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UC1843 Application Note

Part Series:

UC1843 Series

Category:

PWM Controllers

Description:

AC to DC Switching Converter Off-Line Switcher/SMPS Controller 500kHz Tube 8Pin CDIP

Document:

UC1843AJ883B Application Note (3 Pages)

Updated Time: 2023/01/13 01:43:33 (UTC + 8)

UC1843 PWM Controllers Application Note

UC1843AJ883B

Application Note (3 Pages)

2.6

UC1843AJ

Application Note (3 Pages)

2.4

UC1843AL883B

Application Note (3 Pages)

1.7

UC1843AJ883B Specifications

TYPE

DESCRIPTION

Mounting Style

Through Hole

Number of Pins

8 Pin

Case/Package

CDIP

Output Voltage

5 V

Output Current

1 A

UC1843AJ883B Function Overview

●Description

●The UC1842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

●Features

● Optimized for Off-line and DC to DC Converters

● Low Start Up Current (<0.5mA)

● Trimmed Oscillator Discharge Current

● Automatic Feed Forward Compensation

● Pulse-by-Pulse Current Limiting

● Enhanced Load Response Characteristics

● Under-Voltage Lockout With Hysteresis

● Double Pulse Suppression

● High Current Totem Pole Output

● Internally Trimmed Bandgap Reference

● 500kHz Operation