Controllers | TL594

PWM Controller

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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.

  • Off-line power supply
  • Buck converter

  • VPA (Vehicle Power Adapter)
  • LED Lighting

  • 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)

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TL594CDR2G

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CAD Model

Pb

A

H

P

SOIC-16

751B-05

1

260

REEL

2500

N

Flyback

Forward

Push-Pull

1

Voltage Mode

6

42

40

$0.4569

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TL594CDTBR2G

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CAD Model

Pb

A

H

P

TSSOP-16

948F-01

1

260

REEL

2500

N

Flyback

Forward

Push-Pull

1

Voltage Mode

6

42

40

$0.5897

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Reliability Data

Die Related Summary Data

Device: TL594CDR2G

Equivalent to wafer fab process: BP STD LINEAR

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

BP STD LINEAR

10

12120914040

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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