TC7660COA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Converter
• Characteristics: Low-power, voltage-inverting DC-to-DC converter
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Converts a positive input voltage to a corresponding negative output voltage
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 1.5V to 10V
• Output Voltage Range: -1.5V to -10V
• Output Current: Up to 20mA
• Operating Temperature Range: -40°C to +85°C
• Supply Current: 120µA typical
• Switching Frequency: 10kHz typical

Detailed Pin Configuration

The TC7660COA has the following pin configuration:

1. GND: Ground reference for the IC
2. VOUT: Negative output voltage
3. VIN: Positive input voltage
4. OSC: Oscillator frequency control
5. C1-: External capacitor connection for oscillator frequency control
6. C1+: External capacitor connection for oscillator frequency control
7. C2-: External capacitor connection for voltage conversion
8. C2+: External capacitor connection for voltage conversion

Functional Features

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

Advantages and Disadvantages

Advantages

• Simple and compact design
• Low power consumption
• Wide input voltage range allows for versatile applications
• High output current capability enables driving various loads
• Cost-effective solution for voltage inversion

Disadvantages

• Limited output current compared to some alternative models
• Requires external capacitors for operation, increasing component count

Working Principles

The TC7660COA 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 and uses two external capacitors for voltage conversion. The IC converts the input voltage into a square wave, which is then rectified and filtered to produce the desired negative output voltage.

Detailed Application Field Plans

The TC7660COA finds applications in various fields, including:

1. Portable Electronics: Provides a negative voltage source for LCD displays, backlighting, and audio amplifiers.
2. Industrial Automation: Used in control systems, sensors, and actuators that require a negative power supply.
3. Automotive Electronics: Enables the operation of negative voltage-dependent components such as sensors and lighting systems.
4. Telecommunications: Supports negative voltage requirements in communication devices and network equipment.
5. Medical Devices: Provides negative voltage for medical imaging systems, patient monitoring devices, and laboratory equipment.

Detailed and Complete Alternative Models

1. ICL7660SIPA: Similar functionality with improved output current capability (up to 50mA).
2. MAX660CPA: Higher output current capability (up to 100mA) and wider operating temperature range (-40°C to +125°C).
3. LT1054CN8: Offers adjustable output voltage and higher output current capability (up to 200mA).

These alternative models provide similar voltage conversion capabilities with varying specifications to suit different application requirements.

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