NCP1400ASN30T1

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The NCP1400ASN30T1 is a DC-DC Switching Regulator integrated circuit (IC)designed for Power management and Voltage Regulation.

This device features a ULtrasonic-Controlled PFM (UC-PFM) control architecture, allowing it to offer excellent efficiency, output power and performance over a wide range of load conditions. It has the added benefit of being able to operate in constant-on-time mode over near-zero load currents, providing an extremely low-ripple current for high-load applications.

The NCP1400ASN30T1 is available in a small 5mm x 6mm MLPQ-16 package and is ideal for high-voltage input, low-voltage output, low-noise applications in industrial and consumer fields.

Application Fields

The NCP1400ASN30T1 can be used for a variety of applications including:

• Step-down dc-dc converters
• Battery-powered devices
• Automotive applications
• Network/communication systems
• LED lightings
• 10 W-150W power supplies
• Lighting and energy-saving equipment
• Industrial control systems.

Features

The NCP1400ASN30T1 includes many of the following features:

• Input voltage range: 6V-100V
• Output voltage range: 0.8V-38V
• Operating frequency: 300KHz-1.2MHz
• Output power: 10W-150W
• ULtrasonic-controlled PFM (UC-PFM) control architecture
• 3.3V internal reference
• Allowable input and output voltage differences as wide as 138V
• Low-ripple current for high-load applications
• Zero-voltage switching (ZVS)
• High peak current (up to 3A)

Working Principle

The NCP1400ASN30T1 is based on the UC-PFM control architecture and has the following operating principles:

1. The input voltage is diode-clamped and then stepped down by an internal high-frequency switching Buck circuit.
2. The UC-PFM control architecture dynamically adjusts the operating frequency and duty cycle of the switching Buck circuit to maintain constant output voltage with minimal current ripple.
3. The duty cycle is adjusted by varying the operating frequency within the range of 300KHz to 1.2MHz.
4. A current-mode control is used to regulate the output voltage by sensing the output current.
5. The device includes internal protection features such as short-circuit protection and over-temperature protection.

Advantages

The NCP1400ASN30T1 offers several advantages over other voltage regulation integrated circuits such as:

• High efficiency and output power ratings
• Low noise operation over a wide range of loads
• Compact size
• Wide input and output voltage range
• Protective features
• Cost effective

Conclusion

The NCP1400ASN30T1 is a low-cost,high-efficiency DC-DC Switching Regulator IC designed for versatile Power Management and Voltage Regulation applications. The device is available in a small 5mm x 6mm MLPQ-16 package making it ideal for consumer and industrial applications such as battery-powered devices, automotive applications, LED lighting, 10 W-150W power supplies, andlighting and energy-saving devices. Its UC-PFM control architectureallows it to achieve high efficiency, output power and low-noise operation over a wide range of load conditions.

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