Overview
The UCC2804DTR/81260G4, produced by Texas Instruments, is a high-speed, low-power integrated circuit designed for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. This component is part of the UCC280x family, which includes all the necessary control and drive components to minimize the overall parts count in power supply designs. Although the UCC2804DTR/81260G4 is currently obsolete and no longer manufactured, it remains a significant component in the history of power supply design.
Key Specifications
| Specification | Value |
|---|---|
| Package | 8-pin SOIC (D) |
| Operating Temperature Range (°C) | -40 to 125 |
| Package Quantity | 2,500 (Carrier, LARGE T&R) |
| Typical Starting Supply Current | 100 µA |
| Typical Operating Supply Current | 500 µA |
| Maximum Operating Frequency | Up to 1 MHz |
| Output Type | 1-A totem-pole output |
| Response Time from Current-Sense to Gate Drive Output | 70 ns (typical) |
| Voltage Reference Tolerance | 1.5% |
Key Features
- Internal soft start and full-cycle soft start
- Internal leading-edge blanking of the current-sense input
- Same pinout as UC3842 and UC3842A
- High-speed operation up to 1 MHz
- Low power consumption with 100 µA typical starting supply current and 500 µA typical operating supply current
Applications
The UCC2804DTR/81260G4 is designed for use in off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. It is suitable for applications requiring high efficiency, low power consumption, and minimal component count. Typical applications include power adapters, DC-DC converters, and other switching power supply systems.
Q & A
- What is the UCC2804DTR/81260G4 used for?
The UCC2804DTR/81260G4 is used in off-line and DC-to-DC fixed frequency current-mode switching mode power supplies.
- What is the package type of the UCC2804DTR/81260G4?
The package type is 8-pin SOIC (D).
- What is the operating temperature range of the UCC2804DTR/81260G4?
The operating temperature range is -40 to 125 °C.
- What is the typical starting supply current of the UCC2804DTR/81260G4?
The typical starting supply current is 100 µA.
- What is the maximum operating frequency of the UCC2804DTR/81260G4?
The maximum operating frequency is up to 1 MHz.
- Does the UCC2804DTR/81260G4 have internal soft start?
Yes, it has internal soft start and full-cycle soft start.
- Is the UCC2804DTR/81260G4 still in production?
No, the UCC2804DTR/81260G4 is obsolete and no longer manufactured.
- What are some potential substitutes for the UCC2804DTR/81260G4?
Substitutes include components like the ISL6842IBZ-T from Renesas Electronics Corporation.
- What is the response time from current-sense to gate drive output?
The response time is typically 70 ns.
- What is the voltage reference tolerance of the UCC2804DTR/81260G4?
The voltage reference tolerance is 1.5%.
