參數(shù)資料
型號: FSD200
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: Green Mode Fairchild Power Switch (FPSTM)
中文描述: 0.365 A SWITCHING REGULATOR, 142 kHz SWITCHING FREQ-MAX, PDIP7
封裝: DIP-8/7
文件頁數(shù): 12/18頁
文件大?。?/td> 391K
代理商: FSD200
FSD210, FSD200
12
Typical application circuit
Features
High efficiency (>67% at Universal Input)
Low zero load power consumption (<100mW at 240Vac) with FSD210
Low component count
Enhanced system reliability through various protection functions
Internal soft-start (3ms)
Frequency Modulation for low EMI
Key Design Notes
The constant voltage (CV) mode control is implemented with resistors, R8, R9, R10 and R11, shunt regulator, U2, feedback
capacitor, C9 and opto-coupler, U3.
The constant current (CC) mode control is designed with resistors, R8, R9, R15, R16, R17 and R19, NPN transistor, Q1 and
NTC, TH1. When the voltage across current sensing resistors, R15,R16 and R17 is 0.7V, the NPN transistor turns on and the
current through the opto coupler LED increases. This reduces the feedback voltage and duty ratio. Therefore, the output
voltage decreases and the output current is regulated.
The NTC(negative thermal coefficient) is used to compensate the temperature characteristics of the transistor Q1.
1. Schematic
Application
Cellular Phone Charger
Output power
3.38W
Input voltage
Universal input (85-265Vac)
Output voltage (Max current)
5.2V (650mA)
For FSD2
1
x
L3
4uH
C8
L1 330uH
R19
510R
5R8
D6
1N4148
R3
47k
TH1 10k
Vo
.
R15 3R0
R5
39R
Q1
KSP2222A
1
U2
TL431
D1
R16 3R0
C9 470nF
TX1
R10
2.2k
C2
4.7uF 400V
0
3
C4
100nF
H11A817B
U3
R1 4.7k
4
C1
4.7UF 400V
C5
33uF 50V
7
Fuse
1W, 10R
C6
152M-Y, 250Vac
D3
1N4007
8
H11A817B
2
1
R7
4.7M, 1/4W
AC
R17 3R0
1D2
D4
1N4007
R9
56R
D5
UF4007
AC
0
R12
2k
C7
(5.2V/0.65A)
R4
47k
C10
4.7uF 50V
U1
FSD210
8
5
7
1
4
2
3
Vstr
Vcc
D
G
Vfb
G
G
D7
SB260
R6
4.7M 1/4W
0
C3
102k 1kV
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