Overview
The UCC2808D-1 is a current-mode PWM controller produced by Texas Instruments. This device is designed for use in low-power current-mode switching power supplies and is particularly suited for applications requiring minimal external components. The UCC2808D-1 features a push-pull configuration with dual output drive stages, making it ideal for server and desktop power supplies, telecom power supplies, DC-DC converters, and switched-mode power supplies.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 8.3 | - | 14 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Junction Temperature Range | -55 | - | 150 | °C |
| Oscillator Frequency | 175 | 194 | 213 | kHz |
| Output Drive Stages Source Current (Peak) | - | - | 0.5 A | A |
| Output Drive Stages Sink Current (Peak) | - | - | 1.0 A | A |
| Maximum Duty Cycle | - | - | 50% | % |
| Turn On Threshold (UVLO) | 12.5 | - | - | V |
| Turn Off Threshold (UVLO) | - | - | 8.3 | V |
Key Features
- Current-mode switching with minimal external parts count
- Operation up to 1 MHz
- Internal soft-start
- On-chip error amplifier with 2-MHz gain bandwidth product
- On-chip VDD clamping
- Output drive stages capable of 500-mA peak source current and 1-A peak sink current
- Under-voltage lockout (UVLO) protection with hysteresis
- Internal oscillator with frequency adjustable via external RC components
- Low quiescent current of 1 mA typical
Applications
- Server and desktop power supplies
- Telecom power supplies
- DC-DC converters
- Switched-mode power supplies
Q & A
- What is the typical operating frequency of the UCC2808D-1?
The typical operating frequency of the UCC2808D-1 is around 194 kHz, with a range of 175 kHz to 213 kHz.
- What is the maximum duty cycle of the UCC2808D-1?
The maximum duty cycle of the UCC2808D-1 is 50%.
- What are the turn-on and turn-off thresholds for the under-voltage lockout (UVLO) of the UCC2808D-1?
The turn-on threshold is 12.5 V, and the turn-off threshold is 8.3 V.
- What is the recommended package type for the UCC2808D-1?
The UCC2808D-1 is available in an 8-pin SOIC package.
- What is the operating temperature range of the UCC2808D-1?
The operating temperature range of the UCC2808D-1 is from -40°C to 85°C.
- What is the typical quiescent current of the UCC2808D-1?
The typical quiescent current of the UCC2808D-1 is 1 mA.
- Does the UCC2808D-1 have internal soft-start capability?
Yes, the UCC2808D-1 has an internal soft-start feature.
- What is the peak source and sink current capability of the output drive stages?
The output drive stages are capable of 500-mA peak source current and 1-A peak sink current.
- What type of applications is the UCC2808D-1 suited for?
The UCC2808D-1 is suited for server and desktop power supplies, telecom power supplies, DC-DC converters, and switched-mode power supplies.
- How can the oscillator frequency be adjusted in the UCC2808D-1?
The oscillator frequency can be adjusted using external RC components.
