USB-C PD3.0 sink controllers for charging designs
Diodes Incorporated has launched two high-performance USB-C PD3.0 sink controllers for home appliances and cordless power tools.
The AP33771 and AP33772 sink controllers enable the appropriate voltage level to be negotiated via USB-C. They have an operating voltage range of 3.3V to 24V.
The AP33771’s simple pin-driven setting of required voltages and power makes it easier to use, while the AP33772 provides greater flexibility for more sophisticated designs that use a microcontroller with an I²C interface.
Both devices have built-in application firmware, which automatically carries out the PD3.0 negotiation procedure with the attached USB PD3.0 compliant charger in order to obtain the required power level. LED lighting (driven by one of their GPIOs) enables a clear indication of the charging state and potential fault situation.
The AP33771 has a preloaded power menu, consisting of eight different output voltages and 10 different power levels. The power requirements of the end equipment can be met via alteration of simple resistor settings. It also provides 5V charging when connected to a classical USB Type-A charger, as well as supporting USB Type-C to USB Type-C cable voltage drop compensation.
The I²C interface on the AP33772 allows more sophisticated system designs to be addressed. Through it, particular power profiles can be specified, as well as enabling access to various protection features.