Texas Instruments LM5160 同步降压/Fly-Buck™ 转换器
德州仪器 LM5160 同步降压/Fly-Buck™ 是一款 65V、1.5A 同步降压转换器，集成了高侧和低侧 MOSFET。恒定接通时间控制方案无需环路补偿，并支持快速瞬态响应下的高降压比。内部反馈放大器在整个工作温度范围上保持着 ±1% 的输出电压调整率。导通时间与输入时间成反比，得到几乎恒定的转换频率。峰谷电流限制电路可防御过载情况。 欠压闭锁 (EN/UVLO) 电路可独立提供可调输入欠压阈值和滞回。
The on-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The under-voltage lockout (EN/UVLO) circuit provides independently adjustable input under-voltage threshold and hysteresis. The LM5160A shares the same features and pin configuration as the LM5160. An external bias supply can be connected to the VCC pin of the LM5160A in either Buck or Fly-Buck applications. This additional capability can improve efficiency at high input voltages. The Texas Instruments LM5160-Q1 devices are AEC-Q100 qualified for automotive applications.
特性
- Wide 4.5V to 65V Input Voltage Range
- Integrated High and Low Side Switches
- No Schottky Diode Required
- 1.5A Maximum Load Current
- Constant On-Time Control
- No External Loop Compensation
- Fast Transient Response
- Selectable Forced CCM or DCM Operation
- CCM Option Supports Multi-Output Fly-Buck
- Nearly Constant Switching Frequency
- Frequency Adjustable up to 1MHz
- Programmable Soft-Start Time
- Pre-Biased Startup
- Peak Current Limiting Protection
- Adjustable Input UVLO and Hysteresis
- ±1% Feedback Voltage Reference
- Thermal Shutdown Protection
应用
- Industrial Programmable Logic Controller
- IGBT Gate Drive Bias Supply
- Telecom Primary/Secondary Side Bias
- E-meter Power Line Communication
- Low Power Isolated DC-DC (Fly-Buck)
- Automotive Electronics
Datasheets
Block Diagram
Related Development Tools
发布日期: 2014-11-25
| 更新日期: 2022-03-11