Overview
The UC2843BD1013TR is a high-performance current mode PWM (Pulse Width Modulation) controller from STMicroelectronics. It is part of the UC284xB family, designed to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. This IC is particularly useful for applications requiring precise duty cycle control, under-voltage lockout, and high current output capabilities.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SO-8 |
| Grade | Industrial |
| RoHS Compliance Grade | Ecopack2 |
| Oscillator Frequency | Guaranteed at 250kHz, up to 500kHz |
| Under-Voltage Lockout (UVLO) | 8.5V (on), 7.9V (off) |
| Maximum Duty Cycle | Approaching 100% |
| Operating Temperature | -40°C to 125°C |
| Start-Up and Operating Current | Less than 0.5mA |
Key Features
- Low start-up and operating current
- Under-voltage lockout with hysteresis
- Internally trimmed reference with under-voltage lockout
- Current limiting
- Trimmed oscillator for precise frequency control
- Current mode operation up to 500kHz
- Latching PWM for cycle-by-cycle control
- High current totem pole output stage suitable for driving N-Channel MOSFETs
- Automatic feed forward compensation
Applications
The UC2843BD1013TR is suitable for various power management applications, including off-line and DC to DC converters, boost, flyback, and step-up/step-down regulators. It is particularly useful in designs requiring high precision, reliability, and minimal external component count. Typical applications include power supplies, DC-DC converters, and other high-performance power management systems.
Q & A
- What is the UC2843BD1013TR used for? The UC2843BD1013TR is used for implementing off-line or DC to DC fixed frequency current mode control schemes in power management applications.
- What is the oscillator frequency of the UC2843BD1013TR? The oscillator frequency is guaranteed at 250kHz and can operate up to 500kHz.
- What are the under-voltage lockout thresholds for the UC2843BD1013TR? The under-voltage lockout thresholds are 8.5V (on) and 7.9V (off).
- What is the maximum duty cycle of the UC2843BD1013TR? The maximum duty cycle approaches 100%.
- What is the operating temperature range of the UC2843BD1013TR? The operating temperature range is -40°C to 125°C.
- What is the start-up and operating current of the UC2843BD1013TR? The start-up and operating current is less than 0.5mA.
- What type of output stage does the UC2843BD1013TR have? The UC2843BD1013TR has a high current totem pole output stage suitable for driving N-Channel MOSFETs.
- Is the UC2843BD1013TR RoHS compliant? Yes, the UC2843BD1013TR is RoHS compliant with an Ecopack2 grade.
- What package type is the UC2843BD1013TR available in? The UC2843BD1013TR is available in an SO-8 package.
- What are some typical applications of the UC2843BD1013TR? Typical applications include power supplies, DC-DC converters, and other high-performance power management systems.
