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LNK501 Datasheet(PDF) 1 Page - Power Integrations, Inc.

Part No. LNK501
Description  Energy Efficient, CV/CC Switcher for Very Low Cost Chargers and Adapters
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Maker  POWERINT [Power Integrations, Inc.]
Homepage  http://www.powerint.com
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LNK501 Datasheet(HTML) 1 Page - Power Integrations, Inc.

 
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Figure 1. Typical Application – not a Simplified Circuit (a) and
Output Characteristic Tolerance Envelopes (b).
Product Highlights
Cost Effective Linear/RCC Replacement
• Lowest cost, component count, constant voltage, constant
current (CV/CC) solution
• Extremely simple circuit configuration
• Up to 75% lighter power supply reduces shipping cost
• Primary based CV/CC solution eliminates 10 to 20
secondary components for low system cost
• Combined primary clamp, feedback, IC supply, and loop
compensation functions–minimizes external components
• Fully integrated auto-restart for short circuit and open
loop fault protection–saves external component costs
• 42 kHz operation simplifies EMI filter design
•3 W output with EE13 core for low cost and small size
Much Higher Performance Over Linear/RCC
• Universal input range allows worldwide operation
• Up to 70% reduction in power dissipation–reduces
enclosure size significantly
• CV/CC output characteristic without secondary feedback
• System level thermal and current limit protection
•Meets all single point failure requirements with only one
additional clamp capacitor
• Controlled current in CC region provides inherent soft-start
• Optional opto feedback improves output voltage accuracy
EcoSmart - Extremely Energy Efficient
• Consumes <300 mW at 265 VAC input with no load
•Meets Blue Angel, Energy Star, and EC requirements
• No current sense resistors–maximizes efficiency
Applications
• Linear transformer replacement in all
≤ 3 W applications
• Chargers for cell phones, cordless phones, PDAs, digital
cameras, MP3/portable audio devices, shavers, etc.
• Home appliances, white goods and consumer electronics
• TV standby and other auxilliary supplies
Description
LinkSwitchisspecificallydesignedtoreplacealllineartransformer/
RCC chargers and adapters in the
≤ 3 W universal range at equal
or lower system cost with much higher performance and energy
efficiency. LinkSwitch introduces a revolutionary topology for the
design of low power switching power supplies that rivals the
simplicity and low cost of linear adapters, and enables a much
PRODUCT2
OUTPUT POWER TABLE1
Table 1. Notes: 1. Typical output power for a design achieving
<300 mW no load consumption in an enclosed adapter measured at
50
°C ambient. Higher reflected voltage will extend power capability
with increased no load consumption. See Key Application
Considerations. 2. See Part Ordering Information.
230 VAC
±15%
85-265 VAC
September 2002
LNK501 P or G
4 W
3 W
smaller, lighter, and attractive package when compared with the
traditional "brick". With efficiency of up to 75% at 3 W output and
< 300 mW no-load consumption, a LinkSwitch solution can save
the end user enough energy over a linear design to completely
pay for the power supply cost in less than one year. LinkSwitch
integrates a 700 V power MOSFET, PWM control, high voltage
start-up, current limit, and thermal shutdown circuitry, onto a
monolithic IC.
LNK501
LinkSwitchFamily
Energy Efficient, CV/CC Switcher for
Very Low Cost Chargers and Adapters
®
®
PI-2776-091302
Wide Range
HV DC Input
DC
Output
(V
O)
(a)
(b)
For Circuit
Shown Above
With Optional
Secondary Feedback**
*Estimated tolerance achievable in high volume production
including transformer and other component tolerances.
**See Optional Secondary Feedback section.
LinkSwitch
V
O
I
O
±10%
±20%*
V
O
I
O
±5%
±20%*
DS
C


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