TC7660EOA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Converter
• Characteristics: Low-power, voltage doubling/inverting, charge pump
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Converts input voltage to a higher or lower output voltage using a charge pump circuit
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 1.5V to 10V
• Output Voltage Range: -1.5V to -10V (inverting mode), 3V to 20V (doubling mode)
• Output Current: Up to 20mA
• Operating Temperature Range: -40°C to +85°C
• Supply Current: 120µA typical
• Switching Frequency: 12kHz typical

Detailed Pin Configuration

The TC7660EOA has the following pin configuration:

1. GND (Ground)
2. VOUT (Output Voltage)
3. VIN (Input Voltage)
4. OSC (Oscillator)
5. C1- (Negative Terminal of Capacitor 1)
6. C1+ (Positive Terminal of Capacitor 1)
7. C2+ (Positive Terminal of Capacitor 2)
8. C2- (Negative Terminal of Capacitor 2)

Functional Features

• Voltage doubling: Converts a low input voltage to a higher output voltage.
• Voltage inverting: Converts a positive input voltage to a negative output voltage.
• Charge pump operation: Utilizes capacitors to store and transfer charge for voltage conversion.
• Low-power consumption: Operates with a low supply current, making it suitable for battery-powered devices.
• Wide input voltage range: Can accept input voltages ranging from 1.5V to 10V.
• Stable output: Provides a regulated and stable output voltage.

Advantages and Disadvantages

Advantages: - Compact size and easy integration due to the 8-pin SOIC package. - Low-power consumption extends battery life in portable devices. - Wide input voltage range allows for versatile applications. - Reliable and stable output voltage.

Disadvantages: - Limited output current capacity (up to 20mA). - Switching frequency may cause interference in sensitive electronic systems.

Working Principles

The TC7660EOA operates based on the charge pump principle. It uses two capacitors, C1 and C2, to store and transfer charge. The oscillator generates a square wave that controls the switching of the internal switches. During each cycle, the capacitors alternate between charging and discharging, resulting in voltage doubling or inverting.

Detailed Application Field Plans

The TC7660EOA finds applications in various fields, including:

1. Battery-powered devices: Provides voltage conversion for efficient power management in portable electronics.
2. Audio equipment: Used for generating negative supply voltages required by some audio amplifiers and processors.
3. LCD displays: Converts low input voltages to higher levels required for driving LCD panels.
4. Industrial automation: Enables voltage level shifting and inversion in control systems.
5. Automotive electronics: Used for voltage conversion in automotive modules and sensors.

Detailed and Complete Alternative Models

1. ICL7660CPA: Similar voltage converter IC with identical pin configuration and specifications.
2. MAX1044: Voltage converter IC with extended temperature range and higher output current capability.
3. LT1054: Integrated switched-capacitor voltage converter with adjustable output voltage.

(Note: This is not an exhaustive list; there are several alternative models available in the market.)

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