Features:	Auto Retry, OVP, Thermal Limit
Feature Pins:	EN
Supplier Device Package:	10-VSON (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Current - Supply:	470µA
Operating Temperature:	-40°C ~ 85°C
Current - Output (Max):	5A
Voltage - Supply:	4.5 V ~ 5.5 V
Programmable Features:	Current Limit, Slew Rate, UVLO
Series:	--
Applications:	General Purpose
Internal Switch(s):	Yes
Number of Channels:	1
Type:	Hot Swap Controller
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TPS259231DRCR application field and working principle

Introduction

The Texas Instruments TPS259231DRCR is a high efficiency, low power, hot swap controller designed to provide fast and safe overcurrent protection for non-power good configurations. The device combines an analog positive voltage monitoring circuit with an integrated driver, providing fast and safe overcurrent protection in non-power good systems. The device integrates a 3-channel low side driver, four time-delay protection channels, a current regulator based on a voltage reference, and a temperature monitor. During system start-up, the TPS259231DRCR accurately powers up the input node and smoothly transitions to a full current limiting state to prevent inrush current. In overcurrent conditions, the device triggers a short circuit protection and can be configured to latch-off or latch-on DC/DC converters, depending on the requirements of the system. All of these features contribute to robust on-time start up of the system and improve system performance and reliability.

Features

The TPS259231DRCR has many features that make it an ideal hot swap controller. It integrates a low side driver with a voltage regulator based on a voltage reference, three mode select inputs and four time-delay protection channels, making it suitable for a wide range of applications. Among these features, the three modes available on the device are the Steady-State Mode, the Soft-Start Mode and the Latch-Off Mode. In the Steady-State mode, the device starts up quickly and accurately, with no overshoot or undershoot. In the Soft-Start Mode, the device gradually increases the amount of current up to the programmed current, again with no overshoot or undershoot. Finally, in the Latch-Off Mode, the device limits current in case of an overcurrent situation and latches it off.The TPS259231DRCR is integrated with TDMA (Time-Delay Multiplier Array) for time-delay protection for under-voltage, over-temperature and over-current. The TDMA offers three different protection sequencers with programmable time delays to ensure a safe power up. The device also offers surge protection to protect it against transient conditions and a pin to monitor the temperature of the system.

Application Field

The TPS259231DRCR is suitable for a wide range of applications, including hot swap power supplies, overcurrent protection, power sequencing and over-temperature protection for remote system loads. It can be used in automotive, industrial and consumer applications.

Working Principle

The working principle of the TPS259231DRCR is simple: it monitors the input voltage and if it is below the programmed voltage, it triggers protection. When the input voltage exceeds the programmed voltage, the TPS259231DRCR ramps up the current to the load, providing a stable and safe voltage and current.The device is also integrated with overcurrent protection. When the current exceeds the programmed limit, the device triggers an overcurrent or short circuit protection, limiting the current to the load. Depending on the programmed mode, the device can either latch off or stay off till the current is within range.Finally, the device is integrated with a TDMA for over-temperature protection, a surge protection and a pin to monitor the temperature of the system. All these features help protect the system from damage due to over-current and over-temperature.

Conclusion

The Texas Instruments TPS259231DRCR is a high efficiency, low power, hot swap controller designed to provide fast and safe overcurrent protection for non-power good configurations. The integrated features of the device make it suitable for a wide range of applications, including hot swap power supplies, overcurrent protection, power sequencing and over-temperature protection for remote system loads. The device accurately monitors the input voltage, ramps up or down the current to the load, provides overcurrent and temperature protection, and monitors the temperature of the system. The device also offers different protection mechanisms depending on the programmed mode. All of these features enable robust on-time start-up of the system improve system performance and reliability.

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