UC1843-HIREL 电流模式 PWM 控制器_BDTIC代理TI 德州仪器UC1843-HIREL

UC1843-HIREL 电流模式 PWM 控制器

The UC1843 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%.

	UC1843-HIREL
Topology	Boost, Flyback,Forward
Control Method	Current
Duty Cycle (Max) (%)	100
Frequency (Max) (kHz)	450
UVLO Thresholds On/Off (V)	8.4/7.6
Regulated Outputs (#)	1
Operating Temperature Range (C)	-55 to 125
Rating	Military

UC1843-HIREL 特性

–55°C to 125°C Known Good Die
Controlled Baseline
Optimized For Off-line and DC-to-DC Converters
Low Start-Up Current (<1 mA)
Automatic Feed Forward Compensation
Pulse-by-Pulse Current Limiting
Enhanced Load Response Characteristics
Under-Voltage Lockout With Hysteresis
Double Pulse Suppression
High Current Totem Pole Output
Internally Trimmed Bandgap Reference
500-kHz Operation
Low RO Error Amp

UC1843-HIREL 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
UC1843MKGD1	ACTIVE	-55 to 125	8.11 \| 100u	XCEPT (KGD) \| 0	100

UC1843-HIREL 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
UC1843MKGD1	TBD	Call TI	N/A for Pkg Type	UC1843MKGD1	UC1843MKGD1

UC1843-HIREL 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