TC7660CPA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Converter
• Characteristics: Low-power, voltage-inverting DC-to-DC converter
• Package: 8-pin PDIP (Plastic Dual In-line Package)
• Essence: Converts a positive input voltage to a corresponding negative output voltage
• Packaging/Quantity: Available in tubes or reels, quantity varies based on supplier

Specifications

• Input Voltage Range: 1.5V to 12V
• Output Voltage Range: -1.5V to -12V
• Output Current: Up to 20mA
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage: 1.5V to 12V
• Quiescent Current: 120µA (typical)

Detailed Pin Configuration

The TC7660CPA has eight pins arranged as follows:

```

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| | --| VOUT |-- --| GND |-- --| VIN+ |-- --| VIN- |-- --| OSC |-- --| C1 |-- --| C2 |-- |_______| ```

1. VOUT: Negative Output Voltage
2. GND: Ground
3. VIN+: Positive Input Voltage
4. VIN-: Negative Input Voltage
5. OSC: Oscillator Frequency Control
6. C1: External Capacitor Connection
7. C2: External Capacitor Connection

Functional Features

• Converts a positive input voltage to a corresponding negative output voltage
• Low-power consumption
• Wide input voltage range
• High output current capability
• Built-in oscillator for frequency control
• Requires only two external capacitors for operation

Advantages and Disadvantages

Advantages: - Efficient voltage conversion - Compact package size - Wide operating temperature range - Low quiescent current

Disadvantages: - Limited output current capacity - Requires external capacitors for operation

Working Principles

The TC7660CPA is a voltage converter that utilizes charge pumps to generate a negative output voltage from a positive input voltage. It employs an internal oscillator to control the switching frequency, which drives the charge pump circuitry. The input voltage is first inverted and then multiplied by the charge pump to produce the desired negative output voltage.

Detailed Application Field Plans

The TC7660CPA finds applications in various fields, including:

1. Battery-Powered Devices: Used to generate a negative voltage supply for LCD displays, sensors, or other components.
2. Audio Equipment: Provides a negative bias voltage for audio amplifiers or preamplifiers.
3. Industrial Control Systems: Used in control circuits requiring a negative voltage reference.
4. Automotive Electronics: Provides a negative voltage source for automotive sensors or actuators.
5. Telecommunications: Used in telecommunication equipment for generating negative voltages required by certain components.

Detailed and Complete Alternative Models

1. ICL7660CPA: Similar functionality, pin configuration, and specifications.
2. MAX660CPA: Voltage converter with improved output current capability.
3. LT1054CP: Higher efficiency voltage converter with adjustable output voltage.

These alternative models offer similar features and can be used as substitutes for the TC7660CPA based on specific requirements.

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