LT1072HVI データシートの表示（PDF） - Linear Technology
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LT1072HVI Datasheet PDF : 16 Pages
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U
LT1072 OPERATIO
Synchronizing with Bipolar Transistor
VIN
LT1072
GND
VC
R3
2N2369
C1
C2
68pF R1
3k
R2
2.2k
FROM 5V
LOGIC
LT1072 • OP01
LT1072
Synchronizing with MOS Transistor
VIN
LT1072
GND
VC
R3
VN2222*
D1
1N4158
C2
200pF
C1
R2
D2
FROM 5V
2.2k
1N4158
LOGIC
*SILICONIX OR EQUIVALENT
LT1072 • OP02
TYPICAL APPLICATIO S
VIN
C5 +
5V
25µF*
Totally Isolated Converter
OPTIONAL
OUTPUT FILTER
R4
2.7k
VIN
VSW
1:N D1
C3
0.47µF
+
N
N+
C1
200µF
C4
200µF
L1
15V 10µH
+ C5
COM
200µF
L2
–15V 10µH
+
C6
200µF
LT1072
GND
VC FB
C2
0.01µF
N = 0.875 = 7:8
FOR VOUT = 15V
500Ω
R2
5k
*REQUIRED IF INPUT LEADS ≥ 2”
≈ 16V
VIN
0
tOFF
tON
SWITCH VOLTAGE
VOUT + Vf (Vf = DIODE FORWARD VOLTAGE)
0V
SECONDARY VOLTAGE
N • VIN
LT1072 • TA03
1072fc
9
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