UC495AC datasheet(2/5 Pages) TI

2 / 5 page

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

5.05

Input Regulation

VCC = 7V to 40V

Output Regulation

IO = 1mA to 10mA

Output Voltage Over Temperature

∆TA = Min. to Max.

4.90

5.10

Short Circuit Output Current

VREF = 0, TA = 25

°C (Note 1)

Oscillator Section

Frequency (Note 2)

CT = 0.01

µF, RT = 12kΩ

kHz

Standard Deviation Of Frequency (Note 3)

All Values of VCC, CT, RT, TA Constant

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.

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

Unless otherwise stated, over recommended operating free-air temperature range,

VCC = 15V, f = 10kHz, TA = TJ.

UC494A/AC

UC495A/AC

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