UC2843BDG Current-Mode PWM Controller 500kHz Operation High Drive Output Wide 8V-30V Input Precision Reference Low Cost Robust Protection Versatile for Power Supplies

UC2843BDG Current-Mode PWM Controller 500kHz Operation High Drive Output Wide 8V-30V Input Precision Reference Low Cost Robust Protection Versatile for Power Supplies

Features

• Trimmed Oscillator for Precise Frequency Control

• Oscillator Frequency Guaranteed at 250 kHz

• Current Mode Operation to 500 kHz

• Automatic Feed Forward Compensation

• Latching PWM for Cycle−By−Cycle Current Limiting

• Internally Trimmed Reference with Undervoltage Lockout

• High Current Totem Pole Output

• Undervoltage Lockout with Hysteresis

• Low Startup and Operating Current

• This is a Pb−Free and Halide−Free Device

Applications

1:Off-line switching power supplies (AC-DC converters): Power adapters (e.g., laptops, monitors), industrial power systems, consumer electronics (TVs, audio equipment).

2:DC-DC converters: Boost converters (battery voltage step-up), flyback converters (isolated power supplies up to 100W-150W).

Description

The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and DC−DC converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, programmable output deadtime, and a latch for single pulse metering.

These devices are available in an 8−pin dual−in−line and surface mount (SOIC−8) plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage.

The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off−line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).

INFORMATION

Drawing

Our advantage :phones, PDA's, notebook comput.ers

• High quality products --- our offers are 100% new and original, ROHS
• Competitive price --- good Purchase channels with good price.
• Professional service --- strict quality testing before the shipment, and perfect after-sales service after the purchase.
• Adequate inventory --- With the support of our strong Purchasing team,
• Fast delivery --- we will ship the goods within 1-3 working days after the payment confirmed.

be sure to meet your need for all kinds of components. ^_^


Product List
Supply a Series of Electronic Components, full range of semiconductors, active & passive Components.We can help you to get all for bom of the PCB,IN a word, you can get one-stop solution here,


The offers including:
Integrated Circuit, Memory ICs, Diode, Transistor , Capacitor, Resistor, Varistor, Fuse, Trimmer & Potentiometer, Transformer, Battery, Cable, Relay, Switch, Connector, Terminal Block, Crystal & Oscillator, Inductor, Sensor, Transformer, IGBT Driver, LED,LCD, Convertor, PCB (Printed Circuit Board),PCBA (PCB Assembly)

Strong in Brand:
Microchip, MAX, AD, TI, ATMEL, ST, ON, NS, Intersil, Winbond, Vishay, ISSI, Infineon, NEC, FAIRCHILD, OMRON,YAGEO, TDK, etc

Thank you for your time to know our company and lean our production.

TOP Electronic Industry co., Ltd was established in 2006. After 10 years effort and development, now we have become one of the leading electronic components distributors in China. We keep very kind relationship with our suppliers and partners, and put our customers in the first place always.

Here we can offer one-stop solution service: from PCB design, production to PCB assembly, from a series of components offer to the BOM list.

In addition to its component supply service, TOP distributes industry respected communication modules(GPS,GSM/GPRS,3G,LTE 4G modules) and accessories. All the brands are very famous and welcome by the customers all over the world, they are including: Sierra Wireless, SIMCOM, CINTERION, U-BLOX, HUAWEI, ZTE,TELIT, HOLUX etc. competitive price, Adequate inventory, fast delivery, be praised by all the customers .

As an innovative company, TOP supplies and markets high-quality wireless communication antennas and RF-cables. to work with modules together. With more than 8 years antenna experience, we win a lot of stable customers from more than 50 countries. In order to save the cost and delivery time, control the quality, supply the competitive price for our customers, we built our own antenna factory in 2012,which is for developing and manufacturing GPS antenna, GSM/GPRS antenna, WIFI antenna, LTE antenna, all kinds of combo antennas etc. Quality, stability, accessibility are all important to us.

The third production-line is Supply a Series of Electronic Components, including Integrated Circuits, Transistor, Diode, LED, LCD display, Capacitor, Resistor, Inductor, Relay, Crystal , Terminal block ,pin header etc.

Our Strong in Brand including Microchip, MAX, AD, TI, NXP, ATMEL, ST, ON, NS, Intersil, Winbond, Vishay, ISSI, Infineon, NEC, FAIRCHILD, OMRON,YAGEO, TDK, etc

As a global distributor of electronic components, we stocking the world's widest range products of semiconductor and electronic components. You can get one stop service here include BOM(bill of material) purchasing, testing, design for your project. Our experienced team is providing the most excellent service to meet your needs and satisfaction.

With rich experience on wireless product and electronic components, we win our customers with good quality and competitive price. We only offer the products 100% original from the factory.

TOP has never stop going forward, we always want to give our customers best service. in 2013, together with our partners, we built another PCB factory. In this factory, we can make design, supply PCB, make PCB SMT and DIP assembly, offer BOM service. As a professional supplier , We have a strong procurement team and are therefore able to provide customers with competitive prices and good quality. This is our advantage to you.

As they are to you. Just as in our name, TOP strives to be a leading business in the electronic industry. Our high quality products and professional service, are sure to meet your need for all kinds of electronic components.

You are searching for creditable and professional supplier to work with; we are also looking for sincerely and long-term customers. Once we find each other, we could make rapid progress together!