MAX5021

电流模式PWM控制器,用于隔离型电源

SOT23通用离线式电源控制器


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说明

The MAX5021/MAX5022 current-mode PWM controllers contain all the control circuitry required for the design of wide input voltage range isolated power supplies. These devices are well suited for use in universal input (85VAC to 265VAC) off-line or telecom (-36VDC to -72VDC) power supplies.

An undervoltage lockout (UVLO) circuit with large hysteresis coupled with low startup and operating current reduce power dissipation in the startup resistor and allow use of ceramic bypass capacitors. The 262kHz switching frequency is internally trimmed to }12% accuracy; this allows the optimization of the magnetic and filter components resulting in compact, cost-effective power supplies. The MAX5021 with 50% maximum duty cycle and MAX5022 with 75% maximum duty cycle are recommended for forward converters and flyback converters, respectively. The MAX5021/MAX5022 are available in 6-pin SOT23, 8-pin µMAX, and 8-pin DIP packages and are rated for operation over the -40‹C to +85‹C temperature range.
MAX5021、MAX5022:典型工作电路 MAX5021、MAX5022:典型工作电路 放大+

关键特性

  • Available in a Tiny 6-Pin SOT23 Package
  • 50µA Typical Startup Current
  • 1.2mA Typical Operating Current
  • Large UVLO Hysteresis of 14V
  • Fixed Switching Frequency of 262kHz ±12%
  • 50% Maximum Duty Cycle Limit (MAX5021)
  • 75% Maximum Duty Cycle Limit (MAX5022)
  • 60ns Cycle-by-Cycle Current-Limit Response Time

应用

  • 隔离型电源
  • 低功耗电信电源
  • 移动电话充电器
  • 待机电源
  • 通用离线电源
Part NumberApplication (VIN)VIN
(V)
VIN
(V)
TopologyFeedbackFreq.
(kHz)
Duty Cycle
(%)
ISTARTUP
(mA)
ICC
(mA)
Gate Drive Current
(A)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxmaxmaxmaxmaxSee Notes
MAX5021 
Networking (48V)
Power Over Ethernet (32-58V)
Telecom (36-72V)
Universal Off-line (90-240VAC)
241000Single-Ended ForwardOpto262500.0852.430.25-40 to +85
PDIP/8
SOT23/6
UMAX/8
$0.48 @1k
MAX5022 Flyback75
PDIP/8
SOT23/6
UMAX/8
$0.69 @1k
查看所有Isolated Power Supplies (25)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX5022EVKIT: MAX5022评估板

技术资料

应用笔记 4033 可编程风扇控制器
应用笔记 1062 设计紧凑的电信电源
设计指南 967 How to Minimize Power Dissipation in Li+ Linear Chargers

质量和环境数据

申请可靠性报告: MAX5021 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX5021EUA+
  • MAX5021EUT+
  • MAX5021EUT+T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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