BD46231G-TR

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The PMIC or Power Management Integrated Circuits are used for the supervision and control of various power components in various fields, such as automotive, industrial, medical and consumer electronics. One type of PMIC is the BD46231G-TR series, which is an integrated circuit for automotive voltage monitoring and is specifically designed for high temperatures up to 165° C. It is also particularly useful in high reliability applications. The device has a wide range of input voltage ranges, and is suitable for use in circuit separated high and low power supply systems.

The BD46231G-TR is part of the green power management ICs family and it is designed to be used in systems with a 12V nominal supply, such as those in automotive applications. It is a one-chip solution, which combines a power supervisor, a low current standby-operation comparator and a stand-by switching control. Its main advantage is its small size, which makes it suitable for high density applications, such as in automotive electronics.

The BD46231G-TR can monitor two separate input voltages, Vsrc and VMon, which can be either the same or different. The two outputs, VMon and Vsrc, provide different levels of protection from both under and overvoltage conditions, guaranteeing the correct operation of the system even in extreme conditions. The device also features a voltage selection pin that allows the user to select the operating voltage range of the IC. In addition, the device incorporates test pins, which allow the user to monitor the status of the device at any time.

The BD46231G-TR is mainly used to protect systems from overvoltage conditions, but it is also suitable for protection from undervoltage conditions. The device also includes two independent pre-determined trip points (LVP and HVP) with a hysteresis of 1.2V. The hysteresis value is adjustable so that the device can be used in various applications where overvoltage and undervoltage conditions need to be protected from.

In terms of working principle, the device allows for two levels of protection. The first level of protection is the low voltage protection (LVP) which disables the system when the input voltage falls below the pre-determined trip point. The second level of protection is the high voltage protection (HVP) which disables the system when the input voltage exceeds the pre-determined trip point. The HVP and LVP pins are pulled up by an internal voltage divider to a voltage reference level. The voltage reference level is compared with the sensed voltage at Vsrc. If the sensed voltage is greater than the reference level, the HVP output is activated and the system is disabled. If the voltage is lower than the reference level, the LVP output is activated and the system is disabled as well.

The BD46231G-TR is also equipped with a watchdog timer that can be used to detect and recover from dust or severe temperature conditions. This feature makes it suitable for use in harsh automotive environments. The device includes several protection features, such as the integrated high and low voltage screw-closed protection and its thermal protection. All of these features make the BD46231G-TR suitable for a wide range of applications that require high reliability, including automotive, industrial and medical.

In conclusion, the BD46231G-TR is a versatile and reliable PMIC designed to protect systems from both over and undervoltage conditions in automotive and other high reliability applications. It features a wide range of input voltage ranges, a voltage selection pin, a watchdog timer and an integrated high and low voltage screw-closed protection. All of these features make it suitable for a variety of applications that require high reliability and are subject to extreme temperature and dust conditions.

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