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The TL594 device 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 device 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%, an undervoltage lockout control circuit, and output control circuitry.
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.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TL594D | SOIC (16) | 9.90 mm × 3.91 mm |
TL594N | PDIP (16) | 19.30 mm × 6.35 mm |
TL594NS | SO (16) | 10.30 mm × 5.30 mm |
TL594PW | TSSOP (16) | 5.00 mm × 4.40 mm |
Changes from H Revision (January 2014) to I Revision
Changes from G Revision (January 2007) to H Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | 1IN+ | I | Noninverting input to error amplifier 1 |
2 | 1IN– | I | Inverting input to error amplifier 1 |
3 | FEEDBACK | I | Input pin for feedback |
4 | DTC | I | Dead-time control comparator input |
5 | CT | — | Capacitor terminal used to set oscillator frequency |
6 | RT | — | Resistor terminal used to set oscillator frequency |
7 | GND | — | Ground |
8 | C1 | O | Collector terminal of BJT output 1 |
9 | E1 | O | Emitter terminal of BJT output 1 |
10 | E2 | O | Emitter terminal of BJT output 2 |
11 | C2 | O | Collector terminal of BJT output 2 |
12 | VCC | — | Positive supply |
13 | OUTPUT CTRL | I | Selects single-ended, parallel output, or push-pull operation |
14 | REF | O | 5-V reference regulator output |
15 | 2IN– | I | Inverting input to error amplifier 2 |
16 | 2IN+ | I | Noninverting input to error amplifier 2 |