Overview
The UC2843BD1G is a high-performance current mode PWM (Pulse Width Modulation) controller manufactured by onsemi. This device is designed for use in various power management applications, including off-line and DC-to-DC converters. It features a trimmed oscillator for precise frequency control, ensuring reliable and efficient operation. The UC2843BD1G is part of the UC2843 series, known for its high performance, cost-effectiveness, and flexibility in power supply designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC-8 | |
| Control Mode | Current Mode | |
| Switching Frequency (Typical) | 250 kHz to 500 kHz | kHz |
| Maximum Operating Supply Voltage | 30 V | V |
| Output Current (Peak) | 1 A | A |
| Undervoltage Lockout (UVLO) | Yes, with hysteresis | |
| Maximum Duty Cycle | 96% | % |
| Operating Temperature Range | -40°C to 125°C | °C |
| RoHS Compliance | Yes |
Key Features
- Trimmed Oscillator: Precise frequency control with a guaranteed oscillator frequency at 250 kHz and operation up to 500 kHz.
- Automatic Feed-Forward Compensation: Enhances performance by compensating for variations in the oscillator discharge current.
- Latching PWM: Provides cycle-by-cycle current limiting for robust protection.
- Internally Trimmed Reference: Includes undervoltage lockout with hysteresis for reliable operation.
- High Current Totem Pole Output: Capable of delivering 1 A of peak current for reliable power delivery.
- Low Startup and Operating Currents: Efficient energy usage with low startup and operating currents.
- Pb-Free Packages: Available for environmental compatibility.
- Undervoltage Lockout with Hysteresis: Robust protection against voltage drops.
Applications
The UC2843BD1G is suitable for a variety of applications, including:
- Motor Control: Ideal for motor control in conveyor systems and other industrial automation.
- Power Supply Circuits: Used in power supply circuits for industrial equipment and other high-reliability applications.
- Off-Line and DC-to-DC Converters: Optimized for use in off-line and DC-to-DC converter applications.
- Industrial PSU and Battery Operated PSU: Suitable for industrial power supplies and battery-operated power supplies.
Q & A
- What is the typical switching frequency of the UC2843BD1G?
The typical switching frequency of the UC2843BD1G is 250 kHz, with operation up to 500 kHz.
- What is the maximum operating supply voltage for the UC2843BD1G?
The maximum operating supply voltage for the UC2843BD1G is 30 V.
- Does the UC2843BD1G have undervoltage lockout protection?
Yes, the UC2843BD1G features undervoltage lockout with hysteresis for robust protection.
- What is the peak output current of the UC2843BD1G?
The peak output current of the UC2843BD1G is 1 A.
- Is the UC2843BD1G RoHS compliant?
Yes, the UC2843BD1G is RoHS compliant.
- What are the key features of the UC2843BD1G's oscillator?
The UC2843BD1G features a trimmed oscillator for precise frequency control, with a guaranteed oscillator frequency at 250 kHz and operation up to 500 kHz.
- What types of applications is the UC2843BD1G suitable for?
The UC2843BD1G is suitable for motor control, power supply circuits, off-line and DC-to-DC converters, and industrial PSU and battery-operated PSU applications.
- Does the UC2843BD1G support latching PWM?
Yes, the UC2843BD1G supports latching PWM for cycle-by-cycle current limiting.
- What is the operating temperature range of the UC2843BD1G?
The operating temperature range of the UC2843BD1G is -40°C to 125°C.
- Is the UC2843BD1G available in Pb-free packages?
Yes, the UC2843BD1G is available in Pb-free packages for environmental compatibility.
