Texas Instruments LM25145同步降压直流-直流控制器
Texas Instruments LM25145同步降压直流-直流控制器旨在对会发生高压瞬变的高输入电压源或输入电源轨的电压进行调节。 这种设计可最大限度地减少对外部浪涌抑制元件的需求。 高边开关最低导通时间为40ns，便于实现较大的降压比，进而实现从24V额定输入到低电压轨的直接降压转换，从而降低系统复杂性以及解决方案成本。 LM25145可在输入电压突降低至6V期间，继续以接近100%的占空比工作。 借助该特性，该器件适合用于高性能工业控制、机器人、数据通信和射频功率放大器应用。
特性
- Versatile synchronous buck DC-DC controller
- Wide input voltage range of 6V to 42V
- Adjustable output voltage From 0.8V to 40V
- Meets EN55022 / CISPR 22 EMI standards
- Lossless RDS(on) or shunt current sensing
- Switching frequency from 100kHz to 1MHz
- SYNC In and SYNC out capability
- 40ns Minimum on-time for high VIN / VOUT ratio
- 140ns Minimum off-time for low dropout
- 0.8V Reference with ±1% feedback accuracy
- 7.5V Gate drivers for standard VTH MOSFETs
- 14ns Adaptive dead-time control
- 2.3A Source and 3.5A sink capability
- Low-side soft-start for pre-biased start-up
- Adjustable soft-start or optional voltage tracking
- Fast line and load transient response
- Voltage-mode control with line feedforward
- High gain-bandwidth error amplifier
- Precision enable input and open-drain power good indicator for sequencing and control
- Inherent protection features for robust design
- Hiccup mode overcurrent protection
- Input UVLO with hysteresis
- VCC and Gate drive UVLO protection
- Thermal shutdown protection with hysteresis
- VQFN-20 Package with wettable flanks
应用
- Telecom infrastructure
- Factory automation
- Test and measurement
- Industrial motor drives
视频
Featured EVM
Texas Instruments LM5145EVM-HD-20A降压控制器EVM
旨在演示同步降压直流-直流降压控制器LM5145的性能。
发布日期: 2017-08-14
| 更新日期: 2022-04-13