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 NUMBER	PACKAGE	BODY SIZE (NOM)
TPS40400	VQFN (24)	3.50 mm × 3.50 mm

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