Hardware, Tools...
Semiconductor & Sensor
Other Comp. & Accessori
 
 LEDs
 
Visitors
Visitors Online : 125
Total accessing: 3896324
 
Filter by Manufacturer

PWM / PFC Power-Control Circuitry

Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a commonly used technique for controlling power to inertial electrical devices, made practical by modern electronic power switches

 

Semiconductor & Sensor >
Images are for reference only, Please See Product Specifications
Images are for reference only, Please See Product Specifications
(Click image to see the correct size)
UC3856N
UC3856N (Update 27/06/2014)
Part No.:  UC3856N
Date added::  12/04/2012
Origin:  Genuine
Package:  DIP(16)
Category:  PWM Control
Pricing: 
Quantity (pcs)1 - 9 10 - 24 25 - 49 50 - 99 100+
Unit price (VNĐ) 110,000 104,500 99,000 93,500 88,000
Product Unit:  pcs
In stock:  29 pcs
Views:  4766
Quantity: 
  1. Product information
UC3856N - Improved Current Mode PWM Controller  DataSheet

Features
  • Pin-for-Pin Compatible With the UC3846
  • 65ns Typical Delay From Shutdown to Outputs, and 50ns Typical Delay From Sync to Outputs
  • Improved Current Sense Amplifier With Reduced Noise Sensitivity
  • Differential Current Sense with 3V Common Mode Range
  • Trimmed Oscillator Discharge Current for Accurate Deadband Control
  • Accurate 1V Shutdown Threshold
  • High Current Dual Totem Pole Outputs (1.5A peak)
  • TTL Compatible Oscillator SYNC Pin Thresholds
  • 4kV ESD Protection

Description

The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity.