L4981BD013TR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High efficiency, low standby power consumption
• Package: DFN-8 (Dual Flat No-Lead)
• Essence: Switching Regulator Controller
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 8V to 55V
• Output Voltage Range: 3.3V to 60V
• Maximum Output Current: 2A
• Switching Frequency: 100kHz to 500kHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L4981BD013TR IC has the following pin configuration:

1. COMP: Compensation pin for loop stability.
2. CS: Current sense input pin for current sensing.
3. FB: Feedback pin for voltage regulation.
4. GND: Ground reference pin.
5. VCC: Supply voltage input pin.
6. RT/CT: Timing components connection pins.
7. SD: Shutdown pin for enabling/disabling the device.
8. OUT: Output pin for connecting the external power switch.

Functional Features

• High efficiency due to low RDS(on) internal power MOSFETs.
• Low standby power consumption in burst mode operation.
• Adjustable output voltage through external resistors.
• Overvoltage protection and thermal shutdown features.
• Soft-start function for controlled startup.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power dissipation. - Low standby power consumption saves energy. - Wide input and output voltage range for versatile applications. - Compact package size allows for space-saving designs.

Disadvantages: - Limited maximum output current of 2A. - Requires external components for complete functionality. - Higher cost compared to non-integrated solutions.

Working Principles

The L4981BD013TR is a switching regulator controller that operates in continuous conduction mode (CCM). It uses a voltage-mode control technique to regulate the output voltage. The IC generates a PWM signal based on the feedback voltage and compares it with the current sense signal to adjust the duty cycle of the power switch. This regulates the output voltage according to the desired setpoint. The device also incorporates protection features such as overvoltage protection and thermal shutdown to ensure safe operation.

Detailed Application Field Plans

The L4981BD013TR is commonly used in various power management applications, including:

1. Power Supplies: It can be used in offline flyback or forward converters to provide regulated DC voltages for various electronic devices.
2. LED Lighting: The IC's high efficiency and adjustable output voltage make it suitable for driving LED lighting systems.
3. Industrial Automation: It can be employed in industrial control systems, motor drives, and robotics for efficient power conversion.
4. Automotive Electronics: The device finds applications in automotive power supplies, battery chargers, and electric vehicle charging stations.

Detailed and Complete Alternative Models

Some alternative models to the L4981BD013TR include:

1. L4981A: Similar functionality but with different pin configuration.
2. L4981B: Improved version with additional protection features.
3. L4981C: Higher maximum output current capability.
4. L4981D: Enhanced performance with wider input voltage range.

These alternative models offer similar functionality and can be chosen based on specific application requirements.

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