Datasheet

11
LT1932
TYPICAL APPLICATIO S
U
V
IN
SW
D1
15mA
1932 TA06a
L1
4.7µH
V
IN
1.8V TO 3V
LT1932
SHDN
C1: TAIYO YUDEN JMK212BJ475 [phone]
C2: TAIYO YUDEN EMK316BJ225 [phone]
D1: ZETEX ZHCS400 [phone]
L1: MURATA LQH3C4R7M24 [phone]
61
4
R
SET
1.50k
2.5V DC
DIMMING
CONTROL
C1
4.7µF
C2
2.2µF
60.4k
2
35
LED
R
SET
GND
2-Cell Driver for Three White LEDs Efficiency
LED CURRENT (mA)
0
55
EFFICIENCY (%)
60
65
70
75
80
85
5101520
1932 TA06b
V
IN
= 3V
V
IN
= 1.8V
2-Cell Driver for Two White LEDs
V
IN
SW
D1
15mA
1932 TA15a
L1
4.7µH
V
IN
1.8V TO 3V
LT1932
SHDN
C1: TAIYO YUDEN JMK212BJ475 [phone]
C2: TAIYO YUDEN LMK212BJ225 [phone]
D1: ZETEX ZHCS400 [phone]
L1: MURATA LQH3C4R7M24 [phone]
61
4
R
SET
1.50k
2.5V DC
DIMMING
CONTROL
C1
4.7µF
C2
2.2µF
60.4k
2
35
LED
R
SET
GND
LED CURRENT (mA)
0
EFFICIENCY (%)
55
60
65
70
75
80
85
10 20515
1932 TA15b
V
IN
= 3V
V
IN
= 1.8V
Efficiency