UC2845 Datasheet Fixed Frequency Current Mode Pwm Controller

Manufacturer: UMW

Overview: UMW R UMW UC2842/43/44/45.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Datasheet Details

Part number	UC2845
Manufacturer	UMW
File Size	881.53 KB
Description	fixed frequency current mode PWM controller
Datasheet	UC2845 UC2842 Datasheet (PDF)

General Description

The 2842/43/44/45 are fixed frequency current mode PWM controller.

They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components.

Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totempole output ideally suited for driving a power MOSFET.

Key Features

Pin Connection.
Low Start-Up and Operating Current.
High Current Totem Pole Output.
Undervoltage Lockout With Hysteresis.
Operating Frequency Up To 500KHz Block diagram (toggle flip flop used only in 2844, 2845) V Top view R T Absolute Maximum Ratings Symbol Parameter VCC IO VI ISINK (E. A) Po Tstg TL TA Supply Voltage (low impedance source) Output Current Input Voltage (Analog Inputs pins 2,3) Error Amp Output Sink Current Power Dissipation (TA=250C.

UC2845 Distributor

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More Datasheets from UMW

Part Number	Description
UC2842	fixed frequency current mode PWM controller
UC2843	fixed frequency current mode PWM controller
UC2844	fixed frequency current mode PWM controller