UC3823ADWG4

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: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 8V to 35V
• Output Voltage Range: 5V to 20V
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: 100kHz to 1MHz
• Maximum Duty Cycle: 50%
• Output Current: Up to 1.5A

Detailed Pin Configuration

1. VREF: Reference voltage input
2. COMP: Error amplifier output
3. FB: Feedback voltage input
4. RT/CT: Timing resistor/capacitor connection
5. CT: Timing capacitor connection
6. OSC: Oscillator timing capacitor connection
7. GND: Ground
8. SYNC: Synchronization input
9. VCC: Supply voltage input
10. DRVH: High-side gate driver output
11. DRVL: Low-side gate driver output
12. ISENSE: Current sense input
13. SS/TR: Soft-start/tracking control
14. UVLO: Undervoltage lockout input
15. SD: Shutdown control input
16. REF: Reference voltage output

Functional Features

• High-performance pulse-width modulation (PWM) controller
• Wide input voltage range for versatile applications
• Adjustable output voltage for flexibility
• Wide operating temperature range for reliability
• Synchronization input for multi-phase operation
• Soft-start/tracking control for smooth startup
• Undervoltage lockout protection for system safety
• Shutdown control input for power management

Advantages and Disadvantages

Advantages

• High-performance regulation and control of power delivery
• Wide input voltage range allows for various power sources
• Adjustable output voltage provides flexibility in applications
• Synchronization input enables multi-phase operation for higher power handling
• Soft-start/tracking control ensures smooth startup without excessive current spikes
• Undervoltage lockout protection prevents damage to the system
• Shutdown control input allows for efficient power management

Disadvantages

• Limited maximum duty cycle may restrict certain applications requiring higher duty cycles
• Output current limited to 1.5A, which may not be sufficient for high-power applications

Working Principles

The UC3823ADWG4 is a high-performance PWM controller that regulates and controls power delivery in various applications. It operates by comparing the feedback voltage (FB) with the reference voltage (VREF) to generate an error signal. This error signal is then amplified and used to adjust the duty cycle of the PWM signal, which controls the power delivered to the load.

The IC features an internal oscillator (OSC) that sets the switching frequency of the PWM signal. The timing resistor (RT) and timing capacitor (CT) connected to the RT/CT pin determine the oscillator frequency. By adjusting these external components, the switching frequency can be set within a wide range.

The UC3823ADWG4 also includes gate drivers (DRVH and DRVL) that provide the necessary drive signals to control the high-side and low-side power switches. These gate drivers ensure efficient switching of the power MOSFETs or IGBTs used in the power stage of the application.

Detailed Application Field Plans

The UC3823ADWG4 is commonly used in various power management applications, including:

1. Switching Power Supplies: The IC is widely employed in switch-mode power supplies (SMPS) to regulate and control the power delivery to different loads. Its adjustable output voltage and wide input voltage range make it suitable for a broad range of SMPS designs.

2. LED Lighting: The UC3823ADWG4 is utilized in LED lighting applications to provide efficient power regulation and control. It enables precise dimming control and ensures stable operation of LED drivers.

3. Motor Control: The IC finds application in motor control circuits, where it regulates the power delivered to motors. Its synchronization input allows for multi-phase motor control, enabling higher power handling and improved efficiency.

4. Battery Charging: The UC3823ADWG4 is employed in battery charging circuits to control the charging process. Its adjustable output voltage and soft-start/tracking control ensure safe and efficient charging of various types of batteries.

Detailed and Complete Alternative Models

1. UC3823BNG4: Similar to UC3823ADWG4 but available in PDIP-16 package.
2. UC3823AQ: Enhanced version with additional features such as overvoltage protection and current limiting.
3. UC3823DWG4: Surface-mount version with improved thermal