Pulse-Width-Modulation Control Circuits
TL494
FEATURES
● Complete PWM Power Control Circuitry ● Uncommitted Outputs fo...
Pulse-Width-Modulation Control Circuits
TL494
FEATURES
● Complete PWM Power Control Circuitry ● Uncommitted Outputs for 200 mA Sink or Source Current ● Output Control Selects Single-Ended or Push-Pull Operation ● Internal Circuitry Prohibits Double Pulse at Either Output ● Variable Dead-Time Provides Control over Total Range ● Internal Regulator Provides a Stable 5-V Reference Supply,5% ● Circuit Architecture Allows Easy Synchronization ● Moisture Sensitivity Level 3
SOP16/DIP16 (TOP VIEW)
NONINV
Error
INPUT
1
16
AMP 1
INV INPUT 2
15
FEEDBACK 3
14
DEAD-TIME
4
13
CT
5
12
RT
6
11
GND
7
10
C1
8
9
NONINV INPUT
INV INPUT
Error AMP 2
REF OUT OUTPUT
Vcc C2 E2 E1
DESCRIPTION
The TL494 incorporate on a single monolithic chip all the functions
required in the construction of a pulse-width-modulation control, these devices offer the systems engineer the flexibility to tailor
ORDERING INFORMATION
Device
Package
the power supply control circuitry to his application. The TL494 contains an error amplifier, an on-chip adjustable oscillator, a dead-time control comparator, pulse-steering control
TL494D TL494GD (Halogen Free)
TL494N
SOP16 16 DIP
flip-flop, a 5-volt, 5% precision regulator, and output-control circuit.
The error amplifier exhibits a common-mode
voltage range from -0.3 volts to Vcc -2 volts. The dead-time control
comparator has a fixed offset that provides approximately 5% dead time when externally altered. The on-chip oscillator may be...
