CAT37EKK-TE7 查看數據表（PDF） - Catalyst Semiconductor => Onsemi
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CAT37EKK-TE7 Datasheet PDF : 13 Pages
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CAT37
TYPICAL APPLICATION CIRCUITS
The application diagrams are shown for the SOT23 pin numbers.
Two LEDs with DC Level Dimming Control
Efficiency - Two LEDs
VIN
3 V to 4.2 V
D1
5
1 VDC
VIN
SW Dimming
CAT37
18k
4 SHDN
3
1k
FB
GND
2
15mA
90
85
80
75
70
65
60
0
VVIINN = 3..66VV
VVIN == 33..00VV
5 10 15 20 25 30
LED CURRENT [mA]
Three LEDs with DC Level Dimming Control
VIN
3 V to 4.2 V
D1
5
1 VDC
VIN
SW Dimming
CAT37
18k
1k
4 SHDN
3
FB
GND
2
15mA
Efficiency - Three LEDs
90
85
80
75
70
65
60
0
VVININ==33.6.6VV
VIN =VI3N.0=3V.0V
5 10 15 20 25 30
LED CURRENT [mA]
Four LEDs with PWM Dimming Control
VIN
3 V to 4.2 V
D1
PWM
5
1 10k
VIN
SW
CAT37
18k
4 SHDN
3
1k
FB
GND
2
15mA
Efficiency - Four LEDs
90
85
80
75
70
65
60
0
VVININ==33..66VV
VVIINN=33.0.0VV
5
10 15 20
25 30
LED CURRENT [mA]
9
Doc No. 5005, Rev. R
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