UC1856 改进的电流模式 PWM 控制器_BDTIC代理TI 德州仪器UC1856

UC1856 改进的电流模式 PWM 控制器

The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity

	UC1856
Topology	Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Control Method	Current
Duty Cycle (Max) (%)	50
Frequency (Max) (kHz)	1000
UVLO Thresholds On/Off (V)	7.7/7
Pin/Package	16CDIP, 20LCCC
Approx. Price (US$)
Power (Min) (W)
Power (Max) (W)
Vin (Min) (V)	8
Vin (Max) (V)	40
Vout (Min) (V)
Regulated Outputs (#)	2
Operating Temperature Range (C)	-55 to 125
Rating	Military

UC1856 特性

Pin-for-Pin Compatible With the UC3846
65ns Typical Delay From Shutdown to Outputs, and 50ns Typical Delay From Sync to Outputs
Improved Current Sense Amplifier With Reduced Noise Sensitivity
Differential Current Sense with 3V Common Mode Range
Trimmed Oscillator Discharge Current for Accurate Deadband Control
Accurate 1V Shutdown Threshold
High Current Dual Totem Pole Outputs (1.5A peak)
TTL Compatible Oscillator SYNC Pin Thresholds
4kV ESD Protection

UC1856 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
5962-9453001M2A	ACTIVE	-55 to 125	31.60 \| 100u	LCCC (FK) \| 20	1 \| TUBE
5962-9453001MEA	ACTIVE	-55 to 125	22.04 \| 100u	CDIP (J) \| 16	1 \| TUBE
UC1856J	ACTIVE	-55 to 125	18.86 \| 100u	CDIP (J) \| 16	1 \| TUBE
UC1856J883B	ACTIVE	-55 to 125	22.04 \| 100u	CDIP (J) \| 16	1 \| TUBE
UC1856L20	ACTIVE	-55 to 125	23.11 \| 100u	LCCC (FK) \| 20	1 \| TUBE
UC1856L20883B	ACTIVE	-55 to 125	31.60 \| 100u	LCCC (FK) \| 20	1 \| TUBE

UC1856 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
5962-9453001M2A	TBD	Call TI	Call TI	5962-9453001M2A	5962-9453001M2A
5962-9453001MEA	TBD	Call TI	Call TI	5962-9453001MEA	5962-9453001MEA
UC1856J	TBD	A42	N/A for Pkg Type	UC1856J	UC1856J
UC1856J883B	TBD	A42	N/A for Pkg Type	UC1856J883B	UC1856J883B
UC1856L20	TBD	POST-PLATE	N/A for Pkg Type	UC1856L20	UC1856L20
UC1856L20883B	TBD	POST-PLATE	N/A for Pkg Type	UC1856L20883B	UC1856L20883B

UC1856 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