 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| rev. page date 1 of 4 1/2009 PART NUMBER: VLD24-XXX DESCRIPTION: constant current dc-dc converter applications The VLD24-XXX series is a step-down constant current source designed for driving high power LEDs. The available output currents are: 300mA, 350mA, 500mA, 600mA, 700mA. Despite its compact size, the VLD24-XXX series is fully featured with very high efficiency, wide input voltage range, high ambient operating temperature, and two means of LED dimming: PWM digital dimming and analog dimming control, via a trim POT. features * * * * * * * * power LED driver high efficiency up to 95% wide input voltage range constant current output PWM digital dimming short-circuit protection analog dimming output on/off control model VLD24-300 VLD24-350 VLD24-500 VLD24-600 VLD24-700 input range (V dc) 5.5~36 5.5~36 5.5~36 5.5~36 5.5~36 output voltage (V dc) 2~32 2~32 2~32 2~32 2~32 output current (mA) 0~300 0~350 0~500 0~600 0~700 dimming control PWM+analog PWM+analog PWM+analog PWM+analog PWM+analog efficiency (%) 95 95 95 95 95 INPUT parameter input voltage quiescent input current in off mode input filter conditions/description absolute max before device failure opperating input range Vin = 24V, V DIM < 0.6V capacitor min 5.5 nom 24 max 40 36 400 units VDC VDC A OUTPUT parameter voltage range current range current accuracy current stability temp. coefficient maximum capacitive load conditions/description Vin is at least 1.5~4V higher than Vout Vin-Vout > 1.5~4V 300~700mA Vin = 24V, Vout = 2~32V -40C ~ 71C ambient min 2 300 nom max 32 700 12 18 0.03 470 units VDC mA % % %/C F 8 10 PROTECTION CIRCUIT parameter conditions/description short-circuit protection regulated at rated output current 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page date 2 of 4 1/2009 PART NUMBER: VLD24-XXX DESCRIPTION: constant current dc-dc converter DIMMING AND CONTROL parameter remote on/off remote pin current PWM frequency conditions/description dc-dc ON (Vr on pin3) dc-dc OFF Vr = 5V min nom max open or 2.8V GENERAL parameter ambient temp. storage temp. max. case temp. RoHS case material dimensions weight efficiency conditions/description 300/350mA 500/600/700mA min -40 -40 -55 nom max 85 71 125 100 units C C C C yes plastic (UL94V-0) 22.8 x 10.2 x 9.5 (L x W x H) 3.5 at full load 95 g % DIGITAL DIMMING CONTROL 50% Duty Cycle 80% Duty Cycle 20% Duty Cycle Output current Output current(LED appears brighter) Output current(LED appears dimmer) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page date 3 of 4 1/2009 PART NUMBER: VLD24-XXX DESCRIPTION: constant current dc-dc converter ANALOG DIMMING CONTROL A +Vin 1 6 Cin VLD24-XXX 5 1 st LED G ND RW 4 2 3 La st LED ON /OFF /PWM POT Dim Cin = 47F for best performance Io can be set between 0A and Io(max) with trim pot Rw. For example, to set the output current (Io) to 200mA using the VLD24-350, choose Rw=0.4. The trim pot should be placed close to pins 1 and 2 with shortest possible leads. 0.75 0.703 0.657 Io_300w 0.61 0.563 Io_350w0.517 0.47 Io_500w0.423 0.377 Io_600w 0.33 0.283 Io_700w 0.237 0.19 0.143 0.097 0.05 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 Rw TYPICAL APPLICATION CIRCUITS +Vin 1 6 Cin +Vin 1 6 Cin VLD24-XXX 4 2 3 La st L ED POT Dim ON/ OFF /PWM VLD24-XXX 4 5 2 3 ON/ OF F /PWM 1st LED La st L ED POT Dim GND 5 1st LED GND RW RW Figure 1a. Series Configuration Figure 1b. Parallel Configuration EMS FILTER CIRCUITS 700 H * 2 + Vin 1 F Cera mic 2 .2 F Fi ter2 T 1 6 Ce ra mic VLD24-XXX 5 42 3 Las t LED ON/OFF/PWM G ND 1s t LED 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 rev. page date 4 of 4 1/2009 PART NUMBER: VLD24-XXX DESCRIPTION: constant current dc-dc converter MECHANICAL DRAWING AND PIN-OUT 22.80(0.897) 0.50(0.020) 10.20 (0.401) 9.00(0.354) FOOTPRINT DETAILS Pin 1 7.62 (0.300) Function Vin 4.10(0.161) 17.78(0.700) Comments DC Supply 2 3 4 5 Analog Dim ON/OFF/PWM GND -Vout +Vout Set Output Current Output enable/PWM Do not connect to -Vout LED Cathode connection LED Anode connection 5 4 3 Bottom View 2 6 1 RECOMMENDED FOOTPRINT Top view,grid:2.54mm(0.1inch), diameter:1.00mm (0.039inch) 6 Note: Unit:mm(inch) Pin diameter:0.50mm(0.020inch) Pin tolerances: +0.10mm( +0.004inch) General tolerances: +0.25mm( +0.010inch) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 |
Price & Availability of VLD24-350
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |