TLC7705IPWR

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Power management integrated circuits, also known as PMICs, are critical components in any electronic system. From basic applications like cellular phones to complex systems like medical implants, PMICs are used to provide efficient and cost-effective power management solutions. Among them, the Texas Instruments TLC7705IPWR is the industry’s highest performance, highly reliable three-terminal adjustable current limiter for use in a wide range of products. The TLC7705IPWR is part of the PMIC - Supervisors family, which provides essential control functions for power converters.

Overview of TLC7705IPWR

The TLC7705IPWR combines the classic current limiter with a configurable watchdog timer, precision voltage and temperature monitors, a soft-start circuit, and an adjustable undervoltage lockout to protect and monitor multiple circuits, while still providing maximum flexibility. To ensure optimal design flexibility, the IC is available in three different packages with adjustable threshold voltage and an output voltage range of 0.7 V to 70 V. It also offers a wide range of protection features, including overpower, overvoltage, reverse current, short-circuited output, and over-temperature protection with integrated control circuits for both current-limit and overvoltage protection.

Features and Benefits of TLC7705IPWR

The primary advantage of the TLC7705IPWR is its ability to protect multiple circuits by providing a maximum power limitation. It provides fast response time, up to 100 µs, to prevent overcurrent when a system or circuit is overloaded or experiences a fault or abnormal condition. This also makes it suitable for various applications, including motor control, power supplies, and automotive applications. Additionally, it offers a configurable watchdog timer, precision temperature and voltage monitors, a soft-start circuit, adjustable undervoltage lockout, and an adjustable current limit. This helps to minimize power dissipation, save power, and reduce overall system cost.

Applications of TLC7705IPWR

The TLC7705IPWR is mainly used in power conversion and control applications. Examples include motor control circuits, DC/DC converters, Uninterrupted Power Supply (UPS) systems, Battery Stabilization System (BSS) circuits, battery chargers, automotive systems, and mobile, aviation, and industrial applications.

Working Principle of TLC7705IPWR

The TLC7705IPWR provides power-protection and monitoring functionality using current limit, overvoltage, reverse current, and over temperature protection. It includes a configurable watchdog timer, temperature and voltage monitors, a soft-start control circuit, and an adjustable undervoltage lockout. The IC uses a linear current limit technology, with a wide adjustable current limit from five milliamps to dozens of amperes allowing multiple circuits to be protected.

When an abnormal condition is detected, the IC detects the increased current by comparing it to the adjustable current limit, and then adjusts the voltage accordingly until it reaches the desired level. Additionally, the TLC7705IPWR can protect the circuit by shutting down the converter if the maximum current limit is exceeded. This helps to protect the system from short circuit and over current conditions.

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