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 and analog semiconductor markets. Diodes Incorporated primarily serves the computing, consumer, communications, industrial and automotive segments. Diodes’ diverse product portfolio includes parts for LCD/LED TVs and displays, desktop, notebook and tablet computing, smartphones and hand-held devices, set-top boxes, power supplies and USB protection as well as many other application areas.

Diodes Incorporated offers a wide array of products including diodes, rectifiers, transistors, MOSFETs, gate drivers, protection devices, function-specific arrays, amplifiers and comparators, Hall-effect sensors and temperature sensors, power management devices including LED drivers, AC-DC converters and controllers, DC-DC switching regulators, linear voltage regulators, current monitors, and voltage reference and shunt regulators, along with special function devices including USB power switches, load switch devices, voltage supervisors and motor controllers.


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