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- 2-Cell 1W LED Drive Module
- For 1W, 5mm LEDs - No. 2009A
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Additional Applications
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| Printer Friendly Version (pdf) |
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| The LEDdynamics 2009 LED Driver Module is an inexpensive device originally designed to efficiently and safely drive a one Watt Luxeon*1 emitter from one or two batteries. However, the 2009's elegantly simple design allows a great deal of flexibility in application. This document will illustrate a number of possible alternate configurations, including the ability to drive newly released, high-power emitters such as Nichia's Jupiter* and the "Golden Dragon" from Osram, in addition to a review of the standard Luxeon connection. |
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Inside this Application Note |
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* Luxeon is a registered trademark of LumiLEDs Corp. Sirius and Jupiter are registered trademarks of Nichia Corp. "Golden Dragon" is a registered trade symbol of OSRAM Opto Semiconductor GmbH. |
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©2004 LEDdynamics, Inc - All Rights Reserved |
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Doc. No. COM-DRV-2009-APP Rev 00 |
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2009 as a Boost Driver |
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Printer Friendly Version (pdf) |
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(additional boost drives) |
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NOTE:
LED(s) must
always be
connected
whenever
power is
applied!
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Figure 1. 2009 in its standard boost configuration driving a single junction InGaN(P), one Watt or greater.
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- Applicable LED configurations
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| 15 |
Parallel 5mm LEDs @ 200mA ea. |
| 1 |
1W LuxeonTM LED (more) |
| 1 |
1W ISP High-Power LED (more) |
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| Specification |
Min
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Max
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| Input Voltage |
1
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3
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| Output Voltage |
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8
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| LED Current |
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500mA
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| Efficiency |
- 70%
- @1v
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- 85%
- @2.5v
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- Suggested battery configurations
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| 1 or 2 cell flashlights/other portable lighting |
| Point of load conversions |
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- Figure 2. The 2009 driving 1W (thin line) and 3W
- (thick line) Luxeon emitters.
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- Figure 3. The 2009 driving 1W (thin line) and 3W
- (thick line) Luxeon emitters.
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Printer Friendly Version (pdf) |
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2009 as a Buck Driver
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- Applicable LED configurations
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| 15 |
Parallel 5mm LEDs @ 20mA ea. |
| 24 |
Series/Parallel 2V LEDs @ 30mA ea. |
| 1 |
1 W LuxeonTM LED (more) |
| 1 |
1W ISP High-Power LED (more) |
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- Suggested battery configurations
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| 4 or 5 |
Alkaline cells (more) |
| 4 |
NiHM, or NiCad cell(s) |
| 2 |
Lithium 3V or 3.6V cell (more) |
| 1 |
6V Lantern battery |
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Figure 4. The 2009 configured as a buck converter. The load must be floating for this buck topology. The 2009 will not function with less than ~3.7 volts(LED Vf + 0.7) in this configuration.
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| 3 to 5 cell flashlights |
| 4 to 8 volt embedded bulb drivers |
| portable lighting |
| low voltage accent lighting |
| PC accent lighting ( 5V) |
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| Specification |
Min
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Max
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| Input Voltage |
3.7
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8
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| LED Current |
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500mA |
| Efficiency |
- 82%
- @7v
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- 90%
- @4v
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NOTE:
LED(s) must
always be
connected
whenever
power is
applied!
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Figure 5. Operation is possible all the way up to 8 volts but the current quickly rises. Ideal 1 W operation at 6V, perfect for a four cell flashlight.
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Figure 6. This figure demonstrates the inherent efficiency of a driver in buck mode. This topology is 12% more efficient than the standard boost mode.
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2009 as a Buck/Boost Driver
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Printer Friendly Version (pdf) |
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(additional buck/boost drive) |
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- Applicable LED configurations
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| 15 |
Parallel 5mm LEDs @ 20mA ea. |
| 1 |
1 W LuxeonTM LED (more) |
| 1 |
2 W Nichia JupiterTM (more) |
| 1 |
1 W ISP High-Power LED (more) |
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- Suggested battery configurations
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| 1 to 4 |
Alkaline cells (more) |
| 2 |
Lithium 3V or 3.6V cell (more) |
| 1 |
6V Lantern battery |
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Figure 7. 2009 configured in a novel buck/boost configuration. This topology boasts an extremely wide input voltage range that will continue to supply effective power as batteries become exhausted, but is 15% less efficient than boost.
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| 1 to 5 cell flashlights |
| 6 volt embedded bulb drivers |
| low voltage accent lighting |
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portable lighting where complete battery
exhausting is desired
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| Specification |
Min
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Max
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| Input Voltage |
1
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7
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| Output Voltage |
-
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10
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| LED Current |
-
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300mA
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| Efficiency |
- 65%
- @6v
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- 72%
- @2v
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NOTE:
LED(s) must
always be
connected
whenever
power is
applied!
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Figure 8. This circuit delivers substantial LED current from the maximum input of 7 volts all the way down to 1.5 volts!
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Figure 9. Efficiency is lower with this configuration that with buck or boost alone.
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Two 2009s in Parallel, Boost |
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Printer Friendly Version (pdf) |
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(other boost drives) |
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- Applicable LED configurations
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| 1 |
5 W Luxeon VTM |
| 1 |
3 W Luxeon IIITM (more) |
| 1 |
3 W Nichia SiriusTM (more) |
| 1 |
2 W Nichia JupiterTM |
| 2-4 |
1 W LuxeonTM LED (more) |
| 2-4 |
1 W ISP High-Power LED (more) |
| 30 |
Parallel 5mm LEDs @ 20mA ea. |
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- Suggested battery configurations
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Figure 10. Two 2009s can be paralleled to nearly double LED current for a high-power emitter such as Luxeon III or V.
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1-3 W
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5 W
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| 1-2 |
2-4 |
Alkaline cells (more) |
| 1 |
2 |
Lithium 3V cell(s) (more) |
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| Dual CR 123 cell flashlight with Lux V emitter |
| Single CR 123 cell flashlight with Lux III emitter |
| 1-4 cell flashlights |
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| Specification |
Min
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Max
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| Input Voltage |
1
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3
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| Output Voltage |
-
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10
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| LED Current |
-
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800mA
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| Efficiency |
- 72%
- 3W@1v
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- 78%
- 3W@3v
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NOTE:
LED(s) must
always be
connected
whenever
power is
applied!
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Figure 11. Two 2009s driving a Lux III and Lux V. A single 2009 driving a Lux III is included for reference.
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Figure 12. Two 2009s driving a Luxeon III emitter.
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Two 2009s in Parallel, Buck/Boost |
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Printer Friendly Version (pdf) |
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(other buck/boost drives) |
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- Applicable LED configurations
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| 1 |
3 W Luxeon IIITM |
| 2 |
2 W Nichia JupiterTM |
| 1 |
3 W Nichia SiriusTM |
| 2 |
1 W LuxeonTM LED |
| 2 |
1 W ISP High-Power LED |
| 30 |
Parallel 5mm LEDs @ 20mA ea. |
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- Suggested battery configurations
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| 1 to 4 |
Alkaline cells |
| 2 |
Lithium 3V or 3.6V cell |
| 1 |
6V Lantern battery |
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Figure 13. Two 2009s running buck/boost can be paralleled to nearly double LED current for a high-power emitter such as Luxeon III or Nichia Jupiter emitters. The second 2009 can be connected by a switch to provide extra power only when necessary.
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| 1 to 5 cell flashlights |
| 6 volt embedded bulb drivers |
| low voltage accent lighting |
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high power portable lighting
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NOTE:
LED(s) must
always be
connected
whenever
power is
applied!
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| Specification |
Min
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Max
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Specification |
Min
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Max
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| Input Voltage |
1
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7
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LED Current |
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700mA |
| Output Voltage |
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10
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Efficiency |
- 65%
- @7v
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- 72%
- @2v
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Figure 14. Two 2009s in parallel buck/boost running a Lux III.
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Figure 15. Two 2009s in parallel buck/boost running a Lux III.
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| ©2004 LEDdynamics, Inc - All Rights Reserved |
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Doc. No. COM-DRV-2009-APP Rev 00
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