UC1524 Datasheet | Texas Instruments

FEATURES - plete PWM Power Control Circuitry - Unmitted Outputs for Single-Ended or Push-Pull Applications - Low Standby Current . . . 8 m A Typical - Interchangeable With SG1524, SG2524 and SG3524, Respectively DESCRIPTION The UC1524, UC2524 and UC3524 incorporate on a single monolithic chip all the functions required for the construction of regulating power supplies, inverters or switching regulators. They can also be used as the control element for high-power-output applications. The UC1524 family was designed for switching regulators of either polarity, transformer-coupled dc-to-dc converters, transformerless voltage doublers and polarity converter applications employing fixedfrequency, pulse-width modulation techniques. The dual alternating outputs allow either single-ended or push-pull applications. Each device includes an on-chip reference, error amplifier, programmable oscillator, pulse-steering flip-flop, two unmitted output transistors, a high-gain parator, and current-limiting and shut-down circuitry. The UC1524 is characterized for operation over the full military temperature range of - 55°C to 125°C. The UC2524 and UC3524 are designed for operation from - 25°C to 85°C and 0°C to 70°C, respectively. BLOCK DIAGRAM VREF 16 OSC OUT 3 VIN 15 RT 6 CT 7 (RAMP) INV INPUT 1 NI INPUT 2 GROUND 8 REFERENCE OSC +5V Q +5V TO ALL INTERNAL +5V - EA + PARATOR +5V 10k 1k 10 SHUTDOWN 9 PENSATION 12 CA 11 EA 13 CB 14 EB 5 - SENSE CL 4 +SENSE Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1999- 2005, Texas Instruments Incorporated UC1524...