Datasheet > MAX253

MAX253

更新时间： 2024-11-19 14:57:19

品牌	Logo	应用领域
亚德诺 - ADI		变压器驱动驱动器
页数	文件大小	规格书
18页	277K
描述
1W原边变压器H桥驱动器，用于隔离电源

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中文翻译

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数据手册

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MAX253 数据手册

Transformer Driver for

MAX253

Isolated RS-485 Interface

General Description

Benefits and Features

The MAX253 monolithic oscillator/power-driver is

specifically designed to provide isolated power for an

isolated RS-485 or RS-232 data interface. The device

drives a center-tapped transformer primary from a 5V

or 3.3V DC power supply. The secondary can be

wound to provide any isolated voltage needed at power

levels up to 1W.

• Simple Power-Supply Transformer Driver Design for

Isolated RS-485/RS-232 Data-Interface Applications

• Single 5V or 3.3V Supply

• Low-Current Shutdown Mode: 0.4µA

• Pin-Selectable Frequency: 350kHz or 200kHz

• 8-Pin DIP, SO, and µMAX Packages Take Minimal

Board Space

The MAX253 consists of a CMOS oscillator driving a

pair of N-channel power switches. The oscillator runs

at double the output frequency, driving a toggle flip-

flop to ensure 50% duty cycle to each of the switches.

Internal delays are arranged to ensure break-before-

make action between the two switches.

Ordering Information

PART

MAX253CPA

MAX253CSA

MAX253CUA

MAX253C/D

MAX253EPA

MAX253ESA

MAX253ESA/V

MAX253MJA

TEMP RANGE

0°C to +70°C

-40°C to +85°C

-55°C to +125°C

PIN-PACKAGE

8 Plastic DIP

8 SO

The SD pin puts the entire device into a low-power

shutdown state, disabling both the power switches and

oscillator.

8 µMAX

Dice*

8 Plastic DIP

8 SO

Applications

Isolated RS-485/RS-232 Power-Supply

Transformer Driver

8 SO

8 CERDIP**

High Noise-Immunity Communications Interface

Isolated and/or High-Voltage Power Supplies

Bridge Ground Differentials

*Contact factory for dice specifications.

**Contact factory for availability and processing to MIL-STD-883.

Devices are also available in a lead(Pb)-free/RoHS-compliant

package. Specify lead-free by adding a (+) to the part number

when ordering.

Medical Equipment

/V Denotes an automotive qualified part.

Process Control

Typical Operating Circuit

ON / OFF

OUTPUT

5V @ 200mA

MAX253

GND1

GND2

FREQUENCY

SWITCH

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

19-0226; Rev 3; 2/15

12 3 4 5 6 7...18

中文翻译

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与MAX253相关器件

型号	品牌	获取价格	描述	数据表
MAX253_09	MAXIM	获取价格	Transformer Driver for Isolated RS-485 Interface
MAX253_10	MAXIM	获取价格	Transformer Driver for Isolated RS-485 Interface
MAX2530	MAXIM	获取价格	PLASTIC ENCAPSULATED DEVICES
MAX25300A	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300A	ADI	获取价格	12μVRMS, Low-Noise, 500mA LDO Linear Regulato
MAX25300AATA	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300B	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300B	ADI	获取价格	12μVRMS, Low-Noise, 500mA LDO Linear Regulato
MAX25300BATA	MAXIM	获取价格	12Î¼VRMS Low Noise 500mA LDO Linear Regulator
MAX25300EVKIT	MAXIM	获取价格	Two Independent Circuits on One Board

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