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SA7527 Datasheet Preview

SA7527 Datasheet

POWER FACTOR CORRECTION CONTROLLER

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SA7527
POWER FACTOR CORRECTION CONTROLLER OF CRITICAL DUCTING
DESCRIPTION
The SA7527 provides simple and high performance active power
factor correction. The SA7527 is optimized for electronic ballasts and
low power and high-density power supplies which require minimum
board size, reduced external components and low power dissipation.
Because the R/C filter is included in the current sense block, the
external R/C filter is not necessary. Special circuitry has also been
added to prevent no load runaway conditions. Regardless of the supply
voltage, the output drive clamping circuit limits the overshoot of the
power MOSFET gate drive. It greatly enhances the system reliability.
DIP-8-300-2.54
SOP-8-225-1.27
FEATURES
* Internal start-up timer
* Internal R/C filter eliminates the need for an external R/C filter
* Very precise adjustable output over voltage protection
* Zero current detector
* One quadrant multiplier
* Trimmed 1.5% internal band gap reference
* Under voltage lockout with 3V of hysteresis
* Totem pole output with high state clamp
* Low start-up and operating current
* 8-pin DIP or 8-pin SOP
ORDERING INFORMATION
Device
SA7527
SA7527S
Package
DIP-8-300-2.54
SOP-8-225-1.27
APPLICATIONS
* Electronic ballast
* SMPS
BLOCK DIAGRAM
www.DataSheet4U.com
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2005.07.22
Page 1 of 8




Silan Microelectronics

SA7527 Datasheet Preview

SA7527 Datasheet

POWER FACTOR CORRECTION CONTROLLER

No Preview Available !

SA7527
ABSOLUTE MAXIMUM RATINGS (Tamb=25°C)
Characteristics
Supply Voltage
Peak Drive Output Current
Driver Output Clamping Diodes
VO>VCC or VO<-0.3V
Detector Clamping Diodes
Error Amp, Multiplier And
Comparator Input Voltage
Operating Junction Temperature
Operating Temperature Range
Storage Temperature Range
Power Dissipation
Symbol
VCC
IOH, IOL
Iclamp
Idet
Vin
Tj
Topr
Tstg
Pd
Rating
30
±500
±10
±10
-0.3 to 6
150
-25 to 125
-65 to 150
0.8
Unit
V
mA
mA
mA
V
°C
°C
°C
W
TEMPERATURE CHARACTERISTICS
Characteristics
Temperature Stability For Reference Voltage (Vref)
Temperature Stability For Multiplier Gain (K)
Symbol
Vref
K/T
Min.
--
--
Typ.
20
-0.2
Max.
--
--
Unit
mV
%/°C
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, VCC=14V, -25°C Tamb125°C)
Characteristics
Under Voltage Lockout Section
Start Threshold Voltage
UVLO Hysteresis
Supply Current Section
www.DataShSeteatr4tU-U.cpomSupply Current
Operating Supply Current
Operating Current OVP
Dynamic Operating Supply Current
Error Amplifier Section
Voltage Feedback Input Threshold
Line Regulation
Temperature Stability Of Vref (note)
Input Bias Current
Output Source Current
Output Sink Current
Output Upper Clamp Voltage (note)
Output Lower Clamp Voltage (note)
Symbol
Test condition
Vth (st)
HY (st)
VCC increasing
--
Ist
ICC
ICC(OVP)
IDCC
VCC=Vth(st)-0.2
Output not switching
Vinv=3V
50kHz, CI=1nF
Vref
Vref1
Vref3
Ib(ea)
Isource
Isink
Veao(H)
Veao(L)
Iref=0mA, Tamb=25°C
-25Tamb125°C
14VVCC25V
-25Tamb125°C
--
Vm2=4V
Vm2=4V
Isource=0.1mA
Isink=0.1mA
Min. Typ. Max. Unit
10.5 11.5 12.5
234
V
V
10 60 100 µA
-- 3 6 mA
-- 1.7 4 mA
-- 4 8 mA
2.465
2.44
--
--
-0.5
-2
2
--
--
2.5 2.535 V
2.5 2.56 V
0.1 10 mV
20 -- mV
-- 0.5 µA
-4 -- mA
4 -- mA
6 -- V
2.25 --
V
(To be continued)
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.0 2005.07.22
Page 2 of 8


Part Number SA7527
Description POWER FACTOR CORRECTION CONTROLLER
Maker Silan Microelectronics
Total Page 8 Pages
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