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CAT32 Datasheet(PDF) 10 Page - Catalyst Semiconductor

Part # CAT32
Description  CMOS White LED Driver
PDF  14 Pages
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Manufacturer  CATALYST [Catalyst Semiconductor]
Direct Link  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT32 Datasheet(HTML) 10 Page - Catalyst Semiconductor

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CAT32
Doc. No. MD-5001 Rev. AD
10
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
TYPICAL APPLICATION CIRCUITS
The application diagrams below are shown for the TSOT-23 packages.
Two LEDs with DC Level Dimming Control
Three LEDs with DC Level Dimming Control
Efficiency - Three LEDs
Four LEDs with PWM Dimming Control
15mA
4
RSET
1.50kΩ
L1
6.8µH
2
3
1
6
5
SW
VIN
SHDN
RSET
D1
C2
1µF
C1
4.7µF
VIN
PWM
DIMMING
CONTROL
CAT32
LED
GND
Efficiency - Four LEDs
LED CURRENT [mA]
60
65
70
75
80
85
0
5
10
15
20
VIN = 4.2V
VIN =3.0V
LED CURRENT [mA]
60
65
70
75
80
85
0
5
10
15
20
VIN =4.2V
VIN =3.0V
2.5V DC
DIMMING
CONTROL
15mA
4
RSET
1.50kΩ
60.40kΩ
L1
6.8µH
2
3
1
6
5
SW
VIN
SHDN
RSET
D1
C2
1µF
C1
4.7µF
VIN
CAT32
LED
GND
2.5V DC
DIMMING
CONTROL
15mA
4
RSET
1.50kΩ
60.40kΩ
L1
6.8µH
2
3
1
6
5
SW
VIN
SHDN
RSET
D1
C2
2.2µF
C1
4.7µF
VIN
CAT32
LED
GND



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