TC7660SEPA

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Converter
• Characteristics: Low-power, voltage doubling/inverting, high efficiency
• Package: SOP-8 (Small Outline Package)
• Essence: Charge Pump Voltage Converter
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 1.5V to 10V
• Output Voltage Range: -1.5V to -10V
• Output Current: Up to 20mA
• Switching Frequency: 10kHz to 50kHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TC7660SEPA IC has a total of 8 pins arranged as follows:

```

---

| | | U1 | |___________|

Pin Configuration:

  1  2  3  4
 ___________
|           |

8| |5 |___________|

  7  6

```

Pin Description: 1. GND: Ground 2. VOUT: Negative Output Voltage 3. VIN: Positive Input Voltage 4. OSC: Oscillator Frequency Control 5. C1-: Negative Terminal of Flying Capacitor 6. C1+: Positive Terminal of Flying Capacitor 7. C2+: Positive Terminal of Output Capacitor 8. C2-: Negative Terminal of Output Capacitor

Functional Features

• Voltage Conversion: The TC7660SEPA is designed to convert a positive input voltage into a negative output voltage using a charge pump technique.
• Low Power Consumption: This IC operates at low power, making it suitable for battery-powered applications.
• High Efficiency: The voltage conversion process is highly efficient, minimizing power losses.
• Wide Input Voltage Range: The IC can accept input voltages ranging from 1.5V to 10V, providing flexibility in various applications.

Advantages and Disadvantages

Advantages: - Compact Size: The SOP-8 package allows for space-saving integration into electronic devices. - Low Power Consumption: Ideal for energy-efficient applications. - High Efficiency: Minimizes power losses during voltage conversion.

Disadvantages: - Limited Output Current: The maximum output current of 20mA may not be sufficient for high-power applications. - Narrow Temperature Range: The operating temperature range of -40°C to +85°C may limit its use in extreme environments.

Working Principles

The TC7660SEPA utilizes a charge pump technique to convert the input voltage into a negative output voltage. It consists of two flying capacitors (C1 and C2) and an oscillator circuit. The oscillator generates a square wave signal that controls the charging and discharging of the capacitors. During each cycle, the capacitors alternate between being charged from the input voltage and discharging to generate the desired negative output voltage.

Detailed Application Field Plans

The TC7660SEPA is commonly used in various applications, including: 1. Portable Electronics: Used to generate a negative voltage supply for LCD displays, backlighting, and audio amplifiers in portable devices such as smartphones and tablets. 2. Industrial Automation: Provides a negative voltage source for powering operational amplifiers, sensors, and control circuits in industrial automation systems. 3. Automotive Electronics: Used in automotive applications to generate a negative voltage supply for LED lighting, motor control, and audio systems. 4. Medical Devices: Provides a negative voltage for medical equipment such as ultrasound machines, patient monitors, and diagnostic devices.

Detailed and Complete Alternative Models

1. ICL7660S: Similar to TC7660SEPA, but available in a DIP-8 package.
2. MAX1044: Voltage converter IC with similar functionality, available in various package options.
3. LT1054: Integrated switched-capacitor voltage converter with adjustable output voltage.

These alternative models offer similar voltage conversion capabilities and can be considered as substitutes for the TC7660SEPA in different applications.

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