SLASEC8B February 2017 – January 2019 PGA460-Q1
The PGA460-Q1 device is designed to operate from an input voltage supply range from 6 V to 28 V. In automotive applications, the PGA460-Q1 device should only be connected directly to a car battery with proper external component-safeguards (D1 and D2) to help protect the device from battery transients and reverse battery currents. If the input supply is located more than a few inches from the PGA460-Q1 device, additional bulk capacitance may be required in addition to the ceramic bypass capacitors.
The electrolytic capacitor at the VPWR pin is intended to act as a fast discharge capacitor during the bursting stage of the PGA460-Q1 device. The center-tap transformer can be supplied with a center-tap voltage that is different than what is supplied to the VPWR pin, but must remain within specified maximum voltage rating of the OUTA and OUTB outputs. No electrolytic capacitor is required for the direct-driven method, although it is recommended for reference voltage stability, and can be less than 100 µF.