LT3758 LINER [Linear Technology], LT3758 Datasheet - Page 29

• Manufacturer Part Number: LT3758
• Description: High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
100
90
80
70
60
50
40
30
20
0.01
V
36V TO 72V
IN
Effi ciency vs Output Current
= 48V
V
IN
OUTPUT CURRENT (A)
0.1
C
T1: COILTRONICS VP2-0066
M1: VISHAY SILICONIX SI4848DY
63.4k
200kHz
IN
: MURATA GRM32ER72A225KA35L
C
2.2μF
100V
X7R
IN
1
1M
44.2k
100pF
0.47μF
50V/DIV
12V Output Nonisolated Flyback Power Supply
3758 TA03b
5V/DIV
V
V
OUT
SW
10
SHDN/UVLO
SYNC
RT
SS
Frequency Foldback Waveforms
V
VC
IN
10k
When Output Short-Circuit
= 48V
10nF
LT3758
V
IN
GND INTV
0.022μF
100V
SENSE
20μs/DIV
GATE
D1: ON SEMICONDUCTOR MBRS360T3G
D
C
FBX
OUT
SN
CC
: VISHAY SILICONIX ES1D
C
4.7μF
10V
X5R
: MURATA GRM32ER61C476ME15L
VCC
D
1N4148
SN
6.2k
(SERIES)
5.1Ω
0.030Ω
5V/DIV
3758 TA03d
1,2,3
V
SW
OUT
T1
M1
V
IN
4,5,6
(PARALLEL)
= 48V
D1
Start-Up Waveform
5ms/DIV
105k
1%
15.8k
1%
3758 TA03a
C
47μF
X5R
OUT
V
12V
1.2A
OUT
3758 TA03c
LT3758
29
3758f