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TL494
(Rev.:2015)

VOLTAGE MODE PWM CONTROL CIRCUIT

Unisonic Technologies 

TL494

LINEAR INTEGRATED CIRCUIT

 ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)

PARAMETER

SYMBOL

RATINGS

UNIT

Supply Voltage(Note 3)

VCC

41

V

Amplifier Input Voltage

Collector Output Voltage

VIN

VOUT

VCC+0.3

V

41

V

Collector Output Current

Power Dissipation (TA=25C)

Derate at TA＞25C

ICO

250

mA

PD

1000

9.2

mW

mW/C

Junction Temperature

TJ

125

C

Operating Temperature

Storage Temperature

TOPR

TSTG

-25 ~ +85

C

-40 ~ +150

C

Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

2. All voltage values, except differential voltages are with respect to the network ground terminal.

 RECOMMENDED OPERATING CONDITIONS

PARAMETER

Supply Voltage

Amplifier Input Voltage

Collector Output Voltage

Collector Output Current (each Transistor)

Current into Feedback

Timing Capacitor

Timing Resistor

Oscillator Frequency

Operating Free-Air Temperature

SYMBOL

VCC

VIN

VOUT

IC

If

CT

RT

fOSC

TA

MIN

7

-0.3

0.47

1.8

1

0

 ELECTRICAL CHARACTERISTICS

TYP

MAX

UNIT

40

V

VCC-2

V

40

V

200

mA

0.3

mA

10000

nF

500

kΩ

300

kHz

70

C

(Over recommended operating free-air temperature range, VCC=15V, f=1kHz, unless otherwise specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

REFERENCE SECTION

Output Voltage

Input Regulation

Output Regulation

Output Voltage Change with Temperature

Short-Circuit Output Current

VOUT

VIN

VOUT

IO(SC)

IOUT=1mA

VCC=7V ~ 40V

IOUT=1 ~ 10mA

TA=MIN ~ MAX(note 2)

VREF=0

4.75 5 5.25 V

2 25 mV

1 15 mV

0.2 1 %

35

mA

OSCILLATOR SECTION

Frequency

Standard Deviation of Frequency

F

CT=0.01μF, RT=12kΩ

All Values of VCC CT, RT, TA

constant

10

kHz

10

%

Frequency Change with Voltage

Frequency Change with Temperature

VCC=7V ~ 40V,Ta=25C

CT=0.01μF, RT=12kΩ,

TA=MIN ~ MAX

0.1

%

12 %

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

4 of 8

QW-R103-004. J

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