FC2082G [FS]
LED CONSTANT CURRENT DRIVER;
| 型号： | FC2082G |
| 厂家： | 
First Silicon Co., Ltd |
| 描述： | LED CONSTANT CURRENT DRIVER 驱动 |
| 文件： | 总12页 (文件大小：1112K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SEMICONDUCTOR
TECHNICAL DATA
FC2082G
LED CONSTANT CURRENT DRIVER
Feature
Description
Patented constant current technology
The FC2082G is a single channel LED constant current driver which
adopts the patented constant current control technology. The output current is
adjustable through the external Rext (5mA~60mA), and the chip is with
excellent constant current performance that the output current is not varied with
the variation of the OUT voltage. The cost is low with simple structure and fewer
peripheral components.
a) Adjustable OUT output current:
5mA~60mA
b) Output current error between chip
and chip: < ±4%
Input AC voltage: 120V/220V
Support SCR dimming Application
Overheating protection
Pin Diagram
GND
GND
Share PCB with LED
SM2082G
SM2082G
Simple circuit and low cost
Package: TO-252, SOT-89
OUT GND REXT
OUT
GND REXT
2
1
2
3
1
3
SOT-89
TO-252
(FC2082GD)
(FC2082GF)
Application
Typical Application1
NO Dimming application circuit
T5/T8 tube
…
LEDn
1
OUT
GND
REXT
LED street lamp
LED1
2
3
LED bulb lamp, LED ceiling lamp
Note: The above power could be AC or DC.
Typical Application2
Dimming application circuit
SCR dimming
1
2
3
OUT
GND
REXT
1
2
3
OUT
GND
REXT
LED1
LEDn
2018. 07. 09
Revision No : 1
1/12
FC2082G
Pin Description
TO-252 / SOT-89
Pin No.
Pin Name
OUT
Pin Description
1
2
3
The power input and Constant current output port
Ground
GND
REXT
Output current setting port
Order Information
Packing
Part Number
Package
Reel Size
Tube
/
Tape
FC2082GD
FC2082GF
TO-252
SOT-89
2500 pcs/ tape
13 inches
13 inches
/
4000 pcs/ tape
2018. 07. 09
Revision No : 1
2/12
FC2082G
Absolute Maximum Parameter
Unless otherwise stated, the ambient temperature is 25°C.
Symbol
VOUT
Description
Range
Unit
V
Out Voltage
Out Current
-0.5 ~ 450
1~ 60
IOUT
mA
TO-252
SOT-89
55
PN junction to ambient thermal
resistance
R
°C/W
°C
θJA
125
Operating junction temperature
range
TJ
-40 ~ 150
TSTG
VESD
Storage temperature
HBM human discharge mode
-55 ~ 150
>2
°C
KV
Note: The highest temperature of SMT product can't exceed 260°C, the temperature curve should be seted up by factory itself,
which based on J-STD-020 Standard, the factory practice and solder paste supplier’s suggestion.
Electric Operating Parameter
Unless otherwise stated, the ambient temperature is 25°C.
Symbol
VOUT_MIN
VOUT_BV
IOUT
Description
OUT input voltage
OUT withstand voltage
Output current
Condition
IOUT = 30mA
IOUT = 0
Min.
Typ.
Max.
6.5
-
Unit
V
-
-
-
450
V
-
5
-
-
60
0.25
-
mA
mA
V
VOUT = 10V, REXT: NC
VOUT = 10V
IDD
Quiescent current
REXT voltage
0.16
0.6
VREXT
-
IOUT error between chip and
chip
DIOUT
IOUT = 20mA
-
-
-
±4
-
-
%
Initial point of the negative
temperature compensation
°C
TSC
130
2018. 07. 09
Revision No : 1
3/12
FC2082G
OUT Output Current Characteristic
VREXT
0.6V
The OUT output current of FC2082G is given by:
I OUT
=
=
(A)
rext
rext(Ω)
Iout(mA)
Iout VS.rext
80
60
40
20
0
0
50
100 150
Rext (Ω)
200
250
Diagram 1. Relation Curve between FC2082G Output Current and rext
Iout(mA)
80
Iout VS. Vout
60
40
20
20mA
30mA
40mA
50mA
0
0
5
10
15
Vout (V)
20
25
30
Diagram 2. FC2082G Constant Current Curve
From the FC2082G constant current curve on Diagram 2, the OUT minimal voltage under normal temperature: IOUT = 20mA,
VOUT_MIN = 4.1V; IOUT = 30mA, VOUT_MIN = 4.6V; IOUT = 40mA, VOUT_MIN = 5.0V; IOUT = 50mA, VOUT_MIN = 5.5V.
Iout(mA)
80
Iout Temp Curve
60
40
40mA
20
0
60mA
-40 -20
0
20 40 60 80 100 120 140 160
TEMP (℃)
Diagram 3. FC2082G Output Current Temperature Characteristic
2018. 07. 09
Revision No : 1
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FC2082G
Temperature Compensation
When the interior temperature of the LED lamp is over high, there will be strong light failure and the life span of the LED will be
decreased. The FC2082G integrates temperature compensation, when the interior Tj of the chip exceeds 130℃, the output current will
be decreased automatically to lower down the interior temperature of the LED.
System Scheme Design
…
LEDn
Vin
Power
Supply
1
OUT
LED1
LED2
2
3
GND
GND
REXT
Rext
Diagram 4. FC2082G Application Circuit Schematic Diagram
Theory of Efficiency Design
The operating efficiency of the application circuit shown in Diagram 4 is given by:
PLED n*VLED *ILED n*VLED
η =
=
=
P
V *ILED
V
IN
IN
IN
Vin is the input power voltage, VLED is the forward voltage of a single LED, ILED is the operating current of LED. Therefore, the
bigger the number (n) of the cascaded LEDs is, the higher the operating efficiency is.
During the design of the system, the OUT operating voltage of the FC2082G needs to be adjusted in accordance with the
application environment to optimize η.
Design of Number of Cascaded LEDs
Two aspects need to be considered in the design of the number of cascaded LEDs:
1) In the circuit of Diagram 4, the OUT voltage VOUT = Vin – n*VLED, to guarantee the regular operation of the chip, the OUT voltage
VOUT > VOUT_MIN needs to be guaranteed;
2) The lower the OUT voltage is, the higher the operating efficiency of the system is.
In conclusion, the OUT operating voltage range is: VOUT_MIN ~ VOUT_MAX, and the number of cascaded LEDs is given by:
Vin - VOUT_MAX
VLED
Vin - VOUT_MIN
VLED
n
< <
2018. 07. 09
Revision No : 1
5/12
FC2082G
Application Description
Single-chip Application
Diagram 5 is the FC2082G application circuit diagram, the LED lamps in the LED tube can be connected in cascade or in
parallel or in combination of both; C1 is high-voltage ceramic capacitor, which is used to low down voltage of Vin; C2 is electrolytic
capacitor, which is used to lower down voltage ripple of Vin; Rext is used to set the operating current of LED tube.
C1
LED1
LED2
LEDn
Vin
C2
1
2
3
OUT
GND
REXT
LED Tube Lamp
AC~
Rext
Diagram 5. Typical Application Circuit— AC Power Input
The value of C1 is determined by the AC voltage and the number of the cascaded LEDs in the LED tube lamp, and normally
it’s0uF ~ 4.7uF. When the number of the cascaded LEDs is big enough, C1 is not needed.
The higher C2 is, the lower the Vin ripple and the OUT voltage ripple are. The value of C2 is determined by the summed
operating current of the LED tube lamp: the higher the current is, the bigger the value of C2 is, normally it’s 4.7uF/400V~22uF/400V,
and the specific value is given by:
I
*
t
V
LED
C2
=
Δ
ILED is the constant current of the whole scheme, t (time): (1/4)*(1/fAC)= 5ms (at 50Hz), ΔV is the OUT voltage ripple.
Parallel-chip Application
1
2
3
OUT
GND
REXT
IC1
Rext1
LED1-1
LED2-1
LED1-n
LED2-n
1
2
3
OUT
GND
REXT
AC~
IC2
C1
Rext2
RextN
1
2
3
OUT
GND
REXT
ICN
Diagram 6. Circuit Schematic Diagram of Parallel Application
Select the number of the parallel chips basing on the number of the LED lamps and the LED lamp operating current, and the
resistance of Rext1~RextN in the diagram can be set to be the same or different.
In the parallel-chip application, the system constant current threshold voltage is the maximal threshold voltage of the parallel
2018. 07. 09
Revision No : 1
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FC2082G
FC2082G when the values of the Rext are different.
Cascaded-chip in LED Tube Lamp
1
OUT
GND
REXT
AC~
LED
LED
LED
LED
2
C1
3
Rext
Diagram 7. FC2082G Cascaded in LED Tube Lamp
The FC2082G can be connected at GND, middle of the LED lamp or front of the LED lamp according to different application.
Typical Application
SOT-89 No flicker Application：3W
F1
1A/250V
DB1
MB6S
65V Light Bar （4 series 1 Parallel）
U1
…
220V~
LEDn
LED1
C2
10nF/1KV
C1
1uF/400V
R1 62R
1. The system will achive optimization when the voltage of LED lights series between 250V and 270V.
2. Output current change by R1 value.
3. Recommended to use C2 for anti-jamming device.
TO-252 No flicker Application: 16W
F1
1A/250V
DB1
MB6S
80 series 1 Parallel
U1
…
220V~
LEDn
LED1
C2
10nF/1KV
C1
10uF/400V
R2
1M
R1 11R
1. The system will achive optimization when the voltage of LED lights series between 250V and 270V.
2. Output current change by R1 value.
3. The value of R2 suggested between 510K and 1M for discharging resistance.
4. Recommended to use C2 for anti-jamming device.
2018. 07. 09
Revision No : 1
7/12
FC2082G
TO-252 SCR dimming Application: 12W
U2
GND
R3A
2K
R3B
2K
FR1
10R
SM2082G
SCR dimming
GND
OUT
REXT
U1
2
GND
1
3
VR1
220V~
7D471
D1
SM2082G
R2
M7
40.2R
GND
OUT
REXT
C1
2
1
3
22uF/ 400V
R4
510K
R1
8.2R
1. The system will achive optimization when the voltage of LED lights series between 230V and 250V.
2. Output current change by R1’s value; Bleeder current changed by R2’s value.
3. R3(AB) is a power resistance for reducing the power consumption of U2 FC2082G. It’s power consumption should below 1W.
4. The value of R4 suggested between 510K and 1M fordischarging resistance.
TO-252 Valley filling Application: 16W
F1
1A/250V
DB1
MB6S
76 series 1parellel
…
Vin
220V~
LEDn
LED1
C2
10nF/1KV
R1
750R/2W
R3 11R
R2
1M
C1
10uF
1.The system will achive optimization when the voltage of LED lights series between 230V and 250V.
2.Output current change by R3’s value.
3. The value of R2 suggested between 510K and 1M for discharging resistance.
4. Recommended to use C2 for anti-jamming device
2018. 07. 09
Revision No : 1
8/12
FC2082G
Typical Application EMI Test:
…
LEDn
LED1
LED2
F1
1A/250V
80 Cascade 1 Parallel
DB1
MB6S
LED Tube
Lamp
1
2
3
OUT
GND
REXT
220V~
C2
10uF
400V
R2
510K
R1
11R
E1 Discharge Resistor
EMI Test: N Line Test Report
2018. 07. 09
Revision No : 1
9/12
FC2082G
EMI Test: L Line Test Report
2018. 07. 09
Revision No : 1
10/12
FC2082G
TO-252 PACKAGE
Symbol
Min(mm)
2.0
Max(mm)
2.7
A
A1
b
-
0.2
0.5
1.1
c
0.3
0.8
D
6.3
6.9
D1
D2
E
4.9
5.7
4.83(REF)
5.9
2.086
9.5
6.4
2.486
10.7
e
L
L1
L2
L3
L4
Φ
θ
2.9(REF)
1.6(REF)
1.2
1.9
0.4
0.9
0°
-
1.2
1.5
10°
0.5
h
V
5.35(REF)
2018. 07. 09
Revision No : 1
11/12
FC2082G
SOT-89 PACKAGE
Symbol
Min(mm)
1.3
Max(mm)
1.8
A
b
0.2
0.7
b 1
c
0.25
0.2
0.75
0.6
D
4.3
4.8
E
2.2
2.8
E1
D1
e
3.8
4.5
1.55(REF)
1.5(TYP)
3.0(TYP)
e 1
L
0.8
1.5
2018. 07. 09
Revision No : 1
12/12
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