MAX5094B MAXIM [Maxim Integrated Products], MAX5094B Datasheet

MAX5094B

Manufacturer Part Number

MAX5094B

Description

High-Performance, Single-Ended, Current-Mode PWM Controllers

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.MAX5094B.pdf (22 pages)

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Meier Automation Equipment Co., Limited

Part Number:

MAX5094BASA+

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MAXIM/美信

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20 000

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Download datasheet (297Kb)

The MAX5094A/B/C/D/MAX5095A/B/C 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 volt-

age and telecom power supplies.

The MAX5094/MAX5095 contain a fast comparator with

only 60ns typical delay from current sense to the output

for overcurrent protection. The MAX5094 has an inte-

grated error amplifier with the output at COMP. Soft-

start is achieved by controlling the COMP voltage rise

using external components.

The oscillator frequency is adjustable from 20kHz to

1MHz with an external resistor and capacitor. The tim-

ing capacitor discharge current is trimmed allowing for

programmable dead time and maximum duty cycle for

a given frequency. The available saw-toothed waveform

at R

needed.

The MAX5095A/MAX5095B 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 of all devices together. When synchronizing

with other devices, the MAX5095A/MAX5095B with the

highest frequency synchronizes the other devices.

Alternatively, the MAX5095A/MAX5095B can be syn-

chronized to an external clock with an open-drain out-

put stage running at a higher frequency.

The MAX5095C 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 MAX5094A/B/C are available in the 8-pin SO and

8-pin µMAX

MAX5095A/B/C are available in the 8-pin µMAX pack-

age. All devices operate over the automotive tempera-

ture range of -40°C to +125°C.

19-3864; 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

can be used for slope compensation when

packages. The MAX5094D and

________________________________________________________________ Maxim Integrated Products

General Description

Applications

♦ Pin-for-Pin Replacement for UCC28C43

♦ 2A Drive Source and 1A Sink Capability

♦ Up to 1MHz Switching Frequency Operation

♦ Bidirectional Frequency Synchronization

♦ Advanced Output Drive for Secondary-Side

♦ Fast 60ns Cycle-by-Cycle Current Limit

♦ Trimmed Oscillator Capacitor Discharge Current

♦ Accurate ±5% Start Voltage with 0.8V Hysteresis

♦ Low 32µA Startup Current

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

♦ Versions with 0.3V Current-Sense Threshold

♦ Overtemperature Shutdown

+Denotes lead-free package.

*Future product—contact factory for availability.

Ordering Information continued at end of data sheet.

MAX5094AASA+

MAX5094AAUA+

MAX5094BASA+

MAX5094BAUA+

MAX5094AASA

MAX5094AAUA*

MAX5094BASA*

MAX5094BAUA*

Pin Configurations continued at end of data sheet.

(MAX5094A) and UCC28C45 (MAX5094B)

(MAX5095A/MAX5095B)

Synchronous Rectification (MAX5095C)

Sets Maximum Duty Cycle Accurately

PART

TOP VIEW

PWM Controllers

COMP

-40°C to +125°C

TEMP RANGE

Ordering Information

MAX5094

MAX/SO

Pin Configurations

PIN-

PACKAGE

8 SO

8 µMAX

8 SO

8 µMAX

REF

OUT

GND

Features

CODE

PKG

S8-4

U8-1

S8-4

U8-1

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