原标题：TI TPS84620RUQ 6A电源解决方案

　　TI 公司的TPS84620RUQ是容易使用的 6A DC/DC转换器,并在小型BQFN封装莻集成了功率MOSFET,电感和无源元件,只需要3个外接元件就形成整体电源解决方案.效率高达96%, 输入电压可低至1.7V,输出电压从1.2V到5.5V,可调开关频率(480kHz 到780 kHz),主要用在宽带和通信基础设备以及自动测试和医疗设备.本文介绍了TPS84620RUQ主要特性,功能方框图,多种应用电路图以及TPS84620EVM-692 6-A评估板主要特性,电路图和材料清单(BOM).

　　The TPS84620RUQ is an easy-to-use integrated power solution that combines a 6-A DC/DC converter with power MOSFETs, an inductor, and passives into a low profile, BQFN package. This total power solution allows as few as 3 external components and eliminates the loop compensation and magnetics part selection process.

　　The 9×15×2.8 mm BQFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design with greater than 90% efficiency and excellent power dissipation with a thermal impedance of 13°C/W junction to ambient. The device delivers the full 6-A rated output current at 85°C ambient temperature without airflow.

　　The TPS84620 offers the flexibility and the feature-set of a discrete point-of-load design and is ideal for powering performance DSPs and FPGAs

　　TPS84620RUQ主要特性:

　　Complete Integrated Power Solution Allows

　　Small Footprint, Low-Profile Design

　　Efficiencies Up To 96%

　　Wide-Output Voltage Adjust

　　1.2 V to 5.5 V, with 1% Reference Accuracy

　　Optional Split Power Rail allows

　　input voltage down to 1.7 V

　　Adjustable Switching frequency (480 kHz to 780 kHz)

　　Synchronizes to an External Clock

　　Adjustable Slow-Start

　　Output Voltage Sequencing / Tracking

　　Power Good Output

　　Programmable Undervoltage Lockout (UVLO)

　　Output Overcurrent Protection

　　Over Temperature Protection

　　Pre-bias Output Start-up

　　Operating Temperature Range: –40℃ to 85℃

　　Enhanced Thermal Performance; 13°C/W

　　Meets EN55022 Class B Emissions

　　For Design Help Including SwitcherPro visit http://www.ti.com/tps84620

　　TPS84620RUQ 应用:

　　Broadband and Communications Infrastructure

　　Automated Test and Medical Equipment

　　图1.TPS84620RUQ功能方框图

　　图2.TPS84620RUQ典型应用电路图: PVIN = VIN = 4.5V -14.5V, VOUT = 1.8V

　　图3.TPS84620RUQ典型应用电路图:PVIN = VIN = 4.5V -14.5V, VOUT = 3.3V

　　图4.TPS84620RUQ典型应用电路图:PVIN = 3.3V, VIN = 4.5V- 14.5V, VOUT = 1.2V

　　TPS84620EVM-692 6-A评估板整体电源解决方案

　　The TPS84620EVM-692 provides both inputs but is designed and tested with PVIN connected to VIN. This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS84620 regulator. The TPS84620EVM-692 default output voltage is 3.3 V at a 630-kHz switching frequency. The high-side and low-side MOSFETs are incorporated inside the TPS84620 package along with the gate drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS84620 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The compensation components are internal to the TPS84620, and external resistors and jumpers allow for adjustable output voltage and frequency adjustment. Additionally, the TPS84620 provides adjustable slow start, tracking, and undervoltage lockout inputs. The absolute maximum input voltage is 15 V for the TPS84620EVM-692.

　　The TPS84620EVM-692 is a fully assembled and tested circuit for evaluating the TPS84620 4.5-V to 14.5-V Input, 6-A Synchronous Buck, Integrated Power Solution. The TPS84620EVM-692 incorporates a DC/DC converter with output voltage and frequency that are adjustable using jumpers.

　　TPS84620EVM-692 6-A评估板主要特性:

　　Complete Integrated Power Solution Allows Small Footprint, Low-Profile Design

　　Efficiencies Up To 96%

　　Wide-Output Voltage Adjust (1.2 V to 5.5 V) with 1% Reference Accuracy

　　Optional Split Power Rail allows input voltage down to 1.6 V

　　Adjustable Switching Frequency (480 kHz to 780 kHz)

　　Synchronizes to an External Clock

　　Adjustable Slow-Start

　　Output Voltage Sequencing / Tracking

　　Power Good Output

　　图5.TPS84620EVM-692评估板电路图

　　TPS84620EVM-692 6-A评估板材料清单(BOM):