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參數(shù)資料
| 型號： | US3034CS |
| 廠商： | Unisem Group |
| 英文描述： | 8 PIN PWM SWITCHER CONTROLLER IC |
| 中文描述： | 8引腳的PWM開關控制器IC |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 74K |
| 代理商： | US3034CS |
US3034
4-7
Rev. 1.8
1/13/99
Figure 5- The circuit in figure 5 is designed to provide lossles output short detection by detecting the dc voltage across the inductor
and shutting down the MOSFET and entering HICCUP mode. Note that the current limit point is a function of the inductor resistance
and in this application with approximately 8 mil ohm resistance the peak C.L is set at 10A. See application note on how to set the
current limiting threshold.
Ref Desig
Description Qty
Part #
U1
Switcher IC
1
US3034CS ( 8 pin SOIC)
Q2
MOSFET
1
IRL3303 (TO263)
TYPICAL APPLICATION
5V to 3.3V with lossles short cicuit protection(output UVLO detection).
Manufacturer
Unisem
International
Rectifier
D1
Schottky Diode
1
PBYR735(Axial Thr Hole pkg)
PBYR1035B(SMT, TO263 pkg)
Core:T50-18,L=4 uH
Turns: 7T, 18 AWG
L=1 uH
10 ohm,5%, SMT
182 kohm,1%, SMT
1 kohm,1%, SMT
576ohm,1%, SMT
3.83 kohm,1%, SMT
1 kohm,1% , SMT
470uF, Elect
6MV1000GX, 1000uF,6.3V, Elect
1 uF,Ceramic, SMT
10 pF,Ceramic, SMT
0.1 uF
6MV1000GX, 1000uF,6.3V, Elect
0.047 uF
Motorola
Micro Metal
L2
Inductor
1
(core)
L1
R1,2
R3
R4
R5
R7
R6
C1
C2
C3
C5
C6
C7
C8
Inductor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
1
2
1
1
1
1
1
1
1
1
1
1
2
1
Sanyo
Sanyo
Sanyo
3034app5-1.1
Vout
5V
C1
L1
C3
Q2
C2
L2
R4
C7
D1
R2
C4
R5
R1
12V
R3
C5
C8
1
2
3
4
5
6
CS-
7
8
SS
Drv V12 Vfb Vhyst
Gnd
CS+
US3034
R6
C6
R7
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