MAX5071 Maxim Integrated Products, MAX5071 Datasheet

MAX5071

Manufacturer Part Number

MAX5071

Description

(MAX5070 / MAX5071) Current-Mode PWM Controllers

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX5071.pdf (22 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX5071CAUA+

Manufacturer:

Maxim Integrated Products

Quantity:

135

Current page: 1 of 22
Download datasheet (414Kb)

www.DataSheet4U.com

The MAX5070/MAX5071 BiCMOS, high-performance,

current-mode PWM controllers have all the features

required for wide input voltage range isolated/nonisolated

power supplies. These controllers are used for low- and

high-power universal input voltage and telecom power

supplies.

The MAX5070/MAX5071 contain a fast comparator with

only 60ns typical delay from current sense to the output

for overcurrent protection. The MAX5070A/MAX5070B

have an integrated error amplifier with the output at

COMP. Soft-start is achieved by controlling the COMP

voltage rise using external components.

The frequency is adjustable from 20kHz to 1MHz with

an external resistor and capacitor. The timing capacitor

discharge current is trimmed allowing for programma-

ble dead time and maximum duty cycle for a given fre-

quency. The available saw-toothed waveform at R

can be used for slope compensation when needed.

The MAX5071A/MAX5071B include a bidirectional syn-

chronization circuit allowing for multiple controllers to

run at the same frequency to avoid beat frequencies.

Synchronization is accomplished by simply connecting

the SYNC pins of all devices together. When synchro-

nizing with other devices, the MAX5071A/MAX5071B

with the highest frequency synchronizes the other

devices. Alternatively, the MAX5071A/MAX5071B can

be synchronized to an external clock with an open-

drain output stage running at a higher frequency.

The MAX5071C provides a clock output pulse

(ADV_CLK) that leads the driver output (OUT) by

110ns. The advanced clock signal is used to drive the

secondary-side synchronous rectifiers.

The MAX5070/MAX5071 are available in 8-pin µMAX

and SO packages and operate over the automotive tem-

perature range of -40°C to +125°C.

19-3283; Rev 3; 10/06

µMAX is a registered trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

High-Performance, Single-Ended, Current-Mode

Universal Input AC/DC Power Supplies

Isolated Telecom Power Supplies

Isolated Power-Supply Modules

Networking Systems

Computer Systems/Servers

Industrial Power Conversion

Isolated Keep-Alive Circuits

________________________________________________________________ Maxim Integrated Products

General Description

Applications

♦ Pin-for-Pin Replacement for UC2842 (MAX5070A)

♦ 2A Drive Source and 1A Sink Capability

♦ Up to 1MHz Switching Frequency Operation

♦ Bidirectional Synchronization

♦ Advanced Output Drive for Secondary-Side

♦ Fast 60ns Cycle-by-Cycle Current Limit

♦ Trimmed Oscillator Capacitor Discharge Current

♦ Accurate 5% Start and Stop Voltage with 6V

♦ Low 32µA Startup Current

♦ 5V Regulator Output (VREF) with 20mA Capability

♦ Overtemperature Shutdown

Ordering Information continued at end of data sheet.

Selector Guide appears at end of data sheet.

Specify lead-free by adding the + symbol at the end of the part

number when ordering.

MAX5070AASA

MAX5070AAUA

MAX5070BASA

MAX5070BAUA

Pin Configurations continued at end of data sheet.

and UC2844 (MAX5070B)

(MAX5071A/MAX5071B)

Synchronous Rectification (MAX5071C)

Sets Maximum Duty Cycle Accurately

Hysteresis

TOP VIEW

PART

COMP

PWM Controllers

-40°C to +125°C

TEMP RANGE

Ordering Information

µMAX/SO

MAX5070A

MAX5070B

Pin Configurations

VREF

OUT

GND

PIN-PACKAGE

8 SO

8 µMAX

8 SO

8 µMAX

Features

Related parts for MAX5071

Related keywords

MAX5071 datasheet
MAX5071 data sheet
MAX5071 pdf datasheet
MAX5071 component
MAX5071 part
MAX5071 distributor
MAX5071 RoHS
MAX5071 datasheet download