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CAT4237 数据表(PDF) 5 Page - Catalyst Semiconductor

部件名 CAT4237
功能描述  High Voltage CMOS Boost White LED Driver
Download  13 Pages
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制造商  CATALYST [Catalyst Semiconductor]
网页  http://www.catalyst-semiconductor.com
标志 CATALYST - Catalyst Semiconductor

CAT4237 数据表(HTML) 5 Page - Catalyst Semiconductor

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CAT4237
© 2005 Catalyst Semiconductor, Inc.
5 of 13
Doc. No. 5013, Rev. A
Characteristics subject to change without notice
Typical Characteristics
VIN = 3.6V, CIN = 4.7uF, COUT = 0.22µF, L = 33µH with 8 LEDs at 20mA, TAMB=25ºC, unless otherwise specified.
Quiescent Current vs. VIN (Not Switching)
0
20
40
60
80
100
120
140
2.7
3.0
3.3
3.6
3.9
4.2
4.5
4.8
INPUT VOLTAGE [V]
VFB =0.4V
(not switching)
Quiescent Current vs. VIN (Switching)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLTAGE [V]
FB Pin Voltage vs. Supply Voltage
285
290
295
300
305
310
315
2.7
3.0
3.3
3.6
3.9
4.2
4.5
4.8
INPUT VOLTAGE [V]
8LEDs at 20mA
VOUT= 26V
FB Pin Voltage vs. Output Current
285
290
295
300
305
310
315
0
5
10
15
20
25
30
OUTPUT CURRENT [mA]
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]
Switching Waveforms


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