LT1932 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1932' PDF : 16 Pages View PDF
LT1932
TYPICAL APPLICATIO
Li-Ion Driver for Ten White LEDs
VIN
2.7V TO 4.2V
L1
10µH
D1
C1
4.7µF
6
1
VIN
SW
LT1932
5
SHDN
3
LED
RSET
GND
4
2
RSET
750Ω
100Ω
30mA
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN TMK325BJ475
D1: ZETEX ZHCS400
L1: MURATA LQH3C100M24
(408) 573-4150
(408) 573-4150
(631) 543-7100
(814) 237-1431
100Ω
C2
4.7µF
1932 TA16a
VIN
2.7V TO 4.2V
Li-Ion Driver for Six White LEDs
L1
4.7µH
D1
C1
4.7µF
3.3V DC
DIMMING
CONTROL
6
1
VIN
SW
LT1932
5
SHDN
3
LED
RSET
GND
80.6k 4
2
RSET
1.50k
15mA
C1: TAIYO YUDEN JMK212BJ475
C2: TAIYO YUDEN TMK316BJ105
D1: ZETEX ZHCS400
L1: MURATA LQH3C4R7M24
(408) 573-4150
(408) 573-4150
(631) 543-7100
(814) 237-1431
C2
1µF
1932 TA12a
Efficiency
80
VIN = 4.2V
75
VIN = 2.7V
70
65
60
55
50
0
5 10 15 20 25 30
TOTAL LED CURRENT (mA)
1932 TA16b
Efficiency
85
80
VIN = 4.2V
75
VIN = 2.7V
70
65
60
55
0
5
10
15
20
LED CURRENT (mA)
1932 TA12b
RELATED PARTS
PART NUMBER
LT1615
LT1617
LT1618
LTC1682
LT1930
LT1931
LTC3200
LTC3201
LTC3202
DESCRIPTION
Micropower DC/DC Converter in 5-Lead ThinSOT
Micropower Inverting DC/DC Converter in 5-Lead ThinSOT
Constant-Current/Constant-Voltage DC/DC Converter
Doubler Charge Pump with Low Noise Linear Regulator
1.4MHz Switching Regulator in 5-Lead ThinSOT
Inverting 1.2MHz Switching Regulator in 5-Lead ThinSOT
Low Noise Regulated Charge Pump
Ultralow Noise, Charge Pump
High Efficiency, Fractional Charge Pump
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q www.linear.com
COMMENTS
20V at 12mA from 2.5V Input, ThinSOT Package
–15V at 12mA from 2.5V Input, ThinSOT Package
Drives 20 White LEDs from Li-Ion, MS10 Package
3.3V and 5V Outputs with 60µVRMS Noise, Up to 80mA Output
5V at 480mA from 3.3V Input, ThinSOT Package
– 5V at 350mA from 5V Input, ThinSOT Package
5V Output with Up to 100mA Output
100mA, Integrated LP Filter, MSOP8
125mA, Integrated 2-Bit DAC
1932f
LT/TP 1201 2K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001
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