Product Summary

The TL494C is a pulse-width-modulation control circuit. It incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, the TL494C offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494C contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.

Parametrics

TL494C absolute maximum ratings: (1)VCC Supply voltage: max=41 V; (2)VI Amplifier input voltage: max=VCC + 0.3 V; (3)VO Collector output voltage: max=41 V; (4)IO Collector output current: max=250 mA; (5)θJA Package thermal impedance D package: 73 ℃/W; DB package: 82 ℃/W; N package: 67 ℃/W; NS package: 64 ℃/W, PW package: 108 ℃/W; (6)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: 260 ℃; (7)Tstg Storage temperature range: min=-65 ℃, max=150 ℃.

Features

TL494C features: (1)Complete PWM Power-Control Circuitry; (2)Uncommitted Outputs for 200-mA Sink or Source Current; (3)Output Control Selects Single-Ended or Push-Pull Operation; (4)Internal Circuitry Prohibits Double Pulse at Either Output; (5)Variable Dead Time Provides Control Over Total Range; (6)Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance; (7)Circuit Architecture Allows Easy Synchronization.

Diagrams

TL494C block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
TL494CD
TL494CD

Texas Instruments

Voltage Mode PWM Controllers PWM Controller

Data Sheet

0-1: $0.35
1-25: $0.31
25-100: $0.24
100-250: $0.24
TL494CDBR
TL494CDBR

Texas Instruments

Voltage Mode PWM Controllers Control Circuit

Data Sheet

Negotiable 
TL494CDBRE4
TL494CDBRE4

Texas Instruments

Voltage Mode PWM Controllers Control Circuit

Data Sheet

Negotiable 
TL494CDBRG4
TL494CDBRG4

Texas Instruments

Voltage Mode PWM Controllers PWM Control Circuit

Data Sheet

Negotiable 
TL494CDE4
TL494CDE4

Texas Instruments

Voltage Mode PWM Controllers Control Circuit

Data Sheet

0-1: $0.36
1-25: $0.28
25-100: $0.25
100-250: $0.22
TL494CDG
TL494CDG

ON Semiconductor

Voltage Mode PWM Controllers 40kHz 200mA PWM w/48% Duty Cycle Max

Data Sheet

0-1: $0.43
1-25: $0.36
25-100: $0.25
100-500: $0.21
TL494CDG4
TL494CDG4

Texas Instruments

Voltage Mode PWM Controllers PWM Control Circuit

Data Sheet

0-1: $0.36
1-25: $0.28
25-100: $0.25
100-250: $0.22
TL494CDR
TL494CDR

Texas Instruments

Voltage Mode PWM Controllers PWM Controller

Data Sheet

0-1: $0.36
1-25: $0.25
25-100: $0.22
100-250: $0.19