Overview
The UCC3804N is a high-speed, low-power integrated circuit designed by Texas Instruments for use in off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. This IC is part of the UCC280x family and is known for its minimal parts count and robust feature set. It is particularly useful in applications requiring efficient and reliable power conversion with a high degree of control over the switching process.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | 8-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| Topology | Boost, Buck, Flyback, Forward |
| Voltage - Start Up | 12.5V |
| Voltage - Supply (Vcc/Vdd) | 8.3 V ~ 12 V |
| Duty Cycle | 0 ~ 49% |
| Frequency - Switching | Up to 1MHz |
| Fault Protection | Current Limiting |
| Control Features | Frequency Control |
| Operating Temperature | -40°C ~ 85°C (TA) |
Key Features
- 100-µA typical starting supply current and 500-µA typical operating supply current
- Operation up to 1 MHz
- Internal soft start and internal fault soft start
- Internal leading-edge blanking of the current sense signal
- 1-A totem-pole output
- 70-ns typical response from current-sense to gate drive output
- 1.5% tolerance voltage reference
- Same pinout as UC3842 and UC3842A
Applications
The UCC3804N is designed for use in off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. It is suitable for a variety of applications, including but not limited to:
- Power supplies for consumer electronics
- Industrial power systems
- Telecommunication equipment
- Automotive systems requiring high reliability and efficiency
Q & A
- What is the UCC3804N used for?
The UCC3804N is used in off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. - What is the package type of the UCC3804N?
The UCC3804N comes in an 8-DIP (0.300", 7.62mm) package. - What is the operating temperature range of the UCC3804N?
The operating temperature range is -40°C to 85°C. - What are the key features of the UCC3804N?
Key features include internal soft start, internal fault soft start, 1-A totem-pole output, and a 1.5% tolerance voltage reference. - What is the switching frequency range of the UCC3804N?
The switching frequency range is up to 1 MHz. - Does the UCC3804N have fault protection?
Yes, it has current limiting fault protection. - What is the duty cycle range of the UCC3804N?
The duty cycle range is 0 to 49%. - Is the UCC3804N still in production?
No, the UCC3804N is no longer manufactured but may still be available from distributors. - What are the typical supply currents for the UCC3804N?
The typical starting supply current is 100 µA, and the typical operating supply current is 500 µA. - What is the response time from current-sense to gate drive output?
The typical response time is 70 ns.
