
PJ494
Switchmode Pulse Width Modulation Control Circuit
2-11
2002/11.rev.A
Parameter
Symbol
Vcc
Vi
Vo
C
T
R
T
T
A
Min
7
-0.3
0.47
1.8
1
0
Max
40
Vcc-2
40
200
0.3
10000
500
300
70
Unit
V
Supply voltage
Amplifier input voltage
Collector output voltage
Collector output current(each transistor)
Current into feedback terminal
Timing capacitor
Timing resistor
Oscillator frequency
Operating free-air temperature
Vcc=15V, f=10KHz (unless otherwise noted).
REFERENCE SECTION
mA
nF
K
KHz
℃
Value
Typ
5
2.0
3.0
0.2
35
Parameter
Test Conditions*
Min
4.75
--
--
--
15
Max
5.25
25
15
1
75
Unit
Output voltage(Vref)
Line regulation
Load regulation
Output voltage change with temperature
Short-circuit output current***
OSCILLATOR SECTION
Io=1mA
Vcc=7V to 40V
Io=1mA to 10mA
T
A
=MIN to MAX
Vref=0
V
mV
%
mA
Value
Typ
40
3.0
0.1
--
Parameter
Test Conditions*
Min
--
--
--
--
Max
--
--
--
12
Unit
Frequency
Standard deviation of frequency****
Frequency change with voltage
Frequency change with temperature***
C
T
=0.001
μ
F,R
T
=30K
C
T
=0.001
μ
F,R
T
=30K
Vcc=7V to 40V, T
A
=25
℃
C
T
=0.001
μ
F,R
T
=30K
T
A
=MIN to MAX
KHz
%
ERROR AMPLIFIER SECTION
Parameter
Value
Typ**
2.0
5.0
-0.1
-0.3 toV
cc
-2
95
800
90
100
0.7
-4.0
Test Conditions*
Min
--
--
--
Max
10
250
-1.0
Unit
Input offset voltage
Input offset current
Input bias current
Common-mode input voltage range
Open-loop voltage amplification
Unity-gain bandwidth
Common-mode rejection ratio
Power Supplu Rejection Ratio
Output sink current (pin 3)
Output source current (pin 3)
OUTPUT SECTION
Vo=(pin 3)=2.5V
Vo=(pin 3)=2.5V
Vo=(pin 3)=2.5V
Vcc=7V to 40V
Vo=3V,R
L
=2K
,Vo=0.5 to 3.5V
R
L
=2K
,Vo=0.5 to 3.5V
Vo=40V, T
A
=25
℃
Vcc=33V,Vo=2.5V,R
L
=2K
V
ID
=-15mV to -5V,V
(PIN3)
=0.7V
V
ID
=15mV to 5V,V
(PIN3)
=3.5V
mA
nA
μ
A
V
dB
KHz
dB
dB
mA
mA
70
--
65
--
0.3
2.0
--
--
--
--
--
--
Value
Typ
2.0
--
1.1
1.5
--
Parameter
Test Conditions
Min
--
--
--
--
--
Max
100
-100
1.3
2.5
3.5
Unit
Collector off-state current
Emitter off-state current
Collector-emitter saturation
voltage
Output control input current
V
CE
=40V,V
CC
=40V
Vcc=Vc=40V, V
E
=0
V
E
=0, Ic=200mA
Vc=15V, I
E
=-200mA
V
I
=Vref
μ
A
Common-emitter
Emitter-follower
V
mA
RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING FREE-AIR TEMPERATURE