Datasheet DLD101 (Diodes) - 7
| Hersteller | Diodes |
| Beschreibung | Linear Mode Current Sink LED Driver |
| Seiten / Seite | 9 / 7 — DLD101. Typical Application Circuit. Ordering Information. Part Number. … |
| Dateiformat / Größe | PDF / 158 Kb |
| Dokumentensprache | Englisch |
DLD101. Typical Application Circuit. Ordering Information. Part Number. Case. Packaging. Marking Information. YYW. L101. www.diodes.com
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DLD101 Typical Application Circuit
V Supply CC The DLD101 has been designed primarily for solid state lighting applications, to be used as a current sink circuit solution for LEDs. It LED String features a N-channel MOSFET capable of 1A drive current and a pre- R biased NPN transistor (which allows direct connection to the base, or C via a series base resistor). T 4 3 2 1 Figure 12 shows a typical application circuit diagram for driving an G D LED or string of LEDs. Note that the pre-biased transistor (Q2) has UC C the option of bypassing the series base resistor by connecting directly V to pin 7. The N-MOSFET (Q1) is configured as a VBE referenced DS B current sink and is biased on by RC. The current passed through the Q2 LED string, MOSFET and source resistor, develops a voltage across R2 Q1 RS that provides a bias to the NPN transistor. Consideration of the E R1 expected linear mode power dissipation must be factored into the S Option 3: design, with respect to the DLD101's thermal resistance. 5 6 7 8 V I ≈ BE NEW PROD LED R Option 3 S VDS = VCC – VF LED String – VRS Options 1 & 2: PQ1 = VDS * ILED String Option 2 1.1 V ≈ BE Option 1 I LED R PWM dimming functionality can be effected by either driving the NPN S base via an additional resistor (thereby overriding the feedback from R Option 2: S RS) or by pulling the gate of the MOSFET down by direct connection. Capacitor is across R2 for The PWM control pulse stream can be provided by a micro-controller better noise performance. or simple 555 based circuitry. Fig. 12 Typical Application Circuit for Linear Mode Current Sink LED Driver
Ordering Information
(Note 7)
Part Number Case Packaging
DLD101-7 DFN3030D-8 3000/Tape & Reel Notes: 7. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
DFN3030D-8
W
L101 = Product marking code YYWW = Date code marking
YYW
YY = Last digit of year (ex: 10 for 2010) WW = Week code (01 to 53)
L101
DLD101 7 of 9 April 2010 Document number: DS32007 Rev. 8 - 2
www.diodes.com
© Diodes Incorporated
V Supply CC The DLD101 has been designed primarily for solid state lighting applications, to be used as a current sink circuit solution for LEDs. It LED String features a N-channel MOSFET capable of 1A drive current and a pre- R biased NPN transistor (which allows direct connection to the base, or C via a series base resistor). T 4 3 2 1 Figure 12 shows a typical application circuit diagram for driving an G D LED or string of LEDs. Note that the pre-biased transistor (Q2) has UC C the option of bypassing the series base resistor by connecting directly V to pin 7. The N-MOSFET (Q1) is configured as a VBE referenced DS B current sink and is biased on by RC. The current passed through the Q2 LED string, MOSFET and source resistor, develops a voltage across R2 Q1 RS that provides a bias to the NPN transistor. Consideration of the E R1 expected linear mode power dissipation must be factored into the S Option 3: design, with respect to the DLD101's thermal resistance. 5 6 7 8 V I ≈ BE NEW PROD LED R Option 3 S VDS = VCC – VF LED String – VRS Options 1 & 2: PQ1 = VDS * ILED String Option 2 1.1 V ≈ BE Option 1 I LED R PWM dimming functionality can be effected by either driving the NPN S base via an additional resistor (thereby overriding the feedback from R Option 2: S RS) or by pulling the gate of the MOSFET down by direct connection. Capacitor is across R2 for The PWM control pulse stream can be provided by a micro-controller better noise performance. or simple 555 based circuitry. Fig. 12 Typical Application Circuit for Linear Mode Current Sink LED Driver
Ordering Information
(Note 7)
Part Number Case Packaging
DLD101-7 DFN3030D-8 3000/Tape & Reel Notes: 7. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
DFN3030D-8
W
L101 = Product marking code YYWW = Date code marking
YYW
YY = Last digit of year (ex: 10 for 2010) WW = Week code (01 to 53)
L101
DLD101 7 of 9 April 2010 Document number: DS32007 Rev. 8 - 2
www.diodes.com
© Diodes Incorporated