Overview
The TPS2561DRCR, produced by Texas Instruments, is a dual-channel, current-limited power-distribution switch designed for applications requiring precision current limiting and the ability to handle heavy capacitive loads and short circuits. This device utilizes N-channel MOSFETs and features adjustable current limits, fast overcurrent response, and built-in soft-start functionality. It is particularly suited for applications where reliable and controlled power distribution is crucial.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 2.5 | - | 6.5 | V |
| Current Limit Range | 250 mA | - | 2.8 A | - |
| Current-Limit Accuracy at 2.8 A | - | ±7.5% | - | - |
| Overcurrent Response Time | - | 3.5 μs | - | μs |
| Static Drain-Source On-State Resistance | 44 | 50 | 70 | mΩ |
| Standby Supply Current | - | 2 μA | - | μA |
| Junction-to-Ambient Thermal Resistance | - | 47.8 | - | °C/W |
| Package Type | - | VSON (10-pin) | - | - |
| Body Size | - | 3.00 mm × 3.00 mm | - | - |
Key Features
- Two separate current limiting channels with adjustable current limits between 250 mA and 2.8 A per channel.
- Meets USB current-limiting requirements.
- Fast overcurrent response time of 3.5 μs (typical).
- Two 44-mΩ high-side MOSFETs.
- Built-in soft-start functionality to minimize current surges during turn-on and turn-off.
- 15-kV, 8-kV system-level ESD capability.
- UL listed (file no. E169910) and CB and Nemko certified.
- Low standby supply current of 2 μA maximum.
- FAULTx logic output signals for overcurrent and overtemperature conditions.
- Internal thermal sensing and cycling to prevent overheating.
Applications
- USB ports and hubs.
- Digital TVs.
- Set-top boxes.
- VOIP phones.
Q & A
- What is the operating voltage range of the TPS2561DRCR?
The operating voltage range is from 2.5 V to 6.5 V.
- How is the current limit set on the TPS2561DRCR?
The current limit is set using an external resistor (RILIM) connected to the ILIM pin, allowing for a programmable current-limit threshold between 250 mA and 2.8 A per channel.
- What is the typical response time to an overcurrent condition?
The typical response time to an overcurrent condition is 3.5 μs.
- What type of MOSFETs are used in the TPS2561DRCR?
The device uses N-channel MOSFETs.
- Does the TPS2561DRCR have built-in thermal protection?
Yes, it has internal thermal sensing and cycling to prevent overheating, turning off the power switch when the junction temperature exceeds 135°C and restarting once it cools down by approximately 20°C.
- What are the FAULTx signals used for?
The FAULTx signals are active-low open-drain outputs that are asserted during overcurrent or overtemperature conditions on each channel.
- What is the purpose of the soft-start feature?
The soft-start feature controls the rise and fall times of the output voltage to minimize large current and voltage surges during turn-on and turn-off.
- Is the TPS2561DRCR certified by any regulatory bodies?
Yes, it is UL listed (file no. E169910) and CB and Nemko certified.
- What is the typical standby supply current of the TPS2561DRCR?
The typical standby supply current is 2 μA.
- What are some common applications for the TPS2561DRCR?
Common applications include USB ports and hubs, digital TVs, set-top boxes, and VOIP phones.
