USB Interface IC for Class A and Class B Quick Charge 3.0 Applications

Figure 1. Typical Application Schematic.

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ECAD Models

CHY103 ECAD Models

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Product Details

CHY103 is a USB interface IC that supports Class A and Class B of the Quick Charge 3.0 specification. It includes features that protect the power supply and its connected Powered Device (PD) from excessive output voltages, secondary-side thermal overload, and faulty power delivery while adapter is unplugged.

The CHY103 interface IC automatically detects whether a connected PD is Quick Charge 3.0 or Quick Charge 2.0 capable before enabling output voltage adjustment. If a PD that is not compliant to Quick Charge 2.0 or 3.0 is detected, the CHY103 disables output voltage adjustment to ensure safe operation with legacy 5 V-only USB PDs.

Product Highlights

    Supports Quick Charge 3.0 specification
    • Class A: 3.6 V to 12 V output voltage
    • Class B: 3.6 V to 20 V output voltage
    Adaptive output overvoltage protection (AOVP)
    • Protects output from exceeding 120% of set output voltage
    Secondary over-temperature protection (SOTP)
    • NTC resistor can be freely positioned inside enclosure
    Output soft short-circuit protection (OSSP)
    • Protects output from delivering power while unplugged
    • Monitoring initiated automatically or remotely through PD
    Remote shutdown protection (RESP)
    • Enables Powered Device to shutdown adapter
    Very low power consumption
    • Below 1 mW at 5 V output
    Fail safe operation
    • Adjacent pin-to-pin short-circuit fault
    • Open-circuit pin fault
    Supports InnoSwitch™, TinySwitch™, and TOPSwitch™


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