Overview
The SEA05TR from STMicroelectronics is a highly integrated advanced constant voltage and constant current (CV/CC) controller designed for Switch-Mode Power Supply (SMPS) applications. This device is optimized for dual control loop operations, ensuring precise regulation of both voltage and current. The SEA05TR is housed in a compact SOT23-6L package, making it ideal for space-constrained applications such as adapters and chargers.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Vcc Operating Range | 3.5 | - | 36 | V |
| Quiescent Current (Icc) | 200 | 300 | - | µA |
| Voltage Reference | 2.488 | 2.5 | 2.512 | V |
| Voltage Control Loop Accuracy | - | +/- 0.5% | - | % |
| Current Sense Threshold (Vcsth) | 46 | 50 | 54 | mV |
| Output Stage Low Level @ 2 mA Sink Current | 200 | - | 400 | mV |
| Junction Temperature Operating Range | -40 | - | 150 | °C |
| Storage Temperature | -55 | - | 150 | °C |
Key Features
- Constant voltage and constant current control
- Wide operating Vcc range from 3.5 V to 36 V
- Low quiescent consumption of 200 µA
- Internal voltage reference set at 2.5 V with +/- 0.5% accuracy
- Current sense threshold of 50 mV
- Open-drain output stage
- Low external component count
- Compact SOT23-6L micro package
Applications
- Battery chargers
- AC-DC adapters
- LED drivers
Q & A
- What is the primary function of the SEA05TR?
The SEA05TR is a dual control loop controller for constant voltage and constant current regulation in SMPS applications.
- What is the operating voltage range of the SEA05TR?
The operating voltage range is from 3.5 V to 36 V.
- What is the quiescent current consumption of the SEA05TR?
The quiescent current consumption is 200 µA.
- What is the accuracy of the internal voltage reference?
The internal voltage reference has an accuracy of +/- 0.5%.
- What is the current sense threshold of the SEA05TR?
The current sense threshold is 50 mV.
- What type of output stage does the SEA05TR have?
The SEA05TR has an open-drain output stage.
- In what package is the SEA05TR available?
The SEA05TR is available in a SOT23-6L micro package.
- What are some common applications of the SEA05TR?
Common applications include battery chargers, AC-DC adapters, and LED drivers.
- How does the SEA05TR protect against negative voltage at the Ictrl pin?
A 15 Ω resistor in series with the Ictrl pin can help protect the IC against negative voltage exceeding the absolute maximum rating.
- What is the junction temperature operating range of the SEA05TR?
The junction temperature operating range is from -40°C to 150°C.
