LT1932 Linear Technology, LT1932 Datasheet - Page 11

• Manufacturer Part Number: LT1932
• Description: Constant-Current/ Constant-Voltage 1.4MHz Step-Up DC/DC Converter
• Manufacturer: Linear Technology

1.8V TO 3V
TYPICAL APPLICATIO S
1.8V TO 3V
V
V
IN
IN
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN EMK316BJ225
D1: ZETEX ZHCS400
L1: MURATA LQH3C4R7M24
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN LMK212BJ225
D1: ZETEX ZHCS400
L1: MURATA LQH3C4R7M24
DIMMING
CONTROL
DIMMING
CONTROL
2-Cell Driver for Three White LEDs
C1
4.7 F
2.5V DC
C1
4.7 F
2-Cell Driver for Two White LEDs
2.5V DC
60.4k
60.4k
5
5
SHDN
R
SHDN
R
V
V
SET
SET
IN
IN
6
4
6
4
R
1.50k
R
1.50k
4.7 H
LT1932
SET
LT1932
4.7 H
SET
L1
L1
GND
SW
GND
SW
LED
LED
U
1
2
1
2
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
3
D1
D1
3
15mA
15mA
1932 TA15a
1932 TA06a
C2
2.2 F
C2
2.2 F
85
80
75
70
65
60
55
85
80
75
70
65
60
55
0
0
5
5
LED CURRENT (mA)
LED CURRENT (mA)
Efficiency
Efficiency
10
10
V
V
V
IN
IN
V
IN
IN
15
= 1.8V
15
= 3V
= 3V
= 1.8V
1932 TA06b
1932 TA15b
20
20
LT1932
11