Datasheet Texas Instruments TL1464 — Ficha de datos

TL1464I
QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS266 – FEBRUARY 2000 D
D
D D
D
D
D 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 …