NCP1530DM25R2

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Introduction

The NCP1530DM25R2 is a DC-DC synchronous step-down power converter IC from ON Semiconductor, specially designed to operate in the automotive environment. Its main purpose is to provide a simple, reliable, and cost-effective system solution. This IC easily can be used to design a wide range of constant current and constant voltage applications. NCP1530DM25R2 can operate at various voltage levels, ranging from 3V to 45V. The NCP1530DM25R2 is capable of delivering up to 25A of current and is able to support variety of external components, such as Inductors (L1, L2) and MOSFETs. It also includes several integrated features that enable it to operate in a mode of constant current, constant voltage, and constant power.

Features

The NCP1530DM25R2 is a synchronous step-down DC-DC converter that is optimized for automotive applications. Some of the features of this IC are listed below:

• Input Voltage Range: 3V to 45V
• Output Voltage Range: 0.8V to 4V
• Output Current Limit: 25A
• Configurable operating mode: Constant current, constant voltage, and constant power
• Integrated gate drivers for external low-side and high-side MOSFETs
• Frequency jittering for EMI reduction
• 169mV maximum output voltage accuracy
• Integrated output voltage and current sense voltage comparators
• Integrated output overvoltage protection circuit
• Minimal external components
• AEC-Q100 qualified

Application field

The DC-DC synchronous step-down power converter IC, NCP1530DM25R2, can be used in variety of applications and system solutions. This can be used in automotive applications such as starter, electric power system and ADAS. The main application fields are listed below:

• Automotive applications such as starter, electric power system and ADAS
• Hybrid and electric vehicles, including charger and battery management systems
• Industrial applications such as inverters and motor control

Working Principle

The NCP1530DM25R2 operates with an input voltage range of 3V to 45V, and an output of 0.8V to 4V, supporting currents up to 25A. This IC is a synchronous step-down device and works according to the following working principle:

At the start of the switching operation, the high-side and low-side MOSFETs are off, and the ERM is off. The high-side MOSFET turns on, along with the ERM, and the internal GATE driver signals the high-side and low-side MOSFETs and keeps them turned on. The switching operation in such a buck converter configuration allows for the voltage step-down process. When the switch node voltage reaches the set threshold voltage, the High-side MOSFET turns off, and the sensing voltage of the output voltage is applied across the low-side MOSFET. Whenever the switch node voltage deviates from its set threshold, the high-side and low-side MOSFETs alternate on and off in a discontinuous conduction mode.

The NCP1530DM25R2 also has jittering mechanism, which allows the output pulses to occur at random frequencies within a fixed range. The jittering mechanism not only smoothes the output voltage waveform but also causes the EMI emissions within the desired range. The IC can operate in a mode of constant current, constant voltage, and constant power. It also provides protection from over-voltage, under-voltage, and over-temperature conditions.

Conclusion

In conclusion, the NCP1530DM25R2 is a synchronous step-down DC-DC converter IC from ON Semiconductor. It can support various automotive applications and industrial solutions. It is capable of operating between 3 V and 45 V, and delivering up to 25A of current. It provides various features such as jittering mechanism, integrated gate drivers, and overvoltage protection circuit. In addition, It also includes several integrated features that enable it to operate in a mode of constant current, constant voltage, and constant power.

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