VIPer22a电路图.doc

VIPer22a电路图.docVlPer22ADIP
VIPer22AS
LOW POWER OFF LINE SMPS PRIMARY SWITCHER
VlPer22ADIP
VIPer22AS
VlPer22ADIP
VIPer22AS
Main 8 type
SM
DIP^
European (1d5-265Va4
12 W
20 W
US/Wicte range ©5 ・ 265 Vac)
7 W
12 W
TYPICAL POWER CAPABIUTY
RXED 60 KHZ SWITCHING FREQUENCY
SM TO 38V WIDE RANGE VDD VOLTAGE
CURRENT MODE CONTROL
/MJXILIARY UNDERVOLTAGE LOCKOUT V\4TH HYSTERESIS
HIGH VOLTAGE STARTUP CURRENT SOURCE
CVERTEMPERATURE, OVERCURRENT AND CMERVOLTAGE PROTECTION WITH XMJTORESTART
DESCRIPTION
The VIPe<22A cooiMnes a dedicated current mode FWM controler with a high voltage Power
battery chaiger adapters, standby power supplies for TV or monitocs, auxilaiy supples for motor control, etc. The internal control circuit offers the folowtng benefits:
-Large input voltage range on the Vqo P*n accommodates changes in auxlary supply voltage Ihte feature is wel adaptBd to battecy diarger adapter configurations.
-Automatic burst mode in low load condition
-Overvoltage protection in hiccup mode.
VlPer22ADIP
VIPer22AS
VlPer22ADIP
VIPer22AS
BLOCK DIAARABl
Figure 8 : Rectangular U J output characteristics for battery charger
VlPer22ADIP
VIPer22AS
VlPer22ADIP
VIPer22AS
开关电源通过电路控制开关管进行高速的导通与截止 ，将直流电转化为高频率的交
流电提供给变压器进行变压，从而产生所需要的一组或多组电压［1 ］。它具有效率高 的特性，而且开关电源的变压器体积比串联稳压型电源的要小得多 ，电源电路比较整
洁，整机重量也有所下