MAX5021：电流模式PWM控制器，用于隔离型电源 _ BDTIC 中国领先电子元器件代理商

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

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.

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

MAX5021、MAX5022：典型工作电路

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

数据手册DataSheet

语言	下载文件	备注
英文	MAX5021-MAX5022.pdf	Rev 1; 12/2001

关键参数

Part Number	Application (V_IN)	V_IN (V)	V_IN (V)	Topology	Feedback	Freq. (kHz)	Duty Cycle (%)	I_STARTUP (mA)	I_CC (mA)	Gate Drive Current (A)	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Application (V_IN)	min	max	Topology	Feedback	Freq. (kHz)	max	max	max	max	Oper. Temp. (°C)	Package/Pins	See Notes
MAX5021	Networking (48V) Power Over Ethernet (32-58V) Telecom (36-72V) Universal Off-line (90-240VAC)	24	1000	Single-Ended Forward	Opto	262	50	0.085	2.43	0.25	-40 to +85	µMAX/8 PDIP(N)/8 SOT/6	$0.48 @1k
MAX5022		24	1000	Flyback	Opto	262	75	0.085	2.43	0.25	-40 to +85	µMAX/8 PDIP(N)/8 SOT/6	$0.69 @1k

开发工具

MAX5022EVKIT

技术资料

How to Minimize Power Dissipation in Li+ Linear Chargers

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX5021EPA	停止供货		PDIP(N),；8引脚；81.9mm²	-40°C至+85°C	RoHS/无铅：否
MAX5021EUA	停止供货	MAX5021EUA+	µMAX,；8引脚；15.6mm²	-40°C至+85°C	RoHS/无铅：否
MAX5021EUA+	生产中		µMAX,；8引脚；15.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX5021EUA+T	停止供货		uMAX；8引脚	-40°C至+85°C	参考数据资料
MAX5021EUA-T	停止供货		uMAX；8引脚	-40°C至+85°C	参考数据资料
MAX5021EUT+	生产中		SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX5021EUT+T	生产中		SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX5021EUT-T	停止供货	MAX5021EUT+T	SOT,；6引脚；9mm²	-40°C至+85°C	RoHS/无铅：否
MAX5021EVKIT	停止供货		EVKIT；	-40°C至+85°C	参考数据资料