onsemi FUSB3307 USB Power Delivery (PD) Power Source Controller
Integrates multiple sensing, monitoring and control functions
onsemi's FUSB3307 is a highly integrated USB Power Delivery (PD) power source controller which can control a DC-DC port power regulator, or the optocoupler in the secondary side of an AC-DC adapter.
The FUSB3307 implements the Source finite state machines specified in the USB PD 3.0 and USB Type-C® standards, including for Programmable Power Supplies (PPS) . To meet the PPS specification, the controller supports output-voltage control at a minimum of 3.3V and a maximum of 21V.
The FUSB3307 includes constant-voltage and constant current-limit control blocks. Internal DACs provide the required reference voltages.
Protection functions integrated in the FUSB3307 controller include:
- Under-voltage protection
- Over-voltage protection
- Over-current protection
- CC1 and CC2 over-voltage protection up to 26V
- Internal and external over-temperature protection
Using a 10-bit ADC, a circuit based on the onsemi FUSB3307 can monitor output voltage, output current, and internal and external temperature via an NTC resistor.
The chip can drive a single or back-to-back N−channel MOSFETs as a load switch, giving a low-cost circuit design which is easy to implement.
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