Common use of Power Supply Noise Susceptibility Clause in Contracts

Power Supply Noise Susceptibility. A host system will supply stable power to the module and guarantee that noise & ripple on the power supply does not exceed that defined in the table. A possible example of a power supply filtering circuit that might be used on the host system is a PI C-L-C filter. A module will meet all electrical requirements and remain fully operational in the presence of noise on the 3.3V power supply which is less than that defined in the table 4-1. The component values of power supply noise filtering circuit, such as the capacitor and inductor, must be selected such that maximum Inrush and Turn-off current does not cause voltage transients which exceed the absolute maximum power supply voltage, all specified in Table 4-1. Parameters Symbol Min Typ. Max Unit Class 2 - - 6 Class 3 - - 9 Class 4 - - 12 Class 5 - - 15 Class 6 - - 18 Low Power Mode Dissipation Plow - - 2 W Class 3 and 4 ICC - - 3.75 A Class 5 and 6 ICC - - 5.625 A Inrush Current5 Class 1 and 2 I-inrush - - 100 mA/usec Turn-off Current I-turnoff -100 - - mA/usec Inrush Current4 Class 3 and 4 I-inrush - - 200 mA/usec Turn-off Current I-turnoff -200 - - mA/usec Inrush Current4 Class 5 and 6 I-inrush - - 250 mA/usec 4 Maximum current per pin shall not exceed 500mA. Those power classes for which the maximum current per pin exceeds 500mA will require agreement from an electrical connecter supplier.

Power Supply Noise Susceptibility. A host system will supply stable power to the module and guarantee that noise & ripple on the power supply does not exceed that defined in the tableTable 4-1. A possible example of a power supply filtering circuit that might be used on the host system is a PI C-L-C filter. A module will meet all electrical requirements and remain fully operational in the presence of noise on the 3.3V power supply which is less than that defined in the table 4-1. The component values of power supply noise filtering circuit, such as the capacitor and inductor, must be selected such that maximum Inrush and Turn-off current does not cause voltage transients which exceed the absolute maximum power supply voltage, all specified in Table 4-1. Parameters Symbol Min Typ. Max Unit Class 2 - - 6 3 Class 3 - - 9 4.5 Class 4 - - 12 6 Class 5 - - 15 7.5 Class 6 - - 18 9 Low Power Mode Dissipation Plow - - 1 W Operating Power Supply Current1 Class 1 and 2 W ICC - - 0.93 A Class 3 and 4 ICC - - 3.75 A 1.87 Class 5 and 6 ICC - - 5.625 A 2.81 Inrush Current5 Current2 Class 1 1, 2, 3 and 2 4 I-inrush - - 100 mA/usec Turn-off Current I-turnoff -100 - - mA/usec Inrush Current4 Current2 Class 3 5 and 4 6 I-inrush - - 200 mA/usec Turn-off Current I-turnoff -200 - - mA/usec Inrush Current4 Class 5 and 6 I-inrush Power Supply Noise Vrip - - 250 mA/usec 4 2% 3% DC – 1MHz 1 – 10MHz 1 Maximum current per pin shall not exceed 500mA. Those power classes for which the maximum current per pin exceeds 500mA will require agreement from an electrical connecter connector supplier.