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KA7521

Fairchild Semiconductor
Part Number KA7521
Manufacturer Fairchild Semiconductor
Description ELECTRONIC BALLAST CONTROLLER
Published May 9, 2016
Detailed Description KA7521 BALLAST CONTROLLER ELECTRONIC BALLAST CONTROLLER The KA7521 is a electronic ballast controller for fluorescent ...
Datasheet PDF File KA7521 PDF File

KA7521
KA7521

Overview
KA7521 BALLAST CONTROLLER ELECTRONIC BALLAST CONTROLLER The KA7521 is a electronic ballast controller for fluorescent inverter system.
It contains soft start, no lamp protection and over temperature protection.
With the zero voltage switching, it can also provide low noise and low power loss.
FEATURES • Dimming Control • 3 Step Soft start • ZVS Driving • DC feed-forward • No Lamp Protection • Over temperature protection with Variable Hysteresis • Option Comparator • Internal UVLO 16 DIP ORDERING INFORMATION Device KA7521 Package 16 DIP ÎOperating Temperature -25 ~ + 100 BLOCK DIAGRAM ©1999 Fairchild Semiconductor Corporation Rev.
B KA7521 BALLAST CONTROLLER ABLOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Peak driver output current Zener diode current Operating ambient temperature Storage Temperature Symbol VCC IO(P) IJ(ZD) TOPR TSTG Value 17 500 200 - 25 ~ +100 - 65 ~ +150 Unit V mA mA Î Î ÎELECTRICAL CHARACTERISTICS (VCC = 10V, TA = 25 , unless otherwise specified) Characteristic Symbol Test conditions Min Typ Max Unit Under Voltage Lock Out Section Start Threshold Voltage UV Lockout Hysteresis Start-up Supply Current Operating Supply Current Reference Section VTH(ST) VTHS IST ICC VCC = 7V VCC = 12V, No Load 9.
1 9.
7 10.
3 V 1.
7 1.
9 2.
1 V 0.
8 1.
0 mA 5 9 mA Reference Voltage Load Regulation Preheating Section LVREF VREF  0 IREF 5mA 4.
90 5 5.
10 V 5 mV Preheating Frequency Preheating Time Current Preheating Dead Time Oscillator Section FD VCS =0V, RT =33K, CT =330pF IPT VCS =0V TPD 120 7 2 160 KHz 27 uA 4 uS Amplitude Normal Frequency Normal Dead Time Output Section VOA 3 FNO VCS = 2V, RT = 33K, CT = 330pF 80 TND 1.
7 3.
8 V 120 KHz 3.
7 uS Rising Time Falling Time High Voltage Low Voltage Dimming Control Section Dimming 50 Frequency TJ NO LOAD TF NO LOAD VH IO = 30mA VL IO = - 30mA 80 120 nS 20 60 nS 7.
0 8.
0 V 0.
1 0.
4 V FD RD = 120K, RT= 33K, CT = 330pF 100 140 KHz Dimming Current ID RD = 120K 20 46 uA KA75...


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