AL1663/AL1663R
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 15
Technical content
Features
Primary Side Regulation without Opto-coupler Valley Switching for Low Switching Loss Low Start-up Current High PF and Low THD High Efficiency Tight LED Current Variation Range Tight Output Open Voltage Variation Range Support both PWM Dimming and Analog Dimming Internal Protections Under Voltage Lock Out (UVLO) Output Over Voltage Protection (OVP) Output Short Protection (OSP) Over Current Protection (OCP) Thermal Fold-back Protection (TFP) Over Temperature Protection (OTP) Low System Cost Package: SO-8 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) AL1663 AL1663R SO-8 SO-8
Applications
General LED Lighting Driver with Dimming Function General Purpose Constant Current Source LED Backlighting Driver Smart LED Lighting Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. APWM PWMD COMP CS GND FB OUT VCC NC FB CS GND OUT APWM VCC COMP THE AL1663/AL1663R IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE AL1665.
Document number: DS38466 Rev. 3 - 3 2 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Typical Applications Circuit OUT+ VCC OUT CS GND R4 D1 C6 RTH AC Input F 1 VR 1 DB1 RCS R10 FB COMP R14C7 Ccomp Aux PWMD AL1663 APWM Rcomp Cvcc AL1663 Flyback Application Circuit T1 OUT VCC OUT CS GND R4 D1 RTH AC Input F 1 VR 1 DB1 RCS FB COMP Ccomp Aux PWMD AL1663 Rcomp Cvcc +R11 APWM AL1663 Buck-Boost Application Circuit OUT+ VCC OUT CS GND R4 D1 C6 RTH AC Input F 1 VR 1 DB1 RCS R10 FB COMP R14C7 Ccomp Aux NC APWM Rcomp Cvcc AL1663R AL1663R Flyback Application Circuit
Document number: DS38466 Rev. 3 - 3 3 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Pin Descriptions Pin Number Pin Name Function AL1663 AL1663R 1 8 APWM Analog dimming input pin or PWM signal input pin in PWM dimming mode 2 — PWMD PWMD signal input pin in PWM-to-DC dimming mode — 1 NC Not Connected 3 7 COMP Loop compensation pin 4 3 CS Current sense pin, connect this pin to the source of the primary switch 5 4 GND Ground 6 5 OUT Gate driver output 7 6 VCC Supply voltage of gate driver and control circuits of the IC 8 2 FB The feedback voltage sensing from the auxiliary winding Functional Block Diagram Valley Detector Logical Control UVLO &Bias Driver COMP FB OVP CS VCC OUT Gm OTP GND DIM Control VREF PWMD APWM Buffer 1.2V OCP TFP VREF VREF Temperature Detector TFP OTP 1(8) 3(7) 4(3) 5(4) 8(2) 7(6) 6(5) A(B) A for AL1663 B for AL1663R
Document number: DS38466 Rev. 3 - 3 4 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) (Note 4) Symbol Parameter Rating Unit VCC Power Supply Voltage -0.3 to 30 V VCS Voltage at CS to GND -0.3 to 7 V VFB FB Input -0.3 to 7 V VCOMP Loop Compensation Pin -0.3 to 7 V VOUT Driver Output Voltage -0.3 to 20 V VPWMD Voltage at PWMD to GND -0.3 to 7 V VAPWM Voltage at APWM to GND -0.3 to 7 V TJ Operating Junction Temperature -40 to +150 ºC TSTG Storage Temperature -65 to +150 ºC TLEAD Lead Temperature (Soldering, 10 sec) +300 ºC PD Power Dissipation at TA = +50ºC 0.65 W θJA Thermal Resistance (Junction to Ambient) 150 ºC/W θJC Thermal Resistance (Junction to Case) 23 °C/W ESD (Human Body Model) 2000 V CDM (Charged-Device Model) 1000 V Note: 4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. All voltages unless otherwise stated and measured with respect to GND. Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Symbol Parameter Min Max Unit TA Ambient Temperature (Note 5) -40 +105 °C Note: 5. The device may operate normally at +125°C ambient temperature under the condition not triggers temperature protection.
Document number: DS38466 Rev. 3 - 3 5 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Electrical Characteristics (@TA = +25°C, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Units UVLO Section VCC_TH Startup Threshold Voltage — 17 18.5 20 V VOPR_MIN Minimal Operating Voltage After Turn On 7 7.8 8.5 V VCC_OVP VCC OVP Voltage — 25 27 29.9 V Standby Current Section IST Startup Current VCC = VCC_TH -0.5V, before start up — 0.8 — µA ICC Operating Current FB, CS connect to GND, CGATE = 100pF — 1 — mA ICC_OVP Shunt Current in OVP Mode VCC > VCC_OVP — 5 — mA Drive Output Section tR Output Voltage Rise Time (Note 6) CL = 1nF — 90 — ns tF Output Voltage Fall Time (Note 6) CL = 1nF — 30 — ns VOUT_CLAMP Output Clamp Voltage VCC = 20V 13 14 15 V tON_MIN Minimum On Time (Note 6) — — 400 — ns tON_MAX Maximum On Time — — 22 — µs tOFF_MAX Maximum Off Time — — 35 — µs tOFF_MIN Minimum Off Time — — 2 — µs fMAX Maximum Frequency — — 150 — kHz Internal CS reference VREF Internal Reference Voltage — 0.291 0.3 0.309 V VCS_OCP Primary Current Clamp Voltage — — 1.2 — V Error Amplifier Gm Trans-Conductance — — 16.7 — µA/V ISOURCE Amplifier Source Current — — 10 — µA Feedback Input Section VFB_CV FB CV Threshold — 1.4 1.5 1.6 V APWM Section VAPWM_L PWM Signal Low Threshold Voltage — — — 0.3 V VAPWM_H PWM Signal High Threshold Voltage — 2.4 — — V — Linear Dimming Range on APWM — 0.3 — 2.4 V PWMD Section VPWM_L PWM Signal Low Threshold Voltage — — — 0.4 V VPWM_H PWM Signal High Threshold Voltage — 2 — — V Thermal Fold-back Section TREG Overheating Temperature Regulation (Note 6) — — +145 — oC Over Temperature Protection Section — Shutdown Temperature (Notes 6, 7) — — +165 — oC Notes: 6. These parameters, although guaranteed by design, are not 100% tested in production. 7. The device will latch when OTP happens and the device won’t operate constantly at this temperature.
Document number: DS38466 Rev. 3 - 3 6 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Performance Characteristics (Note 8) Startup Threshold Voltage vs. Ambient Temperature Minimum Operating Voltage vs. Ambient Temperature Operating Current vs. Ambient Temperature FB CV Threshold vs. Ambient Temperature Internal Reference Voltage vs. Ambient Temperature FB CV Threshold vs. VCC Voltage -40 -20 0 20 40 60 80 100 12018.0 18.5 19.0 19.5 20.0 VCC_TH (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 1200.9 1.0 1.1 1.2 1.3 1.4 ICC (mA) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 1201.2 1.3 1.4 1.5 1.6 1.7 VFB_CV (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 1207.0 7.2 7.4 7.6 7.8 8.0 VOPR_MIN (V) Ambient Temperature ( o 9 12 15 18 21 24 271.2 1.3 1.4 1.5 1.6 1.7 1.8 VFB_CV (V) VCC Voltage(V) -40 -20 0 20 40 60 80 100 120288 292 296 300 304 308 312 VREF (mV) Ambient Temperature ( o
Document number: DS38466 Rev. 3 - 3 8 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Application Information (Cont.) Start-up After AC supply is powered on, the capacitor Cvcc across V CC and GND pin will be charged up by BUS voltage through a start -up resistor RTH. Once VCC reaches VCC_TH, the internal blocks start to work. V CC will be supplied by V BUS until the auxiliary winding of Flyback transformer could supply enough energy to maintain VCC above VOPR_MIN. If VCC voltage is lower than VOPR_MIN switch will be turned off. After V CC exceeds V CC_TH, the drive block won’t start to switch on/off signals until V COMP is over the initial voltage V COMP_ST which can be programmed by RCOMP. The formula is shown as below. Such design can program startup on time t o reduce the startup time or reduce the output overshoot current. COMPSTCOMP RAVV 7004.1_ Where VCOMP_ST is the pre-charged voltage of COMP pin. RCOMP is shown as Figures 1 and 2. Generally, a big capacitance of CCOMP is necessary to achieve high power factor and stabilize the system loop (1μF to 2μF is recommended). The pre-charged voltage in start-up procedure can be programmed by RCOMP. Protections 1. Output Open Protection (OVP) The output voltage is reflected by the voltage on transformer’s auxiliary winding. Both FB pin and V CC pin of IC integrate over voltage protection function. When there is a rapid line and load transient, the output voltage may exceed the regulated value. If V CC exceeds V CC_OVP or V FB exceeds VFB_CV, the over voltage protection will be tr iggered, switch will be turned off and V CC will be discharged. Once V CC is below VOPR_MIN. the IC will shut down and be powered on again by BUS voltage through start up resistor. Thus, output over voltage depends on the minimum voltage between both OVP protections’ limitation. It can be gotten by below formula. 56, 6 SS OVP CC OVP FB CV AUX AUX NN RRV Min V VN N R Where VOVP is the output over voltage setting; R5 and R6 that is shown as Figure 1 divide reflected voltage. NAUX is the turns of auxiliary wind; NS is turns of the secondary wind. VCC_OVP is OVP Voltage of VCC. 2. Output short protection (OSP) When the output is shorted, the output voltage is clamped to zero. The output voltage of the auxiliary winding, which is prop ortional to the output winding, will drop do wn too. Once V CC is below VOPR_MIN, the IC will shut down and power on again by the BUS voltage through the start up resistor. 3. Over Current Protection (OCP) The AL1663/AL1663R has a build-in cycle by cycle over current protection of primary inductor c urrent. When CS pin voltage reaches the voltage VCS_OCP, switch will be turned off until next switch period. The maximum peak current (IPEAK (MAX)) of the inductor can be calculated as below: _CS OCP PEAK MAX CS VI R Where VCS_OCP means primary current clamp voltage that is 1.2V. RCS is current sense resistor which is shown as Figures 1 and 2. 4. Thermal Fold-back Protection (TFP) The AL1663/AL1663R has thermal fold -back function: it adopts self -adaptive control method which can prevent the system f rom breaking down caused by over temperature. The overheating temperature is set at +145°C. When the temperature of the IC is higher than this point; the device will decrease the voltage reference of the CS linearly till OTP happens. By this way, the devic e can limit system’s input power at high ambient temperature, preventing system’s temperature increases further.
- Over Temperature Protection (OTP)
According to the definition of mean output current, the mean output current can be obtained as below. tONS is discharge time of secondary side of transformer; tSW is the switch period. Where IP is primary peak current of transformer; RCS is current sense resistor which is shown as Figures 1 and 2. tONS is discharge time of secondary side of transformer; tSW is the switch period. VREF is internal reference voltage that is equal to 0.3V. The peak current at secondary side has following relationship with primary side peak current, if the effect of the leakage inductor is neglected. Where NPS is the turns ratio of Flyback transformer (NPS=1 for Buck-boost); IP is the primary peak current of the transformer. According to these above formulas, the mean output current can be induced finally by below expressions. Therefore, the constant output current control can be realized with appropriate parameter design. resistor, RN2 is a hundred Ω resistor, CN1 is a several µF capacitor. PF and THD can be improved by debugging these components. Figure 3. PF and THD Optimization Circuit
Document number: DS38466 Rev. 3 - 3 11 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Application Information (Cont.) Operation Parameters Design Setting the Current Sense Resistor RCS The current sense resistance can be calculated as following: PS REF CS O MEAN NVR I Where IO_MEAN is the mean output current; RCS is current sense resistor which is shown as Figures 1 and 2; VREF is internal reference voltage that is equal to 0.3V; NPS is the turns ratio of Flyback transformer (NPS=1 for Buck-boost). Setting Transformer Selection (T1) NPS is limited by the electrical stress of the switch MOSFET, can be calculated by below formula. _( ) _ 90% 2MOS BR DS IN MAX S PS O D F V V VN VV Where V MOS_(BR)DS is the breakdown voltage of the switch MOSFET. V IN_MAX is the max rated input voltage. ∆VS is the overshoot voltage clamped by RCD snobbier during OFF time. V O is the output voltage. V D_F is the forward voltage of secondary diode. N PS is the turns ratio of Flyback transformer (NPS=1 for Buck-boost); For boundary conduction mode and constant on time method, the peak current of primary inductance can be calculated as below. 0 _ 2 sin( )sin( ) 2 sin( ) O MEAN P IN RMS PS IN RMS PS II VNd V N Vo Where VIN_RMS is the rate input voltage; IP is the primary inductance current. NPS is the turns ratio of Flyback transformer (NPS=1 for Buck-boost); IO_MEAN is the mean output current; VO is the output voltage. The switching frequency is not constant for AL1663/AL1663R due to boundary conduction mode . To set the minimum switching frequency fMIN at the crest of the minimum AC input, primary inductance can be obtained by below formula. ( 2 ) IN RMS PS O P P IN RMS PS O MIN V N VL I V N V f Where VIN_RMS is the rate input voltage; IP is the primary inductance current. NPS is the turns ratio of Flyback transformer (NPS=1 for Buck-boost); IO_MEAN is the mean output current; VO is the output voltage; fMIN is the minimum switching frequency at the crest of the minimum AC input. According to the Faraday’s Law, the winding number of the inductance can be calculated by: PP P em LIN AB P S PS NN N Where, Ae is the core effective area. Bm is the maximum magnetic flux density.
Document number: DS38466 Rev. 3 - 3 12 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R
Ordering Information
S : SO-8 Product Version Packing 13 : 13" Tape & Reel Product Name Black : AL1663 R : AL1663R Part Number Package Code Package 13” Tape and Reel Quantity Part Number Suffix AL1663S-13 S SO-8 4000/Tape & Reel -13 AL1663RS-13 S SO-8 4000/Tape & Reel -13 Marking Information AL1663 (Top View) YY WW X X Logo WW : Week : 01~52; 52 YY : Year : 13, 14, 15~ X X : Internal Code 8 7 6 5 1 2 3 4 represents 52 and 53 week Part Number AL1663R (Top View) YY WW X X Logo WW : Week : 01~52; 52 YY : Year : 13, 14, 15~ X X : Internal Code 8 7 6 5 1 2 3 4 represents 52 and 53 week Part Number
Document number: DS38466 Rev. 3 - 3 13 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Package Outline Dimensions (All dimensions in mm.) (1) Package Type: SO-8 0 ° 8 ° 1 ° 7 ° R0.150(0.006) R0.150(0.006) 1.000(0.039) 0.300(0.012) 0.510(0.020) 1.350(0.053) 1.750(0.069) 0.100(0.004) 0.300(0.012) 3.800(0.150) 4.000(0.157) 7 ° 20:1 D 1.270(0.050) TYP 0.150(0.006) 0.250(0.010) 8 ° D 5.800(0.228) 6.200(0.244) 0.600(0.024) 0.725(0.029) 0.320(0.013) 8 ° 0.450(0.017) 0.820(0.032) 4.700(0.185) 5.100(0.201) Note: Eject hole, oriented hole and mold mark is optional. Option 1 Option 1 Option 2 0.350(0.014) TYP TYP TYP 9°~ 9°~
Document number: DS38466 Rev. 3 - 3 14 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R Suggested Pad Layout (1) Package Type: SO-8 Grid placement courtyard ZG Y E X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch)
Document number: DS38466 Rev. 3 - 3 15 of 15 www.diodes.com November 2023 © Diodes Incorporated NEW PRODUCT AL1663/AL1663R IMPORTANT NOTICE 1. DIODES INCORPORATED (Diodes) AND ITS SUBSIDIARIES MAKE NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO ANY INFORMATION CONTAINED IN THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON -INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 2. The Information contained herein is for informational purpose only and is provided only to illustrate the operation of Diodes’ products described herein and application examples. Diodes does not assume any liability arising out of the application or use of this document or any product described herein. This document is intended for skilled and technically trained engineering customers and users who design with Diodes’ products. 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