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MAX5942BCSE

更新时间： 2024-11-22 22:55:19

品牌	Logo	应用领域
美信 - MAXIM		稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管信息通信管理以太网
页数	文件大小	规格书
24页	464K
描述
IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices

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MAX5942BCSE 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOP, SOP16,.25	针数：	16
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.22
Is Samacsys：	N	其他特性：	N
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	67 V
最小输入电压：	18 V	标称输入电压：	48 V
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e0
长度：	9.9 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	16
最高工作温度：	70 °C	最低工作温度：
最大输出电流：	1 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装等效代码：	SOP16,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	245	认证状态：	Not Qualified
座面最大高度：	1.75 mm	子类别：	Switching Regulator or Controllers
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	314 kHz	技术：	BICMOS
温度等级：	COMMERCIAL	端子面层：	Tin/Lead (Sn85Pb15)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3.9 mm	Base Number Matches：	1

MAX5942BCSE 数据手册

19-3024; Rev 0; 10/03

IEEE 802.3af Power-Over-Ethernet

Interface/PWM Controller for Power Devices

General Description

Features

The MAX5942A/MAX5942B integrate a complete power

IC for powered devices (PD) in a power-over-ethernet

(PoE) system. The MAX5942A/MAX5942B provide a PD

interface and a compact DC-DC PWM controller suitable

for flyback and forward converters in either isolated or

nonisolated designs.

o Powered Device Interface

Fully Integrated IEEE 802.3af-Compliant PD

Interface

PD Detection and Programmable Classification

Signatures

Less than 10µA Leakage Current Offset During

Detection

Integrated MOSFET for Isolation and Inrush

Current Limiting

Gate Output Allows External Control of the

Internal Isolation FET

Programmable Inrush Current Control/ULVO

PGOOD/PGOOD Outputs Enable PWM

Controller

The MAX5942A/MAX5942B PD interface complies with

the IEEE 802.3af standard, providing the PD with a detec-

tion signature, a classification signature, and an integrat-

ed isolation switch with programmable inrush current

control. These devices also feature power-mode under-

voltage lockout (UVLO) with wide hysteresis and power-

good status outputs.

The MAX5942A/MAX5942B also integrate all the build-

ing blocks necessary for implementing DC-DC fixed-

frequency isolated power supplies. This device is a

current-mode controller with an integrated high startup

circuit suitable for isolated telecom/industrial voltage

range power supplies. A high-voltage startup circuit

allows the PWM controller to draw power directly from the

18V to 67V input supply during startup. The switching

frequency is internally trimmed to 275kHz 10ꢀ, thus

reducing magnetics and filter components. The

MAX59412A allows an 85ꢀ operating duty cycle and can

be used to implement flyback converters. The MAX5942B

limits the operating duty cycle to less than 50ꢀ and can

be used in single-ended forward converters. The

MAX5942A/MAX5942B are designed to work with or with-

out an external diode bridge in front of the PD.

o PWM Controller

Wide Input Range: 18V to 67V

Isolated (Without Optocoupler) or Nonisolated

Power Supply

Current-Mode Control

Leading-Edge Blanking

Internally Trimmed 275kHz 10ꢀ Oscillator

Soft-Start

Ordering Information

PIN-

MAX DUTY

PACKAGE CYCLE (ꢀ)

PART

TEMP RANGE

MAX5942AESE* -40°C to +85°C

MAX5942ACSE 0°C to +70°C

MAX5942BESE* -40°C to +85°C

MAX5942BCSE

*Future product—contact factory for availability.

16 SO

The MAX5942A/MAX5942B are available in 16-pin SO

packages.

Applications

0°C to +70°C 16 SO

IP Phones

Wireless Access Nodes

Internet Appliances

Computer Telephony

Security Cameras

Pin Configuration

TOP VIEW

V+

16 V

Power Devices in Power-Over-Ethernet/

Power-Over-MDI

15 NDRV

14 V-

SS_SHDN

ULVO

MAX5942A

MAX5942B

13 CS

12 GND

11 PGOOD

10 PGOOD

RCL

Typical Operating Circuit appears at end of data sheet.

GATE

OUT

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7...24

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MAX5942BCSE 替代型号

型号	品牌	替代类型	描述	数据表
MAX5942BCSE-T	MAXIM	功能相似	Switching Controller, Current-mode, 1A, 314kHz Switching Freq-Max, BICMOS, PDSO16, 0.150 I

与MAX5942BCSE相关器件

型号	品牌	获取价格	描述	数据表
MAX5942BCSE+T	MAXIM	获取价格	Switching Controller, Current-mode, 1A, 314kHz Switching Freq-Max, BICMOS, PDSO16, 0.150 I
MAX5942BCSE-T	MAXIM	获取价格	Switching Controller, Current-mode, 1A, 314kHz Switching Freq-Max, BICMOS, PDSO16, 0.150 I
MAX5942BESE-T	MAXIM	获取价格	Switching Controller, Current-mode, 1A, 314kHz Switching Freq-Max, BICMOS, PDSO16, 0.150 I
MAX5943	MAXIM	获取价格	FireWire Current Limiter and Low-Drop ORing Switch Controller
MAX5943	ADI	获取价格	FireWire限流器与低压差“或”逻辑开关控制器
MAX5943_07	MAXIM	获取价格	FireWire Current Limiter and Low-Drop ORing Switch Controller
MAX5943AEEE	MAXIM	获取价格	FireWire Current Limiter and Low-Drop ORing Switch Controller
MAX5943AEEE	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, 0.150 INCH, 0.025 INCH PITCH, MO-137-AB, QSOP-
MAX5943AEEE+	MAXIM	获取价格	暂无描述
MAX5943AEEE+T	MAXIM	获取价格	暂无描述

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