Texas Instruments announces the TL5001, our newest low-cost PWM (pulse width modulation) controller designed specifically for portable consumer and computer electronics.
Power supply designers reap the benefits of the TL5001's simplified design, replacing more complicated PWM controllers. Typical applications include: LCD backlight supplies, 5 V-to-3.3 V step down regulators for mixed-voltage systems, and Vpp generators. The TL5001 is easily configured in step-up, step-down, and flyback topologies to generate positive supplies from a single battery pack.
Battery-powered portables take advantage of the TL5001's low quiescent current (1.4 mA typ) and low start-up voltage (3.6 V), allowing longer lifetime from a single charge. Battery charger circuits can also benefit from its extended input voltage range of up to 40 V.
Designers get added flexibility with features like internal short-circuit protection circuitry and 100% dead-time control for flyback and boost topologies.
The TL5001's 20-mA output drive reduces component count by eliminating the need for external gate drive circuitry. Improved efficiency and smaller external component size are two more benefits of operating the TL5001 at higher frequencies (up to 400 kHz).
Added space savings are realized with the TL5001's reduced pin count. Offered in 8-pin surface mount and plastic DIP packages, the TL5001 is the low cost choice for switched-mode power supply circuits.
Vol 11, Spring, 1995