LNK500P-TL POWERINT [Power Integrations, Inc.], LNK500P-TL Datasheet

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LNK500P-TL

Manufacturer Part Number
LNK500P-TL
Description
Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers
Manufacturer
POWERINT [Power Integrations, Inc.]
Datasheet
LNK500
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)
• Extremely simple circuit configuration
• Up to 75% lighter power supply reduces shipping cost
• Primary based CV/CC solution eliminates 10 to 20
• Combined primary clamp, feedback, IC supply, and loop
• Fully integrated auto-restart for short circuit and open
• 42 kHz operation simplifies EMI filter design
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 - 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
• Home appliances, white goods and consumer electronics
• 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. LNK500
is a lower cost version of the LNK501 with a wider tolerance
output CC characteristic. LinkSwitch introduces a revolutionary
patented topology for the design of low power switching power
supplies that rivals the simplicity and low cost of linear adapters,
or constant voltage/constant current (CV/CC) solution
secondary components for low system cost
compensation functions–minimizes external components
loop fault protection–saves external component costs
enclosure size significantly
additional clamp capacitor
cameras, MP3/portable audio devices, shavers, etc.
®
Product Highlights
®
Family
Figure 1. Typical Application – not a Simplified Circuit (a) and
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 – see Key Application Considerations section.
4. See Part Ordering Information.
and enables a much smaller, lighter, and attractive package when
compared with the traditional "brick". 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
*Estimated tolerance achievable in high volume production
**See Optional Secondary Feedback section.
LNK500
including transformer and other component tolerances.
P or G
HV DC Input
Wide Range
Example Characteristic
Output Characteristic Tolerance Envelopes (b).
Shown Above
For Circuit
(CV only)
OUTPUT POWER TABLE
4
Min
LinkSwitch
±25%*
230 VAC
D
3.2 W
4.3 W 5.5 W 2.9 W 3.5 W <500 mW
Min
C
2
(CV/CC)
Typ
S
±10%
Typ
±
4 W 2.4 W
15%
I
O
2
(a)
(b)
V
Min
O
85-265 VAC
Secondary Feedback**
2
±5%
With Optional
Typ
3 W
2
±25%*
1
PI-3415-021103
<300 mW
March 2003
No-Load
Output
Power
Input
(V
DC
O
)
®
I
O
3

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LNK500P-TL Summary of contents

Page 1

LNK500 LinkSwitch Energy Efficient CV/CC Switcher for Very Low Cost Adapters and Chargers Product Highlights Cost Effective Linear/RCC Replacement • Lowest cost and component count, constant voltage (CV) or constant voltage/constant current (CV/CC) solution • Extremely simple circuit ...

Page 2

LNK500 CONTROL SHUNT REGULATOR/ ERROR AMPLIFIER - 5 OSCILLATOR D MAX CLOCK SAW I DCS R E Figure 2. Block Diagram. Pin Functional Description DRAIN (D) Pin: Power MOSFET drain connection. Provides ...

Page 3

LinkSwitch Functional Description The duty cycle, current limit and operating frequency relationships with CONTROL pin current are shown in Figure 4. Figure 5 shows a typical power supply outline schematic which is used below to describe the LinkSwitch operation. Power ...

Page 4

LNK500 The characteristics described above provide an approximate CV/CC power supply output without the need for secondary side voltage or current feedback. The output voltage regulation is influenced by how well the voltage across C2 tracks the reflected output voltage. ...

Page 5

D1, it would become a switching node, generating additional common mode EMI currents through its internal parasitic capacitance. The feedback configuration in Figure 6 is simply a resistive divider made ...

Page 6

LNK500 However, in laboratory bench tests often more convenient to test the power supply output characteristic starting from a low output current and gradually increasing the load. In this case, the optocoupler feedback regulates the output voltage until ...

Page 7

BR1 RF1 1 A, 600 V 10 Ω Fusible 4.7 µF 85-265 VAC 400 V Figure 9. 2.75 W Constant Voltage/Constant Current (CV/CC) Charger using LinkSwitch ...

Page 8

LNK500 To aid the designer, the power table reflects these differences. For CV/CC designs the typical power column and for CV designs the minimum power column should be used, respectively. Additionally, figures are based on the following conditions: 1. The ...

Page 9

This includes device and transformer tolerances and line variation. Lower power designs may have poorer constant current linearity. As the output load reduces from the peak power ...

Page 10

LNK500 Quick Design Checklist As with any power supply design, all LinkSwitch designs should be verified on the bench to make sure that component specifications are not exceeded under worst case conditions. Note LinkSwitch circuit, the SOURCE is ...

Page 11

DRAIN Voltage ........................................ -0 700 V DRAIN Peak Current ............................................. 400 mA CONTROL Voltage ..................................... - 0 CONTROL Current (not to exceed 9 V) ................100 mA Storage Temperature ................................-65 °C to 150 °C ...........-40 ...

Page 12

LNK500 Parameter Symbol SHUTDOWN/AUTO-RESTART CONTROL Pin I Charging Current C(CH) I Control/Supply/ CD1 Discharge Current I CD2 Auto-restart V Threshold Voltage C(AR) Auto-restart V Hysteresis Voltage C(AR)hyst Auto-restart DC Duty Cycle (AR) Auto-restart f Frequency (AR) CIRCUIT PROTECTION Self-protection I ...

Page 13

Parameter Symbol OUTPUT ON-State R Resistance DS(ON) OFF-State Drain I Leakage Current DSS Breakdown BV Voltage DSS DRAIN Supply Voltage NOTES: A. For specifications with negative values, a negative temperature coefficient corresponds to an increase in magnitude with increasing temperature, ...

Page 14

LNK500 Figure 12. LinkSwitch General Test Circuit 5. 1.6 1.2 0.8 0 DRAIN Voltage (V) Figure 13. I vs. DRAIN Voltage. C 120 100 ...

Page 15

Typical Performance Characteristics 1.1 1.0 0.9 -50 - 100 125 150 Junction Temperature (°C) Figure 17. Breakdown Voltage vs. Temperature. 1.200 1.000 0.800 0.600 0.400 0.200 0.000 -50 - 100 125 150 ...

Page 16

LNK500 Typical Performance Characteristics (cont 3/03 300 =25 °C T CASE =100 °C T 250 CASE 200 150 100 Drain Voltage (V) Figure 23. Output Characteristics (DRAIN Current vs. DRAIN Voltage. ...

Page 17

PART ORDERING INFORMATION LNK 500 ⊕ .004 (.10) -E- .240 (6.10) .260 (6.60) Pin 1 .367 (9.32) -D- .387 (9.83) .125 (3.18) .145 (3.68) -T- SEATING PLANE .100 (2.54) BSC .048 (1.22) .065 (1.65) .014 ...

Page 18

LNK500 ⊕ .004 (.10) -E- .240 (6.10) .260 (6.60) Pin 1 .100 (2.54) (BSC) .367 (9.32) -D- .387 (9.83) .125 (3.18) .145 (3.68) .032 (.81) .048 (1.22) .037 (.94) .065 (1.65 3/03 SMD-8B .372 (9.45) .388 ...

Page 19

LNK500 B 19 3/03 ...

Page 20

LNK500 Revision Notes B 1) Final release data sheet For the latest updates, visit our Web site: www.powerint.com PATENT INFORMATION Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power ...

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