NJU7660M

Product Overview

• Category: Integrated Circuit
• Use: Voltage Converter/Inverter
• Characteristics: Low power consumption, compact size, high efficiency
• Package: SOP (Small Outline Package)
• Essence: Voltage conversion and inversion
• Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

• Input Voltage Range: -0.2V to +6.0V
• Output Voltage Range: -5.0V to +5.0V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 120µA (typical)

Detailed Pin Configuration

The NJU7660M has a total of 8 pins:

1. VOUT: Output voltage pin
2. VIN: Input voltage pin
3. GND: Ground pin
4. C1-: Negative terminal of the flying capacitor C1
5. C1+: Positive terminal of the flying capacitor C1
6. C2-: Negative terminal of the flying capacitor C2
7. C2+: Positive terminal of the flying capacitor C2
8. OSC: Oscillator frequency setting pin

Functional Features

• Voltage Conversion: The NJU7660M can convert a positive input voltage into a negative output voltage.
• Voltage Inversion: It can also invert a positive input voltage to a negative output voltage.
• Low Power Consumption: The IC operates with low quiescent current, making it suitable for battery-powered devices.
• Compact Size: The SOP package allows for space-efficient integration into various electronic systems.
• High Efficiency: The NJU7660M offers high conversion efficiency, minimizing power loss during voltage conversion.

Advantages and Disadvantages

Advantages: - Low power consumption - Compact size - High efficiency

Disadvantages: - Limited input and output voltage range - Requires external flying capacitors for operation

Working Principles

The NJU7660M utilizes charge pump technology to perform voltage conversion and inversion. It employs two flying capacitors (C1 and C2) to store and transfer charges, which are then used to generate the desired output voltage. The IC's internal oscillator controls the charging and discharging of the capacitors, enabling efficient voltage conversion.

Detailed Application Field Plans

The NJU7660M finds applications in various electronic systems, including:

1. Portable Audio Devices: Provides negative voltage supply for audio amplifiers.
2. LCD Displays: Generates required negative voltages for driving LCD panels.
3. Sensor Interfaces: Converts positive sensor outputs to negative inputs for signal processing.
4. Data Communication Systems: Inverts positive logic signals to negative levels for compatibility with certain protocols.

Detailed and Complete Alternative Models

1. ICL7660: Manufactured by Maxim Integrated, offers similar voltage conversion capabilities.
2. TC1044: Produced by Microchip Technology, provides voltage conversion and inversion functions.
3. MAX660: Another offering from Maxim Integrated, suitable for low-power applications.

These alternative models can be considered based on specific requirements and availability.

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