回到顶部

1W原边变压器H桥驱动器,用于隔离电源

产品详情

主要特征

Parametric specs for Transformer Drivers
VIN (V) (min) 2.5
VIN (V) (max) 6
Driver Output Resistance (Ω) (max) 4
Max. IOUT (A) 0.2
Topology Push-Pull
Switching Frequency (kHz) 350
ICC (mA) (max) 0.45
Package/Pins CDIP/8
PDIP/8
SOIC (N)/8
UMAX/8
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Budgetary
Price (See Notes)
1.66
缩小

简化框图

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

参量

Parametric specs for Transformer Drivers
VIN (V) (min) 2.5
VIN (V) (max) 6
Driver Output Resistance (Ω) (max) 4
Max. IOUT (A) 0.2
Topology Push-Pull
Switching Frequency (kHz) 350
ICC (mA) (max) 0.45
Package/Pins CDIP/8
PDIP/8
SOIC (N)/8
UMAX/8
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Budgetary
Price (See Notes)
1.66

主要特征

  • 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

应用/用途

  • 桥接地电位差
  • 高噪声抑制通信接口
  • 隔离型和/或高压电源
  • 隔离型RS-485/RS-232电源
  • 医疗装置
  • 过程控制
  • 变压器驱动器

描述

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.

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.

The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.

简化框图

MAX253:典型工作电路 MAX253:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心