TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
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SLVS074E–JANUARY 1983–REVISED FEBRUARY 2005
Absolute Maximum Ratings(1)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
41
UNIT
V
VCC
VI
Supply voltage(2)
Amplifier input voltage
Collector output voltage
Collector output current
VCC + 0.3
41
V
VO
IO
V
250
73
mA
D package
DB package
N package
NS package
PW package
82
θJA
Package thermal impedance(3)(4)
67
°C/W
64
108
260
150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
Storage temperature range
°C
°C
Tstg
–65
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to the network ground terminal.
(3) Maximum power disipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperatire is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
(4) The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions
MIN
7
MAX
40
UNIT
V
VCC
VI
Supply voltage
Amplifier input voltage
Collector output voltage
Collector output current (each transistor)
Current into feedback terminal
Oscillator frequency
–0.3
VCC – 2
40
V
VO
V
200
mA
mA
kHz
nF
kΩ
0.3
fOSC
CT
1
0.47
1.8
0
300
Timing capacitor
10000
500
RT
Timing resistor
TL494C
TL494I
70
TA
Operating free-air temperature
°C
–40
85
3
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