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UC494AJ883B Fiches technique(PDF) 2 Page - Texas Instruments

No de pièce UC494AJ883B
Description  Advanced Regulating Pulse Width Modulators
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC494AJ883B Fiches technique(HTML) 2 Page - Texas Instruments

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CONNECTION DIAGRAMS
DIL-18 (TOP VIEW)
J or N Package
DIL-18 (TOP VIEW)
J or N Package
UC494A/AC
UC495A/AC
ABSOLUTE MAXIMUM RATINGS (Note 1, 2, 3)
Supply Voltage, VCC (Note 2). . . . . . . . . . . . . . . . . . . . . . . . 45V
Amplifier Input Voltages . . . . . . . . . . . . . . . . . . . . . . VCC + 0.3V
Collector Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 41V
Collector Output Current. . . . . . . . . . . . . . . . . . . . . . . . . 250mA
Continuous Total Dissipation . . . . . . . . . . . . . . . . . . . . 1000mW
@ (or below) 25
°C free air temperature range (Note 3)
Storage Temperature Range . . . . . . . . . . . . . . . -65° to +150°C
Lead Temperature 1/16" (1.6mm) from case for 60 seconds,
J Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
Lead Temperature 1/16" (1.6mm) from case for 10 seconds,
N Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Note 1: Over operating free air temperature range unless
otherwise noted.
Note 2: All voltage values are with respect to network
ground terminal 3.
Note 3: Consult Packaging Section of Databook regarding
thermal specifications and limitations of packages.
RECOMMENDED OPERATING CONDITIONS
Supply Voltage VCC . . . . . . . . . . . . . . . . . . . . . . . . . . 7V to 40V
Error Amplifier Input Voltages . . . . . . . . . . . . . -0.3V to VCC-2V
Collector Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
Collector Output Current (each transistor) . . . . . . . . . . . 200mA
Current into Feedback Terminal. . . . . . . . . . . . . . . . . . . . 0.3mA
Timing Capacitor, CT . . . . . . . . . . . . . . . . . 0.47nF to 10,000nF
Timing Resistor, RT . . . . . . . . . . . . . . . . . . . . . 1.8k
Ω to 500kΩ
Oscillator Frequency . . . . . . . . . . . . . . . . . . . . 1kHz to 300kHz
Operating Free Air Temperature
UC494A, UC495A . . . . . . . . . . . . . . . . . . . . -55°C to +125°C
UC494AC, UC495AC . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
ELECTRICAL CHARACTERISTICS:
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Reference Section
Output Voltage VREF
IO = 1mA, TA = 25
°C4.95
5
5.05
V
Input Regulation
VCC = 7V to 40V
2
25
mV
Output Regulation
IO = 1mA to 10mA
1
15
mV
Output Voltage Over Temperature
∆TA = Min. to Max.
4.90
5.10
V
Short Circuit Output Current
VREF = 0, TA = 25
°C (Note 1)
10
35
50
mA
Oscillator Section
Frequency (Note 2)
CT = 0.01
µF, RT = 12kΩ
10
kHz
Standard Deviation Of Frequency (Note 3)
All Values of VCC, CT, RT, TA Constant
10
%
Frequency Change With Voltage
VCC = 7V to 40V, TA = 25
°C0.1
%
Frequency Change With Temperature
CT = 0.01
µF, RT = 12kΩ, ∆TA = Min. to Max.
2
%
Deadtime Control Section (Output Control Connected to VREF)
Input Bias Current (Pin 4)
V(PIN 4) = 0V to 5.25V
-2
-10
µA
Maximum Duty-Cycle (Each Output)
V(PIN 4) = 0V
45
%
Unless otherwise stated, over recommended operating free-air temperature range,
VCC = 15V, f = 10kHz, TA = TJ.
UC494A/AC
UC495A/AC
2


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