TPS54620RGYR
4.5V至17V输入、6A同步降压SWIFTTM转换器
- 描述
- TPS54620是一款17V、6A同步降压转换器,集成高侧和低侧MOSFET,具有高效率和小型化设计。支持宽输入电压范围(4.5V至17V),开关频率可调(200kHz至1.6MHz),并提供多种保护功能。
- 品牌名称
- TI(德州仪器)
- 商品型号
- TPS54620RGYR
- 商品编号
- C29438
- 商品封装
- VQFN-14-EP(3.5x3.5)
- 包装方式
- 编带
- 商品毛重
- 0.159克(g)
商品参数
| 属性 | 参数值 | |
|---|---|---|
| 商品目录 | DC-DC电源芯片 | |
| 功能类型 | 降压型 | |
| 工作电压 | 4.5V~17V | |
| 输出电压 | 800mV~15V | |
| 输出电流 | 6A | |
| 开关频率 | 1.6MHz | |
| 工作温度 | -40℃~+150℃@(TJ) |
| 属性 | 参数值 | |
|---|---|---|
| 同步整流 | 是 | |
| 输出通道数 | 1 | |
| 拓扑结构 | 降压式 | |
| 静态电流(Iq) | 600uA | |
| 开关管(内置/外置) | 内置 | |
| 输出类型 | 可调 |
商品概述
TPS54620 采用散热增强型 3.50mm×3.50mm 四方扁平无引线(QFN) 封装,是一款功能齐全的 17V、6A 同步降压转换器,该器件具有高效率并且集成高侧和低侧 MOSFET,针对小型设计进行了优化。通过电流模式控制减少组件数量,并通过选择高开关频率缩小电感器封装尺寸来进一步节省空间。 输出电压启动斜坡由 SS/TR 引脚控制,可实现独立电源运行,或者跟踪状态下的运行。此外,正确配置启用与开漏电源正常引脚也可实现电源排序。 高侧 FET 的逐周期电流限制可在过载情况下保护器件,并通过低侧电源限流防止电流失控,从而实现功能增强。此外,还提供可关闭低侧 MOSFET 的低侧吸收电流限值,以防止过多的反向电流。当芯片温度超过热关断温度时,热关断禁用此部件。
The device is a 17-V, 6-A, synchronous step-down (buck) converter with two integrated n-channel MOSFETs. To improve performance during line and load transients the device implements a constant frequency, peak current mode control which also simplifies external frequency compensation. The wide switching frequency of 200 kHz to 1600 kHz allows for efficiency and size optimization when selecting the output filter components. The switching frequency is adjusted using a resistor to ground on the RT/CLK pin. The device also has an internal phase lock loop (PLL) controlled by the RT/CLK pin that can be used to synchronize the switching cycle to the falling edge of an external system clock. The device has been designed for safe monotonic startup into pre-biased loads. The default start up is when VIN is typically 4.0V. The EN pin has an internal pull-up current source that can be used to adjust the input voltage under voltage lockout (UVLO) with two external resistors. In addition, the EN pin can be floating for the device to operate with the internal pull-up current. The total operating current for the device is approximately 600μA when not switching and under no load. When the device is disabled, the supply current is typically less than 2μA. The integrated MOSFETs allow for high efficiency power supply designs with continuous output currents up to 6 amperes. The MOSFETs have been sized to optimize efficiency for lower duty cycle applications.
商品特性
- 集成了 26mΩ/19mΩ MOSFET
- 分离电源轨:PVIN 上电压为 1.6V 至 17V
- 开关频率 200kHz 至 1.6MHz
- 同步至外部时钟
- 温度范围内的电压基准为 0.8V±1%
- 关断时低静态电流为 2μA
- 单启动至预偏置输出
- -40°C 至 150°C 的工作结温范围
- 可调缓启动/电源排序
- 针对欠压及过压的电源正常输出监控
- 可调节输入欠电压锁定
- 由 SwitcherPro™ 软件工具提供支持
应用领域
- 高密度分布式电源系统
- 高性能负载点稳压
- 宽带、网络互联及光纤通信基础设施
