless otherwise noted.)
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