FC2082G FS | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 12
Technical content
Patented constant current technology 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 Share PCB with LED Simple circuit and low cost Package: TO-252, SOT-89 Application T5/T8 tube LED street lamp LED bulb lamp, LED ceiling lamp
Description
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. Pin Diagram 1 3 TO-252 OUT GND REXT SM2082G SOT-89 GND GND OUT SM2082G GND Typical Application1 NO Dimming application circuit LED1 LEDn SM2082G OUT GND REXT Note: The above power could be AC or DC. Typical Application2 Dimming application circuit SM2082G OUT GND REXT LED1 LEDn SM2082G OUT GND REXT SCR dimming SEMICONDUCTOR TECH NIC AL DATA FC2082G 2018. 07. 09 1/12Revision No : 1 LED CONSTANT CURRENT DRIVER REXT (FC2082GD) (FC2082GF)
Pin No. Pin Name Pin Description
1 OUT The power input and Constant current output port
2 GND Ground
3 REXT Output current setting port
TO-252 2500 pcs/ tape 13 inches 2018. 07. 09 2/12Revision No : 1 FC2082G SOT-89 / 4000 pcs/ tape 13 inches FC2082GF
Absolute Maximum Parameter Unless otherwise stated, the ambient temperature is 25°C. Symbol Description Range Unit VOUT Out Voltage -0.5 ~ 450 V IOUT Out Current 1~ 60 mA RθJA PN junction to ambient thermal resistance TO-252 55 °C/W SOT-89 125 TJ Operating junction temperature range -40 ~ 150 °C TSTG Storage temperature -55 ~ 150 °C VESD HBM human discharge mode >2 KV Note: The highest temperature of SMT product can't exceed 260°C, the temperature curve should be seted up by factory itself, dard, the factory practice and solder paste supplier’s suggestion. Electric Operating Parameter Unless otherwise stated, the ambient temperature is 25°C. Symbol Description Condition Min. Typ. Max. Unit VOUT_MIN OUT input voltage IOUT = 30mA - - 6.5 V VOUT_BV OUT withstand voltage IOUT = 0 450 - - V IOUT Output current 5 - 60 mA IDD Quiescent current VOUT = 10V, REXT: NC - 0.16 0.25 mA VREXT REXT voltage VOUT = 10V - 0.6 - V DIOUT IOUT error between chip and chip IOUT = 20mA - ±4 - % TSC Initial point of the negative temperature compensation - - 130 - °C which based on J-STD-020 Stan 2018. 07. 09 3/12Revision No : 1 FC2082G
OUT Output Current Characteristic The OUT output current of FC2082G is given by: (A)rext(Ω) 0.6V rext VI REXT OUT = = Diagram 1. Relation Curve between FC2082G Output Current and rext Diagram 2. FC2082G Constant Current Curve From the FC2082G constant current curve on Diagram 2, the OUT minimal voltage under normal temperature: IOUT = 20mA, Diagram 3. FC2082G Output Current Temperature Characteristic 0 50 100 150 200 250 Iout(mA) Rext (Ω) Iout VS.rext 0 5 10 15 20 25 30 Iout(mA) Vout (V) Iout VS. Vout 20mA 30mA 40mA 50mA -40 -20 0 20 40 60 80 100 120 140 160 Iout(mA) TEMP (℃) Iout Temp Curve 40mA 60mA FC2082G 2018. 07. 09 4/12Revision No : 1
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 Rext Power Supply Vin GND LED2 LEDnLED1 SM2082GOUT GND REXT Diagram 4. FC2082G Application Circuit Schematic Diagram Theory of Effi ciency Design The operating efficiency of the application circuit shown in Diagram 4 is given by: IN LED LED IN LEDLED IN LED V V * n I * V I * V * n P Pη == = 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 VO UT = 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: V ~ V OUT_MAX, and the number of cascaded LEDs is given by: LED OUT_MIN LED OUT_MAX V V Vinn V V Vin -< <- 2018. 07. 09 5/12Revision No : 1 FC2082G OUT_MIN
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. Rext Vin LED Tube Lamp AC~ LED2 LEDnLED1 SM2082G OUT GND 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’s 0uF ~ 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: V t IC LED 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 Rext1 IC1 IC2 ICN Rext2 RextN AC~ LED1-1 LED1-n LED2-1 LED2-n SM2082G OUT GND REXT SM2082G OUT GND REXT SM2082G OUT GND REXT 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 6/12Revision No : 1 FC2082G
FC2082G when the values of the Rext are different. Cascaded-chip in LED Tube Lamp Rext AC~ LED LED LED LED SM2082G OUT GND 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 R1 62R 220V~ DB1 MB6S 65V Light Bar （4 series 1 Parallel） 1uF/400V 1A/250V 10nF/1KV OUTGNDREXT SM2082G GND LED1 LEDn 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 R1 11R 220V~ DB1 MB6S 80 series 1 Parallel 10uF/400V 1A/250V 10nF/1KV OUTGNDREXT SM2082G GND LED1 LEDn 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 7/12Revision No : 1 FC2082G
TO-252 SCR dimming Application: 12W 510K FR1 10R 22uF/ 400V 40.2R 1 3 OUT GND REXT SM2082G GND R3A 8.2R 1 3 OUT GND REXT SM2082G GND VR1 7D471220V~ R3B SCR dimming 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 for discharging resistance. TO-252 Valley filling Application: 16W R3 11R Vin220V~ DB1 MB6S 76 series 1parellel 10uF 750R/2W 1A/250V 10nF/1KV OUTGNDREXT SM2082G GND U1 LED1 LEDn 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 8/12Revision No : 1 FC2082G
Typical Application EMI Test: LED Tube Lamp220V~
80 Cascade 1 Parallel
EMI Test: N Line Test Report 2018. 07. 09 9/12Revision No : 1 FC2082G
EMI Test: L Line Test Report 2018. 07. 09 10/12Revision No : 1 FC2082G
Symbol Min(mm) Max(mm) A 2.0 2.7 A1 - 0.2 b 0.5 1.1 c 0.3 0.8 D 6.3 6.9 D1 4.9 5.7 D2 4.83(REF) E 5.9 6.4 e 2.086 2.486 L 9.5 10.7 L1 2.9(REF) L2 1.2 1.9 L3 1.6(REF) L4 0.4 1.2 Φ 0.9 1.5 θ 0° 10° h - 0.5 V 5.35(REF) FC2082G 2018. 07. 09 11/12Revision No : 1
Symbol Min(mm) Max(mm) A 1.3 1.8 b 0.2 0.7 b 1 0.25 0.75 c 0.2 0.6 D 4.3 4.8 E 2.2 2.8 E1 3.8 4.5 D1 1.55(REF) e 1.5(TYP) e 1 3.0(TYP) L 0.8 1.5 2018. 07. 09 12/12Revision No : 1 FC2082G