TI TPS54160 60V1.5A降压电源方案

TI公司的TPS54160是集成了200-mΩ的高边MOSFET的60V1.5A降压电源稳压器,采用电流模式进行控制,从而提供了简单的外部补偿和灵活的元件选择. TPS54160的输入电压从3.5V到60V,静态工作电流116uA,关断电流1.3uA,开关频率从300kHz 到2.5MHz,能外部时钟同步,主要用在12V,24V和48V工业和商业低功率系统,以及视频,GPS和娱乐系统等.本文介绍了TPS54160的主要特性,方框图, 带可调UVLO的高频3.3V输出电源电路图, 宽输入电压设计电路图和PCB布局案例,以及TPS54160EVM-230评估模块(EVM)电路图和材料清单(BOM).

The TPS54160 device is a 60V, 1.5A, step down regulator with an integrated high side MOSFET. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load, regulated output supply current to 116A. Using the enable pin, shutdown supply current is reduced to 1.3A.

Under voltage lockout is internally set at 2.5V, but can be increased using the enable pin. The output voltage startup ramp is controlled by the slow start pin that can also be configured for sequencing/tracking. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage.
A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.
The TPS54160 is available in 10 pin thermally enhanced MSOP Power Pad package.

TPS54160主要特性:
3.5V to 60V Input Voltage Range
200-mΩ High-Side MOSFET
High Efficiency at Light Loads with a Pulse Skipping Eco-Mode
116µA Operating Quiescent Current
1.3µA Shutdown Current
300kHz to 2.5MHz Switching Frequency
Synchronizes to External Clock
Adjustable Slow Start/Sequencing
UV and OV Power Good Output
Adjustable UVLO Voltage and Hysteresis
0.8-V Internal Voltage Reference
MSOP10 Package With PowerPAD
Supported by SwitcherPro Software Tool
(http://focus.ti.com/docs/toolsw/folders/print/switcherpro.html)
TPS54160应用:
12-V, 24-V and 48-V Industrial and Commercial Low Power Systems
Aftermarket Auto Accessories: Video, GPS, Entertainment



图1.TPS54160功能方框图



图2.TPS54160简化电路图



图3.带可调UVLO的高频3.3V输出电源电路图



图4. PCB布局案例



图5.TPS54160宽输入电压设计电路图

TPS54160EVM-230评估模块(EVM)
The TPS54160EVM-230 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS54160 DC/DC converter. This converter is a wide input voltage (3.5 - 60V),2.5MHz, non-synchronous, externally compensated, step down converter capable of 1.5A of output current. The TPS54160EVM-230 provides two independent DC/DC converters based on the TPS54160. The converter at the top of the board (top converter) is designed to operate from a nominal 42VDC 25% input voltage source. This input voltage range is typical for input supplies derived from rectified 24VAC sources.
The top converter provides a 5.0V output and up to 1.5A of output current. The top converter highlights a small solution size by using 0402 components with the minimum number of parts needed to provide a fully functional DC/DC converter complete with a programmed enable/disable voltage and soft start features.
The converter at the bottom of the board (bottom converter) is designed to operate from 6.0V to 60V, the maximum recommended input voltage the TPS54160. The bottom converter provides a 3.3V output with up to 1.5A of output current. The bottom converter has additional component footprints that can be used by the designer to implement a variety of TPS54160 solutions.



图6.TPS54160EVM-230评估模块(EVM)电路图
TPS54160EVM-230 Top Converter材料清单(BOM)



TPS54160EVM-230 Bottom Converter材料清单(BOM):