Overview
The UC2844BD1R2G is a high-performance Pulse Width Modulation (PWM) controller IC produced by onsemi. This device is designed for use in switch-mode power supplies, particularly in boost and flyback configurations. It features a robust set of specifications and functionalities that make it suitable for a wide range of applications requiring efficient and reliable power management.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Voltage Supply (Vcc/Vdd) | Vcc | 10 | - | 36 | V |
| Switching Frequency | fSW | - | - | 500 | kHz |
| Duty Cycle (Max) | D | - | - | 48% | % |
| Output Current - Sink | ISink | - | - | 12 | mA |
| Output Current - Source | ISource | - | - | 12 | mA |
| Undervoltage Lockout (VCC) | VCC UVLO | 16 | - | 10 | V |
| Undervoltage Lockout (Vref) | Vref UVLO | 3.6 | - | 3.4 | V |
| Power Supply Rejection Ratio (PSRR) | PSRR | 60 | 70 | - | dB |
Key Features
- High Performance PWM Controller: Designed for boost and flyback switch-mode power supplies.
- Wide Operating Voltage Range: Supports voltage supply from 10V to 36V.
- High Switching Frequency: Up to 500 kHz switching frequency.
- Undervoltage Lockout (UVLO): Ensures the IC is fully functional before enabling the output stage, with separate comparators for VCC and Vref.
- Low Startup Current: Minimizes power consumption during startup.
- High Power Supply Rejection Ratio (PSRR): Provides robust noise immunity.
- Current Sense Input: Features current sense input voltage gain and maximum current sense input threshold.
Applications
- Switch-Mode Power Supplies: Ideal for boost and flyback configurations.
- DC-DC Converters: Suitable for various DC-DC conversion applications.
- Power Management Systems: Used in systems requiring efficient and reliable power management.
- Industrial and Consumer Electronics: Applicable in a wide range of electronic devices and systems.
Q & A
- What is the operating voltage range of the UC2844BD1R2G?
The operating voltage range is from 10V to 36V.
- What is the maximum switching frequency of the UC2844BD1R2G?
The maximum switching frequency is up to 500 kHz.
- Does the UC2844BD1R2G have undervoltage lockout (UVLO) protection?
- What is the power supply rejection ratio (PSRR) of the UC2844BD1R2G?
The PSRR is 60 dB to 70 dB.
- What are the typical output current sink and source values for the UC2844BD1R2G?
The typical output current sink and source values are up to 12 mA each.
- What are the common applications of the UC2844BD1R2G?
- Does the UC2844BD1R2G support synchronous rectification?
No, it does not support synchronous rectification.
- What is the duty cycle limit of the UC2844BD1R2G?
The maximum duty cycle is 48%.
- What is the current sense input voltage gain of the UC2844BD1R2G?
The current sense input voltage gain is between 2.85 and 3.25 V/V.
- What is the maximum current sense input threshold of the UC2844BD1R2G?
The maximum current sense input threshold is between 0.9 and 1.1 V.
