TL494_08 Datasheet, PDF (4/6 Pages) HTC Korea TAEJIN Technology Co. – Pulse-Width-Modulation Control Circuits

Pulse-Width-Modulation Control Circuits
TL494
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE
Rating
Value
Unit
Supply voltage, Vcc
41
Amplifier input voltage
Vcc +0.3
V
Collector output voltage
41
Collector output current
250
mA
Operating free-air temperature range
Storage temperature range
Lead temperature 1,6 mm from case for 10 seconds
-40 to 125
-65 to 150
o_C
260
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply voltage, Vcc
Amplifier input voltage, Vi
Collector output voltage, Vo
Collector output current (each transistor)
Current into feedback terminal
Timing capacitor, C_T
Timing resistor, R_T
Oscillator frequency
Operating free-air temperature, T_A
Value
Unit
MIN
MAX
7
40
-0.3
Vcc -2
V
40
200
mA
0.3
0.47
10000
nF
1.8
500
KΩ
1
300
KHz
-40
85
o_C
Electrical characteristics over recommended operatng free-air temperature range,
Vcc=15V, f= 10 kHz(unless otherwise noted).
Parameter
Output voltage (Vref)
Input regulation
Output regulation
Output voltage change with temperature
Short-circuit output current***
Test Conditions*
lo = 1mA
Vcc = 7V to 40 V
Io = 1mA to 10mA
T_A = MIN to MAX
Vref = 0
Value
Unit
MIN TYP** MAX
4.75
5
5.25
V
2
25
mV
1
15
0.2
1
%
35
mA
Oscillator section (See Figure 1)
Parameter
Frequency
Standard deviation of frequency****
Frequency change with voltage
Frequency change with temperature****
Test Conditions*
Value
Unit
MIN TYP** MAX
C_T=0.01μF, R_T=12KΩ
10
KHz
All values of Vcc, C_T,R_T,
10
and T_A constant
Vcc=7V to 40V, T_A=25oC
0.1
%
C_T=0.01μF, R_T=12KΩ,
1
T_A = MIN to MAX
2008 - Ver. 1.2
4/6
HTC