AL1697_17 DIODES | Alldatasheet
Document overview
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Technical content
Features
T hree Internal High-Voltage MOSFET Options: R DSON) 2.8Ω(3A /400V), 4Ω(2A/600V) and 1.8Ω(4A /670V) for Super-Junction Tight Current Sense Tolerance : ± 3% Low Startup Current: 130µA Low Operation Current: 170µA (Switching Frequency at 4kHz) Single Winding Inductor Wide Range of Dimmer Compatibility NEMA SSL6 Dimming Curve Compliant Internal Protections Under Voltage Lockout (UVLO) Leading-Edge Blanking (LEB) Cycle- by-cycle Over Current Protection (OCP) Output Open/Short Protection (OVP/OSP) Thermal Foldback Protection (TFP) Over-Temperature Protection (OTP) SO-7 Package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) 5GND COMP RT VCC CS D FB SO-7
Applications
Mains Dimmable LED Lamps Offline LED Power Supply Driver Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more informa tion 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 <900 ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
Document number: DS38223 Rev. 6 - 2 2 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 Typical Applications Circuit RT GND U1 AL1697 AC Input FR1 DB1 COMP VCC D L2 R7 C2 C3 FB 6 CS LEDS Pin Descriptions Pin Number Pin Name Function
1 VCC Power Supply Voltage
2 RT Resistor Set the System’S Maximum tON
3 COMP Compensation for Current Control
4 GND Ground
5 FB Feedback for LED Open Protection Voltage
6 CS Current Sensing
7 D Drain of the Internal High Voltage MOSFET
tON_max R S Q tONS Detection (ZCD) VCC OVP VREF_OVP OVP D VCC CS GND RT Driver Supply Clamp Set tON_max tON_max COMP Gm VREF Sample and Hold - FB +STOP OCP
Document number: DS38223 Rev. 6 - 2 3 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) (Note 4) Symbol Parameter Rating Unit VCC Power Supply Voltage 18 V VD Voltage on Drain Pin (AL1697-30BAS7-13) 400 V Voltage on Drain Pin (AL1697-20CS7-13) 600 V Voltage on Drain Pin (AL1697-40DS7-13) 670 V IDS Continuous Drain Current TC = +25°C (AL1697-30BAS7-13) 3 A Continuous Drain Current TC = +25°C (AL1697-20CS7-13) 2 A Continuous Drain Current TC = +25°C, (AL1697-40DS7-13) 4 A VCS Voltage on CS Pin -0.3 to 7 V VRT Voltage on RT Pin -0.3 to 7 V VFB Voltage on FB Pin -0.3 to 7 V TJ Operating Junction Temperature -40 to +150 ° C TSTG Storage Temperature -65 to +150 ° C TLEAD Lead Temperature (Soldering, 10 seconds) +260 ° C PD Power Dissipation (TA = +50°C) (Note 5) 0.8 W JA Thermal Resistance (Junction to Ambient) (Note 5) 123 °C/W JC Thermal Resistance (Junction to Case) (Note 5) 19 °C/W – ESD (Human Body Model) 2,000 V Notes: 4. Stresses greater than those listed under “Absolute Maximum Rating s” may cause permanent damage to the device. These are st ress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommen ded Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect d evice reliability. All voltages unless otherwise stated and measured with respect to GND. 5. Device mounted on 1"x1" FR-4 substrate PCB, 2oz copper, with minimum re commended pad layout. Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Symbol Parameter Min Max Unit TA Ambient Temperature (Note 6) -40 +105 ° C VCC Operating VCC Voltage 10 VCC_CLAMP(Min) V Note: 6. The device may operate normally at +125° C ambient temperature under the condition not trigger tempera ture protection.
Document number: DS38223 Rev. 6 - 2 4 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 Electrical Characteristics (@TA = +25°C, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit UVLO VTH (ST) Startup Voltage – – 14.5 – V VOPR(MIN) Minimal Operating Voltage After Turn On – 8.5 – V VCC_CLAMP VCC Clamp Voltage ICC=1mA 14 15.5 – V Standby Current IST Start-Up Current VCC = VTH (ST)-0.5V, Before Start Up – 130 – µA ICC (OPR) Operating Current Switching Frequency at 4kHz – 170 – µA Source Driver RDS(ON)LV Low Voltage MOSFET On-State Resistance (Note 7) – – 1 – Ω High Voltage and Super-Junction MOSFET RDS(ON)HV Drain-Source On-State Resistance AL1697-30BAS7-13 – 2.8 3.4 Ω AL1697-20CS7-13 – 4 5.5 AL1697-40DS7-13 – 1.8 2.5 VDS Drain-Source Breakdown Voltage AL1697-30BAS7-13 400 – – V AL1697-20CS7-13 600 – – AL1697-40DS7-13 670 700 – IDSS Drain-Source Leakage Current AL1697-30BAS7-13 – – 1 µ A AL1697-20CS7-13 – – 1 AL1697-40DS7-13 – – 1 RT VRT_REF Reference Voltage of RT pin – – 0.5 – V Current Sense VCS_CLAMP CS Clamp Voltage – – 1 – V VREF Internal Current Loop Control Reference – 0.388 0.4 0.412 V tON_MIN Minimum tON – – 550 – ns tON_MAX Maximum tON RT=51kΩ, VCOMP=4V – 3.6 – µs tOFF_MIN Minimum tOFF (Note 7) – – 4 – µ s tOFF_MAX Maximum tOFF – – 260 – µ s FB VFB Feedback Voltage – 3.76 4.0 4.24 V IFB Feedback Pin Input Leakage Current VFB = 2V – 4 – μA Error Amplifier GM GM Trans-Conductance – – 25 – µA/V ISOURCE Amplifier Source Current – – 10 – µA ISINK Amplifier Sink Current – – 9 – µA Thermal Foldback and Over Temperature Protection (OTP) TFOLD Foldback Temperature (Note 7) – – +145 – ° C – Shutdown Temperature (Notes 7 & 8) – – +160 – ° C Notes: 7. These parameters, although guaranteed by design, are not tested in production. 8. The device will latch off when OTP happens, recovered after power cy cle and the device won’t operate normally at this temperature.
Document number: DS38223 Rev. 6 - 2 5 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 -40 -20 0 20 40 60 80 100 120120 130 140 150 160 170 180 190 200 210 Operating Current (A) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 Start-up Voltage (V) Ambient Temperature ( o Performance Characteristics (Note 9) Start-up Voltage vs. Ambient Temperature Minimum Operating Voltage vs. Ambient Temperature Start-up Current vs. Ambient Temperature Operating Current vs. Ambient Temperature VCC Clamp Voltage vs. Ambient Temperature FB Leakage Current vs. Ambient Temperature Note: 9. These electrical characteristics are tested under DC condition. The a mbient temperature is equal to the junction temperature of the devic e. -40 -20 0 20 40 60 80 100 120 100 110 120 130 140 150 160 170 180 Start-up Current (A) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 Minimum Operating Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 9.0 10.5 12.0 13.5 15.0 16.5 18.0 19.5 VCC Clamp Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 FB Leakage Current (A) Ambient Temperature ( o
Figure 1. Typical Application Circuit (VOUT) rectified by one diode (D2). In this way the system can provide VCC supply at low dimming angle. The AL1697 has an internal VCC clamp voltage (typical 15.5V), which is limited by one internal active Zener diode. VOPR(MIN) and VCC clamp voltage.
between over current detection and actual source-switch off, so the actual peak current is a little higher than the OCP level set by the R5. the over voltage condition still exists, the system will work in hiccup mode. When LED is shorted, the device cannot detect the tOFF time, and the device controls the system operation at 4kHz low frequency. Figure 2. Thermal Foldback Waveform source supply has been reset and power up.
Document number: DS38223 Rev. 6 - 2 8 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 Functional Description and Application Information (Cont.) The AL1697 is a closed loop constant current control with the relationship between output current and current sense voltage follows this equation 1 sin( ) R5 OFF REF PEAK ON OFF DELAY tV I d t t t Where, VREF is the internal reference, typical 0.4V. R5 is the current sense resistor So we can get the output current equation as below, 1= 25 REF O MEAN VI R Inductance Selection (L2) In buck-boost structure, the peak current of the inductance can be calculated as below 0 _ 2 sin( )5 sin( ) 2 sin( ) REF PEAK IN RMS IN RMS VI VRd V Vo Where, VIN_RMS is the input voltage’s RMS value VO is the system output voltage The AL1697 controls the system operating at boundary c onduction mode which results in its operating frequency n ot being constant. To set the minimum switching frequency fMIN at the crest of the minimum AC input. IN RMS O PEAK IN RMS O MIN VVL I V V f According to the Faraday’s Law, the winding number of the inductance can be calculated by:
2 PEAK
L em LIN AB Where, Ae is the core effective area. Bm is the maximum magnetic flux density. tON_MAX Setting In order to get a good dimmer compatibility and a good dimming depth, the device sets a tON_MAX by one external resistor RT (R6). And the tON_MAX time has the below equation: 3.3 +0.510 R6 REF ON MAX RT REF Ct V uA Where VRT_REF is the internal RT pin 0.5V’s reference. CREF is the internal 1.5pF capacitor.
Document number: DS38223 Rev. 6 - 2 10 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 Functional Description and Application information (Cont.) The passive bleeder includes a capacitor (C2, in hundreds of nF) to provide latching current. A resistor (R1) is necessa ry to dampen the current spike. Because a large C2 will affect the PF, THD and effic iency, the value of the capacitor (C2) should be selected a ccordingly. Generally, 100nF/400V to 330nF/400V is recommended. R1 is used to limit the latching current, If R1 is too large, the latching current is not enough and the TRIAC dimmer will misfire causing LED flick er. If R1 is too small, it will result in greater power dissipa tion. Generally speaking , a 200Ω to 2KΩ resistor is selected for R1. Passive Damping Design FR-1 is the damper for reducing the spike current caused by quick charging of C2 at firing. In General, FR-1 is selected from 20Ω to 100Ω for low line like 120VAC application, and 51Ω to 200Ω for high line like 230VAC application.
Ordering Information
Part Number Package Code Package 13” Tape and Reel Quantity Part Number Suffix AL1697-30BAS7-13 S7 SO-7 4000/Tape & Reel -13 AL1697-20CS7-13 S7 SO-7 4000/Tape & Reel -13 AL1697-40DS7-13 S7 SO-7 4000/Tape & Reel -13 Marking Information (1) SO-7 1697 - ZZZZ (Top View) YY WW X X Part Number 1697-20C for 2.0A/600V 1697-40D for 4.0A/700V Logo WW : Week : 01~52; 52 YY : Year : 15,16,17 ~ X X : Internal Code 7 6 5 1 2 3 4 represents 52 and 53 week 20 : 2 .0 A 30 : 3 .0 A 40 : 4 .0 A A L1697 – XX X X X X – 13 M O S F E T V o lta g eC u rre n t O p tio n BA : 400 V C : 600 V D : 650 V S 7 : SO -7 P a c k a g e P a c k in g 13 : 13 " T a p e & R e e l 1697-30BA for 3.0A/400V 1697-20C for 2.0A/600V 1697-40D for 4.0A/650V
Document number: DS38223 Rev. 6 - 2 11 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 Package Outline Dimensions (All dimensions in mm.) (1) Package Type: SO-7 3.800(0.150) 4.000(0.157) 1.270(0.050) TYP 4.700(0.185) 5.100(0.201) 0.330(0.013) 0.510(0.020) 0.150(0.006) 0.250(0.010) 0.080(0.003) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.450(0.017) 0.800(0.031) 5.800(0.228) 6.200(0.244) 2.54(0.100) TYP 1.250(0.049) 1.500(0.059) Note: Eject hole, oriented hole and mold mark is optional. Option 2 45° 0.350(0.014) TYP Option 1
Document number: DS38223 Rev. 6 - 2 12 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 Suggested Pad Layout (1) Package Type: SO-7 ZG E X Y Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch) (mm)/(inch)
Document number: DS38223 Rev. 6 - 2 13 of 13 www.diodes.com October 2017 © Diodes Incorporated AL1697 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRES S OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ME RCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, correction s or other changes without further notice to this document and any produ ct described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product des cribed herein; neither does Diodes Incorporated convey a ny license under its patent or trademark rights, nor the rights of others. Any Custom er or user of this document or products described her ein in such applications shall assume all risks of such use and will agree to hold Diodes Incorpo rated and all the companies whose products are represe nted on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Cus tomers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. P roduct names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated int o multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support dev ices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perfor m when properly used in accordance with instructions for u se provided in the labeling can be reasonably expected to result in signi ficant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their lif e support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-criti cal, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorpo rated. Further, Customers must fully indemnify Diodes Incor porated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2017, Diodes Incorporated www.diodes.com