Overview
The STCC2540IQTR, produced by STMicroelectronics, is a highly integrated USB charging controller that combines a USB charger controller, a wide bandwidth data switch, and a high current power switch in a single package. This device is designed to emulate various charging profiles, including those compliant with the USB battery charging standard BC1.2, the Chinese telecommunications standard YD/T 1591-2009, and proprietary charger modes such as Apple and BlackBerry.
It is particularly useful in applications where a host device needs to emulate a wall charger adapter, especially when the host is battery-supplied, to optimize power consumption. The device supports remote wakeup in S3 states and provides charging indication outputs in DCP and CDP modes.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VIN) | 4.5 to 5.5 | V |
| Ambient Operating Temperature (TA) | -40 to +85 | °C |
| Junction Operating Temperature (TJ) | -40 to +125 | °C |
| Package | VFQFPN 16L (3 x 3 x 0.8 mm) with exposed pad | |
| Static On-Resistance (RON) of Power Switch | 65 mΩ (at TJ = 25 °C) | mΩ |
| Adjustable Current Limit | Up to 2.8 A | A |
| Thermal Shutdown Threshold | 150 °C | °C |
| Undervoltage Lockout (VUVLO) | 3.9 to 4.3 V | V |
Key Features
- Compliant with USB charging specifications BC1.2, USB 2.0, and USB 3.0 standards
- Compliant with Chinese telecommunications industry standard YD/T 1591-2009
- Compatible with proprietary charging modes (Apple, BlackBerry, Korean tablets)
- Wide bandwidth, low-loss USB 2.0 data switch
- Integrated VBUS power switch with low RON of 65 mΩ
- Constant current mode overcurrent protection
- Soft-start to limit inrush current
- Adjustable current limit up to 2.8 A
- Short-circuit, thermal, and undervoltage protection
- Reverse voltage and reverse current protection
- Deglitched fault reporting output
- Supports remote wakeup in S3 states
- Charging indication output in DCP and CDP modes
Applications
- USB ports and hubs
- Personal computers and all-in-one PCs
- Monitors
- Notebooks and ultrabooks
- Industrial applications
Q & A
- What are the main functions of the STCC2540IQTR?
The STCC2540IQTR integrates a USB charger controller, a wide bandwidth data switch, and a high current power switch.
- Which USB charging standards does the STCC2540IQTR comply with?
The device complies with USB charging specifications BC1.2, USB 2.0, and USB 3.0 standards.
- What proprietary charging modes is the STCC2540IQTR compatible with?
It is compatible with Apple, BlackBerry, and Korean tablet proprietary charging modes.
- What is the static on-resistance (RON) of the power switch?
The static on-resistance (RON) of the power switch is 65 mΩ at 25 °C.
- What are the thermal protection features of the STCC2540IQTR?
The device has an internal thermal sensing circuit that disables the power switch if the die temperature exceeds 150 °C and turns it on once the temperature cools down by 20 °C.
- How does the STCC2540IQTR handle overcurrent conditions?
The device responds to overcurrent conditions by momentarily disabling the internal current limit MOSFET and then recovering to limit the output current until the overload condition is removed.
- What is the purpose of the deglitched fault reporting output?
The deglitched fault reporting output is asserted when overcurrent, overtemperature, or reverse voltage conditions are detected, providing a stable fault signal.
- Can the STCC2540IQTR support remote wakeup in S3 states?
Yes, the device supports remote wakeup in S3 states.
- What is the operating temperature range of the STCC2540IQTR?
The operating temperature range is from -40 °C to +85 °C.
- Is the STCC2540IQTR RoHS compliant?
Yes, the device is RoHS compliant and comes in an Ecopack3 package.
