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說明

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.

特性

• 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