脉宽调制控制电路 PULSE-WIDTH-MODULATION CONTROL CIRCUITS
> The TL494 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 flexibility to tailor the power-supply control circuitry to a specific application.
FEATURES
1. Complete PWM Power-Control Circuitry
2. Uncommitted Outputs for 200-mA Sink or Source Current
3. Output Control Selects Single-Ended or Push-Pull Operation
4. Internal Circuitry Prohibits Double Pulse at Either Output
5. Variable Dead Time Provides Control Over Total Range
6. Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance
7. Circuit Architecture Allows Easy Synchronization