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SM2082BのメーカーはLinkageです、この部品の機能は「Single Channel LED Constant Current Driver」です。 |
部品番号 | SM2082B |
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部品説明 | Single Channel LED Constant Current Driver | ||
メーカ | Linkage | ||
ロゴ | |||
このページの下部にプレビューとSM2082Bダウンロード(pdfファイル)リンクがあります。 Total 11 pages
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.
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
1 Page 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.
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
3Pages GOSTON ELECTRONICS CO.,LTD
SM2082B Single Channel LED Constant Current Driver v1.6
Typical Application Circuit
AC Power Input
Diagram 7 shows AC power application circuit for SM2082B. The LED lights inside LED tubes can be
designed into series connection, parallel connection or the combination of the two. C1 is high voltage ceramic
capacitors to reduce Vin voltage and C2 electrolytic capacitors to reduce Vin voltage ripple. Rext is designed to
set LED current.
LED1-1 LED1-2 LED1-n
LED2-1 LED2-2 LED2-n
C1
220V~
Vin
LED lamp
C2
1 OUT
C3
2 GND
3 REXT
Rext
Diagram 7. SM2082B Typical Application Circuit – AC Power Input
The ceramic capacitor C1 is based on AC power and the number of LED series in tubes (0uF ~ 4.7uF). There
is no need to use C1 capacitor when the quantity of LED cascade is enough.
The larger capacitance C2 produces smaller voltage ripple to Vin, and keeps small ripple to SM2082 output
voltage. C2 capacitance depends on total operating current from LED tubes: the more current generates the
more C2 capacitance (usually 4.7uF/400V~22uF/400V). The formula is shown below :
C2 capacitance of filter capacitor
:C 2
I LED * t
V
In the formula, ILED is the constant current in the circuit, and time “ t” (50Hz) = (1/4)*(1/fAC) = 5ms. ΔV is
output voltage ripple.
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).
-6-
Fax: 0755 -29031113
6 Page | |||
ページ | 合計 : 11 ページ | ||
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PDF ダウンロード | [ SM2082B データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
SM2082 | Single-channel constant current LED driver controller chip | SUNMOON |
SM2082B | Single Channel LED Constant Current Driver | Linkage |
SM2082C | Single-channel constant current LED driver controller chip | Linkage |
SM2082D | Single-channel constant current LED driver controller chip | Linkage |