NCP4682DMU15TCG

NCP4682DMU15TCG is one of the latest voltage regulator Linear chips from ON semiconductor, designed for industrial and automotive applications. It is a high-performance linear Voltage Regulator, that combines a dual P-channel MOSFET LP power stage, with the PWM controller, voltage reference and protection circuits. Offered with a wide input voltage range of 5V to 24V, the low quiescent current and high switching frequency operation preserves battery life in mobile applications. The various features of the chip also make it suitable for industrial, automotive and communication applications.

Features and Benefits:

• Wide input voltage range up to 24V
• Quiescent current of only 15µA maximum
• Low power loss and high efficiency
• High switching frequency operation of63 to 76kHz
• Output voltage accuracy of ±1.4%
• Integrated max current protection &soft start
• Complete cycle-by-cycle peak current Mode control
• Compact Surface Mount SOT-25 package

Application Field:

As a high-performance PWM regulator, the NCP4682DMU15TCG can be used in a variety of industrial, automotive and communication applications. These include low voltage motors, charger supplies, and auxiliary power supplies.

The high switching frequency of the NCP4682DMU15TCG enables the use of small component values, that in turn enhances the performance, efficiency and cost of the system. The various features provided by the chip make it ideal for use in Lithium-Ion battery chargers, DC-DC converters, power line deglitch applications, as well as wireless and telecom power supplies.

Working Principle:

The NCP4682DMU15TCG is based on an advanced PWM cycle-by-cycle peak current mode controller, that operates with an output voltage accuracy of ±1.4%. It uses an internal voltage reference for controlling the ON-time for P-ch MOSFETs that drive the buck converter. The output voltage error is sensed through a resistive divider across the output voltage and is corrected by the suitable ON-times.

The chip also employs a comparator circuit that feature fast responsiveness and provide undervoltage, overvoltage and overcurrent protections.

The soft start time of the NCP4682DMU15TCG can be adjusted by the choose of the external capacitor and resistor connected to the SS pin. An internal ramp generator provides a linear ramp signal which slowly increases the reference signal output. As the output voltage increases, the ramp signal slowly decrease to its nominal voltage, resulting in a gradual increase in the output current.

For optimum performance, the NCP4682DMU15TCG should be used together with the NCP1036 low-side P-channel MOSFETs. This helps to reduce the conduction losses and to achieve higher efficiency and power savings.

Conclusion:

The ON semiconductor NCP4682DMU15TCG is a high-performance PWM linear voltage regulator for industrial, automotive and communication applications. It offers a wide input voltage range up to 24V, along with its low quiescent current and an output voltage accuracy of ±1.4%. It also provides integrated max-current protection and soft start sections to prevent overcurrent fault. It is suitable to be used in Lithium-Ion battery chargers, DC-DC converters, power line deglitch applications, wireless and telecom power supplies.