TL494 Datasheet, PDF (4/6 Pages) Motorola, Inc – SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT

Pulse-Width-Modulation Control Circuits
TL494
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE
Rating
Supply voltage, Vcc
Amplifier input voltage
Collector output voltage
Collector output current
Operating free-air temperature range
Storage temperature range
Lead temperature 1,6 mm from case for 10 seconds
Value
Unit
41
Vcc +0.3
V
41
250
mA
0 to 70
-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
MIN
MAX
7
40
-0.3
Vcc -2
40
200
0.3
0.47
10000
1.8
500
1
300
0
70
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
MIN
4.75
Value
TYP**
5
2
1
0.2
35
MAX
5.25
25
15
1
Unit
V
mA
nF
KΩ
KHz
o_C
Unit
V
mV
%
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
All values of Vcc, C _T,R_T,
and T_A constant
Vcc=7V to 40V, T_A=25oC
C_T=0.01μF, R_T=12KΩ,
T_A = MIN to MAX
10
KHz
10
0.1
%
1
Mar. 2006-Rev06
148
HTC