DIMMING BALLAST CONTROL IC
KA7522/D
DIMMING BALLAST CONTROL IC
BALLAST CONTROL IC
The KA7522 is a electronic ballast controller for fluorescent i...
Description
KA7522/D
DIMMING BALLAST CONTROL IC
BALLAST CONTROL IC
The KA7522 is a electronic ballast controller for fluorescent inverter systems. It contains whole function in KA7521, current feed back and preheating time controlled by temperature sensing.
FEATURES
3-step soft start Input voltage limit & Brown out Non Lamp detect, & Lamp reset ZVS Guard control Current feedback control Preheating time controlled by temperature sensing
22 DIP 20 SOP
BLOCK DIAGRAM
Tsns 17
Rhys 18
ORDERING INFORMATION
Device KA7522 KA7522D
Package 22 SDIP 20 SOP
Operating Temperature
Î-25 ~ + 100 Î-25 ~ + 100
Vds
Vgs
16 15
VCC 20
BROW N OUT
OVER TEMPERATUR E
IN P U T V LIM IT
ZVS GUARD CONTRO L
10
3 STEP
8 LOW - SOFT
TEMPER
START
7
SAW TOO TH GENERATOR
+ -
U V L O & 5 V V re f
1 4 V re f
2 D -F/F
2 OUTPUT STAGE
2 OUT2 19 OUT1
D C -F E ED 12 FORW AR D
DELAY TIMER
D IM M IN G BOX
CURREN T FEEDBACK M U LT IP LIE R
LAMP DETECT
NON LAMP
OVERCURREN T
4 Vsns
LAMP RESET
9
ñ
5 V lm 1
6 V lm 2
11 Vmo
13 V fb
©1999 Fairchild Semiconductor Corporation
Rev. B
KA7522/D
DIMMING BALLAST CONTROL IC
ÎABSOLUTE MAXIMUM RATINGS (TA = 25 , unless otherwise specified)
Characteristic
Supply Voltage Peak driver output current Operating ambient temperatute Storage temperature
Symbol
VCC IO(P) T(OPR) TSTG
Value
20 500 -25 ~ +100 -65 ~ +150
Unit
V
mÎÎA
ELECTRICAL CHARACTERISTICS
Î(VCC = 12V, TA = 25 , unless otherwise specified)
Characteristics
Under Voltage Lock Out...
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