HomedatasheetTL3845

TL3845 Datasheet

Current Mode PWM Controllers
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Description

The TL284x and TL3845 series of controlintegrated circuits provide the features that arenecessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes with a minimumnumber of external components. Some of the internally implemented circuits are an undervoltage lockout(UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at theerror amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation(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 when it is in the off state. TL3845 Features &bull; Optimized for Off-Line and dc-to-dc Converters&bull; Low Start-Up Current (<1 mA)&bull; Automatic Feed-Forward Compensation&bull; Pulse-by-Pulse Current Limiting&bull; Enhanced Load-Response Characteristics&bull; Undervoltage Lockout With Hysteresis&bull; Double-Pulse Suppression&bull; High-Current Totem-Pole Output&bull; Internally Trimmed Bandgap Reference&bull; 500-kHz Operation&bull; Error Amplifier With Low Output Resistance&bull; Designed to Be Interchangeable With UC2842 and UC3842 Series
Features

Parameters

[{"Name":"Switching Frequency","Value":"500 kHz "},{"Name":"Rise Time","Value":"50 ns "},{"Name":"Fall Time","Value":"50 ns "},{"Name":"Number of Outputs","Value":"1"},{"Name":"Maximum Operating Temperature","Value":"+ 70 C"},{"Name":"Mounting Style","Value":"SMD/SMT "},{"Name":"Package / Case","Value":"SOIC-14 "},{"Name":"Minimum Operating Temperature","Value":"0 C "},{"Name":"Output Current","Value":"200 mA "},{"Name":"Output Voltage","Value":"0 V to 30 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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