Overview
The UCC2804DTR is a low-power BiCMOS current-mode PWM (Pulse Width Modulation) controller manufactured by Texas Instruments. This device is part of the UCC280x family, which is designed for use in off-line and DC-to-DC fixed frequency switching mode power supplies. The UCC2804DTR is known for its high-speed operation, minimal parts count, and compatibility with the UC3842 and UC3842A families. Although marked as obsolete by Texas Instruments, it remains suitable for existing designs where compatibility is crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 8-SOIC | |
| Pins | 8 | |
| Operating Temperature Range | -40°C to 125°C | °C |
| Input Voltage | -0.3V to 6.3V | V |
| Supply Voltage | 8.3V to 11V | V |
| Supply Current | 500 μA | μA |
| Maximum Duty Cycle | 50% | % |
| Oscillator Frequency | Up to 1 MHz | Hz |
| Output Current | 1 A | A |
| Voltage Reference Tolerance | 1.5% | % |
| Response Time (Current Sense to Gate Drive) | 70 ns | ns |
Key Features
- PWM (Pulse Width Modulation) controller
- Low-power BiCMOS technology
- Low starting supply current: typically 100 μA
- Low operating supply current: typically 500 μA
- Internal soft start and full-cycle 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
- Pinout compatible with UC3842 and UC3842A families
- Up to 1-MHz oscillator frequency
Applications
- Power supply design for industrial automation and control systems
- High-precision signal processing applications in various industries
- Medical device power supplies requiring high stability and accuracy
- Consumer electronics with advanced power management requirements
- Off-line and DC-to-DC fixed frequency switching mode power supplies
Q & A
- What is the UCC2804DTR used for?
The UCC2804DTR is used as a PWM controller in off-line and DC-to-DC fixed frequency switching mode power supplies.
- What is the operating temperature range of the UCC2804DTR?
The operating temperature range is -40°C to 125°C.
- What is the maximum duty cycle of the UCC2804DTR?
The maximum duty cycle is 50%.
- What is the typical supply current of the UCC2804DTR?
The typical supply current is 500 μA.
- Is the UCC2804DTR pinout compatible with other devices?
Yes, it is pinout compatible with the UC3842 and UC3842A families.
- What is the oscillator frequency range of the UCC2804DTR?
The oscillator frequency can go up to 1 MHz.
- What are the key features of the UCC2804DTR's soft start capability?
The device features internal soft start and full-cycle soft start.
- 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?
The voltage reference tolerance is 1.5%.
- Is the UCC2804DTR still available for purchase despite being marked as obsolete?
Yes, it may still be available from various suppliers, although it is marked as obsolete by Texas Instruments.
