Data Sheet

© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com
KA7500C • Rev. 1.0.2 5
KA7500C — SMPS Controller
Electrical Characteristics
V
CC
= 20V, f = 10kHz, T
A
= -25°C to +85°C, unless otherwise specified.
Symbol Parameter Conditions Min. Typ. Max. Units
Reference Section
I
REF
=1mA, T
A
=25°C
(1)
4.95 5.00 5.05
V
REF
Reference Output Voltage
I
REF
=1mA 4.90 5.00 5.10
V
R
LINE
Line Regulation V
CC
=7V to 40V 2 25 mV
R
LOAD
Load Regulation I
REF
=1mA to 10mA 1 15 mV
I
SC
Short-Circuit Output Current V
REF
=0V 10 35 50 mA
Oscillation Frequency
C
T
=0.001µF, R
T
=30KΩ
40.0
C
T
=0.01µF, R
T
=12KΩ,
T
A
=25°C
9.2 10.0 10.8
f
OSC
Oscillation Frequency
C
T
=0.01µF, R
T
=12KΩ,
T
A
=T
LOW
to T
HIGH
9.0 12.0
kHz
Δf/Δt
Frequency Change with Temperature
C
T
=0.01µF, R
T
=12KΩ
2 %
Dead-Time Control Section
I
BIAS
Input Bias Current
V
CC
=15V, 0V≤ V
4
≤ 5.25V
-2 -10 µA
D
(MAX)
Maximum Duty Cycle
V
CC
=15V, V
4
=0V, OC
Pin=V
REF
45 %
Zero Duty Cycle 3.0 3.3
V
ITH
Input Threshold Voltage
Maximum Duty Cycle 0
V
Error Amplifier Section
V
IO
Input Offset Voltage V
3
=2.5V 2 10 mV
I
IO
Input Offset Current V
3
=2.5V 25 250 mA
I
BIAS
Input Bias Current V
3
=2.5V 0.2 1.0 µA
V
CIM
Common Mode Input Voltage
7V≤ V
CC
≤ 40V
-0.3 V
CC
V
G
VO
Open-Loop Voltage Gain
0.5V≤ V
3
≤ 3.5V
70 95 dB
B
W
Unit-Gain Bandwidth 650 kHz
PWM Comparator Section
V
ITH
Input Threshold Voltage Zero Duty Cycle 4.0 4.5 V
I
SINK
Input Sink Current V
3
=0.7V -0.3 -0.7 mA
Output Section
V
CE(SAT)
Output Saturation Voltage Common
Emitter
V
E
=0V, I
C
=200mA 1.0 1.3
V
CC(SAT)
Emitter-Follower V
C
=15V, I
E
=-200mA 1.5 2.5
V
I
C(OFF)
Collector Off-State Current V
CC
=40V, V
CE
=40V 2 100
I
E(OFF)
Emitter Off-State Current V
CC
=V
C
=40V, V
E
=40V -100
µA
Total Device
I
CC
Supply Current Pin6=V
REF
, V
CC
=15V 6 10 mA
Output Switching Characteristics
t
R
Rise Time, Common Emitter,
Common Collector
100 200
t
F
Fall Time, Common Emitter,
Common Collector
25 100
ns
Note:
1. This is guaranteed where the marking code of the package surface is over 027.