IEC 62684-2011 pdf free download – Interoperability specifications of common external power supply (EPS) for use with data-enabled mobile telephones.
For EPS with permanently connected cables, the voltage at the USB Micro-B plug of the EPSshall be 5 v ±0,25 V with no load current to rated output current.
For EPS with detachable cables the voltage at the USB standard A receptacle shall be(5±0,25)V with no load current to rated output current.The maximum voltage drop causedby the detachable cable shall be 125 mV when measured across the power pair pins of theUSB Micro-B plug, while drawing 500 mA from a nominal 5 v source.
The minimum rated output current shall be 500 mA.
The maximum rated output current shall be 1 500 mA.
The maximum output current at any voltage shall not be greater than 1 500 mA.
The ripple voltage on the output with a no load current to maximum rated output current shallbe no ‘more than 80 mV peak-to-peak measured at 20 MHz bandwidth using the test methodas defined in Clause 6.
The common mode noise at the DC output when measured in accordance with Clause 6 shallbe
-AC voltage frequency component: 95 v peak-to-peak maximum,-EPS switching frequency component:
a) the peak-to-peak voltage measured in the frequency range of 1 kHz to 100 kHz shall
not exceed i v peak-to-peak;
b) the peak-to-peak voltage measured in the frequency range of 100 kHz to 400 kHz shallnot exceed 200 mv peak-to-peak;
c) the peak-to-peak voltage measured in the frequency range of 400 kHz to 1 MHz shallnot exceed 39 mv peak-to-peak;
d) the peak-to-peak voltage measured in the frequency range of 1 MHz to 100 MHz shallnot exceed 20 mv peak-to-peak;
e) the occupied bandwidth of the fundamental measured with peak hold shall not exceed士10 % of the EPS switching frequency;
f) the maximum amount of slew within any 100 ns window is 1,25 V peak-to-peak.
NOTE Noise in the FM and TV bands from the EPS should be minimized as it may cause interference to any FMradio and/or TV function of the mobile telephone to which the EPS is connected.At the time of witing, no suitablemethod of measurement has been defined and is the subject of ongoing work.
5.5 Protection
The maximum output voltage under Single Fault Condition shall not exceed 9 v.
The maximum output current under Single Fault Condition shall not exceed 3 A.
The EPS shall not be damaged as a result of either any over-temperature condition of theEPS circuitry components which is not due to a fault of the EPS, or any output short circuitcondition. lf shut down occurs, the unit shall not resume operation until AC power is cycled orthe failure condition causing the shut down has been removed.
5.6EPS detection
To enable the mobile telephone to detect that it is connected to an EPs, the EPS shall meetthe USB-IF charging port test requirements for a dedicated charging port as defined in USB Battery Charging Specification, Revision 1 .1 (BC 1 .1 ), Section 4.1 ‘Charging Port’.
The top level requirements are
– the EPS shall short the D+ and D- lines with a resistance not greater than 200 Ω,
– the resistance between the D+ or D- lines of the EPS and either Vbus or GND shall be greater than 2 MΩ,
– the capacitance between the D+ or D- lines of the EPS and either Vbus or GND shall be less than 1 nF.IEC 62684 pdf download.