BD45245G-TR

PMIC (Power Management Integrated Circuit) Supervisors are common in power management solutions and are designed to provide reliable protection from voltage and temperature excursions. The BD45245G-TR, one such supervisor, provides accurate monitoring and output control of multiple power supply settings such as output voltage, over-temperature, under-voltage, short-circuit, over-voltage, and low battery indications.

This device offers superior performance, with a wide operating temperature range from -40 to +85°C, low quiescent current of 60µA, and high peak output current of 1A. It also has a built-in temperature-sensing circuit with selectable ramp rates, allowing the user to adjust over-temperature settings based on the application requirements.

The BD45245G-TR has a wide variety of application fields, ranging from consumer electronics and telecommunications to industrial and automotive applications. In consumer electronics, it can be used to control the screen backlight luminance and to ensure the safe operation of other peripheral components such as audio amplifiers, USB controllers, and batteries. In telecommunication applications, it can be used to control the system power supply settings, as well as to monitor over-voltage, over-temperature and low battery conditions. In industrial and automotive applications, it can be used for the control of output voltage for safety devices, DC/DC power converters, and battery charging control.

To achieve its functionality, the BD45245G-TR incorporates an array of logic gates, a comparator, and two resistor networks. This combination of devices supports the following operating modes: under-voltage monitoring; over-voltage monitoring; over-temperature detection; low battery detection; short-circuit detection; and output voltage control.

For the under-voltage monitoring mode, the device contains a comparator circuit that compares the input voltage with an internally-set voltage level. If the input voltage is below the set threshold, an output signal is generated and can be used to take corrective action, such as disconnecting the power supply. With the over-voltage monitoring mode, the device also contains a comparator, which compares the input voltage with an internally-set voltage level. If the input voltage is higher than the set threshold, an output signal is generated and can be used to take corrective action, such as disconnecting the power supply.

For the over-temperature detection mode, the device includes a temperature-sensing circuit with selectable ramp rates. This allows the user to set the threshold level for detection of over-temperature condition. If the temperature exceeds the set threshold, an output signal is generated and can be used to take corrective action, such as reducing the power supply setting.

For the low battery detection mode, the device includes a comparator circuit which compares the battery voltage with an internally-set voltage level. If the battery voltage falls below the set threshold, an output signal is generated and can be used to take corrective action, such as connecting the battery to an external charger.

For the short-circuit detection mode, the device contains a comparator circuit which compares the voltage drop across a resistor with an internally-set voltage level. If the voltage drop is greater than the set threshold, an output signal is generated and can be used to take corrective action, such as disconnecting the power supply.

Finally, for the output voltage control mode, the device contains two resistor networks, one for setting the upper voltage limit and one for setting the lower voltage limit. By adjusting the resistors, the user can set the output voltage to their desired level.

In summary, the BD45245G-TR is a versatile power management supervisor with a wide range of application fields, from consumer electronics and telecommunications to industrial and automotive applications. Its superior performance, low quiescent current, and high peak output current make it a great solution for any power supply system. It also provides accurate monitoring and output control of multiple power supply settings and a built-in temperature-sensing circuit with selectable ramp rates, allowing the user to adjust over-temperature settings according to their application requirements.