Overview
The UC3845BVDR2 is a high-performance fixed frequency current mode controller from onsemi. It is part of the UC3845B series, which is specifically designed for off-line and DC-DC converter applications. This controller offers a cost-effective solution with minimal external components, making it an ideal choice for designers seeking efficient and reliable power management.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Current - Max | 17 | mA |
| Supply Voltage | 7.6V to 36V | V |
| Turn On Threshold Voltage | 8.4V | V |
| Turn Off Threshold Voltage | 7.6V | V |
| Duty Cycle - Max | 50% | % |
| Frequency - Max | 275kHz | kHz |
| Operating Temperature Range | -40°C to +105°C | °C |
| Package Style | SOIC-8 | |
| Mounting Method | Surface Mount | |
| Storage Temperature Range | -65°C to +150°C | °C |
Key Features
- Trimmed Oscillator for Precise Frequency Control
- Oscillator Frequency Guaranteed at 250 kHz
- Current Mode Operation to 500 kHz Output Switching Frequency
- Output Deadtime Adjustable from 50% to 70%
- Automatic Feed Forward Compensation
- Latching PWM for Cycle-By-Cycle Current Limiting
- Internally Trimmed Reference with Undervoltage Lockout
- High Current Totem Pole Output
- Undervoltage Lockout with Hysteresis
- Low Startup and Operating Current
- Pb-Free and RoHS Compliant
Applications
The UC3845BVDR2 is specifically designed for off-line and DC-DC converter applications. It is suitable for a wide range of power management scenarios, including but not limited to:
- Switch Mode Power Supplies (SMPS)
- DC-DC Converters
- Power Factor Correction (PFC) Circuits
- High-Efficiency Power Conversion Systems
Q & A
- What is the primary function of the UC3845BVDR2?
The UC3845BVDR2 is a high-performance fixed frequency current mode controller designed for off-line and DC-DC converter applications.
- What is the maximum supply voltage for the UC3845BVDR2?
The maximum supply voltage is 36V.
- What is the operating temperature range of the UC3845BVDR2?
The operating temperature range is -40°C to +105°C.
- What package style is the UC3845BVDR2 available in?
The UC3845BVDR2 is available in an SOIC-8 package.
- What is the maximum duty cycle of the UC3845BVDR2?
The maximum duty cycle is 50%.
- Does the UC3845BVDR2 have undervoltage lockout (UVLO) protection?
- What is the oscillator frequency guaranteed at for the UC3845BVDR2?
The oscillator frequency is guaranteed at 250 kHz.
- Is the UC3845BVDR2 Pb-Free and RoHS Compliant?
- What type of output does the UC3845BVDR2 have?
The UC3845BVDR2 has a high current totem pole output.
- Can the output deadtime of the UC3845BVDR2 be adjusted?
