TPS40190 - 低引脚数同步降压 DC/DC 控制器

TPS40190是TI德州仪器公司的一款控制器（外部开关）产品，TPS40190是低引脚数同步降压 DC/DC 控制器，本站介绍了TPS40190的封装应用图解、特点和优点、功能等，并给出了与TPS40190相关的TI元器件型号供参考。

TPS40190 - 低引脚数同步降压 DC/DC 控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS40190 is a cost-optimized synchronous buck controller that operates from 4.5 V to 15 V nominally, and implements a fixed frequency voltage mode power supply. The controller uses an adaptive anti-cross conduction scheme to prevent both the high-side and the rectifier MOSFET to be turned on at the same time, preventing shoot through current in the two MOSFETs.

The controller also provides a short circuit protection threshold that is user selectable between one of three values. The protection level is set with a single external resistor connected from COMP to GND. During start-up, the impedance connected to COMP is sensed, and the information is decoded to select one of the three thresholds. When the controller senses an output short circuit, both MOSFETs are turned off and a timeout period is observed before attempting to restart. This provides limited power dissipation in the event of a sustained fault.

The TPS40190 provides strong drivers to minimize switching losses in the power stage, reducing heat build up in the MOSFETs and allowing larger MOSFETs to be used without undue switching time penalty.

产品特性

Input Operating Voltage Range: 4.5 V to 15 V
Reference 0.591 V ±1%
Voltage Mode Control
Internal 5-V Regulator For Internal Housekeeping, Driver Power and Light External Loads
Selectable Short-Circuit Protection Thresholds
Pre-Bias Ouput Safe
Fixed Switching Frequency of 300 kHz
Internal Soft-Start
Small 3 mm × 3 mm, 10-Pin SON Package
Bootstrapped Drivers for N-Channel MOSFET
Adaptive Anti-Cross Conduction
Internal Bootstrap Diode
1.2-A Drivers for Decreased Switching Loss

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