Page 1
KA7524B
Power Factor Correction Controller
www.fairchildsemi.com
Features
• Internal self-starting
• Micro power start up mode
• Included under voltage lockout circuit
• Internal 1% reference
• High output current : Peak 500mA
Internal Block Diagram
Descripiton
The KA7524B provides the necessary features to implement
the Electroni c BALL A ST cont r o l and S.M . P.S application
for designing on active power factor correction circuit.
8-DIP
1
8-SOP
1
©2000 Fairchild Semiconductor International
Rev. 5.0
Page 2
KA7524B
Connection Diagram
KA7524/KA7524D (8 DIP, 8 SOP)
Absolute Maximum Ratings
Parameter Symbol Value Unit
Supply Voltage V
Peak Driver Output Current I
Detect Clamping Diode Current I
Output Clamping Diode Current I
Operating Ambient Temperature T
Storage Temperature T
CC
O(P)
DET
O(C.D)
OPR
STG
20 V
500 mA
10 mA
10 mA
-25 ~ + 100 -
-65 ~ + 150 -
2
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KA7524B
Electrical Characteristics
Parameter Symbol Conditions Min. Typ. Max. Unit
UNDER VOLTAGE LOCKOUT SECTION
Start Threshold Voltage V
UV Lockout Hysteresis V
Supply Zener Voltage V
TH(ST)
THS
Z
SUPPLY CURRENT SECTION
Start-Up Supply Current I
Operating Supply Current I
Dynamic Operating Current I
START
CC
CC(D)
VCCV
VCC = 12V, No Load - 6 12 mA
VCC = 12V, f = 50KHz,
C
= 1000PF
GS
REFERENCE SECTION(NOTE1)
Reference Voltage V
Line regulation V
Load Regulation V
REF
REF
REF
Temperature Stability ST
T
KA7524B/BD 2.475 2.5 2.525 V
12VVCC16V - 0.1 10 mV
0I
REF
ERROR AMPLIFIER SECTION
Input Offset Voltage V
Input Bias Current I
Large Signal Open Loop Gain G
IO
BIAS
V
Power Supply Rejection Ratio PSRR - 60 86 - dB
I
Output Current
Output Voltage Range V
SOURCE
I
SINK
O(P)
Unity Gain Bandwidth UBW - - 1.0 - MHz
Phase Margin MPH - - 57 - -
- 9.2 10 10.8 V
- 1.8 2.0 2.2 V
--17-V
TH
- 0.25 0.5 mA
-1020mA
2mA - 0.1 10 mV
--20-mV
--15-15mV
- -1 -0.1 1 uA
- 60 100 - dB
-2--mA
----2mA
-1.2-4V
3
Page 4
KA7524B
Elctrical Characteristics (Continued)
Parameter Symbol Conditions Min. Typ. Max. Unit
MULTIPLIER SECTION
M1 Input Voltage Range V
M2 Input Voltage Range V
Input Bias Current I
Mulitiplier Gain (Note2) G
Multiplier Gain Stability ST
CURRENT SDNSE SECTION
Input Offset Voltage V
Input Bias Current I
C. Sense Delay to Output t
CURRENT DETECT SECTION
Input Voltage Threshold V
Hysteresis V
Input Low Clamp Voltage V
Input High Clamp Voltage V
Input Current I
Input Clam Diode Current I
CURRENT DETECT SECTION
Output Voltage(High) V
Output Voltage(Low) V
Rising Time t
Falling Time t
SELF-STARTING SECTION
Self-Starting Time t
Notes :
1. Reference can not be tested on the PKG
2. G
V
= V
O(M)
/ (V
I(M1)VI(M2)
- V
REF
I(M1)
I(M2)
BIAS
V
IO
BIAS
D(S)
TH
THS
IC(L)
IC(H)
J
CD
O(H)
O(L)
R
F
SS
)
V
I(M1)
T
0VVCS1.7V -5 - 5 uA
Error Amp Output = 3.7V - 200 500 nS
I
DET
I
DET
0.9V
V
DET
IO = -10mA, VCC = 12V 7 9 - V
IO = 10mA, VCC = 12V - 0.8 1.8 V
CL = 1000pF - 100 200 nS
CL = 1000pF - 90 200 nS
-0-2V
-V
REF
-V
REF+1
- -2 -0.5 2 uA
= 0.5V, V
= 3V - 0.8 - uA
I(M2)
---0.2-/
--10-10mV
-1.01.31.6V
- - 200 - mV
= 0mA - - 0.95 V
= 3mA 6.1 7.1 - V
6V - 5 - uA
DET
0.9V, V
6V - - 3 mA
DET
-12--uS
V
4
Page 5
KA7524B Application Circuit
Part List
KA7524B
Resistor Capacitor Semiconductor
R1 1.8M
R2 10K
R3 100K
R4 3.3ohm
R5 22K
R6 27ohm
R7 2.2K
R8 2.2M
R9 150K
R10 330ohm
R11 0.75ohm
R12 5.1K
R13 1M
R14 390K
R15 3.9M
R16 5.1ohm
R17 27ohm
R18 5.1ohm
R19 27ohm
VR1 5K
NTC 10ohm
C1 0.1uF
C2 0.1uF
C3 4700pF
C4 4700pF
C5 0.1uF
C6 0.01uF
C7 100uF
C8 0.1uF
C9 3300pF
C10 47uF/450V
C11 0.1uF
C12 3300pF
C13 3300pF
C14 0.01uF
C15 0.01uF
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
IC1 KA7524B
Q1 IRF830
Q2 KSC5039
Q3 KSC5039
D1 1N4004
D2 1N4937
D3 1N4148
D4 1N4148
D5 FR107
D6 FR107
D7 FR107
D8 FR107
BD1 PBP204
TNR 12G471
DIAIC 32V
5
Page 6
KA7524B
Mechanical Dimensions
Package
6.40
±0.20
0.252
±0.008
8-DIP
Dimensions in millimeters
0.79
0.031
()
±0.10
±0.004
±0.10
±0.004
#1
#8
#4 #5
7.62
0.300
MAX
9.60
0.378
5.08
0.200
3.40
0.134
±0.20
9.20
MAX
±0.20
±0.008
±0.008
0.362
0.33
0.013
MIN
0.46
2.54
3.30
0.130
0.018
0.100
±0.30
±0.012
1.524
0.060
+0.10
0.25
–0.05
+0.004
0.010
–0.002
0~15°
6
Page 7
KA7524B
Mechanical Dimensions
Package
#1
#4
(Continued)
8-SOP
1.55 ±0.20
0.061 ±0.008
#8
#5
MAX
5.13
0.202
Dimensions in millimeters
0.1~0.25
MIN
0.004~0.001
0.56
0.022
()
4.92 ±0.20
0.194 ±0.008
0.006
0.15
+
-0.002
-0.05
0.004
0.50 ±0.20
0.020 ±0.008
+
0.10
6.00 ±0.30
0.236 ±0.012
3.95 ±0.20
0.156 ±0.008
5.72
0.225
0.071
0~8°
1.80
MAX
MAX0.10
MAX0.004
1.27
0.050
0.41 ±0.10
0.016 ±0.004
7
Page 8
KA7524B
Ordering Information
Product Number Package Operating Temperature
KA7524B 8-DIP
KA7524BD 8-SOP
-25°C ~ +100°C
8
Page 9
KA7524B
9
Page 10
KA7524B
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURT HER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABILITY, FUNCTIO N OR DESIGN. FAIRCH IL D DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER IT S PATENT RIGHTS, NOR THE RIGHTS OF OTHE RS.
LIFE SUPPORT POL I CY
FAIRCHILD’S PR ODUCTS ARE NOT AUTH ORIZED FOR USE AS C RITICAL COMPONENT S IN LIFE SUPPORT DE VICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
INTERNATIONAL. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
2. A critical component in any component of a life support
device or sy stem whose fai lure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
www.fairchildsemi.com
9/28/00 0.0m 001
2000 Fairchild Semiconductor International
Stock#DSxxxxxxxx
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