Overview
The UC2843AQD8R is a high-performance current-mode PWM controller produced by Texas Instruments. Designed for power supply applications, this IC is part of the UC284x family, known for its precision and reliability in switching power supplies. The UC2843AQD8R is particularly suited for offline and DC-to-DC converter applications, offering robust features such as adjustable switching frequency, cycle-by-cycle current limiting, and undervoltage lockout. Its target user groups include power supply designers, industrial automation engineers, and consumer electronics manufacturers. The product stands out for its low start-up current, high accuracy, and wide operating temperature range, making it a competitive choice in the power management market.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Input Voltage | 8.2 to 30 | V | Operating range |
| Switching Frequency | Up to 500 | kHz | Adjustable |
| Start-Up Current | 0.5 | mA | Typical |
| Output Current | ±1 | A | Peak |
| Operating Temperature | -40 to 85 | °C | Range |
| Package | SOIC-8 | - | Surface mount |
| Undervoltage Lockout | 8.2 | V | Typical |
| Duty Cycle | Up to 50 | % | Maximum |
| Current Limit Threshold | 1 | V | Typical |
| Error Amplifier Gain | 95 | dB | Typical |
Key Features
- High-performance current-mode PWM control for precise power regulation.
- Adjustable switching frequency up to 500 kHz for flexible design.
- Low start-up current (0.5 mA typical) for efficient operation.
- Cycle-by-cycle current limiting for enhanced protection.
- Undervoltage lockout ensures reliable start-up and shutdown.
- Wide operating temperature range (-40°C to 85°C) for robust performance in harsh environments.
Applications
The UC2843AQD8R is widely used in various power supply applications, including offline converters, DC-to-DC converters, and battery chargers. Its precision and reliability make it ideal for industrial automation systems, where stable power delivery is critical. In consumer electronics, it is employed in power adapters and LED drivers. Additionally, its robust features suit automotive electronics, ensuring consistent performance in demanding conditions. The IC's versatility and efficiency make it a preferred choice for engineers designing compact and reliable power solutions.
Q & A
1. What is the operating voltage range of the UC2843AQD8R?
The operating voltage range is 8.2 V to 30 V.
2. Can the switching frequency be adjusted?
Yes, the switching frequency is adjustable up to 500 kHz.
3. What is the typical start-up current?
The typical start-up current is 0.5 mA.
4. Does the UC2843AQD8R support cycle-by-cycle current limiting?
Yes, it features cycle-by-cycle current limiting for enhanced protection.
5. What is the maximum duty cycle?
The maximum duty cycle is 50%.
6. What is the package type of the UC2843AQD8R?
It comes in an SOIC-8 surface mount package.
7. What is the undervoltage lockout threshold?
The undervoltage lockout threshold is typically 8.2 V.
8. Is the UC2843AQD8R suitable for automotive applications?
Yes, its wide operating temperature range and robust features make it suitable for automotive electronics.
9. What is the error amplifier gain?
The error amplifier gain is typically 95 dB.
10. Can it be used in battery charger designs?
Yes, it is commonly used in battery charger applications due to its precision and reliability.
