DatasheetsPDF.com

SM2082B Dataheets PDF



Part Number SM2082B
Manufacturers Linkage
Logo Linkage
Description Single Channel LED Constant Current Driver
Datasheet SM2082B DatasheetSM2082B Datasheet (PDF)

GOSTON ELECTRONICS CO.,LTD SM2082B Single Channel LED Constant Current Driver v1.6 SM2082B Features  Patented constant current control technology  Output current adjustable with range 5mA~60mA  Inter-chip output current deviation <±4%  Over temperature protection  Sharing PCB board with LED lamps  Excellence EMI performance  Simple circuit and low cost  Package:ESOP8、TO252-2 General Description SM2082B is a single channel LED constant current driver which integrates patented constant .

  SM2082B   SM2082B



Document
GOSTON ELECTRONICS CO.,LTD SM2082B Single Channel LED Constant Current Driver v1.6 SM2082B Features  Patented constant current control technology  Output current adjustable with range 5mA~60mA  Inter-chip output current deviation <±4%  Over temperature protection  Sharing PCB board with LED lamps  Excellence EMI performance  Simple circuit and low cost  Package:ESOP8、TO252-2 General Description SM2082B is a single channel LED constant current driver which integrates patented constant current setting and control technology. The output current designed by external REXT is 5mA~60mA and it is invariant to OUT output voltage change, which has better constant current performance. It is a low cost circuit with simple circuit and less external components. Pin Figure Applications  T5/T8 LED tubes;  LED street lighting;  LED bulb lamp,LED ceiling lamp; Diagram 1. SM2082B Each Package Pin Diagram Pin Pin Function OUT GND Power input and constant current output GND REXT Output current setting port Typical Schematic Circuit Diagram 220V~ Vin LED1 C2 LEDn 1 OUT 2 GND 3 REXT Rext Diagram 2. SM2082B Typical Application Circuit In diagram 2, the power can be AC or DC. SM2082B Mail: [email protected] Tel: 0755 -27593075 Address: 3F,SSMEC Bldg.,15 South 1st Blvd.,South Area,Shenzhen H-igh tech Industrial Park,Nanshan Dist.,Shenzhen. Note: The latest datasheet is subject to the web(www.dianyuanic.com). -1- Fax: 0755 -29031113 GOSTON ELECTRONICS CO.,LTD SM2082B Single Channel LED Constant Current Driver v1.6 Limiting Values The ambient temperature is 25°C if there is no special instruction. Characteristic Parameters Symbol Output voltage VOUT Output current IOUT Operating current TOPT Storage temperature TSTG ESD withstand voltage VESD Range -0.5V ~ +250V 1mA ~ 60mA -40°C ~ +120°C -50°C ~ +150°C 2KV Thermal Resistance Parameters Symbol Explanation ESOP8 TO252-2 Unit RTHJA Thermal 89.2 74.9 ℃/W resistance (1)* Note(1)*:The chip should be mounted on PCB board with 200mm2 copper (35um thick) to dissipate heat. Electrical Operating Parameters The ambient temperature is 25°C if there is no special instruction. Parameters Symbol Conditions Min Typ Output voltage VOUT_MIN IOUT = 30mA -- Output withstand voltage VOUT_BV IOUT = 0 250 - Output current IOUT ----- 5- Static current VOUT = 10V,REXT no IDD - 0.16 connection REXT output voltage VREXT VOUT = 10V - 0.6 IOUT deviation dIOUT IOUT = 20mA - ±4 Over-temperature Protection point(2)* TSC - - 110 Note(2)*:When the junction temperature is over 110 ℃, the output current of SM2082B will be reduced. Max 6.5 60 0.25 - Unit V V mA mA V % ℃ Mail: [email protected] Tel: 0755 -27593075 Address: 3F,SSMEC Bldg.,15 South 1st Blvd.,South Area,Shenzhen H-igh tech Industrial Park,Nanshan Dist.,Shenzhen. Note: The latest datasheet is subject to the web(www.dianyuanic.com). -2- Fax: 0755 -29031113 GOSTON ELECTRONICS CO.,LTD SM2082B Single Channel LED Constant Current Driver v1.6 Output Current Characteristics SM2082B output current formula : IOUT  V REXT rext  0.6V (A)。 rext() Diagram 3. SM2082B The Relationship between Output Current and REXT Diagram 4. SM2082B Constant Current Graph Diagram 4 SM2082B constant current graph represents the lowest output voltage (VOUT_MIN:IOUT = 20mA, VOUT_MIN = 4.1V, IOUT = 30mA,VOUT_MIN = 4.6V;IOUT = 40mA,VOUT_MIN = 5.0V;IOUT = 50mA,VOUT_MIN = 5.5V) in normal temperature. Mail: [email protected] Tel: 0755 -27593075 Address: 3F,SSMEC Bldg.,15 South 1st Blvd.,South Area,Shenzhen H-igh tech Industrial Park,Nanshan Dist.,Shenzhen. Note: The latest datasheet is subject to the web(www.dianyuanic.com). -3- Fax: 0755 -29031113 GOSTON ELECTRONICS CO.,LTD SM2082B Single Channel LED Constant Current Driver v1.6 Diagram 5. SM2082B Output Current Temperature Characteristics(IOUT = 20mA 40mA) Temperature Compensation High temperature inside the LED lamps will cause serious LED light decay, which deduces LED service life. Temperature compensation of SM2082 helps to decrease output current automatically when the inside temperature is more than 110 ºC. Therefore, temperature inside lamps can be reduced. System Design SM2082B Vin LED1 LED2 Supply GND LEDn Rext 1 OUT 2 GND 3 REXT Diagram 6. 82B Application Circuit  Efficiency Design Diagram 6 below shows the application circuit efficiency formula:   PLED PIN  n * VLED * ILED VIN * I LED  n * VLED VIN Vin is system input power voltage. VLED is single LED drop voltage. ILED is LED current. It is can be seen that larger quantities of series LED in system brings higher efficiency. In system design, SM2082B output operating voltage is based on application environment so that it optimizes N value.  LED Series Number Design Designing LED series number in the system should consider two aspects below: In diagram 6, output voltage is VOUT = Vin – n*VLED. Mail: [email protected] Tel: 07.


WS3620 SM2082B SM2082C


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)