Datasheet

LT3758/LT3758A
36
3758afd
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2009
LT 0712 REV D • PRINTED IN USA
typicAl ApplicAtions
relAteD pArts
8V to 72V Input, 12V Output SEPIC Converter
SENSE
LT3758
V
IN
V
IN
8V TO 72V
C
IN
2.2µF
100V
X7R
×2
C
DC
2.2µF
100V
X7R, ×2
V
OUT
12V
2A
0.012Ω
M1
Si7456DP
41.2k
300kHz
GATE
FBX
GND
INTV
CC
SHDN/UVLO
SYNC
RT
SS
•
•
154k
32.4k
0.47µF
10nF
10k
L1A
L1B
D1
MBRS3100T3G
3758 TA08a
105k
1%
15.8k
1%
C
OUT2
10µF
16V
X5R
×4
C
OUT1
47µF
20V
×2
C
VCC
4.7µF
10V
X5R
L1A, L1B: COILTRONICS DRQ127-220
+
V
C
Efficiency vs Output Current
V
IN
= 8V
OUTPUT CURRENT (A)
10
EFFICIENCY (%)
30
20
40
50
60
70
80
90
100
3758 TA08b
0.001 0.01 0.1 1 10
V
IN
= 72V
V
IN
= 42V
PART NUMBER DESCRIPTION COMMENTS
LT3757A Boost, Flyback, SEPIC and Inverting Controller 2.9V ≤ V
IN
≤ 40V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, 3mm × 3mm DFN-10 and MSOP-10E Packages
LT3759 Boost, SEPIC and Inverting Controller 1.6V ≤ V
IN
≤ 42V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, MSOP-12E Packages
LT3957A Boost, Flyback, SEPIC and Inverting Controller
with 5A, 40V Switch
3V ≤ V
IN
≤ 40V, Current Mode Control, 100kHz to 1MHz Programmable Operation
Frequency, 5mm × 6mm QFN Package
LT3958 Boost, Flyback, SEPIC and Inverting Controller
with 3.3A, 84V Switch
5V ≤ V
IN
≤ 80V, Current Mode Control, 100kHz to 1MHz Programmable Operation
Frequency, 5mm × 6mm QFN Package
LT3573/LT3574/
LT3575
40V Isolated Flyback Converters Monolithic No-Opto Flybacks with Integrated 1.25A/0.65A/2.5A Switch
LT3511/LT3512 100V Isolated Flyback Converters Monolithic No-Opto Flybacks with Integrated 240mA/420mA Switch
LT3798 Offline Isolated No Opto-Coupler Flyback
Controller with Active PFC
V
IN
and V
OUT
Limited Only by External Components, MSOP-16 Package
LT3799/LT3799-1 Offline Isolated Flyback LED Controllers with
Active PFC
V
IN
and V
OUT
Limited Only by External Components, MSOP-16 Package
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