UTC KA7524 LINEAR INTEGRATED CIRCUIT
POWER FACTOR CONTROLLER
DESCRIPTION
The UTC KA7524 provides the necessary features to
implement the Electronic BALLAST control and S.M.P.S
application for designing active power factor correction circuit
FEATURES
*Internal self-starting
*Micro power start up mode
*Included under voltage lockout circuit
*Internal 1% reference
*High output current: peak 500mA
DIP-8
BLOCK DIAGRAM
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R114-001,A
UTC KA7524 LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS(Ta=25°C)
PARAMETER SYMBOL VALUE UNIT
Supply Voltage Vcc 20 V
Peak Driver Output Current Io(p) 500 mA
Detect Clamping Diode Current Idet 10 mA
Output Clamping Diode Current Io(c.d) 10 mA
Operating Temperature Topr -45~65 °C
Storage Temperature Tstg -65~150 °C
ELECTRICAL CHARACTERISTICS (Ta=25°C)
(All voltage referenced to GND unless othrewise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Under Voltage Lockout Section
Start Threshold Voltage Vth(st) 9.2 10 10.8 V
UV lockout Hysteresis Vths 1.8 2.0 2.2 V
Supply Zener Voltage Vz 17 V
Supply Current Section
Start-up Supply Current Istart Vcc<Vth 0.25 0.5 mA
Operating Supply
Current
Dynamic Operating
Current
Reference Section (note 1)
Reference Voltage Vref 2.475 2.5 2.525 V
Line Regulation Vref 12V<Vcc<16V 0.1 10 mV
Load Regulation Vref 0<Iref<2mA 0.1 10 mV
Temperature Stability STt 20 mV
Error Amplifier Section
Input Offset Voltage Vio -15 15 mV
Input Bias Current Ibias -1 -0.1 1 µA
Large Signal Open Loop
gain
Power Supply Rejection
Ratio
Output Current Isource 2 mA
Output Voltage range Vo(p) 1.2 4 V
Unity Gain Bandwidth UBW 1.0 MHZ
Phase Margin MPH 57 °C
Icc Vcc=12V,No load 6 12 mA
Icc(d) Vcc=12V,f=50KHZ,
Cgs=1000pF
Gv 60 100 dB
PSRR 60 86 dB
Isink -2 mA
10 20 mA
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R114-001,A
2
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