High-Speed Drive Controller for PNP Power

Transistor

Internal-Regulator Provides a Stable 1.5 V

Reference Supply

Low Start-Up Voltage 3.1 V

Internal Short-Circuit Protection

Internal Undervoltage Lockout Protection

Internal Shut-Down Circuit by Channel

Controllable Base Current of External

Transistor

description

The TL1464I incorporates on a single monolithic chip all the functions required in the construction of a

pulse-width-modulation control circuit. Designed primarily for power supply control, the TL1464I contains an

on-chip 1.5 V regulator, four error amplifiers, an oscillator, two dead-time comparators, undervoltage lockout

circuitry, short circuit protection, standby control circuitry, and output circuits.

The external speed-up capacitors provide exceptional rise and fall time performance for the PNP power

transistor.

The TL1464I operates from 3.1 V supply voltage and 2 pair of four-outputs (CH-1/CH-3, CH-2/CH-4 the same

period) at the inverse phase of each other. As a result, the TL1464I provides high-efficiency power supply.