Overview
The UCC3803D/81468 is a high-speed, low-power integrated circuit designed for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. Produced by Unitrode, which is now part of Texas Instruments, this device is part of the UCC280x family. It is known for its minimal parts count and comprehensive control and drive components, making it an efficient choice for various power supply applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D) - 8 pins |
| Operating Temperature Range | 0°C to 70°C |
| Maximum Duty Cycle | 100% |
| Output Current | 1 A |
| Operating Frequency | Up to 1 MHz |
| Starting Supply Current | 100 µA (typical) |
| Operating Supply Current | 500 µA (typical) |
| Voltage Reference Tolerance | 1.5% |
Key Features
- Internal soft start and internal fault soft start
- Internal leading-edge blanking of the current-sense input
- 1-A totem-pole output
- 70-ns typical response from current-sense to gate drive output
- Same pinout as UC3842 and UC3842A
Applications
The UCC3803D/81468 is suitable for a variety of power supply applications, including off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. It is particularly useful in designs where a minimal parts count and high efficiency are required.
Q & A
- What is the operating temperature range of the UCC3803D/81468? The operating temperature range is from 0°C to 70°C.
- What is the maximum duty cycle of the UCC3803D/81468? The maximum duty cycle is 100%.
- What is the typical starting supply current of the UCC3803D/81468? The typical starting supply current is 100 µA.
- Does the UCC3803D/81468 have internal soft start? Yes, it has internal soft start and internal fault soft start.
- What is the response time from current-sense to gate drive output? The typical response time is 70 ns.
- Is the UCC3803D/81468 compatible with other ICs in terms of pinout? Yes, it has the same pinout as UC3842 and UC3842A.
- What is the maximum operating frequency of the UCC3803D/81468? The maximum operating frequency is up to 1 MHz.
- What is the output current capability of the UCC3803D/81468? The output current capability is 1 A.
- What is the voltage reference tolerance of the UCC3803D/81468? The voltage reference tolerance is 1.5%.
- What type of package does the UCC3803D/81468 come in? It comes in an SOIC (D) package with 8 pins.
