AL1692
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 15
Technical content
Features
Tight Current Sense Tolerance: ±3% Low Startup Current: 100µA Typical Low Operation Current: 210µA (Switching Frequency at 4kHz) Single Winding Inductor Wide Range of Dimmer Compatibility For Controller Power Can Drive up to 25W For MOSFET Options: 600V/2A NEMA SSL6 Dimming Curve Compliant Internal Protections Undervoltage Lockout (UVLO) Leading-Edge Blanking (LEB) Cycle-by-Cycle Overcurrent Protection (OCP) Output Open/Short Protection (OVP/OSP) Thermal Foldback Protection (TFP) Overtemperature Protection (OTP) SO-8 (Controller) and SO-7 (With MOSFET) Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Pin Assignments (Top View) COMP GND RT VCC CS SW FB NC SO-8 (Top View) GND COMP RT VCC CS D FB SO-7
Applications
Mains dimmable LED lamps Offline LED power supply drivers Notes: 1. No purposely added lead. Fully EU Directive 2002/95/ EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ 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.
Document number: DS39008 Rev. 3 - 2 2 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Typical Application Circuits RT GND U1 AL1692 AC Input FR1 DB1 COMP VCC SW L2 R7 C2 C3 FB 6 CS LEDS R10 NC7 AL1692 Controller in Buck-Boost RT GND U1 AL1692 AC Input FR1 DB1 COMP VCC D L2 R7 C2 C3 FB 6 CS LEDS AL1692-20C Integrated MOS Version in Buck-Boost RT GND U1 AL1692 AC Input FR1 DB1 COMP VCC SW C4 R6 C2 C3 FB 6 CS R10 NC7 OUT+ C5 R11 CY AL1692 Controller in Fly-Back
Document number: DS39008 Rev. 3 - 2 3 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Pin Descriptions Pin Number Pin Name Function SO-8 SO-7 1 1 VCC Power supply voltage 2 2 RT Resistor set the system’s maximum tON 3 3 COMP Compensation for current control 4 4 GND Ground 5 5 FB Feedback for LED open protection voltage 6 6 CS Current sensing 7 7 NC (SO-8) Not connected D (SO-7) Drain of the internal high voltage MOSFET 8 — SW Source driver of Switch Functional Block Diagram VCC Management Fault Management UVLO OFF VCC Clamp OTP OVP VDD VREF STOP tON_max R S Q tONS Detection (ZCD) VCC OVP VREF_OVP OVP SW VCC CS GND RT Driver Supply Clamp Set tON_max tON_max COMP GM VREF Sample and Hold FB STOP OCP 1.6V NC AL1692 Controller
Document number: DS39008 Rev. 3 - 2 4 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Functional Block Diagram (continued) VCC Management Fault Management UVLO OFF VCC Clamp OTP OVP VDD VREF STOP 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 1.6V AL1692-20C with MOSFET
Document number: DS39008 Rev. 3 - 2 5 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) (Note 4) Symbol Parameter Rating Unit VCC Power Supply Voltage 18 V VSW Voltage on SW Pin (AL1692) (Note 5) 20 V VD Voltage on Drain Pin (AL1692-20C) 600 V IDS Continuous Drain Current TC = +25°C (AL1692-20C) 2 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 SO-8 Power Dissipation (TA = +50°C) (Note 6) 0.96 W SO-7 Power Dissipation (TA = +50°C) (Note 6) 0.8 W JA SO-8 Thermal Resistance (Junction to Ambient) (Note 6) 104 °C/W SO-7 Thermal Resistance (Junction to Ambient) (Note 6) 123 °C/W JC SO-8 Thermal Resistance (Junction to Case) (Note 6) 6.6 °C/W SO-7 Thermal Resistance (Junction to Case) (Note 6) 19 °C/W ESD (Human Body Model) 2,000 V ESD (Machine Model) 200 V Notes: 4. Stresses greater than those listed under Absolute Maximum Ratings can 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 can affect device reliability. All voltages unless otherwise stated are measured with respect to GND. 5. SW pin can withstand pulse voltage up to 25V with duration of 300ns. 6. Device mounted on 1" x 1" FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout. Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Symbol Parameter Min Max Unit TA Ambient Temperature (Note 7) -40 +105 °C Note: 7. The device may operate normally at +125°C ambient temperature under the condition not trigger temperature protection.
Document number: DS39008 Rev. 3 - 2 6 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT 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 — 15.5 — V Standby Current IST Startup Current VCC = VTH (ST)-0.5V Before Startup — 100 — µA ICC (OPR) Operating Current Switching Frequency at 4kHz — 210 — µA Source Driver RDS(ON)LV Internal Low Voltage MOSFET On- State Resistance (Note 8) — — 1 — Ω High Voltage and Super-Junction MOSFET RDS(ON)HV Drain-Source On-State Resistance AL1692-20C — 4 5.5 Ω VDS Drain-Source Breakdown Voltage AL1692-20C 600 — — V IDSS Drain-Source Leakage Current AL1692-20C — — 1 µA RT VRT_REF Reference Voltage of RT Pin — — 0.5 — V Current Sense VCS_CLAMP CS Clamp Voltage — — 1.6 — 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 — 5.4 — µs tOFF_MIN Minimum tOFF (Note 8) — — 4 — µs tOFF_MAX Maximum tOFF — — 290 — µs 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 VCS = 0V — 10 — µA ISINK Amplifier Sink Current VCS = 1.5V — 28 — µA Thermal Foldback and Overtemperature Protection (OTP) TFOLD Thermal Foldback (Note 8) — — +145 — °C — Thermal Shutdown (Notes 8 & 9) — — +160 — °C Notes: 8. These parameters, although guaranteed by design, are not tested in production. 9. The device will latch off when OTP happens, recovered after power cycle and the device won’t operate normally at this temperature.
Document number: DS39008 Rev. 3 - 2 7 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Performance Characteristics (Note 10) 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 Feedback voltage vs. Ambient Temperature Note: 10. These electrical characteristics are tested under DC condition. The ambient temperature is equal to the junction temperature of the devic e. -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 -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 Minimal Operating Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 100 110 120 130 Start-up Current (A) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 150 160 170 180 190 200 210 220 230 240 Operating Current (A) 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 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VFB_OVP (V) Ambient Temperature ( o Minimum Operating Voltage (V) Feedback Voltage vs. Ambient Temperature
Document number: DS39008 Rev. 3 - 2 8 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Functional Description and Application Information Operation The AL1692 is a single stage, single winding, high efficiency, and high power factor dimmable LED driver controller/drivers for triac dimmable LED lamp applications. The AL1692 controller with an external MOSFET can support larger power application up to 25W. The AL1692-20C LED driver with 600V/2A internal MOSFET can suit for both 120VAC and 230VAC application. The AL1692 adopts source-driver technique to decrease the system operating current. It uses a novel method to detect the tOFF time which results in the removal for the need of an auxiliary winding. The AL1692 operates at boundary conduction mode (BCM) which can ease EMI design and achieve high efficiency. High power factor ( HPF) is achieved by using constant on-time mode; coupled with a closed loop of constant current control, the AL1692 achieves good line and load regulation. Startup and Supply Voltage Before startup, the VCC capacitor C4 is charged by the startup resistors (R2, R3) from the high voltage mains. When the startup voltage is reached, the AL1692 starts switching. During normal operation, the VCC supply is provided by s tartup resisters (R2, R3) and the output voltage (V OUT) rectified by one diode (D2). In this way the system can provide VCC supply at low dimming angle. The AL1692 has an internal VCC clamp voltage (typical 15.5V), which is limited by one internal active Zener diode. When VCC voltage drops to below the VOPR (MIN), switching is stop ped. So the device can operate normally when the voltage on VCC pin is between VOPR (MIN) and VCC clamp voltage. Protections Undervoltage Lockout (UVLO) When the voltage on the VCC pin drops to below VOPR (MIN), the IC stops switching. The IC can restart when the vo ltage on VCC exceeds the startup voltage (VTH (ST)). Leading-Edge Blanking (LEB) To prevent false detection of the peak current of the inductor, a blanking time following switch-on is designed. When the internal switch turns on, a short current spike can o ccur because of the capacitive discharge of the voltage over the drain and source. It is disregarded during the LEB time (tON_MIN). Cycle-by-Cycle Overcurrent Protection (OCP) The AL1692 has a built -in peak current detector. It is triggered when the vo ltage on CS pin reaches the peak level VCS_CLAMP. The R5 is connected to the CS pin to sense the current of the inductor. The maximum peak current (IPEAK(MAX)) of the inductor can be calculated as below: CS CLAMP PEAK MAX VI R The detection circuit is activated after the LEB time. When the detection circuit sense s the CS voltage is higher than 1V, the IC will turn off the switching to limit the output current. It automatically provides protection for the maximum LED current during operation. A propagation delay exists between overcurrent detection and actual source-switch off, so the actual peak current is a little higher than the OCP level set by the R5. Overvoltage Protection and Output-Open Protection (OVP) The output voltage is sensed by the FB pin, which provides an overvoltage protection (OVP) function. When the output is open or large transient happens, the output voltage will exceed the rated value (R8, R9). When the voltage excee ds VFB, the over voltage is triggered and the IC will discharge VCC. When the VCC is below the UVLO threshold voltage, IC will restart and the VCC capacitor is charged again by startup resistance. If the overvoltage condition still exists, the system will work in hiccup mode. Output-Short Protection (OSP) When LED is shorted, the device cannot detect the tOFF time, and the device controls the system operation at 4kHz low frequency.
© 2022 Copyright Diodes Incorporated. All Rights Reserved. Figure 1. Thermal Foldback Waveform after the system’s AC source supply has been reset and powered up. IPEAK is the peak current of the inductance. tON is the internal MOSFET on time. tOFF is the freewheel diode D1 conduction time.
1 R5 OFF
VREF is the internal reference, typical 0.4V. R5 is the current sense resistor.
Document number: DS39008 Rev. 3 - 2 10 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Functional Description and Application Information (continued) 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 AL1692 controls the system operating at boundary conduction mode which results in its operating frequency not 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 t ON_MAX by one external resistor R T (R6). And the tON_MAX time has the below equation: 3.3 0.3310 6 REF ON MAX RT REF Ct V uAR Where, VRT_REF is the internal RT pin 0.5V’s reference. CREF is the internal 1.5pF capacitor. Dimming Control The AL1692 is a closed loop control device; the dimming function is realized by tON_MAX limited when dimmer is connected in. When the dimmer is at the largest conduction angle, the device still has the adjustability to control the output current constant before COMP voltage is adjusted to the maximum 4V, so for most of the dimmer, the output current is almost the same with the no dimmer condition at the largest conduction angle. If the conduction angle is decreased, the COMP pin voltage will continue to increase quickly till to the maximum level (typical 4V), the device will output tON_MAX to limit system’s output current. The tON_MAX is set by RT pin connect ed with one resistor, so the dimming depth can be adjusted by RT resistor (R6). Before the AL1692 enters tON_MAX mode, it keeps the output current constant the same as no dimmer condition. When it enters tON_MAX mode, we can get the following equation: I N RMS ON MAX PEAK DIM V Sin tI L
Document number: DS39008 Rev. 3 - 2 12 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT
Ordering Information
20: 2.0A Blank: AL1692 AL1692-X X X–X MOSFET VoltageCurrent Option C: 600V Blank: AL1692 S7: SO-7 S: SO-8 Package Packing 13: Tape & Reel Part Number Part Number Suffix Package Code Package Packing Qty. Carrier AL1692S-13 -13 S SO-8 4000 Tape & Reel AL1692-20CS7-13 -13 S7 SO-7 4000 Tape & Reel Marking Information SO-8 AL1692 (Top View) YY WW X X Logo WW : Week : 01 to 52; 52 YY : Year (ex: 22 = 2022) X X : Internal Code 8 7 6 5 1 2 3 4 represents week 52 and 53 Marking ID SO-7 1692 - ZZZ (Top View) YY WW X X Marking ID 1692-20C for 2.0A/600V Logo WW : Week : 01 to 52; 52 YY : Year (ex: 22 = 2022) X X : Internal Code 7 6 5 1 2 3 4 represents week 52 and 53
Document number: DS39008 Rev. 3 - 2 13 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SO-8 b e E A 9° (All sides) 4°± 3° c Q h 45° R 0.1 D L Seating Plane Gauge Plane SO-8 Dim Min Max Typ A 1.40 1.50 1.45 A1 0.10 0.20 0.15 b 0.30 0.50 0.40 c 0.15 0.25 0.20 D 4.85 4.95 4.90 E 5.90 6.10 6.00 E1 3.80 3.90 3.85 E0 3.85 3.95 3.90 e -- -- 1.27 h - -- 0.35 L 0.62 0.82 0.72 Q 0.60 0.70 0.65 All Dimensions in mm (2) Package Type: SO-7 b e E 9° (All sides) 4°± 3° c Qh 45° R 0.1 D E1a L Seating Plane Gauge Plane SO-7 Dim Min Max Typ A2 1.40 1.50 1.45 A1 0.10 0.20 0.15 b 0.30 0.50 0.40 c 0.15 0.25 0.20 D 4.85 4.95 4.90 E 5.90 6.10 6.00 E1 3.80 3.90 3.85 E1a 3.85 3.95 3.90 e - - 1.27 h - - 0.35 L 0.62 0.82 0.72 Q 0.60 0.70 0.65 All Dimensions in mm
Document number: DS39008 Rev. 3 - 2 14 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SO-8 C X Y Dimensions Value (in mm) C 1.27 X 0.802 X1 4.612 Y 1.505 Y1 6.50 (2) Package Type: SO-7 C X Y Dimensions Value (in mm) C 1.270 X 0.802 X1 4.612 Y 1.505 Y1 6.500 Mechanical Data Moisture Sensitivity: Level 1 per JESD22-A113 Terminals: Finish – Matte Tin Plated Leads, Solderable per M2003 JESD22-B102 Weight SO-8: 0.079 grams (Approximate) SO-7: 0.077 grams (Approximate)
Document number: DS39008 Rev. 3 - 2 15 of 15 www.diodes.com December 2022 © 2022 Copyright Diodes Incorporated. All Rights Reserved. NEW PRODUCT AL1692 NEW PRODUCT 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 fo r 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. 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