- 制造厂商：TI
- 产品类别：电源管理
- 技术类目：交流/直流和隔离式直流/直流开关稳压器 - PWM 控制器
- 功能描述：在关断状态下具有高输出、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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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.
- 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
- Topology
- Boost, Flyback, Forward, Half-Bridge, Push-Pull
- Duty cycle (Max) (%)
- 50
- Supply voltage (Max) (V)
- 40
- UVLO thresholds on/off (V)
- 7.7/6.95
- Features
- Error Amplifier, Multi-topology, Soft Start, Synchronization Pin
- Operating temperature range (C)
- 0 to 70
- Rating
- Catalog
- Frequency (Max) (kHz)
- 500
- Gate drive (Typ) (A)
- 0.5
UC3847的完整型号有：UC3847DW，以下是这些产品的关键参数及官网采购报价：
UC3847DW，工作温度：0 to 70，封装：SOIC (DW)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UC3847DW的批量USD价格：3.453（1000+）
UC3847DW，工作温度：0 to 70，封装：SOIC (DW)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UC3847DW的批量USD价格：3.453（1000+）
