NZQA registered unit standard
8211 version 4
Page 1 of 3
Title
Demonstrate and apply knowledge of switching power supplies
Level
4
Purpose
Credits
4
This unit standard covers the theory and application of
switched mode and self-oscillating power supplies for
electronics technicians.
People credited with this unit standard are able to demonstrate:
–
knowledge of switching power supplies; and
–
apply knowledge of switching power supplies.
Classification
Electronic Engineering > Core Electronics
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Unit 10933, Demonstrate knowledge of electrical theory for
Electrical Service Technicians - A; Unit 10934, Demonstrate
knowledge of safety, protection, and testing for Electrical
Service Technicians - A; Unit 10935, Demonstrate knowledge
of regulations and codes of practice for Electrical Service
Technicians - A; and Unit 10936, Demonstrate practical skills
required for Electrical Service Technicians - A; or demonstrate
equivalent knowledge and skills.
Explanatory notes
1
This unit standard has been developed for learning and assessment off-job.
2
References
Electricity Act 1992;
Electricity (Safety) Regulations 2010;
Health and Safety in Employment Act 1992 and associated regulations;
and all subsequent amendments and replacements.
3
Definitions
d.c. – direct current.
Enterprise practice – those practices and procedures that have been promulgated by
the company or enterprise for use by their employees.
Industry practice – those practices that competent practitioners within the industry
recognise as current industry best practice.
SMPS – switched mode power supply.
SOPS – self oscillating power supply.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
4
8211 version 4
Page 2 of 3
Range
a Electrical, radiation, and workshop or laboratory safety practices are to be
observed at all times.
b All activities and evidence presented for all outcomes and evidence requirements
in this unit standard must be in accordance with legislation, policies, procedures,
ethical codes, Standards, applicable site and enterprise practice, and industry
practice; and, where appropriate, manufacturers’ instructions, specifications, and
data sheets.
c Evidence for the number and type of equipment chosen are left to the discretion of
the assessor, but must be sufficient to assess competence in all outcomes of the
unit standard.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of switching power supplies.
Range
SMPS, SOPS.
Evidence requirements
1.1
Labelled block diagrams are drawn from memory, and waveforms at each block
shown.
1.2
The operation of individual circuit blocks are explained with reference to circuit
diagrams.
1.3
The differences between SMPS and SOPS, and between primary and
secondary switching are outlined.
1.4
Switching power supply terminology is explained with reference to diagrams
where applicable.
Range
terminology – buck converter, boost converter, flyback converter,
forward converter, hot and cold chassis, over-voltage and current
protection, short circuit protection, pulse width modulation.
Outcome 2
Demonstrate and apply knowledge of switching power supplies.
Evidence requirements
2.1
Waveforms and d.c. voltages are measured at points specified by the
manufacturer.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2.2
8211 version 4
Page 3 of 3
The characteristics of switching power supplies are compared with those of
linear supplies.
characteristics – regulation, efficiency, cost, physical size, radio
frequency interference, circuit complexity.
Range
Planned review date
31 December 2016
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
29 October 1996
31 December 2011
Revision
2
3 April 2001
31 December 2011
Review
3
26 July 2004
31 December 2012
Review
4
21 July 2011
N/A
Consent and Moderation Requirements (CMR) reference
0003
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMRs). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact the ElectroTechnology Industry Training Organisation
reviewcomments@etito.co.nz if you wish to suggest changes to the content of this unit
standard.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016