CEC approves proposed amendments to BCS efficiency requirements

The California Energy Commission has finalised its efficiency specifications for Battery Charging Systems.  Key items include:

• Efficiency requirements for a typical mobile device BCS are twofold: 24hr charge and maintenance energy must not exceed (12 + 1.6E_b) Wh, and the sum of maintenance mode and no-battery mode power must not exceed (1 + 0.0021E_b) W, where E_b = Battery capacity in Wh;
• adoption of the DoE test method, approved in June 2011, for BCS with rated input power ≤ 2 kW; and
• confirmation that consumer products must comply by Feb 2013, whereas larger capacity ≥ 20 Wh systems have until Jan 2014 for compliance.

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Categories / Cordless phones / Efficiency / Media tablets / Mobile phones / No-load power / Power factor / Standby /

ETSI publishes final draft EN 301 489-34 V1.3.1

ETSI has published a final draft of MoU standard EN 301 489-34 V1.3.1 for EMC in common mobile phone chargers as defined in EN 62684:2010.  The proposed revisions, due for approval in May 2012, include:

• references to Annex II being replaced by EN 62684;
• output ripple is no longer measured during continuous immunity tests, only V_OUT = 5 V ± 5% over the load range is tested;
• and emissions and immunity tests now refer to EN 301 489-1, rather than directly to EN 55022, EN 55016 or IEC 61000-x-y.  This change specifies new testing limits for radiated emissions to 6 GHz (whereas EN 55022 specifies limits to 1 GHz).

Click to register and download V1.3.1 or contact CamSemi for more information.

Categories / EMI / Mobile phones /

EC publishes MoU Annex III Guide on Implementation

The European Commission has published MoU Annex III providing guidance on how initial common mobile phone chargers should comply with the MoU requirements. The recommendations relate to the two standards developed by CENELEC and ETSI: IEC 62684 and EN 301 489-34. In addition to several clarifications, Annex III includes the following:

• a revised Common Mode Noise (CMN) test method requiring measurement of all pulses longer than 250 ns (ie with frequencies < 4 MHz);
• a CMN limit ≤ 2 Vp-p; and
• a recommendation that output ripple measurement during immunity testing is ‘not critical’. This is in line with ETSI’s published final draft V1.3.1 of EN 301 489-34, due for approval in May 2012.

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Categories / EMI / Mobile phones /

Energy Star publishes new lamps specification version 1.0

Energy Star has now published version 1.0 of a new standard to replace both ‘CFLs’ and ‘Integral LED Lamps’. Key points for LED drivers include:

• power factor > 0.7 for P_IN > 5 W; lamps with P_IN ≤ 5 W are PF-exempt;
• efficacy ≥ 55 lm/W for P_IN < 10 W and efficacy ≥ 60 lm/W for P_IN ≥ 10 W;
• lamp lifetime ≥ 10,000 hrs and warranty ≥ 2 years, based on usage of ≥ 3 hours per day.

A definition, method of measurement and compatibility metric for dimmable lamps are also all in development.

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Categories / Lighting / Power factor /

USB IF publishes BC1.2 compliance plan

The USB Implementers Forum has published its Battery Charging 1.2 Compliance Plan to provide test sequences for many mobile phone and other chargers rated at 5 V.

Click to download the full specification/compliance plan/other documents or contact CamSemi for more information.

Categories / Mobile phones /