UC3823BDW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance PWM Controller
• Package: SOIC-16
• Essence: Regulates and controls power delivery in various applications
• Packaging/Quantity: Available in tape and reel packaging, with 250 units per reel

Specifications

• Input Voltage: 10V to 20V
• Output Voltage: Adjustable from 0.8V to 18V
• Operating Temperature: -40°C to +85°C
• Switching Frequency: 100kHz to 1MHz
• Maximum Duty Cycle: 50%
• Output Current: Up to 1A

Detailed Pin Configuration

The UC3823BDW has a total of 16 pins, which are assigned as follows:

1. VREF: Reference voltage input
2. COMP: Error amplifier output
3. FB: Feedback pin for output voltage regulation
4. RT/CT: Timing components connection
5. CT: Timing capacitor connection
6. RT: Timing resistor connection
7. GND: Ground reference
8. OSC: Oscillator timing capacitor connection
9. SYNC: Synchronization input
10. SS/TR: Soft-start and shutdown control
11. VCC: Supply voltage input
12. OUT: Output voltage
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• High-performance pulse-width modulation (PWM) controller
• Provides precise control over power delivery
• Supports adjustable output voltage
• Incorporates error amplifier for accurate feedback control
• Offers synchronization capability for multi-phase operation
• Includes soft-start and shutdown control for smooth operation

Advantages and Disadvantages

Advantages

• High-performance and reliable power management solution
• Flexible output voltage adjustment
• Accurate feedback control for stable operation
• Synchronization capability for multi-phase applications
• Soft-start feature ensures smooth power-up

Disadvantages

• Limited maximum duty cycle of 50%
• Output current limited to 1A

Working Principles

The UC3823BDW is a high-performance PWM controller that regulates power delivery in various applications. It operates by comparing the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified by the internal error amplifier (COMP) and used to control the duty cycle of the output waveform.

By adjusting the timing components (RT/CT), the switching frequency and duty cycle can be set according to the desired application requirements. The UC3823BDW also provides synchronization capability (SYNC) for multi-phase operation, allowing multiple controllers to work together and share the load evenly.

The soft-start and shutdown control (SS/TR) feature ensures a smooth power-up sequence and protects the system from sudden voltage spikes. This controller offers reliable and precise power management, making it suitable for a wide range of applications.

Detailed Application Field Plans

The UC3823BDW is commonly used in the following applications:

1. Switching Power Supplies: Provides efficient power conversion in various electronic devices.
2. Motor Control: Regulates motor speed and direction in industrial automation systems.
3. LED Lighting: Controls the brightness and intensity of LED lighting systems.
4. Battery Charging: Manages the charging process for batteries in portable devices.
5. Audio Amplifiers: Ensures stable power delivery in audio amplification circuits.

Detailed and Complete Alternative Models

1. UC3823A: Similar functionality with minor differences in specifications.
2. UC3823B: Improved version with enhanced features and performance.
3. UC3823C: Higher current handling capability for demanding applications.
4. UC3823D: Lower power consumption and improved efficiency.

These alternative models offer similar functionality to the UC3823BDW, catering to different application requirements and providing flexibility in design choices.

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