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KA7524B
Power Factor Correction Controller
Features
•
•
•
•
•
Internal self-starting
Micro power start up mode
Included under voltage lockout circuit
Internal 1% reference
High output current : Peak 500mA
Descripiton
The KA7524B provides the necessary features to implement
the Electronic BALLAST control and S.M.P.S application
for designing on active power factor correction circuit.
8-DIP
1
8-SOP
1
Internal Block Diagram
Rev. 5.0
©2000 Fairchild Semiconductor International
KA7524B
Connection Diagram
KA7524/KA7524D (8 DIP, 8 SOP)
Absolute Maximum Ratings
Parameter
Supply Voltage
Peak Driver Output Current
Detect Clamping Diode Current
Output Clamping Diode Current
Operating Ambient Temperature
Storage Temperature
Symbol
V
CC
I
O(P)
I
DET
I
O(C.D)
T
OPR
T
STG
Value
20
500
10
10
-25 ~ + 100
-65 ~ + 150
Unit
V
mA
mA
mA
-
-
2
KA7524B
Electrical Characteristics
Parameter
Start Threshold Voltage
UV Lockout Hysteresis
Supply Zener Voltage
SUPPLY CURRENT SECTION
Start-Up Supply Current
Operating Supply Current
Dynamic Operating Current
REFERENCE SECTION(NOTE1)
Reference Voltage
Line regulation
Load Regulation
Temperature Stability
ERROR AMPLIFIER SECTION
Input Offset Voltage
Input Bias Current
Large Signal Open Loop Gain
Power Supply Rejection Ratio
Output Current
Output Voltage Range
Unity Gain Bandwidth
Phase Margin
V
IO
I
BIAS
G
V
PSRR
I
SOURCE
I
SINK
V
O(P)
UBW
MPH
-
-
-
-
-
-
-
-
-
-15
-1
60
60
2
-
1.2
-
-
-
-0.1
100
86
-
-
-
1.0
57
15
1
-
-
-
-2
4
-
-
mV
uA
dB
dB
mA
mA
V
MHz
-
V
REF
V
REF
V
REF
ST
T
KA7524B/BD
12VV
CC
16V
0I
REF
2mA
-
2.475
-
-
-
2.5
0.1
0.1
20
2.525
10
10
-
V
mV
mV
mV
I
START
I
CC
I
CC(D)
V
CC
V
TH
V
CC
= 12V, No Load
V
CC
= 12V, f = 50KHz,
C
GS
= 1000PF
-
-
-
0.25
6
10
0.5
12
20
mA
mA
mA
Symbol
V
TH(ST)
V
THS
V
Z
Conditions
-
-
-
Min.
9.2
1.8
-
Typ.
10
2.0
17
Max.
10.8
2.2
-
Unit
V
V
V
UNDER VOLTAGE LOCKOUT SECTION
3
KA7524B
Elctrical Characteristics (Continued)
Parameter
MULTIPLIER SECTION
M1 Input Voltage Range
M2 Input Voltage Range
Input Bias Current
Mulitiplier Gain (Note2)
Multiplier Gain Stability
CURRENT SDNSE SECTION
Input Offset Voltage
Input Bias Current
C. Sense Delay to Output
CURRENT DETECT SECTION
Input Voltage Threshold
Hysteresis
Input Low Clamp Voltage
Input High Clamp Voltage
Input Current
Input Clam Diode Current
CURRENT DETECT SECTION
Output Voltage(High)
Output Voltage(Low)
Rising Time
Falling Time
SELF-STARTING SECTION
Self-Starting Time
t
SS
-
12
-
-
uS
Notes :
1. Reference can not be tested on the PKG
2. G
V
= V
O(M)
/ (V
I(M1)
V
I(M2)
- V
REF
)
Symbol
V
I(M1)
V
I(M2)
I
BIAS
G
V
ST
T
V
IO
I
BIAS
t
D(S)
V
TH
V
THS
V
IC(L)
V
IC(H)
I
J
I
CD
V
O(H)
V
O(L)
t
R
t
F
Conditions
-
-
-
V
I(M1)
= 0.5V, V
I(M2)
= 3V
-
-
0VV
CS
1.7V
Error Amp Output = 3.7V
-
-
I
DET
= 0mA
I
DET
= 3mA
0.9V
DET
6V
V
DET
0.9V, V
DET
6V
I
O
= -10mA, V
CC
= 12V
I
O
= 10mA, V
CC
= 12V
CL = 1000pF
CL = 1000pF
Min.
0
V
REF
-2
-
-
-10
-5
-
1.0
-
-
6.1
-
-
7
-
-
-
Typ.
-
-
-0.5
0.8
-0.2
-
-
200
1.3
200
-
7.1
5
-
9
0.8
100
90
Max.
2
V
REF+1
2
-
-
10
5
500
1.6
-
0.95
-
-
3
-
1.8
200
200
Unit
V
V
uA
uA
/
mV
uA
nS
V
mV
V
V
uA
mA
V
V
nS
nS
4
KA7524B
KA7524B Application Circuit
Part List
Resistor
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
VR1
NTC
1.8M
10K
100K
3.3ohm
22K
27ohm
2.2K
2.2M
150K
330ohm
0.75ohm
5.1K
1M
390K
3.9M
5.1ohm
27ohm
5.1ohm
27ohm
5K
10ohm
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
Capacitor
0.1uF
0.1uF
4700pF
4700pF
0.1uF
0.01uF
100uF
0.1uF
3300pF
47uF/450V
0.1uF
3300pF
3300pF
0.01uF
0.01uF
IC1
Q1
Q2
Q3
D1
D2
D3
D4
D5
D6
D7
D8
BD1
TNR
DIAIC
Semiconductor
KA7524B
IRF830
KSC5039
KSC5039
1N4004
1N4937
1N4148
1N4148
FR107
FR107
FR107
FR107
PBP204
12G471
32V
Magnetics
T1
EI-25 (PC30): P = 70T, S = 4T, Gap = 0.5mm
T2
D15 (GP-5): P = 3T, S = 13T
L1
EE-25 (Iron Power) 80mH
L2, L3 EI-25 (PC30): 150T, Gap = 0.4mm
5