ISL6721AV-T

Product Overview

Category: Integrated Circuit (IC)

Use: The ISL6721AV-T is a high-performance pulse width modulation (PWM) controller designed for power supply applications. It provides precise control over the switching frequency and duty cycle of power converters.

Characteristics: - High efficiency - Wide input voltage range - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: The ISL6721AV-T is available in a small outline package (SOP) with 8 pins.

Essence: This IC is essential for regulating the power conversion process in various electronic devices, ensuring stable and efficient power delivery.

Packaging/Quantity: The ISL6721AV-T is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 14V
• Output Voltage Range: 0.8V to VIN
• Switching Frequency: 100kHz to 1MHz
• Operating Temperature Range: -40°C to +85°C
• Maximum Duty Cycle: 90%
• Quiescent Current: 2mA

Pin Configuration

The ISL6721AV-T has the following pin configuration:

1. COMP: Compensation pin for feedback loop stability.
2. FB: Feedback pin for voltage regulation.
3. VCC: Power supply pin for internal circuitry.
4. GND: Ground reference pin.
5. RT/CT: Timing resistor/capacitor connection pin.
6. CT: Timing capacitor connection pin.
7. SS/TR: Soft-start/tracking pin.
8. OUT: Output pin for power conversion.

Functional Features

• Precise PWM control for accurate voltage regulation.
• Adaptive dead-time control for improved efficiency.
• Adjustable soft-start for controlled power-up.
• Overcurrent protection to prevent damage to the power supply.
• Thermal shutdown protection to prevent overheating.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility in power conversion. - Overcurrent and thermal protection enhance system reliability.

Disadvantages: - Limited maximum duty cycle may restrict certain applications. - Requires external timing resistor and capacitor for operation.

Working Principles

The ISL6721AV-T operates by generating a PWM signal based on the feedback received from the output voltage. This signal controls the switching of power transistors, regulating the output voltage according to the desired specifications. The adaptive dead-time control ensures efficient power conversion, while the soft-start feature prevents sudden voltage surges during startup. The overcurrent and thermal protection mechanisms safeguard the power supply from potential damage.

Application Field Plans

The ISL6721AV-T is widely used in various power supply applications, including: - Switching power supplies - DC-DC converters - Voltage regulators - Battery chargers - LED drivers

Alternative Models

• ISL6721BV-T
• ISL6721CV-T
• ISL6721DV-T
• ISL6721EV-T

These alternative models offer similar functionality and can be used as replacements for the ISL6721AV-T in different applications.

In conclusion, the ISL6721AV-T is a highly efficient PWM controller designed for power supply applications. Its precise control, wide input voltage range, and built-in protection features make it an ideal choice for various electronic devices requiring stable and efficient power delivery.

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