HomedatasheetUC3845BD1013

UC3845BD1013 Datasheet

Current Mode PWM Controllers
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Description

The UC3845BD1013 family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control,and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the offstate. UC3845BD1013 Features • TRIMMED OSCILLATOR FOR PRECISE FRE- QUENCY CONTROL• OSCILLATOR FREQUENCY GUARANTEED AT 250kHz• CURRENT MODE OPERATION TO 500kHz• AUTOMATIC FEED FORWARD COMPENSA. TION• LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING• INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT• HIGH CURRENT TOTEM POLE OUTPUT• UNDERVOLTAGE LOCKOUT WITH HYSTER. ESIS• LOW START-UP AND OPERATING CURRENT
Features

Parameters

[{"Name":"Switching Frequency","Value":"500 kHz "},{"Name":"Rise Time","Value":"50 ns "},{"Name":"Fall Time","Value":"50 ns "},{"Name":"Operating Supply Voltage","Value":"30 V"},{"Name":"Number of Outputs","Value":"1"},{"Name":"Maximum Operating Temperature","Value":"+ 150 C "},{"Name":"Mounting Style","Value":"SMD/SMT "},{"Name":"Package / Case","Value":"SO-8 "},{"Name":"Minimum Operating Temperature","Value":"- 40 C "},{"Name":"Output Current","Value":"1000 mA "},{"Name":"Output Voltage","Value":"4.90 V to 5.10 V "},{"Name":"Packaging","Value":"Reel "}]

Manufacturer information

DIODES INCORPORATED

Diodes Incorporated is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, analog and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.
Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.
Diodes’ corporate headquarters and Americas’ sales office are located in Plano, Texas and Milpitas, California. Design, marketing, and engineering centers are located in Plano; Milpitas; Taipei, Taiwan; Taoyuan City, Taiwan; Zhubei City, Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer fabrication facilities are located in Manchester and Shanghai, China. Diodes has assembly and test facilities located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well as in Hong Kong, Neuhaus and Taipei. Additional engineering, sales, warehouse, and logistics offices are located in Taipei; Hong Kong; Manchester; Shanghai; Shenzhen, China; Seongnam-si, South Korea; and Munich, Germany, with support offices throughout the world.

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