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TPS40400 - 产品图解：
TPS40400-控制器（外部开关）-DC/DC开关稳压器-电源管理
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TI产品 - TPS40400介绍

TPS40400 - 3V to 20V PMBus SYNCHRONOUS BUCK CONTROLLER

TPS40400是TI德州仪器公司的一款控制器（外部开关）产品，TPS40400是3V to 20V PMBus SYNCHRONOUS BUCK CONTROLLER，本站介绍了TPS40400的封装应用图解、特点和优点、功能等，并给出了与TPS40400相关的TI元器件型号供参考。

TPS40400 - 3V to 20V PMBus SYNCHRONOUS BUCK CONTROLLER - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品特性
  • Input Operating Voltage Range: 3 V to 20 V
  • PMBus Enabled Analog Controller
  • Reference 600 mV ± 1%
  • Remote Voltage Sense Amplifier
  • Internal 6-V Regulator and 6-V Gate Drive
  • Programmable Overcurrent Protection
  • Inductor Resistance or Series Resistance Used for Current Sensing
  • Programmable Switching Frequency: 200 kHz to 2 MHz
  • Powergood Indicator
  • Thermal Shutdown
  • Programmable Soft-Start
  • Internal Bootstrap Diode
  • Prebias Output Safe
  • 24-Pin QFN Package
产品应用
  • Smart Power Systems
  • Power Supply Modules
  • Communications Equipment
  • Computing Equipment
产品说明

The TPS40400 is a cost-optimized flexible synchronous buck controller that operates from a nominal 3-V to 20-V supply. This controller is an analog PWM controller that allows programming and monitoring through the PMBus™ interface. Flexible features found on this device include programmable soft-start time, programmable short circuit limit, and programmable undervoltage lockout (UVLO).

An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Gate drive voltage is 6 V to better enhance the power FETs for reduced losses. Short circuit detection occurs by sensing the voltage drop across the inductor or across a resistor placed in series with the inductor. A PMBus programmable threshold is compared to this voltage and is used to detect overcurrent. When the overcurrent threshold is reached, a pulse by pulse current limit scheme is used to limit the current to acceptable levels. If the overcurrent condition persists for more than 7 clock cycles of the converter, a fault condition is declared and the converter shuts down and goes into either a hiccup restart mode or latches off. The behavior can be selected through the PMBus interface. Other PMBus interface features include programmable operating frequency, soft-start time, overvoltage and undervoltage thresholds and the response to those events, output voltage change including margining as well as status monitoring.

产品器件信息
PART NUMBERPACKAGEBODY SIZE (NOM)
TPS40400VQFN (24)3.50 mm × 3.50 mm
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