TL5002CD

脉宽调制控制电路 PULSE-WIDTH-MODULATION CONTROL CIRCUIT

description

The TL5002 incorporates on a single monolithic chip all the functions required for a pulse-width-modulation PWM control circuit. Designed primarily for power-supply control, the TL5002 contains an error amplifier, a regulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout UVLO, and an open-collector output transistor. The error-amplifier input common-mode voltage ranges from 0.9 V to 1.5 V. Dead-time control DTC can be set to provide 0% to 100% dead time by connecting an external resistor between DTC and GND. The oscillator frequency is set by terminating RT with an external resistor to GND. During low VCC conditions, the UVLO circuit turns the output off until VCC recovers to its normal operating range. The TL5002 is characterized for operation from –40°C to 85°C.

Complete PWM Power Control

3.6-V to 40-V Operation

Internal Undervoltage-Lockout Circuit

Oscillator Frequency . . . 20 kHz to 500 kHz

Variable Dead Time Provides Control Over Total Range

Ideal Controller for DDR Memory Application

Uncommitted Error Amplifier Inputs