TL594

PWM Controller

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Datasheet

3D Model

Overview

The TL594 PWM Controller 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, this device offers the systems engineer the flexibility to tailor the power-supply control circuitry to a specific application.

The TL594 PWM Controller contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V regulator with a precision of 1.5%, an undervoltage lockout control circuit, and output control circuitry.

The error amplifiers have a common-mode voltage range of -0.3 V to VCC-2 V. The DTC comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can be used to drive the common circuitry in synchronous multiple-rail power supplies.

The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each device provides for push-pull or single-ended output operation, with selection by means of the output-control function. The architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry is operational.
The TL594CD, CN, CDTB are characterized for operation from -40C to 85C.

Applications

Off-line power supply
Buck converter

End Products

VPA (Vehicle Power Adapter)
LED Lighting

Features

Complete Pulse Width Modulation Control Circuitry
On-Chip Oscillator with Master or Slave Operation
On-Chip Error Amplifiers
On-Chip 5.0 V Reference, 1.5% Accuracy
Adjustable Deadtime Control
Uncommitted Output Transistors Rated to 500 mA Source or Sink
Output Control for Push-Pull or Single-Ended Operation
Undervoltage Lockout
Pb-Free Packages are Available
PWM Buck Controller Configuration
Variable Frequency Operation (up to 300 KHz)

Material Composition

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Control Mode

V_CC Min (V)

V_CC Max (V)

f_SW Typ (kHz)

Pricing ($/Unit)

TL594CNG

Obsolete

PDIP-16

648-08

TUBE

500

Push-Pull

Voltage Mode

Price N/A

TL594CDTBR2G

Active

TSSOP-16

948F-01

260

REEL

2500

Push-Pull

Voltage Mode

$0.5897

TL594CDR2G

Active

SOIC-16

751B-05

260

REEL

2500

Push-Pull

Voltage Mode

$0.4157

TL594CDG

Obsolete

SOIC-16

751B-05

260

TUBE

Push-Pull

Voltage Mode

Price N/A

TL594CDTBG

Obsolete

TSSOP-16

948F-01

260

TUBE

Push-Pull

Voltage Mode

Price N/A

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Controllers | TL594

PWM Controller

Overview

Availability & Samples (size)

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