Alpha and Omega Semiconductor Introduces an Ideal Diode Protection Switch with Limited Power Source (LPS) Feature as a Safeguard for Multiport USB-C Applications
The advanced LPS feature of the AOZ1390DI significantly mitigates the risks in hazardous conditions
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The advanced LPS feature of the AOZ1390DI significantly mitigates the risks in hazardous conditions (Photo: Business Wire)
Designed to enhance USB Type-C efficiency and safety, the AOZ1390DI features Limited Power Source (LPS) functionality. For multi-port ORing or parallel power applications, the LPSB pin of the AOZ1390DI can be connected to the DISB pin of one or more AOZ1390DI devices at other ports. This LPS feature works as a watchdog, disabling the port when another port in the same system is faulty or damaged. In doing so it prevents excessive power flow through the device from other faulty or damaged ports, making the AOZ1390 ideal for multi-port Type-C Power Delivery (PD) applications.
The new device has advanced features that substantially reduce voltage drop and power loss compared to a discrete implementation. The AOZ1390DI offers an Ideal Diode True Reverse Current Blocking (IDTRCB) protection, which prevents the undesired reverse current from VOUT to VIN. Furthermore, the integrated back-to-back MOSFET delivers the industry’s lowest ON resistance and highest SOA to safely handle high currents and a wide range of output capacitances on VOUT. The input operating voltage range of the AOZ1390DI is between 3.3V and 23V, and both VIN and VOUT terminals are rated at 30V Absolute Maximum with the capability to support up to 8A switch current. An internal soft-start circuit controls inrush current from high capacitive loads, and an external capacitor can adjust the slew rate. In addition, it has a wealth of protection features, including Input Under-Voltage
“With our AOZ1390DI ideal diode protection switches, designers can implement simple, efficient, and safe USB Type-C PD3.0
AOZ1390DI comes in two variants: AOZ1390DI-01 will automatically restart once fault conditions are cleared, whereas AOZ1390DI-02 will latch the power switch off, and the EN or power must be reset to restart the device.
Technical Highlights
- 18 mΩ typical ON resistance
- 3.3 V to 23 V operating input voltage, VIN, and VOUT rated at 30 V abs max.
- Ideal Diode True Reverse Current Blocking (IDTRCB)
- Fast recovery from reverse current condition
- Supports Limited Power Source (LPS)
- Programmable soft-start, Short Circuit Protection (SCP), VIN discharge
- VIN Under-Voltage Lockout (UVLO), VIN Over-Voltage Protection (OVP), Thermal Shutdown Protection (TSD)
- IEC61000-4-5: 55 V on VIN, no capacitor
- Thermally enhanced DFN3.5x3-14L package
Pricing and Availability
The AOZ1390DI-01 and AOZ1390DI-02 are immediately available in production quantities with a standard lead time of 12 weeks. The unit price in 1,000-piece quantities is
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