參數(shù)資料
型號(hào): CAT4237
英文描述: High Voltage CMOS Boost White LED Driver
中文描述: 高電壓的CMOS升壓白光LED驅(qū)動(dòng)器
文件頁(yè)數(shù): 5/13頁(yè)
文件大?。?/td> 533K
代理商: CAT4237
CAT4237
2005 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5 of 13
Doc. No. 5013, Rev. A
Typical Characteristics
V
IN
= 3.6V, C
IN
= 4.7uF, C
OUT
= 0.22μF, L = 33μH with 8 LEDs at 20mA, T
AMB
=25oC, unless otherwise specified.
Quiescent Current vs. VIN (Not Switching)
0
20
40
60
80
100
120
140
2.7
3.0
3.3
INPUT VOLTAGE [V]
3.6
3.9
4.2
4.5
4.8
I
VFB =0.4V
(not switching)
Quiescent Current vs. VIN (Switching)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
INPUT VOLTAGE [V]
3.5
4.0
4.5
5.0
S
FB Pin Voltage vs. Supply Voltage
285
290
295
300
305
310
315
2.7
3.0
3.3
INPUT VOLTAGE [V]
3.6
3.9
4.2
4.5
4.8
F
8LEDs at 20mA
VOUT= 26V
FB Pin Voltage vs. Output Current
285
290
295
300
305
310
315
0
5
OUTPUT CURRENT [mA]
10
15
20
25
30
F
8 LEDs
Switching Frequency vs. Supply Voltage
960
980
1000
1020
1040
2.7
3.0
3.3
3.6
3.9
4.2
4.5
4.8
INPUT VOLTAGE [V]
F
Switching Waveforms
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