TL598

アクティブ

パルス幅変調 (PWM) 制御回路

ご注文はこちら

データシート

document-pdfAcrobat TL598 データシート (Rev. D) (英語)

TL598

アクティブ

データシート

ご注文はこちら

製品詳細

Rating

Catalog

Topology

Boost

Vin (max) (V)

40

Control mode

Voltage

Features

Adjustable switching frequency, Error amplifier, Multi-topology

Operating temperature range (°C)

0 to 70

Duty cycle (max) (%)

45

Rating

Catalog

Topology

Boost

Vin (max) (V)

40

Control mode

Voltage

Features

Adjustable switching frequency, Error amplifier, Multi-topology

Operating temperature range (°C)

0 to 70

Duty cycle (max) (%)

45

PDIP (N)

16

181.42 mm² 19.3 x 9.4

SOIC (D)

16

59.4 mm² 9.9 x 6

Complete PWM Power-Control Function
Totem-Pole Outputs for 200-mA Sink or Source Current
Output Control Selects Parallel 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, Trimmed to 1% Tolerance
On-Board Output Current-Limiting Protection
Undervoltage Lockout for Low V_CC Conditions
Separate Power and Signal Grounds

Complete PWM Power-Control Function
Totem-Pole Outputs for 200-mA Sink or Source Current
Output Control Selects Parallel 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, Trimmed to 1% Tolerance
On-Board Output Current-Limiting Protection
Undervoltage Lockout for Low V_CC Conditions
Separate Power and Signal Grounds

The TL598 incorporates all the functions required in the construction of pulse-width-modulated (PWM) controlled systems on a single chip. Designed primarily for power-supply control, the TL598 provides the systems engineer with the flexibility to tailor the power-supply control circuits to a specific application.

The TL598 contains two error amplifiers, an internal oscillator (externally adjustable), a dead-time control (DTC) comparator, a pulse-steering flip-flop, a 5-V precision reference, undervoltage lockout control, and output control circuits. Two totem-pole outputs provide exceptional rise- and fall-time performance for power FET control. The outputs share a common source supply and common power ground terminals, which allow system designers to eliminate errors caused by high current-induced voltage drops and common-mode noise.

The error amplifier has a common-mode voltage range of 0 V to VCC - 2 V. The DTC comparator has a fixed offset that prevents overlap of the outputs during push-pull operation. A synchronous multiple supply operation can be achieved by connecting RT to the reference output and providing a sawtooth input to CT.

The TL598 device provides an output control function to select either push-pull or parallel operation. Circuit architecture prevents either output from being pulsed twice during push-pull operation. The output frequency for push-pull applications is one-half the oscillator frequency (f_o=1/2 RT CT). For single-ended applications: (f_o=1/RT CT)

The TL598 incorporates all the functions required in the construction of pulse-width-modulated (PWM) controlled systems on a single chip. Designed primarily for power-supply control, the TL598 provides the systems engineer with the flexibility to tailor the power-supply control circuits to a specific application.

The TL598 contains two error amplifiers, an internal oscillator (externally adjustable), a dead-time control (DTC) comparator, a pulse-steering flip-flop, a 5-V precision reference, undervoltage lockout control, and output control circuits. Two totem-pole outputs provide exceptional rise- and fall-time performance for power FET control. The outputs share a common source supply and common power ground terminals, which allow system designers to eliminate errors caused by high current-induced voltage drops and common-mode noise.

The error amplifier has a common-mode voltage range of 0 V to VCC - 2 V. The DTC comparator has a fixed offset that prevents overlap of the outputs during push-pull operation. A synchronous multiple supply operation can be achieved by connecting RT to the reference output and providing a sawtooth input to CT.

The TL598 device provides an output control function to select either push-pull or parallel operation. Circuit architecture prevents either output from being pulsed twice during push-pull operation. The output frequency for push-pull applications is one-half the oscillator frequency (f_o=1/2 RT CT). For single-ended applications: (f_o=1/RT CT)

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