7023-D-I-1000 Datasheet, PDF (3/8 Pages) List of Unclassifed Manufacturers – Wide Range LED Power Module

7021/7023 BuckPlus^TM
Wide Range LED Power Module
DATA SHEET Page 3 of 8
Specifications
Output current, 7021-x-x-350, 7023-x-x-350 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350mA¹
Output current, 7021-x-x-500, 7023-x-x-500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA¹
Output current, 7021-x-x-700, 7023-x-x-700 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700mA¹
Output current, 7021-x-x-1000, 7023-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 μs
Control Pin, input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5k ohm
Reference voltage (V_in= 7V or greater) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V_DC ±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 μs
Output rise time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10 μs³
Output fall time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <350 μs³
Quiescent current (no load or control pin high) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <4.5 mA³
Operating temperature (Tcase). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40-+80°C
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40-+125°C
Application Information
Description
The 7021/7023 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 7021/7023 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
LEDjunction(s) connected in series (2.5V. Thus, for a series string of six junctions having an average forward drop of
3.5Veach, the required minimum input voltage will be 21V_DC. A standard 24V_DC 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 insure current sharing. The nature of the LEDs
themselves will provide sufficient current sharing if the parallel strings comprise 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
[e-mail]
www.LUXdrive.com
©2010 LUXdrive, A Division of LEDdynamics, Inc. www.LUXdrive.com.
Specifications subject to change without notice. April, 2010 - Rev 2.2
Made _{in the USA}