BD45435G-TR

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PMIC stands for Power Management Integrated Circuit and Supervisors refer to a type of PMIC overall responsible for managing the power system, providing safety and protection, and supervising the startup and operation of devices. BD45435G-TR is a PMIC - Supervisors from ROHM Semiconductor that provides electronic functions and features for power control, operational system supervision, and power device management. This application note will discuss the application field and working principle of the BD45435G-TR.

The BD45435G-TR can be used in switching power supplies, AC adapters, wireless LAN equipment, automotive chargers, industrial power supplies, battery power management systems and other applications that require power control and supervision. As a PMIC - Supervisors, the BD45435G-TR is capable of precisely controlling the voltage, current and frequency of the power supply. It also provides protection against short circuits and overvoltage protection as well as supervision of the power supply\'s operational state.

The BD45435G-TR incorporates an advanced microcontroller unit (MCU) and flash memory, which provides the flexibility to customize the output voltage, current, and frequency to meet the needs of different applications. The MCU operates at up to 30MHz and includes an 8-bit CPU core, on-chip ROM, RAM, peripheral registers, PWM timer, watchdog timer, and multiple GPIOs. The flash memory can store programming codes for customizing the output voltage, current and frequency of the power supply.

The BD45435G-TR also includes an overvoltage protection (OVP) and SY-UVLO (Shutdown Under Voltage Lock Out) feature. OVP helps to prevent over-voltage conditions, while SY-UVLO monitors the input voltage level and shuts down the supplies if the input voltage falls below a predetermined level. This helps to protect the system against sudden power loss and transient voltage surges.

The BD45435G-TR also contains a Reverse Overcurrent Protection (RCP) circuit, which prevents reverse current flow when power is cut off. This is useful in high reliability systems, such as in medical applications or automotive products. It also features a Thermal Shutdown (TSD) circuit, which monitors the temperature of the device and shuts down the power supply if the temperature reaches a dangerous level.

The BD45435G-TR can be used with a variety of power supply topologies, such as the flyback, forward and bridge configurations. The MCU and flash memory can be programmed to control the timing of each topology to provide the most efficient power supply performance, thus reducing system cost and power consumption.

In conclusion, the BD45435G-TR is an excellent choice for applications requiring precise current control, system supervision, power device management and an overvoltage protection. The device\'s on-chip MCU and Flash Memory provide the flexibility to customize the output voltage, current and frequency of the power supply. The integrated RCP, OVP, SY-UVLO, and TSD circuits provide enhanced safety and protection against overvoltage, short circuits, and thermal limits.

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