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EM8671A Datasheet

PWM Controller

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EM8671/A
HV Start-up Green-mode PWM Controller with Brown-Out Protection
General Description
EM8671/A is a high performance, low cost, HV
Start-up, current mode PWM controller with green
mode power saving. The EM8671/A integrates
functions of Soft Start(SS), Under Voltage
Lockout(UVLO), Leading Edge Blanking(LEB),
internal Over Temperature Protection(OTP),
internal slope compensation. The EM8671/A also
features more protection like Over Load
Protection(OLP) and Over Voltage Protection(OVP)
to prevent circuit damage occurred under
abnormal conditions. The EM8671/A also has line
under-voltage protection (Brown-out Protection).
Ordering Information
Part Number
EM8671G
EM8671G7
EM8671AG
EM8671AG7
Package
SOP-8
SOP-7
SOP-8
SOP-7
Deep burst CS level
0.3V
0.3V
0.1V
0.1V
Typical Application Circuit
Features
700V High Voltage Start up Circuit
Current Mode Control
Soft Start Function
Built-in Slope Compensation
Internal Leading-edge Blanking
Brown in/out Protection
Over Voltage Protection (OVP) on VCC pin
Over Load Protection (OLP)
Cycle-by-cycle Current Limit
Feedback Open Protection
Internal Over Temperature Protection (OTP)
Constant Output Power Limit (Full AC Input
Range)
Excellent EMI performance
Applications
LCD Monitor Power Supply
Open-Frame SMPS
2013/01/30
REV.A.3
1
Excelliance MOS
Excelliance MOS



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