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参数资料
| 型号： | TL494 |
| 厂商： | Fairchild Semiconductor Corporation |
| 英文描述： | SMPS Controller |
| 中文描述： | 开关电源控制器 |
| 文件页数： | 3/17页 |
| 文件大小： | 449K |
| 代理商： | TL494 |
www.ti.com
Absolute Maximum Ratings
(1)
over operating free-air temperature range (unless otherwise noted)
Recommended Operating Conditions
TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074E–JANUARY 1983–REVISED FEBRUARY 2005
MIN
MAX
UNIT
V
V
V
mA
V
CC
V
I
V
O
I
O
Supply voltage
(2)
Amplifier input voltage
Collector output voltage
Collector output current
41
V
CC
+ 0.3
41
250
73
82
67
64
108
260
150
D package
DB package
N package
NS package
PW package
θ
JA
Package thermal impedance
(3)(4)
°
C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
Storage temperature range
°
C
°
C
T
stg
–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.
All voltages are with respect to the network ground terminal.
Maximum power disipation is a function of T
(max),
θ
, and T
. The maximum allowable power dissipation at any allowable ambient
temperatire is P
= (T
(max) – T
)/
θ
. Operating at the absolute maximum T
J
of 150
°
C can affect reliability.
The package thermal impedance is calculated in accordance with JESD 51-7.
(2)
(3)
(4)
MIN
MAX
UNIT
V
V
V
mA
mA
kHz
nF
k
V
CC
V
I
V
O
Supply voltage
Amplifier input voltage
Collector output voltage
Collector output current (each transistor)
Current into feedback terminal
Oscillator frequency
Timing capacitor
Timing resistor
7
40
–0.3
V
CC
– 2
40
200
0.3
300
f
OSC
C
T
R
T
1
0.47
1.8
10000
500
TL494C
TL494I
0
70
85
T
A
Operating free-air temperature
°
C
–40
3
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| TL496C | Replacement for Texas Instruments part number 54AS826/B3A. Buy from authorized manufacturer Rochester Electronics. |
| TL496CD | Replacement for Texas Instruments part number 54AS826/BKA. Buy from authorized manufacturer Rochester Electronics. |
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| TL494_09 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:VOLTAGE MODE PWM CONTROL CIRCUIT |
| TL494_10 | 制造商:TI 制造商全称:Texas Instruments 功能描述:PULSE-WIDTH-MODULATION CONTROL CIRCUITS |
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