UC1846 电流模式 PWM 控制器_BDTIC代理TI 德州仪器UC1846

UC1846 电流模式 PWM 控制器

The UC1846/7 family of control ICs 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 "power modules" while maintaining equal current sharing.

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

	UC1846
Topology	Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Control Method	Current
Duty Cycle (Max) (%)	50
Frequency (Max) (kHz)	450
UVLO Thresholds On/Off (V)	7.7/6.95
Pin/Package	16CDIP, 20LCCC
Approx. Price (US$)	7.23 \| 100u
Vin (Min) (V)	7
Vin (Max) (V)	40
Regulated Outputs (#)	2
Operating Temperature Range (C)	-55 to 125
Rating	Military

UC1846 特性

Automatic Feed Forward 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
500mA (Peak) Totem-pole Outputs
±1% Bandgap Reference
Under-voltage Lockout
Soft Start Capability
Shutdown Terminal
500kHZ Operation

UC1846 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 \| 引脚	封装数量 \| 封装载体	丝印标记
5962-86806012A	ACTIVE	-55 to 125	25.44 \| 100u	LCCC (FK) \| 20	1 \| TUBE
5962-8680601EA	ACTIVE	-55 to 125	12.05 \| 100u	CDIP (J) \| 16	1 \| TUBE
UC1846J	ACTIVE	-55 to 125	7.23 \| 100u	CDIP (J) \| 16	1 \| TUBE
UC1846J883B	ACTIVE	-55 to 125	12.05 \| 100u	CDIP (J) \| 16	1 \| TUBE
UC1846L883B	ACTIVE	-55 to 125	25.44 \| 100u	LCCC (FK) \| 20	1 \| TUBE

UC1846 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
5962-86806012A	TBD	Call TI	Call TI	5962-86806012A	5962-86806012A
5962-8680601EA	TBD	Call TI	Call TI	5962-8680601EA	5962-8680601EA
UC1846J	TBD	A42	N/A for Pkg Type	UC1846J	UC1846J
UC1846J883B	TBD	A42	N/A for Pkg Type	UC1846J883B	UC1846J883B
UC1846L883B	TBD	POST-PLATE	N/A for Pkg Type	UC1846L883B	UC1846L883B

UC1846 工具与软件

培训内容	型号	软件/工具类型
最常用开关模式电源的功率级设计器	POWERSTAGE-DESIGNER	分析软件