UC3846

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温度范围为 0°C 至 70°C 的双端 500KHz 电流模式 PWM 控制器

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数据表

document-pdfAcrobat UCx846/7 Current Mode PWM Controller 数据表 (Rev. C) (英语) PDF | HTML

UC3846

正在供货

数据表

立即订购

产品详情

Vin (max) (V)

40

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Flyback, Forward, Half bridge, Push pull

Rating

Catalog

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin

Duty cycle (max) (%)

50

Vin (max) (V)

40

Operating temperature range (°C)

0 to 70

Control mode

Current

Topology

Boost, Flyback, Forward, Half bridge, Push pull

Rating

Catalog

Features

Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin

Duty cycle (max) (%)

50

PDIP (N)

16

181.42 mm² 19.3 x 9.4

SOIC (DW)

16

106.09 mm² 10.3 x 10.3

Automatic Feedforward Compensation
Programmable Pulse-by-Pulse Current Limiting
Automatic Symmetry Correction in Push-Pull
Configuration
Enhanced Load Response Characteristics
Parallel Operation Capability for Modular Power
Systems
Differential Current Sense Amplifier with Wide
Common Mode Range
Double-Pulse Suppression
500-mA (Peak) Totem-pole Outputs
±1% Band Gap Reference
Undervoltage Lockout
Soft-Start Capability
Shutdown Terminal
500-kHz Operation

Automatic Feedforward Compensation
Programmable Pulse-by-Pulse Current Limiting
Automatic Symmetry Correction in Push-Pull
Configuration
Enhanced Load Response Characteristics
Parallel Operation Capability for Modular Power
Systems
Differential Current Sense Amplifier with Wide
Common Mode Range
Double-Pulse Suppression
500-mA (Peak) Totem-pole Outputs
±1% Band Gap Reference
Undervoltage Lockout
Soft-Start Capability
Shutdown Terminal
500-kHz Operation

The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.

The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.

The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

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	类型	标题		下载最新的英语版本	日期
*	数据表	UCx846/7 Current Mode PWM Controller 数据表 (Rev. C)	PDF \| HTML		2016年 1月 4日
	选择指南	电源管理指南 2018 (Rev. K)			2018年 7月 31日
	选择指南	电源管理指南 2018 (Rev. R)			2018年 6月 25日
	技术文章	When should you use PWM controllers?	PDF \| HTML		2016年 12月 2日
	技术文章	Before digital control, there were general-purpose PWMs	PDF \| HTML		2016年 10月 19日
	应用手册	DN-62 开关电源拓扑电压模式与电流模式		英语版	2010年 7月 28日
	应用手册	U-100A UC3842/3/4/5 提供低成本电流模式控制		英语版	2010年 7月 28日
	应用手册	DN-45 UC3846, UC3856 and UCC3806 Push Pull PWM Current Mode Control ICs			1999年 9月 5日
	应用手册	Modeling, Analysis and Compensation of the Current-Mode Converter			1999年 9月 5日
	应用手册	U-93 A New Integrated Circuit for Current Mode Control			1999年 9月 5日