3021/3023 BuckPuck TM Wide Range LED Power Module DATA SHEET Page 1 of 8 Product Overview The 3021 and 3023 BuckPuck LED Power Modules are a line of true current regulated drivers for powering LEDs. The BuckPuck line of LED drivers is the ideal choice for powering all types of highbrightness and high-power LED Packages and LED arrays. The line of BuckPuck LED drivers exhibit high efficiency and require no external current limiting resistors or additional heat sinking for operation. A fast response current-sensing circuit makes the 3021 and 3023 ideal for applications where flashing or strobe operation of the LED(s) is required. A wide range of options are available including external dc analog voltage intensity control, TTL/CMOS logic level on/off control ("E" Version), and set-and-forget internal current limiting ("I" Version). The standard units are fully potted in an extremely small form factor* and are provided with a simple 7 pin SIP connection for through-hole PCB mounting (3021) or 6" 24AWG Colored Leads (3023). The 3021 and 3023's built-in regulated 5V reference (E and I versions) can provide output to power logic circuitry or microprocessor, eliminating the need for an additional power supply on the circuit board. Features Typical Applications DC or AC input voltage up to 32V (24VACRMS) 350mA, 500mA, 700mA, or 1.0A constant current output* Extremely small form factor* (0.83"x0.83"x0.43") The 3021 has a simple 7-pin SIP connection for through-hole PCB mounting or use with an optional wiring harness (3021Hx) The 3023 has permanently attached wires External analog/digital intensity control (TTL compatible) Optional external potentiometer intensity control (0-100%) Optional on-board trim adjustment (40-110%) Output short circuit protection up to 15 seconds Output open circuit protection Pulse and strobe capable (control input) Built-in 5V reference/output to power logic circuitry or Processor Solar & Landscape Lighting Architectural Lighting Track Lighting Automotive & Marine Lighting Portable Lighting & Flashlights Point of Purchase Lighting Desk & Reading Lamps Signal & marker Lighting Flashing & Strobe Lighting Cabinet & Display Case Lighting Sign & Channel Letters Much More... Pb 7-Pin SIP through-hole PCB mounting Optional on-board trim adjustment (40-110%) * - Custom units can be designed for OEM applications. Contact LUXdrive for more information. LEDdynamics, Inc. 802.728.4533 P 802.728.3800 F sales@LUXdrive.com www.LUXdrive.com 3021 BuckPuck with optional wiring harness (3021HEP) (c)2013 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com. Specifications subject to change without notice. May, 2013 - Rev 3.1 Made in the USA RoHS C o m p lia n t 2002/95/EC 3021/3023 BuckPuck TM Wide Range LED Power Module DATA SHEET Page 2 of 8 Part Number Identification Table Part Number Table 1 Product Selection DC Input AC Input Control/ Dimming Connection Type no no 7-Pin SIP (4 Pins) On-Board Trim 3021-D-N-xxxx 5-32V no 3021-D-E-xxxx 7-32V no no yes 7-Pin SIP (6 Pins) 3021-D-I-xxxx 7-32V no yes yes 7-Pin SIP (6 Pins) 3023-D-N-xxxx 5-32V no no no 4 Wires 3023-D-E-xxxx 7-32V no no yes 6 Wires 3023-D-E-xxxxP 7-32V no no yes 6 Wires 3021-A-N-xxxx no 7-24VRMS no no 7-Pin SIP (4 Pins) 3021-A-E-xxxx no 7-24VRMS no yes 7-Pin SIP (6 Pins) 3021-A-I-xxxx no 7-24VRMS yes yes 7-Pin SIP (6 Pins) 3023-A-N-xxxx no 7-24VRMS no no 4 Wires XXXX - Output current rating in milliamperes (mA): 350, 500, 700, 1000 or special order factory custom rating Absolute Maximum Ratings Input Voltage, DC Model . . . . . . . . . . . . . . . . . . . . . 32VDC Input Voltage, AC Model . . . . . . . . . . . . . . . . . . . . . 24VRMS Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32VDC Control Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 10V Reference regulator current (5VDC) Output . . . . . . . . 20mA 3021 3023 Typical Characteristics Output tolerance (within specified temp. range) . . . . . . . . . 10% Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95% Input Voltage Minimum . . . . . . . 5VDC (N), 7VDC (E or I), 7VRMS Input Margin (350mA unit1, add to LED Vf MAX). . . . . . . . 2.5VDC, 4VRMS 1 - Margin increases with higher current units. LEDdynamics, Inc. 802.728.4533 P 802.728.3800 F sales@LUXdrive.com www.LUXdrive.com Figure 2. Efficiency vs. Vin Vin Figure 1. Bottom view Pinout of the 3021/3023 BuckPuck Figure 3. Output current vs. control voltage (c)2013 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com. Specifications subject to change without notice. May, 2013 - Rev 3.1 Made in the USA LED + LED Ctrl Ref Vin+ 3021/3023 BuckPuck TM Wide Range LED Power Module DATA SHEET Page 3 of 8 Specifications Output current, 3021-x-x-350, 3023-x-x-350, 350P, 500P, 700P, 1000P. . . . . . . . . . . . . . 350mA1 Output current, 3021-x-x-500, 3023-x-x-500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA1 Output current, 3021-x-x-700, 3023-x-x-700 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700mA1 Output current, 3021-x-x-1000, 3023-x-x-1000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000mA1 Control Pin, adjustment threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.65 V 5% Control Pin, shutoff threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 V 5% Control Pin, propagation delay to output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <15 s Control Pin, input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5k ohm Reference voltage (Vin= 7V or greater) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 VDC 5%2 Optional trim pot adjustment range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40%-110% External pot adjustment range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0%,1-100%2 Maximum flash frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 kHz Minimum strobe pulse width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 s Output rise time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10 s3 Output fall time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <350 s3 Quiescent current (no load or control pin high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <4.5 mA3 Operating temperature (Tcase). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40-+80C Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40-+125C Application Information Description The 3021/3023 Wide Range LED Power Module is a high efficiency dc to dc converter which delivers a fixed output current by varying the output voltage as required to maintain the specified current . A fast response current-sensing circuit permits the unit to be used in applications where flashing or pulsing of the LEDs is required. Several options are available allowing for use with many types of LEDs and in a variety of operating modes Fixed Current Drive The fixed output versions of the 3021/3023 are designed to supply their rated current to one or more LED junctions. For example, a 350 mA rated unit will drive up to six white 350mA LEDs connected in series at 24VDC. Due to the nature of the buck regulator, the input voltage must always be higher than the total forward voltage drop of the LED junction(s) connected in series (2.5V for DC models, 4V for AC models). Thus, for a series string of six junctions having an average forward drop of 3.5V each, the required minimum input voltage will be 23.5VDC. A standard 24VDC power supply is a good choice for this application. Figures 4 through 6 show 700mA and 1000mA rated units driving multiple LEDs. Note that parallel strings of LEDs can be driven directly with no additional circuitry required to ensure current sharing. The nature of the LEDs themselves will provide sufficient current sharing if the parallel strings comprise of 3 or more junctions each. 1 - Measured with single emitter; output current drops slightly with additional series junctions to limit maximum power dissipation. 2 - When Vin > 7VDC 3 - Actual value varies greatly based on input and/or output voltages. Value shown is for Vin = 24VDC VOUTt=20VDC LED load. Actual values will be smaller in most applications. LEDdynamics, Inc. 802.728.4533 P 802.728.3800 F sales@LUXdrive.com www.LUXdrive.com (c)2013 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com. Specifications subject to change without notice. May, 2013 - Rev 3.1 Made in the USA 3021/3023 BuckPuck TM Wide Range LED Power Module DATA SHEET Page 4 of 8 Adjustable Current - On-Board Control - "I" Model Where the ability to adjust the output current to an intermediate value is required, all output current ratings are available with an on-board potentiometer. This permits the output current to be varied from approximately 40% to 110% of the rated value. When measuring the output is required to determine a particular set point, the following method is recommended: Temporarily place a 0.1 ohm, 1% resistor in series with the LEDs. Read the voltage across the 0.1 ohm resistor. The voltage, in millivolts X 10, will equal the output current in mA. Because there is a small, high-frequency component in the 3021/3023 output, many multi-meters may give an incorrect reading when used in the current mode. It has been found that the method described above yields a far more accurate measurement. The potentiometers used for the on-board adjustable units are rated for a limited number of rotations (typically 100) and are intended for "set it and forget it" applications. Where frequent adjustments of output current are needed, the use of units with external adjustment capabilities is recommended. Adjustable Current - External Control - "E" Model Figures 10 and 11 show external adjustment configurations. Both use a 5Kohm, linear taper potentiometer. In Figure 10, the potentiometer is connected between the internal 5VDC reference (Ref) output and the control (Ctrl) input. When using this configuration, it is important that Vin be 7VDC or higher. Figure 11 shows the control potentiometer being powered by an external 5VDC source. When using an external power source for the potentiometer, the source ground must be common to the LED- output pin. In either configuration, connect the potentiometer such that clockwise rotation increases the resistance. Note that, because the current through the potentiometer is less than 5mA, a low power potentiometer may be used. External On/Off Control Where a manual on/off control is desired, the potentiometer in Figures 10 and 11 may be replaced by a pushbutton or toggle switch. The output current will be zero when the switch is closed. Figures 12 and 13 show external dimming control combined with on/off control. The circuit in Figure 13 uses a 2N3906 or equivalent PNP switching transistor. External Pulse/Strobe Control Figures 14 and 15 show two methods for low speed pulsing or high speed flashing operation. In Figure 14, a 5V TTL/CMOS logic signal is applied directly to the control (Ctrl) input of the 3021/3023. The output current will be zero when the control signal is high. Note that the input needs to source a minimum of 4.75VDC into a 1.5Kohm input impedance. Also, as is the case with a dc control signal, the logic input ground should to be common to the LED- output terminal. Figure 15 shows an inverted input configuration using a 2N3906 or other PNP switching transistor. In this case, a logic high will cause the output to be "on". In either configuration, the rise time of the output will be 10sec or less. A pulse frequency up to 10kHz may be used. LEDdynamics, Inc. 802.728.4533 P 802.728.3800 F sales@LUXdrive.com www.LUXdrive.com (c)2013 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com. Specifications subject to change without notice. May, 2013 - Rev 3.1 Made in the USA 3021/3023 BuckPuck TM Wide Range LED Power Module DATA SHEET Page 5 of 8 Microprocessor Control Figure 16 shows a typical interface for a Microchip PIC(R) or similar controller. The reference output provides the operating voltage for the processor (5V at up to 20mA current). Other Control Applications In addition to the configurations described above, the 3021/3023 may also be driven by a D to A converter. As in the cases above, the analog control signal should have its ground common to LED-. Figure 2 shows the effective control range of the analog input signal. Connections In all cases, the LEDs being driven should be located as close to the 3021/3023 LED output as possible. When the use of long leads is required, use heavier gauge wire. For strobe or pulse applications, a wire length not exceeding 6" should be used to maintain accurate timing. The power input wires/traces should also be kept short. Where DC input units are located more than 18" from the source, a 220F, 50V capacitor should be placed across the input terminals as shown in Figure 18. For applications where the use of header pins is inconvenient, a mating connector with 6" leads is available as an accessory, or the 3023 part number may be used, which is supplied with 6" colored leads. 3021HN - Harness for "N" type (4-wire) 3021HE - Harness for "E" & "I" type (6-wire) 3021HEP - Harness for "E" & "I" w/pot (6-wire w/pot) Application Figures LED+ Vin 3021/3023 LED- LED+ Vin 3021/3023 LED- Figure 4. 700 mA unit driving 6 High Power LEDs (VIN > 12VDC) LEDdynamics, Inc. 802.728.4533 P 802.728.3800 F sales@LUXdrive.com www.LUXdrive.com Figure 5. 700mA unit driving 12 High Power LEDs (VIN > 24VDC) (c)2013 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com. Specifications subject to change without notice. May, 2013 - Rev 3.1 Made in the USA 3021/3023 BuckPuck TM Wide Range LED Power Module DATA SHEET Page 6 of 8 LED+ Vin LED+ 3021/3023 Vin 3021/3023 LED- LED- Figure 6. 1000mA unit driving nine High Power LEDs at 1W each (VIN > 12VDC) Figure 7. 1000mA unit driving three High Power LEDs at 3W each (VIN > 12VDC) LED+ LED+ Vin Vin 3021/3023 3021/3023 LEDLED- Figure 8. 700mA unit driving one Cree MC-E emitter (VIN > 8VDC) Figure 9. 700mA unit driving three High Power LEDs at 2W each (VIN > 12VDC) LED+ LED+ Vin 3021/3023 CTRL REF Vin LED- 3021/3023 LED- CTRL + 5K CW Figure 10. External potentiometer using internal reference 5K EXT 5V SOURCE CW Figure 11. External potentiometer using external voltage source Figure 9. Figure 10. (c)2013 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com. Specifications subject to change without notice. May,using 2013 - Rev 3.1 LEDdynamics, Inc. External potentiometer using internal External potentiometer external voltage M ade in the 802.728.4533 P reference source USA 802.728.3800 F sales@LUXdrive.com * - Luxeon is a registered trademark of LumiLEDs Corporation www.LUXdrive.com 3021/3023 BuckPuck TM Wide Range LED Power Module DATA SHEET Page 7 of 8 LED+ Vin LED+ 3021/3023 Vin CTRL 3021/3023 LED- LED- REF 5K 5K REF CTRL CW CW 2N3906 Figure 12. External dimming plus ON/OFF control with switch closure LO = OFF HI = ON 5K 5K Figure 13. External dimming plus ON/OFF control with logic level input LED+ Vin LED+ 3021/3023 Vin 3021/3023 REF CTRL LED- LED- CTRL 2N3906 5K TTL/CMOS COM LO = OFF HI = ON Figure 14. Pulse/Strobe input 5V=OFF 5K Figure 15. Pulse/Strobe input 5V=ON LED+ Vin 3021/3023 CTRL LED+ LED- REF 0.1f Vin 3021/3023 CTRL REF LED- Vcc I/O R1 Other I/O Lines GND Figure 16. Interface to PIC or other microcontroller Figure 17. Using resistor for fixed current reduction Output is approximately: %IOUT = R1/50 Figure 15. Figure 16. (c)2013 LUXdrive, A Division of LEDdynamics, www.LUXdrive.com. Interface to PIC or other microcontroller Using resistor forInc. fixed current reduction SpecificationsOutput subject to change without notice. May, 2013 - Rev 3.1 LEDdynamics, Inc. is approximately: %IOUT = R1/50 M ade in the 802.728.4533 P USA 802.728.3800 F sales@LUXdrive.com www.LUXdrive.com 3021/3023 BuckPuck TM Vin Wide Range LED Power Module DATA SHEET Page 8 of 8 LED+ 3021/3023 REF CTRL LED- Figure 18. Place a capacitor across the input terminals when the distance to the DC power source is greater than 18 inches Physical Dimensions 21.0 mm [0.83"] 19.8 mm [0.78"] 5.8 mm [0.23"] 2.5 mm [0.10"] 11.0 mm [0.43"] 2.0 mm [0.08"] Pin Size 0.76mm [0.03"] Square Pin Spacing 2.5mm [0.10"] OC Recommended clearance envelope 3021 3023 6" - 24AWG Colored Leads 23.1 mm [0.91"] 3.0 mm [0.12"] 3.0 mm [0.12"] 23.1 mm [0.91"] LEDdynamics, Inc. 802.728.4533 P 802.728.3800 F sales@LUXdrive.com www.LUXdrive.com (c)2013 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com. Specifications subject to changesize without notice. May, 2013 - Rev 3.1 Shown approximately actual Made in the USA