參數(shù)資料
型號: FAN3506
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 電源管理
英文描述: PC SMPS Secondary Side Control IC
中文描述: 5-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP16
封裝: 0.300 INCH, DIP-16
文件頁數(shù): 8/16頁
文件大?。?/td> 191K
代理商: FAN3506
FAN3506
8
4. Programmable Shunt Regulator
The core of the circuit equals to KA431(LM431) and Vref1 is trimmed to
±
2% (2.45V ~ 2.55V) and it is for corrective output
voltages (+5V/+12V). + 5V/ + 12V output voltages are determined by the resistor ratio of R3, R4, R5, R6.
A photo coupler is used in order to control PWM IC in the primary side. R1 determines the bias current of the shunt regulator
and 110
is appropriate value. The resistor value can be changed by set condition and requirements.
C1 and R2 , C2 are the compensation circuit for stability.
15
2
3
16
15
16
VREF
PWM IC
(KA38XX)
8
1
2
PC300-1
R3
10k
R4
39k
R5
4.7k
R6
1k
VREF
PC300-2
R1
0.11k
R2
1k
C1
103
C2
224
IK
V12
V5
IK
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