Overview
The onsemi UC2843BDR2G is a high-performance current mode controller designed for off-line and DC-DC converter applications. This device is part of the UC2843B series, which offers a cost-effective solution with minimal external components. The UC2843BDR2G is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) package, which includes separate power and ground pins for the totem pole output stage, enhancing its functionality and reliability.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | onsemi |
| Part Number | UC2843BDR2G |
| Package | SOIC-14 |
| Supply Voltage | 7.6V to 30V |
| Switching Frequency | Up to 500 kHz |
| Duty Cycle | Up to 96% |
| Topology | Boost, Flyback |
| Operating Temperature Range | -25°C to +85°C |
| Output Current (Source/Sink) | Up to 1.0 A |
| Undervoltage Lockout (UVLO) Thresholds | Turn On: 8.5V, Turn Off: 7.6V |
Key Features
- Trimmed Oscillator for Precise Frequency Control: The oscillator frequency is programmable using external timing components RT and CT.
- Current Mode Operation: Supports operation up to 500 kHz.
- Automatic Feed Forward Compensation: Enhances stability and performance.
- Latching PWM for Cycle-by-Cycle Current Limiting: Provides robust overcurrent protection.
- Internally Trimmed Reference with Undervoltage Lockout: Includes hysteresis for reliable startup and operation.
- High Current Totem Pole Output: Suitable for driving power MOSFETs.
- Low Startup and Operating Current: Minimizes power consumption.
- Pb-Free and Halide-Free Device: Compliant with environmental regulations.
Applications
The UC2843BDR2G is specifically designed for off-line and DC-DC converter applications. It is ideal for use in:
- Switch-mode power supplies
- DC-DC converters
- High-efficiency power management systems
- Industrial power supplies
- Consumer electronics power management
Q & A
- What is the package type of the UC2843BDR2G?
The UC2843BDR2G is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) package.
- What is the supply voltage range for the UC2843BDR2G?
The supply voltage range is from 7.6V to 30V.
- What is the maximum switching frequency of the UC2843BDR2G?
The maximum switching frequency is up to 500 kHz.
- What are the undervoltage lockout (UVLO) thresholds for the UC2843BDR2G?
The turn-on threshold is 8.5V, and the turn-off threshold is 7.6V.
- What is the maximum output current of the UC2843BDR2G?
The maximum output current is up to 1.0 A.
- What are the key features of the UC2843BDR2G?
Key features include a trimmed oscillator, current mode operation, automatic feed forward compensation, latching PWM, internally trimmed reference with UVLO, high current totem pole output, and low startup and operating current.
- What are the typical applications of the UC2843BDR2G?
Typical applications include switch-mode power supplies, DC-DC converters, high-efficiency power management systems, industrial power supplies, and consumer electronics power management.
- Is the UC2843BDR2G Pb-Free and Halide-Free?
- What is the operating temperature range of the UC2843BDR2G?
The operating temperature range is from -25°C to +85°C.
- How is the oscillator frequency programmed in the UC2843BDR2G?
The oscillator frequency is programmed using external timing components RT and CT.
