Overview
The UC3844BD1013TR is a current mode PWM (Pulse Width Modulation) controller IC produced by STMicroelectronics. It belongs to the UC384xB family of control ICs, which are 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) | 16V (on), 10V (off) |
| Maximum Duty Cycle | Up to 50% with internal toggle flip flop |
| Start-Up and Operating Current | |
| Output Stage | Totem pole, capable of sourcing or sinking high peak current |
| Operating Temperature (°C) | -40 to 125 |
Key Features
- Low start-up and operating current (< 0.5mA)
- Under-voltage lockout with hysteresis
- Internally trimmed reference with under-voltage lockout
- Current limiting and latching PWM for cycle-by-cycle control
- Trimmed oscillator for precise frequency control
- High current totem pole output stage suitable for driving N-Channel MOSFETs
- Automatic feed forward compensation
Applications
The UC3844BD1013TR is suitable for a variety of power management applications, including off-line and DC to DC converters. It is particularly useful in boost, flyback, and other isolated or non-isolated power supply configurations. The IC's features make it ideal for applications requiring high efficiency, precise control, and reliability.
Q & A
- What is the UC3844BD1013TR used for? The UC3844BD1013TR is used for implementing off-line or DC to DC fixed frequency current mode control schemes in power management applications.
- What is the package type of the UC3844BD1013TR? The UC3844BD1013TR comes in an SO-8 package.
- What is the oscillator frequency range of the UC3844BD1013TR? The oscillator frequency is guaranteed at 250kHz and can operate up to 500kHz.
- What are the under-voltage lockout thresholds for the UC3844BD1013TR? The under-voltage lockout thresholds are 16V (on) and 10V (off).
- What is the maximum duty cycle of the UC3844BD1013TR? The maximum duty cycle is up to 50% with an internal toggle flip flop.
- What is the start-up and operating current of the UC3844BD1013TR? The start-up and operating current is less than 0.5mA.
- What type of output stage does the UC3844BD1013TR have? The output stage is a totem pole, capable of sourcing or sinking high peak current.
- What is the operating temperature range of the UC3844BD1013TR? The operating temperature range is -40°C to 125°C.
- Is the UC3844BD1013TR RoHS compliant? Yes, the UC3844BD1013TR is RoHS compliant with an Ecopack2 grade.
- What are some typical applications of the UC3844BD1013TR? Typical applications include boost, flyback, and other isolated or non-isolated power supply configurations.
