Overview
The UCC3808ADTR-1 is a low-power, current-mode push-pull pulse-width modulator (PWM) controller produced by Texas Instruments. It is part of the UCCx808A family, which is designed for off-line or DC-to-DC fixed frequency switching power supplies. This device is characterized by its high-speed operation, minimal external parts count, and enhanced features such as an internal discharge transistor to improve dynamic response.
Key Specifications
| Specification | Value |
|---|---|
| Package | 8-SOIC (D) |
| Pins | 8 |
| Operating Temperature Range | 0°C to 70°C |
| UVLO Thresholds | 12.5V / 8.3V |
| Supply Voltage (Vcc/Vdd) | 8.3V ~ 15V |
| Switching Frequency | Up to 1 MHz |
| Output Drive Stages | 500-mA Peak-Source Current, 1-A Peak-Sink Current |
| Starting Current | 130 µA Typical |
| Run Current | 1 mA Typical |
| Dead Time | 60 ns to 200 ns |
| Duty Cycle | < 50% |
Key Features
- Dual-Output Drive Stages in Push-Pull Configuration
- Current-Sense Discharge Transistor to Improve Dynamic Response
- Internal Soft Start
- On-Chip Error Amplifier With 2-MHz Gain Bandwidth Product
- On-Chip VDD Clamping
- Operation to 1 MHz
Applications
The UCC3808ADTR-1 is suitable for various power supply applications, including off-line and DC-to-DC fixed frequency switching power supplies. It is particularly useful in systems that require high-speed operation, low power consumption, and minimal external component count. Typical applications include boost, buck, half-bridge, and push-pull topologies.
Q & A
- What is the UCC3808ADTR-1 used for? The UCC3808ADTR-1 is used as a low-power, current-mode push-pull PWM controller for off-line or DC-to-DC fixed frequency switching power supplies.
- What is the operating temperature range of the UCC3808ADTR-1? The operating temperature range is 0°C to 70°C.
- What are the UVLO thresholds for the UCC3808ADTR-1? The UVLO thresholds are 12.5V and 8.3V.
- What is the maximum switching frequency of the UCC3808ADTR-1? The maximum switching frequency is up to 1 MHz.
- What is the typical starting current of the UCC3808ADTR-1? The typical starting current is 130 µA.
- What is the typical run current of the UCC3808ADTR-1? The typical run current is 1 mA.
- What is the dead time between the two output stages? The dead time is typically 60 ns to 200 ns.
- What is the maximum duty cycle for each output stage? The maximum duty cycle is less than 50%.
- Does the UCC3808ADTR-1 have an internal soft start feature? Yes, it does have an internal soft start feature.
- What is the gain bandwidth product of the on-chip error amplifier? The gain bandwidth product of the on-chip error amplifier is 2 MHz.
