AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Pin Assignments The AL8806 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 8 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 30V. The AL8806 switches at frequency up to 1MHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AL8806 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming. MSOP-8EP SET GND GND CTRL Features • • • • • • • • • LED driving current up to 1.5A Better than 5% accuracy High efficiency up to 98% Operating input voltage from 6V to 30V High switching frequency up to 1MHz PWM/DC input for dimming control Built-in output open-circuit protection MSOP8-EP: Available in “Green” Molding Compound (No Br, Sb) with lead Free Finish/RoHS Compliant (Note 1) Notes: 1 2 3 4 AL8806 VIN N/C SW SW 8 7 6 5 Applications • • High power MR16 lamps General illumination lamps Multi-die LED driver 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at: http://www.diodes.com/products/lead_free.html Typical Application Circuit DFLS230LH D1 RSET 0R089 450µF D4 AL8806 Document number: DS35144 Rev. 2 - 2 C1 SET C2 AL8806 SW 12VAC DFLS230LH x4 GND ~ D3 VIN D2 CTRL NEW PRODUCT Description Multidie LED 1µF 33µH L1 D5 1 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER NEW PRODUCT Pin Descriptions Pin Name Pin Number MSOP-8EP Descriptions SW GND 5, 6 2, 3 Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI. GND Pin CTRL 4 SET 1 VIN 8 EP N/C EP 7 Dimming and On/Off Control Input. • Leave floating for normal operation. (VCTRL = VREF = 2.5V giving nominal average output current IOUTnom = 0.1/RS) • Drive to voltage below 0.4V to turn off output current • Drive with DC voltage (0.5V < VCTRL < 2.5V) to adjust output current from 20% to 100% of IOUTnom • A PWM signal (low level ≤ 0.4V and high level > 2.6; transition times less than 1us) allows the output current to be adjusted below the level set by the resistor connected to SET input pin. Set Nominal Output Current Pin. Configure the output current of the device. Input Supply Pin. Must be locally decoupled to GND with > 2.2µF X7R ceramic capacitor – see applications section for more information. Exposed pad/TAB connect to GND and thermal mass for enhanced thermal impedance no connection Absolute Maximum Ratings (TA = 25°C) Symbol ESD HBM ESD MM VIN VSW VCTRL ISW-RMS ISW-PK TJ TLEAD TST Caution: Parameter Human Body Model ESD Protection Machine Model ESD Protection Continuous VIN pin voltage relative to GND SW voltage relative to GND CTRL pin input voltage DC or RMS switch current Peak switch current (<10%) Junction Temperature Lead Temperature Soldering Storage Temperature Range Ratings Unit 2.5 200 -0.3~36 -0.3~36 -0.3 ~ 6 1.65 3 150 300 -65 to +150 kV V V V V A A °C °C °C The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any condition. Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices Recommended Operating Conditions (TA = 25°C) Symbol VIN VCTRLH VCTRLDC VCTRLL ISW fOSC TJ Parameter Operating Input Voltage relative to GND Voltage High for PWM dimming relative to GND Voltage range for 20% to 100% DC dimming relative to GND Voltage Low for PWM dimming relative to GND DC or RMS switch current Switching Frequency Junction Temperature Range AL8806 Document number: DS35144 Rev. 2 - 2 2 of 15 www.diodes.com Min Max Unit 6.0 2.6 0.5 0 30 5.5 2.5 0.4 1.5 1 125 V V V V A MHz °C -40 June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Electrical Characteristics VIN =12V, TA=25oC, unless otherwise specified. Symbol Parameter VINSU NEW PRODUCT VINSH IQ IS VTH VTH-H ISET RCTRL VREF RDS(on) ISW_Leakage θJA Notes: Conditions Min Typ. Internal regulator start up threshold VIN rising Internal regulator hysteresis threshold Quiescent current Input supply Current Set current Threshold Voltage Set threshold hysteresis SET pin input current CTRL pin input resistance Internal Reference Voltage On Resistance of SW MOSFET Switch leakage current Thermal Resistance Junction-toAmbient (Note 4) VIN falling Output not switching (Note 2) CTRL pin floating f = 250kHz VCTRL ≥ 2.6V or floating. VSET = VIN-0.1 Referred to internal reference ISW = 1A VIN =30V MSOP-8EP (Note 3) 100 95 1.8 100 ±20 16 50 2.5 0.18 69 Max Unit 5.9 V 300 mV 350 5 105 µA mA mV mV µA kΩ V Ω μA 22 0.35 0.5 °C/W 2. AL8806 does not have a low power standby mode but current consumption is reduced when output switch is inhibited: VSENSE = 0V. Parameter is tested with VCTRL ≤ 2.5V 3. Measured on an FR4 51x51mm PCB with 2oz copper standing in still air. Refer to figure 5 for the device derating curve. 4. Test condition: Device mounted on FR-4 PCB (51mm x 51mm 2oz copper, minimum recommended pad layout on top layer and thermal vias to bottom layer ground plane. For better thermal performance, larger copper pad for heat-sink is needed AL8806 Document number: DS35144 Rev. 2 - 2 3 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER . Typical Performance Characteristics (TA = 25°C unless otherwise stated) 900 400 L = 33µH V CTRL = 0V V SET = V IN TA = 25 °C 350 Frequency (kHz) 250 IIN (µA) TA = 25°C 700 300 200 150 NEW PRODUCT V IN = 12V 1 LED RSET = 150m Ω 800 100 600 L = 68µH 500 400 300 200 L = 100µH 50 0 100 0 1.6 1.4 5 0 10 15 20 25 30 VI N (V) Supply Current (not switching) vs. Input Current 60 3 4 VCTR L (V) Switching Frequency vs. VCT RL 5 TA = 25 °C 40 RSET = 100mΩ ICT RL (µA) LED CURRENT (A) 1.2 0.8 2 V SET = V IN = 12V L =68µH 1 1 80 RSET = 68mΩ TA = 25°C 0 RSET = 150mΩ 20 0 0.6 -20 0.4 -40 0.2 0 -60 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 V CTRL (V) ICTRL vs VCTRL 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 CTRL VOLTAGE (V) LED Current vs. VCTRL 3 2.52 V CTRL = Open V SET = V IN = 12V 2.5 2.51 V CTRL (V) V CTRL (V) 2 1.5 1 2.50 V CTRL = Open V SET = V IN 2.49 TA = 25 °C 0.5 0 0 5 10 15 20 VIN (V) V CTRL vs. Input Voltage (CTRL pin open circuit) AL8806 Document number: DS35144 Rev. 2 - 2 25 30 4 of 15 www.diodes.com 2.48 -40 -15 10 35 60 85 Ambient Temperature (°C) V CTRL vs. Temperature 110 June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Typical Performance Characteristics Continued (TA = 25°C unless otherwise stated) 200 0.9 180 0.8 160 3.5 0.7 140 3.0 0.6 1 LED R SET = 150m Ω LED Current Error (%) L = 68µH 0.5 2.5 LED Current Error 0.4 2.0 ILED 1.5 120 100 80 60 0.3 40 1.0 0.2 0.5 0.1 VCTRL = Open VSET = VIN 12V 20 0.0 0% 0 0 100% 20% 40% 60% 80% PWM Duty Cycle ILED vs. PWM Duty Cycle 260 TA = 25°C 0 5 15 20 25 VIN (V) RDS(ON) vs. Input Voltage 30 18 16 125 V SENSE 120 220 14 12 115 V SW 200 V SENSE (mV) RDS(ON) (mΩ) 10 130 240 180 160 110 10 105 8 100 6 4 95 140 RSET = 150m Ω L = 68µH V IN = 12V 1 LED Load 90 120 VCTRL = Open VSET = VIN 12V 100 -40 -15 10 35 60 85 AMBIENT TEMPERATURE (°C) SW RDS(ON) vs. Temperature 100% 85 110 80 0 2 2 0 4 6 Time (µs) SW Output Switching Characteristics -2 8 L = 33µH RSET = 150m Ω 90% TA = 25 °C 2 LED 80% 70% Duty Cycle NEW PRODUCT 4.0 V SW 4.5 LED Current (A) V IN = 12V RDS(ON) (mΩ) 1 5.0 60% 50% 40% 30% 20% 10% 0% 6 9 12 15 18 21 24 Input Voltage (V) Duty Cycle vs. Input Voltage AL8806 Document number: DS35144 Rev. 2 - 2 27 30 5 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Typical Operating Performance Characteristics (TA = 25°C unless otherwise stated) 1.5A nominal LED current 1.0A nominal LED current 10% 10% 8% 2 LEDs 6% 6% 2 LEDs 5 LEDs 4% DEVIATION % ERROR 6 LEDs 7 LEDs 7 LEDs 8 LEDs 3 LEDs 4% 2% 0% 1 LED -2% 8 LEDs 5 LEDs 3 LEDs 4 LEDs 2% 1 LED 0% -2% -4% -4% -6% -6% TA = 25°C L = 33µH RS = 66.67mΩ -8% -10% 6 9 12 15 18 21 24 INPUT VOLTAGE (V) 27 30 -8% TA = 25°C L = 33µH RS = 100mΩ -10% 6 9 12 15 18 21 24 INPUT VOLTAGE (V) 27 30 700 700 TA = 25°C L = 33µH RS = 66.67mΩ 600 SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHZ) 500 400 300 200 1 LED 100 T A = 25°C L = 33µH RS = 100mΩ 600 500 400 300 200 1 LED 100 2 LEDs 3 LEDs 4 LEDs 5 LEDs 6 LEDs 2 LEDs 3 LEDs 4 LEDs 5 LEDs 6 LEDs 7 LEDs 8 LEDs 0 6 9 12 15 18 21 24 INPUT VOLTAGE (V) 27 0 6 30 100% 9 8 LEDs 7 LEDs 12 15 18 21 24 INPUT VOLTAGE (V) 100% 4 LEDs 5 LEDs 6 LEDs 7 LEDs 8 LEDs 4 LEDs 7 LEDs 5 LEDs 6 LEDs 27 30 8 LEDs 3 LEDs 95% 95% 2 LEDs 3 LEDs 90% EFFICIENCY NEW PRODUCT 8% 6 LEDs 4 LEDs 2 LEDs 85% 90% 1 LED 85% 1 LED 80% 80% TA = 25°C L = 33µH RS = 100mΩ TA = 25°C L = 33µH RS = 66.67mΩ 75% 6 9 12 15 18 21 24 INPUT VOLTAGE (V) AL8806 Document number: DS35144 Rev. 2 - 2 75% 27 30 6 of 15 www.diodes.com 6 9 12 15 18 21 24 INPUT VOLTAGE (V) 27 30 June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Application Information AL8806 Operation In normal operation, when voltage is applied at VIN, the AL8806 internal switch is turned on. Current starts to flow through sense resistor RSET, inductor L1, and the LEDs. The current ramps up linearly, and the ramp rate is determined by the input voltage VIN and the inductor L1. DFLS230LH D1 RSET 12V 4.7µF 100nF SET C3 AL8806 Multidie LED 1µF SW C2 GND C1 CTRL VIN NEW PRODUCT 0R082 33µH GND L1 Figure 1: Typical Application Circuit This rising current produces a voltage ramp across RSET. The internal circuit of the AL8806 senses the voltage across RSET and applies a proportional voltage to the input of the internal comparator. When this voltage reaches an internally set upper threshold, the internal switch is turned off. The inductor current continues to flow through RSET, L1, the LEDs and the schottky diode D1, and back to the supply rail, but it decays, with the rate of decay determined by the forward voltage drop of the LEDs and the schottky diode. This decaying current produces a falling voltage at R1, which is sensed by the AL8806. A voltage proportional to the sense voltage across RSET is applied at the input of the internal comparator. When this voltage falls to the internally set lower threshold, the internal switch is turned on again. This switch-on-and-off cycle continues to provide the average LED current set by the sense resistor RSET. LED Current Control The LED current is controlled by the resistor RSET in Figure 1. Connected between VIN and SET the nominal average output current in the LED(s) is defined as: ILED = VTHD RSET If the CTRL pin is driven by an external voltage (higher than 0.4V and lower than 2.5V), the average LED current is: ILED = VCTRL VTHD VREF R SET For example for a desired LED current of 1.33A and a default voltage VCTRL=2.5V the resulting resistor is: R SET = VTHD VCTRL 0 .1 2 . 5 = ≈ 75mΩ ILED VREF 1.33 2.5 DC Dimming The CTRL pin can be driven by an external DC voltage (VCTRL), to adjust the output current to a value below the nominal average value defined by RSET. The LED current decreases linearly with the CTRL voltage when 0.5V ≤ VCTRL ≤ 2.5V, as shown on page 4 for 4 different current levels. Note that 100% brightness setting corresponds to VCTRL = VREF, nominally 2.5V. For any voltage applied on the CTRL pin that is higher than VREF, the device will not overdrive the LED current and will still set the current according to the equation VCTRL = VREF. When the CTRL voltage falls below the threshold, 0.4V, the output switch is turned off which allows PWM dimming. AL8806 Document number: DS35144 Rev. 2 - 2 7 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Applications Information (continued) PWM Dimming LED current can be adjusted digitally, by applying a low frequency Pulse Width Modulated (PWM) logic signal to the CTRL pin to turn the device on and off. This will produce an average output current proportional to the duty cycle of the control signal. In particular, a PWM signal with a max resolution of 10bit can be applied to the CTRL pin to change the output current to a value below the nominal average value set by resistor RSET. To achieve this resolution the PWM frequency has to be lower than 500Hz, however higher dimming frequencies can be used - at the expense of dimming dynamic range and accuracy. 700 LED current [mA] 600 500 400 300 200 100 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 7% 8% 9% 10% PWM dimming [%] Figure 2. PWM Dimming at 500Hz 70 60 LED current [mA] NEW PRODUCT Typically, for a PWM frequency of 500Hz the accuracy is better than 1% for PWM ranging from 1% to 100%. 50 40 30 20 10 0 0% 1% 2% 3% 4% 5% 6% PWM dimming [%] Figure 3. Low duty cycle PWM Dimming at 500Hz The PWM pin is designed to be driven by both 3.3V and 5V logic levels directly from a logic output with either an open drain output or push-pull output stage. AL8806 Document number: DS35144 Rev. 2 - 2 8 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Applications Information (continued) Soft Start NEW PRODUCT The AL8806 does not have in-built soft-start action – this provides very fast turn off of the output the stage improving PWM dimming accuracy; nonetheless, adding an external capacitor from the CTRL pin to ground will provide a soft-start delay. This is achieved by increasing the time taken for the CTRL voltage to rise to the turn-on threshold and by slowing down the rate of rise of the control voltage at the input of the comparator. Adding a capacitor increases the time taken for the output to reach 90% of its final value, this delay is 0.1ms/nF, but will impact on the PWM dimming accuracy depending on the delay introduced. Figure 4. Soft start with 22nF capacitor on CTRL pin (VIN = 30V, ILED = 667mA, 1 LED) AL8806 Document number: DS35144 Rev. 2 - 2 9 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Applications Information (continued) Reducing output ripple Peak to peak ripple current in the LED(s) can be reduced, if required, by shunting a capacitor C2 across the LED(s) as shown already in the circuit schematic. A value of 1μF will reduce the supply ripple current by a factor three (approx.). Proportionally lower ripple can be achieved with higher capacitor values. Note that the capacitor will not affect operating frequency or efficiency, but it will increase start-up delay, by reducing the rate of rise of LED voltage. By adding this capacitor the current waveform through the LED(s) changes from a triangular ramp to a more sinusoidal version without altering the mean current value. The small size of ceramic capacitors makes them ideal for AL8806 applications. X5R and X7R types are recommended because they retain their capacitance over wider voltage and temperature ranges than other types such as Z5U. A 2.2μF input capacitor is sufficient for most intended applications of AL8806; however a 4.7μF input capacitor is suggested for input voltages approaching 30V. Diode Selection For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode with low reverse leakage at the maximum operating voltage and temperature. The Schottky diode also provides better efficiency than silicon PN diodes, due to a combination of lower forward voltage and reduced recovery time. It is important to select parts with a peak current rating above the peak coil current and a continuous current rating higher than the maximum output load current. In particular, it is recommended to have a diode voltage rating at least 15% higher than the operating voltage to ensure safe operation during the switching and a current rating at least 10% higher than the average diode current. The power rating is verified by calculating the power loss through the diode. Schottky diodes, e.g. B240 or B140, with their low forward voltage drop and fast reverse recovery, are the ideal choice for AL8806 applications. Thermal and layout considerations For continuous conduction mode of operation, the absolute maximum junction temperature must not be exceeded. The maximum power dissipation depends on several factors: the thermal resistance of the IC package θJA, PCB layout, airflow surrounding the IC, and difference between junction and ambient temperature. The maximum power dissipation can be calculated using the following formula: PD(MAX ) = (125°C − 25°C) = 1.45 W where 69°C / W TJ(MAX) is the maximum operating junction temperature, TA is the ambient temperature, and θJA is the junction to ambient thermal resistance. The recommended maximum operating junction temperature, TJ, is 125°C and so maximum ambient temperature is determined by the AL8806’s junction to ambient thermal resistance, θJA. To support high LED drive at higher ambient temperatures the AL8806 has been packaged in thermally enhanced MSOP-8EP package. θJA, is layout dependent and the AL8806 in MSOP-8EP’s θJA on a 51 x 51mm single layer PCB with 2oz copper standing in still air is approximately 69°C/W. Therefore the maximum power dissipation at TA = 25°C is: (125°C − 25°C) = 1.45 W PD(MAX ) = 69°C / W Figure 5, shows the power derating of the AL8806 on an FR4 51x51mm PCB with 2oz copper standing in still air. As the ambient temperature increases and/or the PCB area reduces the maximum power dissipated by the AL8806 will decrease. 1600 Power dissipation (mW) NEW PRODUCT Capacitor Selection 1400 MSOP-8EP 1200 1000 800 600 400 200 0 -40 -25 -10 5 20 35 50 65 80 Ambient temperature (°C) 95 110 125 Figure 5. Derating Curve AL8806 Document number: DS35144 Rev. 2 - 2 10 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Applications Information (continued) PCB Layout When laying out the PCB for the AL8806 the following should be observed: 1. The decoupling capacitor C1 has to be placed as close as possible to VIN 2. The sense resistor, RSET, has to be placed as close as possible to VIN and SET 3. The anode of the freewheel diode (D1), the SW pin and the inductor have to be placed as close as possible to each other to avoid ringing. SET AL8806 D1 C2 SW GND C1 VIN To avoid radiated EMI keep dashed tracks as short as possible CTRL NEW PRODUCT RSET L1 Figure 6. PCB Layout The AL8806 has two evaluation boards available on request (AL8806EV4 and AL8806EV6). Information can be found on the Diodes website and from a Diodes’ sales representative. Application Example A typical application example for the AL8806 is the MR16 lamp; which normally operate from 12VDC or 12VAC supplies, using conventional electromagnetic transformers or electronic transformers. As a replacement for MR16 halogen lamps, LED lamps offer a more energy efficient solution - radiating no heat and no Ultra Violet light. The low thermal impedance of the AL8806 and its 1.5A switch capability allows it drive some of the latest multidie LEDs; which increases the lamp’s luminance. This application example is intended to fit into the base connector space of an MR16 style LED lamp. The design has been optimized for part count and thermal performance for a multi-die LED in the Lens section as well as EMI conformance. Figure 7. MR16 Schematic AL8806 Document number: DS35144 Rev. 2 - 2 11 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Applications Information (continued) The output of the 12V transformer is fed into the bridge rectifier, comprising of D2, D3, D4 and D5. C10 offers an optional EMI filtering at the input. (see figure 9) Capacitor, CBULK, (capacitors C1 and C2 on the PCB and BOM are multiple components to reduce size) forms the bulk reservoir capacitance - used to sustain operation of the device during the low part of the rectified AC wave. In the case of a system driving two LEDs at 1.1A, one 470µF plus 47µF capacitors are required. NEW PRODUCT Capacitors C3 and C9 provide local decoupling for the AL8806 and for the schottky freewheeling diode, D1. It is important that C3 is as close as possible to the AL8806’s VIN pin and that C9 is as close to the VIN and shottky diode as possible, as reflected in the layout shown below in figure 8. The LED current is determined by the total resistance between the VIN and SET pins (R1 and R2 in figures 7 (schematic) and 8 (top PCB) and BOM). C4 decouples the LED connections, again to minimize EMI, as well as smoothing the current. D1 operates as the freewheeling diode, providing a current path for the LED current when the power switch at SW pin is off. Capacitors C5 to C9, 1.5nF have been added to improve the overall EMI performance. C5 is connected across the Supply pins to reduce radiation via the wiring. C6 and C7 also assist the reduction of EMI via the wiring. C8 snubs high frequency radiation from the harmonics in the switching regulator. A large number of vias have been used to improve the grounding effect throughout the PCB to improve the evaluation board’s EMI performance. Figure 8. AL8806EV6 evaluation board (Top) AL8806 Document number: DS35144 Rev. 2 - 2 Figure 9. AL8806EV6 evaluation board (Bottom) 12 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Applications Information (continued) AL8806EV6 BOM Count Designator Description Manufacturer Part Number Radial, 10 x 12.5mm Rubycon 25ZLH470M 1 C1 Capacitor, 470uF, 25V Aluminium Electrolytic 1 C2 Capacitor, 4.7µF 10% 50V X7R 1210 Kemet C1210X475K5RAC C3, C9, C10 Capacitor, 100nF 10% 50V X7R 0805 Kemet NIC NMC0805X7R104K50TRPF Capacitor, 100nF 10% 50V X7R 1206 Kemet NIC NMC1206X7R104K50TRPF Capacitor, 1.5nF 10% 50V or 100V, COG 0805 generic 6.6 x 6.6mm Coilcraft NIC Würth MSS7341-153ML NPIS64D150MTRF 744777115 MPZ2012S300A 3 NEW PRODUCT Package 1 C4 4 C5 ~ C8 1 C1210X475K5RAC C1206104K5RAC7800 L1 Inductor, shielded, 15µH 20% 1 L2 Inductor, ferrite bead, 6A, 30ohms @100MHz 0805 TDK 1 R1 Resistor, 0.15ohms 1% 250ppm 125mW 0805 generic 1 R2 Resistor, 0.2ohms 1% 250ppm 125mW 0805 generic 1 D1 Diode, schottky, 30V 2A DFLS230 (alternatives: DFLS230L or LH) PowerDi123 Diodes Inc DFLS230-7 4 D2 ~ D5 Diode, Super Barrier Rectifier, 30V 2A SBR2U30 PowerDi123 Diodes Inc SBR2U30P1-7 1 U1 IC, LED Driver, AL8806 MSOP-8EP Diodes Inc AL8806MP8-13 The AL8806 guarantees high level of performance both with 12VAC and 12VDC power supply. AL8806 Document number: DS35144 Rev. 2 - 2 13 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER Ordering Information NEW PRODUCT AL8806 XXX - XX Package Packing MP8 : MSOP-8EP 13 : 13” Tape & Reel Tape and Reel Part Number Suffix Device Package Code Packaging (Note 5) Quantity AL8806MP8-13 MP8 MSOP-8EP 2500/Tape & Reel Notes: -13 5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. Marking Information MSOP-8EP (Top View) a~z : Lead Free A~Z : Green MSOP-8EP Y : Year : 0~9 W : Week: A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week Logo Part Number AL8806 Part Number AL8806MP8-13 Package MSOP-8EP Package Information MSOP-8EP AL8806 Document number: DS35144 Rev. 2 - 2 14 of 15 www.diodes.com June 2011 © Diodes Incorporated AL8806 HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). NEW PRODUCT Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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