ST UC3843BD1013TR

升压，升压/降压反激，升压7.6V ~ 30V

Overview

The UC284xB 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 off-state.

Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC2842B and UC2844B have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC2843B and UC2845B are 8.5V and 7.9V. The UC2842B and UC2843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC2844B and UC2845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.

Features

Tape & Reel (TR) Package
Transistor Driver Outputs
Switching Frequency: Up to 500kHz
Frequency Control
PULSE WIDTH MODULATION
Max Duty Cycle: 100 %
Frequency: 500kHz

Surface Mount Mounting Type

Applications

There are a lot of STMicroelectronics
UC3843BD1013TR DC to DC converter applications.

• Network technology
• Automation technology
• CMM
• Various precision measuring instruments
• Various precision measuring detectors
• Flaw detection equipment
• Balance equipment
• Industrial robots
• Industrial controllers
• Die casting equipment