UCC3895DW

Product Overview

Category

UCC3895DW belongs to the category of integrated circuits (ICs) used in power management applications.

Use

This IC is primarily used for controlling and regulating power in various electronic systems, such as switch-mode power supplies (SMPS) and motor control circuits.

Characteristics

• UCC3895DW is a high-performance pulse width modulation (PWM) controller.
• It operates at a wide input voltage range, making it suitable for diverse applications.
• The IC incorporates advanced protection features, ensuring safe operation and preventing damage to connected devices.
• It offers excellent efficiency and precise control over power delivery.

Package

UCC3895DW is available in a small outline package (SOIC) with 16 pins. This package provides ease of integration into circuit boards and facilitates efficient heat dissipation.

Essence

The essence of UCC3895DW lies in its ability to regulate power efficiently and reliably, enabling optimal performance of electronic systems.

Packaging/Quantity

UCC3895DW is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 10V - 30V
• Output Voltage Range: 0V - 15V
• Maximum Output Current: 5A
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: 100kHz - 1MHz
• Control Method: Voltage Mode PWM

Detailed Pin Configuration

1. VREF: Reference voltage input
2. COMP: Error amplifier output
3. FB: Feedback voltage input
4. RT/CT: Timing components connection
5. CT: Timing capacitor connection
6. RT: Timing resistor connection
7. GND: Ground reference
8. VCC: Power supply input
9. VSENSE: Current sense input
10. SYNC: Synchronization input
11. SS/TR: Soft-start and tracking control
12. OSC: Oscillator timing capacitor connection
13. OSC: Oscillator timing resistor connection
14. DTC: Dead time control
15. OUT: Output voltage
16. DRV: Gate driver output

Functional Features

• Voltage mode PWM control for precise regulation of output voltage.
• Error amplifier with adjustable gain for accurate feedback control.
• Soft-start and tracking control for smooth power-up and shutdown sequences.
• Synchronization input for synchronization with external clock signals.
• Dead time control to prevent shoot-through current in bridge circuits.
• Integrated gate driver for efficient switching of power devices.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• Advanced protection features ensure safe operation and device longevity.
• High efficiency results in reduced power loss and improved energy utilization.
• Compact package facilitates easy integration into circuit designs.
• Precise control over power delivery enhances system performance.

Disadvantages

• Limited maximum output current may restrict usage in high-power applications.
• Requires external timing components for proper operation.
• May require additional circuitry for specific application requirements.

Working Principles

UCC3895DW operates based on the voltage mode PWM control method. It compares 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 adjust the duty cycle of the PWM signal. By modulating the duty cycle, the IC regulates the output voltage according to the desired setpoint.

The oscillator (OSC) generates a clock signal that determines the switching frequency of the PWM signal. The timing components (RT/CT) connected to pins 4, 5, 6, 12, and 13 control the oscillator frequency and the dead time between complementary PWM signals.

The gate driver (DRV) provides the necessary drive voltage to switch the power devices connected to the output (OUT) pin. This enables efficient power transfer from the input to the output, while the integrated protection features safeguard against overcurrent, overvoltage, and overheating conditions.

Detailed Application Field Plans

UCC3895DW finds extensive application in various fields, including: 1. Switch-mode power supplies (SMPS) for computers, telecommunication equipment, and industrial machinery. 2. Motor control circuits in robotics, automotive systems, and home appliances. 3. LED lighting systems for residential, commercial, and outdoor applications. 4. Renewable energy systems such as solar inverters and wind turbine controllers. 5. Battery charging circuits for electric vehicles, portable electronics, and energy storage systems.

Detailed and Complete Alternative Models

1. UCC3895PW: Similar to UCC3895DW but available in a different package (TSSOP).
2. UC3845B: PWM controller with similar functionality but optimized for lower voltage applications.
3. LM5039: Advanced PWM controller