2013/02/25
Rev.A3 1
EM8563A
HV Start-up Green-mode PWM Convertor with Brown-Out Protection
General Description
EM8563A is a high performance, low cost, HV
Start-up, current mode PWM controller with green
mode power saving. The EM8563A integrates
functions of Soft Start (SS), Under Voltage Lockout
(UVLO), Leading Edge Blanking (LEB), internal Over
Temperature Protection (OTP), and internal slope
compensation. The EM8563A also features more
protection like Over Load Protection (OLP) and
Over Voltage Protection (OVP) to prevent circuit
damage occurred under abnormal conditions. The
EM8563A also has line under-voltage protection
(Brown-out Protection).
Ordering Information
Part Number
Package
Remark
EM8563AS7 DIP-7
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
Typical Application Circuit 1
AC
INPUT
EMI
Filter
EM
8563A
D
VCC
COMPGND
BNOCS
D
Typical application
DC
OUTPUT
2013/02/25
Rev.A3 2
EM8563A
Typical Application Circuit 2
Pin Configuration
DIP-7
TOP VIEW
D D
GND COMPBNOCS
VCC
1 2 3 4
567
Pin Assignment
Pin Name Pin Number
Pin Function
CS 1
Senses the primary current.
BNO
2
Line voltage detection. Use for brown
-
out protection.
GND 3
Ground.
COMP 4
Voltage feedback pin
.
By connecting a photo
-
coupler to close the control loop
and achieve the regulation.
VCC 5
IC Power Supply Pin.
D
6
,
7
For start-up, the pin is also HV Power MOSFET drain Pin.
AC
INPUT
EMI
Filter
EM
8563
A
D
VCC
COMP
GND
BNO
CS
D
Brown
-
out application
DC
OUTPUT