TPS40400是TI公司的一款控制器(外部开关)产品,TPS40400是3V to 20V PMBus SYNCHRONOUS BUCK CONTROLLER,本页介绍了TPS40400的产品说明、应用、特性等,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 - TI公司(Texas Instruments,德州仪器)
- 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
- Smart Power Systems
- Power Supply Modules
- Communications Equipment
- Computing Equipment
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.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS40400 | VQFN (24) | 3.50 mm × 3.50 mm |