ICL7660CSA+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Converter

Characteristics: - Converts input voltage to a negative output voltage - Low power consumption - High efficiency - Wide operating voltage range - Compact package size

Package: SOIC (Small Outline Integrated Circuit)

Essence: The ICL7660CSA+ is a voltage converter IC that can generate a negative output voltage from a positive input voltage.

Packaging/Quantity: The ICL7660CSA+ is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 1.5V to 12V
• Output Voltage Range: -1.5V to -12V
• Output Current: Up to 100mA
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage Rejection Ratio: 70dB
• Switching Frequency: 10kHz

Detailed Pin Configuration

The ICL7660CSA+ has 8 pins, which are as follows:

1. GND: Ground reference for the IC.
2. V+ (Pin 1): Positive supply voltage input.
3. OSC (Pin 2): Oscillator frequency control pin.
4. CAP+ (Pin 3): Positive terminal of the external flying capacitor.
5. CAP- (Pin 4): Negative terminal of the external flying capacitor.
6. Vout (Pin 5): Negative output voltage.
7. V- (Pin 6): Negative supply voltage input.
8. SHDN (Pin 7): Shutdown control pin.
9. Vref (Pin 8): Reference voltage output.

Functional Features

• Voltage Conversion: The ICL7660CSA+ converts a positive input voltage to a negative output voltage.
• Oscillator: The internal oscillator generates the switching frequency for the voltage conversion process.
• Shutdown Control: The SHDN pin allows the IC to be put into a low-power shutdown mode when not in use.
• Reference Voltage Output: The Vref pin provides a stable reference voltage for other circuitry.

Advantages and Disadvantages

Advantages: - Low power consumption - High efficiency - Wide operating voltage range - Compact package size - Easy to use and integrate into circuits

Disadvantages: - Limited output current capacity (up to 100mA) - Requires external flying capacitor for operation

Working Principles

The ICL7660CSA+ utilizes charge pumps to convert the input voltage to a negative output voltage. It employs an internal oscillator to control the switching of capacitors, which results in the desired voltage conversion. The IC also includes voltage regulation and protection features to ensure stable and reliable operation.

Detailed Application Field Plans

The ICL7660CSA+ finds applications in various fields, including:

1. Portable Electronics: Used to generate negative supply voltages for LCD displays, audio amplifiers, and other components.
2. Industrial Automation: Provides negative voltage sources for sensors, actuators, and control systems.
3. Automotive Electronics: Used in automotive circuits requiring negative voltage generation, such as lighting systems and motor control.
4. Telecommunications: Enables the creation of negative supply rails for communication devices and network equipment.

Detailed and Complete Alternative Models

1. MAX1044: Similar voltage converter IC with comparable specifications and pin configuration.
2. ICL7660A: An earlier version of the ICL7660CSA+ with slightly different characteristics but compatible pinout.
3. LTC1044: Another alternative voltage converter IC with enhanced features and higher output current capability.

In conclusion, the ICL7660CSA+ is a voltage converter IC that efficiently converts positive input voltages to negative output voltages. With its compact package size and wide operating voltage range, it finds applications in various fields such as portable electronics, industrial automation, automotive electronics, and telecommunications. While it has limitations in terms of output current capacity, it offers advantages such as low power consumption and ease of integration. Alternative models like MAX1044, ICL7660A, and LTC1044 provide additional options with similar functionalities.