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LT8494 Datasheet(PDF) 21 Page - Linear Technology

Part # LT8494
Description  SEPIC/Boost DC/DC Converter with 2A, 70V Switch, and 7關A Quiescent Current
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT8494 Datasheet(HTML) 21 Page - Linear Technology

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LT8494
21
8494fa
For more information www.linear.com/LT8494
TYPICAL APPLICATIONS
Li-Ion to 12V, Low Quiescent Current Boost at 650kHz
Low Quiescent Current, 5V to 300V, 250kHz Flyback Converter
DANGER HIGH VOLTAGE!
Operation by High Voltage Trained Personnel Only
L1
6.8µH
C1: 4.7µF, 6.3V, X7R, 1206
C2: 47µF, 16V, X5R, 1210
D1: ONSEMI MBRM120LT1G
L1: WURTH LHMI 74437346068
D1
1µF
VIN
2.8V TO 4.1V
VOUT
12V
0.2A
SW
FB
BIAS
GND
VIN
SWEN
RT
PG
SS
1M
110k
8494 TA04a
113k
LT8494
C2
47µF
C1
4.7µF
14.7µH
*KEEP MAXIMUM OUTPUT POWER BELOW 0.6W
C1: 2.2µF, 25V, X5R, 1206
C2: TDK C3225CH2J223K
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ON SEMICONDUCTOR MBRA2H100
T1: WURTH-FLEX FLEXIBAL TRANSFORMER 749196121
D1
T1
1:5
D2
1µF
VIN
5V
VOUT
300V
2mA
SW
FB
BIAS
GND
VIN
SWEN
RT
PG
SS
1M
1M
1M
12.1k
8494 TA05
324k
LT8494
C2
22nF
C1
2.2µF
•
•
LOAD CURRENT (mA)
0.2
1
10
100 200
55
60
65
70
75
80
85
90
95
8494 TA04b
Efficiency, VIN = 3.3V
2mA LOAD
5ms/DIV
8494 TA05b
VOUT
50V/DIV
IPRIMARY
0.5A/DIV
2mA LOAD
2µs/DIV
8494 TA05c
VOUT
0.5V/DIV
IPRIMARY
1A/DIV
Switching Waveforms
Start-Up Waveforms



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