RLD1301 AC LED Driver
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- Brittany Poole
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1 AC LED Driver General Description is a AC direct driver (ACDD) for LED lights. Inductor and electrolyte capacitors are not necessary implementing a driving circuit. Thus the lifetime of LED lights can be extended up to LED chips itself. The output current level is adjustable via an external resistor. Dimming control can be accomplished with current control circuit or TIAC phase control switch. The NTC (Negative Temperature Coefficient) characteristics of the control block ensure stable operation of LED lights under over 2 Package Type : P-G Heat Sink voltage and over temperature. THD (Total Harmonic Distortion) can be reduced to below %, and PF (Power Factor) is close to. offers the competitive solution for AC direct drive LED lights with a robust long [Top view] [Bottom view] lifetime and cost effectiveness. Schematic & PIN Configuration Features Pin. 2 2) Pin. AC direct drive IC (ADDI) for LED lights No electrolyte capacitor, No inductor Low THD High PF Long lifetime No EMI issue Dimming controllable Negative temperature coefficient Applications Bulb type LED light PA type LED light Panel type LED light Street type LED light Down light Control Block Pin. 3 Pin. 4 Pin. 5 : NC 2 : 3,4 : 5 : 2) Heat sink connected to pin. 2 Device Symbol
2 Absolute Maximum atings at T A Parameter Symbol atings Unit Voltage V DD V Current I D ma Power Dissipation* ) P D 2. W Operating Temperature T OP - ~ 85 Junction Temperature T J 5 Storage Temperature T STG -65 ~ 5 *) voltage and drain current should be determined by considering the power dissipation rating C C C Electrical Characteristics 5mm 2 Heat sink* 2), T A= 25 C Parameter Symbol Conditions Min. Typ. Max. Unit Voltage V DD 4 V = 6, V DD=5V ma Current I D = 9, V DD=5V ma = 8, V DD=5V ma = 55, V DD=5V 8 9 ma *2) Device mounted on 2oz copper heat sink on F4 Test circuit Pin. 2 Pin. Control Block V DD Pin. 3 Pin. 4 Pin. 5
3 Current vs. Voltage Current vs. Voltage 5mm 2 Heat sink, Copper 2oz, T A 5mm 2 Heat sink, Copper 2oz, T A = 8 ohm = 8 ohm Voltage, V DD [V] Voltage, V DD [V] Current vs. Adjustment esistor Current vs. Operating Time 5mm 2 Heat sink, Copper 2oz, V DD = 5V Measured at min after power on T A T A = 5 o C T A = o C 5mm 2 Heat sink, Copper 2oz, V DD = 5V, T A = 8 ohm 3 5 Adjustment esistor, [ohm] Operating Time after Power On, T OP [min] sec Current vs. Ambient Temperature Power Derating vs. Ambient Temperature 5mm 2 Heat sink, Copper 2oz, V DD = 5V 2.5 Measured at min after power on = 8 ohm Power Dissipation, P D [W] Heat sink : mm 2, copper 2oz Heat sink : 3mm 2, copper 2oz Heat sink : 5mm 2, copper 2oz Ambient Temperature, T A [ o C]. Ambient Temperature, T A [ o C]
4 PKG Dimensions Unit : mm 2.±..5±.. 4±..35±..5±..±. 6.±. 5.3±. 2.2±..±..5±..65±.5.8±..2±..3±. Marking Information Land Pattern Unit : mm Land pattern area Solder mask area.4.25
5 Heat Sink Pattern Unit : mm mm 2 / Copper 2oz 3mm 2 / Copper 2oz 5mm 2 / Copper 2oz
6 ACDD- Type Application Circuit for the 5~2W LED Lights 2 NC Sourc e NC I OUT V LED = n * V F = ~7V 9 3 Fuse V LED = n * V F = ~7V n NC 4 V MS 2V L2 : 33uH C nf/2vac NC n V LED = n * V F = ~7V 5 V LED = n * V F = ~7V n NC 6 8 Sour Sour AD Drai NC 7 T A : 25 o C, Unit : Ω Input Voltage Power I OUT VAC Hz 5W 23mA K 33K 6W 27mA K 33K 7W 32mA K 33K 8W 36mA K 33K 9W 4mA K 33K W 45mA K 33K W 5mA K 33K 2W 55mA K 33K ) 2 7 must be used resistor above /2 W 2), 3, 4, 5, 6, 8, 9, must be used resistor above /4 W
7 Example : 8W bulb type LED lights Luminance Efficacy vs. Input Voltage Input Power vs. Input Voltage 2 Luminance Efficacy, [lm/w] Measured at 5min after power on Measured at 5min after power on O TA=25 C Input Power, PIN [W] PKG : P34, VF : 3.~3.2V, IF : 3mA PKG : P34, VF : 3.~3.2V, IF : 3mA Power Factor vs. Input Voltage Total Harmonic Distortion vs. Input Voltage 3 2. o o TA= 25 C TA= 25 C.8 25 Power Factor, PF Input Voltage, VIN [VMS] Input Voltage, VIN [VMS] Total Harmonic Distortion, THD [%] O TA=25 C PKG : P34, VF : 3.~3.2V, IF : 3mA Input Voltage, VMS [V] 25 PKG : P34, VF : 3.~3.2V, IF : 3mA Input Voltage, VMS [V] Bulb case was covered when testing Fsemi Technologies, Inc. ev. 4
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