LNK520GNTL Power Integrations, LNK520GNTL Datasheet
LNK520GNTL
Manufacturer Part Number
LNK520GNTL
Description
SOP-7
Manufacturer
Power Integrations
Specifications of LNK520GNTL
Date_code
08+
LNK520
LinkSwitch
Energy Efficient, CV or CV/CC Switcher for
Very Low Cost Adapters and Chargers
Cost Effective Linear/RCC Replacement
• Lowest cost and component count, constant voltage (CV)
• Optimized for bias winding feedback
• Up to 75% lighter power supply reduces shipping cost
• Primary based CV/CC solution eliminates 10 to 20
• Fully integrated auto-restart for short circuit and open
• 42 kHz operation with optimized switching
Much Higher Performance Over Linear/RCC
• Universal input range allows worldwide operation
• Up to 70% reduction in power dissipation – reduces
• CV/CC output characteristic without secondary feedback
• System level thermal and current limit protection
• Meets all single point failure requirements with only one
• Controlled current in CC region provides inherent soft-start
• Optional opto feedback improves output voltage accuracy
EcoSmart
• Consumes <300 mW at 265 VAC input with no load
• Meets California Energy Commission (CEC), Energy
• No current sense resistors – maximizes efficiency
Applications
• Linear transformer replacement in all ≤3 W applications
• Chargers for cell phones, cordless phones, PDAs, digital
• Home appliances, white goods and consumer electronics
• Constant output current LED lighting applications
• TV standby and other auxiliary supplies
Description
LinkSwitch is specifically designed to replace low power linear
transformer/RCC chargers and adapters at equal or lower system
cost with much higher performance and energy efficiency.
LNK520 is equivalent to LNK500 but optimized for use with bias
winding feedback and has improved switching characteristics
for significantly reduced EMI. In addition, if bias and output
windings are magnetically well coupled, output voltage load
or constant voltage/constant current (CV/CC) solutions
secondary components for low system cost
loop fault protection – saves external component costs
characteristics for significantly reduced EMI
enclosure size significantly
additional bias capacitor
Star, and EU requirements
cameras, MP3/portable audio devices, shavers, etc.
®
– Extremely Energy Efficient
Product Highlights
®
Family
Table 1. Notes: 1. Output power for designs in an enclosed adapter
measured at 50 °C ambient. 2. See Figure 1 (b) for Min (CV only
designs) and Typ (CV/CC charger designs) power points identified
on output characteristic. 3. Uses higher reflected voltage transformer
designs for increased power capability
Considerations section. 4. For lead-free package options, see Part
Ordering Information.
Figure 1. (a) Typical Application – not a Simplified Circuit and
regulation can be improved. With efficiency of up to 75% 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 full 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.
PRODUCT
V
O
LNK520
P or G
*Estimated tolerance achievable in high volume production (external
**See Optional Secondary Feedback section.
components with ±7.5% transformer inductance tolerance included).
HV DC Input
Wide Range
Example Characteristic
(b) Output Characteristic Tolerance Envelopes.
Shown Above
For Circuit
(CV only)
LinkSwitch
OUTPUT POWER TABLE
4
Min
±24%*
230 VAC ±15% 85-265 VAC No-Load
3.3 W
4.2 W
Min
2
(CV/CC)
Typ
±10%
5.5 W 2.9 W 3.5 W <500 mW
Typ
D
S
4 W
I
O
C
(a)
2
(b)
V
O
2.4 W 3 W <300 mW
Min
Secondary Feedback**
±5%
–
2
With Optional
see Key Application
Typ
±24%*
2
1
February 2005
PI-3577-080603
PI-3853-030404
+
Output
Power
Input
(V
DC
O
)
I
O
3
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