PT6937 Datasheet, PDF (10/15 Pages) Princeton Technology Corp – White LED Step-Up Converter

White LED Step-Up Converter
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URL: http://www.princeton.com.tw
PT6937
L1
22 H
D1
VIN
5V
CIN
1F
VDC
DIMMING
VIN
SW
90K
PT6937
5K
/SHDN FB
GND
R1
3
D1: FAIRCHILD 1N5819
L1: 3L Electronic Corp. SMTSDR322520C-220K
COUT
0.22 F
85%
80%
75%
70%
65%
60%
55%
50%
PTC PT6937 (7 LEDs)
2
5
10
15
LED CURRENT (mA)
5V to Seven White LEDs
VIN = 5V
PT6937 V1.1
- 10 -
March, 2006