Product Summary

The TL494CN 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 TL494CN offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494CN 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. It provides for push-pull or single-ended output operation, which can be selected through the output-control function.

Parametrics

TL494CN absolute maximum ratings: (1)VCC Supply voltage: 41 V MAX; (2)VI Amplifier input voltage: VCC + 0.3 V max; (3)VO Collector output voltage: 41 V max; (4)IO Collector output current: 250 mA max; (5)θJA Package thermal impedance:D package: 73℃/W max; DB package℃/W max: 82; N package 67 ℃/W max; NS package: 64℃/W max; PW package: 108℃/W max; (6)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: 260 ℃ max; (7)Tstg, Storage temperature range: –65 to 150 ℃.

Features

TL494CN 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

TL494CN block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
TL494CN
TL494CN
Texas Instruments
Voltage Mode PWM Controllers PWM Controller
Data Sheet
0-1: $0.31
1-25: $0.27
25-100: $0.20
100-250: $0.20
TL494CNE4
TL494CNE4
Texas Instruments
Voltage Mode PWM Controllers Control Circuit
Data Sheet
0-1: $0.47
1-25: $0.37
25-100: $0.32
100-250: $0.28
TL494CNG
TL494CNG
ON Semiconductor
Voltage Mode PWM Controllers 40kHz 200mA PWM w/48% Duty Cycle Max
Data Sheet
0-1: $0.50
1-25: $0.39
25-100: $0.34
100-500: $0.25
TL494CNSR
TL494CNSR
Texas Instruments
Voltage Mode PWM Controllers PWM Controller
Data Sheet
0-1: $0.35
1-25: $0.27
25-100: $0.24
100-250: $0.21
TL494CNSRG4
TL494CNSRG4
Texas Instruments
Voltage Mode PWM Controllers Control Circuit
Data Sheet
0-1: $0.40
1-25: $0.31
25-100: $0.27
100-250: $0.24