IEC 62684-2011 pdf download.Interoperability specifications of common external power supply (EPS) for use with data-enabled mobile telephones.
5 EPS specification
5.1 DC plug connector specification
The cable assembly supplied with the EPS shall terminate in a USB Micro-B plug. The cable assembly may be permanently connected to the EPS or may be a detachable cable. In either case, the terminating USB Micro-B plug
— shall meet the USB-lF connector test requirements.
— shall be compliant to the USB Micro-B cables and connectors specification. Rev 1.01 (Micro-USB 1.01) and
— shall be rated to meet all electrical specifications.
An EPS provided with a detachable cable shall be equipped with an USB standard A receptacle to connect to the EPS. The detachable cable assembly, supplied for use with the EPS, shall have Standard A and USB Micro-B plugs and meet the USB-lF cable assembly test requirements for compliant usage of connectors and cables in Micro-USB 1 .01.
The above requirement also applies to cables used as an adaptor, i.e. when the USB Micro-B is connected to the mobile telephone by an adaptor where the mobile telephone does not have a Micro-USB interface.
5.2 AC input characteristic
The EPS shall meet Class II requirements of IEC 60950-1 with a maximum touch current not exceeding 90 pA.
The EPS AC input shall operate over the following range:
— voltage range: the rated input voltage range should be at least 100 V to 230 V;
— frequency: 50 Hz to 60 Hz.
5.3 EnvIronmental specification
The EPS operational environmental range over which the DC output characteristics defined in 5.4 shall be maintained, shall be
— temperature range: 0 °C to +45 °C,
— relative humidity: up to 90 %.
5.4 DC output characterIstic
For EPS with permanently connected cables, the voltage at the USB Micro-B plug of the EPS shall 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 caused
by the detachable cable shall be 125 mV when measured across the power pair pins of the
USB 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 shall be no more than 80 mV peak-to-peak measured at 20 MHz bandwidth using the test method as defined in Clause 6.
The common mode noise at the DC output when measured in accordance with Clause 6 shall be
— 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 1 V peak-to-peak:
b) the peak-to-peak voltage measured in the frequency range of 100 kHz to 400 kHz shall not exceed 200 mV peak-to-peak;
C) the peak-to-peak voltage measured in the frequency range of 400 kHz to 1 MHz shall not exceed 39 mV peak-to-peak;
d) the peak-to-peak voltage measured in the frequency range of 1 MHz to 100 MHz shall not exceed 20 mV peak-to-peak;
e) the occupied bandwidth of the fundamental measured with peak hold shall not exceed ±10 % of the EPS switching frequency;
f) the maximum amount of slew within any 100 ns window is 1,25 V peak-to-peak.IEC 62684 pdf download.