TL1464I Datasheet | Texas Instruments

TL1464I QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT D High-Speed Drive Controller for PNP Power Transistor D Internal-Regulator Provides a Stable 1.5 V Reference Supply D Low Start-Up Voltage 3.1 V SLVS266 - FEBRUARY 2000 D Internal Short-Circuit Protection D Internal Undervoltage Lockout Protection D Internal Shut-Down Circuit by Channel D 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 parators, 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. FUNCTION TABLE INPUTS OUTPUT FUNCTIONS STANDBY STANDBY-2 TO4 VREF OUTPUT-1 OUTPUT-2 OUTPUT-3 OUTPUT-4 VI ≤ 0.4 V VI ≤ 0.4 V, VI ≥ 2.4 V VI ≥ 2.4 V VI ≥ 2.4 V VI ≥ 0.4 V See Note See Note See Note NOTE: When the STANDBY input is high (≥ 2.4 V), OUTPUT-2 to 4 are controlled individually. If STANDBY-2 input is low (≤ 0.4 V), OUTPUT-2 is turned off. When CH-2 standby mode is released, CH-2 can do the soft-start...