AP1684
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 14
Technical content
Features
Low Start-up Current High PF and Low THD (PF > 0.9, THD < 30%) High Efficiency up to 92% BCM Mode Output Current Accuracy on IC Level: ±2% Tight LED Open Voltage Valley-mode Switching to Minimize the Transition Loss BJT Transistor Driver Dynamic Base Driver Control Open-load and Reload Detection Internal Protections: Under Voltage Lock Out (UVLO) Leading-edge Blanking (LEB) Output Short Protection Output Open Protection Over Temperature Protection Low System Cost SO-8 Package 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-Q100/101/200, 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 NC RI RM CS FB GND OUT VCC (SO-8)
Applications
LED Bulb Lamp LED Down Light GU10/E27 Other Non-dimmable LED Lighting 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 + C l) and <1000ppm antimony compounds. NOT RECOMMENDED FOR NEW DESIGN USE AP1694AS-13
Document number: DS36547 Rev. 4 - 3 2 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Typical Applications Circuit OUT VCC FB OUT CS GND C 3 R4D1 AC Input F 1 VR1 DB1 RI RM AP1684 Pin Descriptions Pin Number Pin Name Function
1 NC No connection
2 RI The initial Tonp tuning resistor
3 RM Set the operating mode
4 CS Primary current sensing
5 FB The feedback voltage sensing from the auxiliary winding
6 GND Ground
7 OUT Gate driver output
8 VCC Supply voltage of gate driver and control circuits of the IC
Document number: DS36547 Rev. 4 - 3 3 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Functional Block Diagram Regulator & Bias Tons Detector Tons Power_EN Driver FB VCC OUT PFM R S Q Vref CC_CTRL TONP_CTRL CS GND Vdd Protection & Latch PRO CS_OCP FB_CV FB_OVP VCC_OVP Logic Set Initial Tonp & Set the IC Working in BCMRM RI Constant Turn-on Time Generation
Document number: DS36547 Rev. 4 - 3 4 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Absolute Maximum Ratings (@TA = +25° C, unless otherwise specified. Note 4) Symbol Parameter Rating Unit VCC Power Supply Voltage -0.3 to 35 V IOUT Driver Output Current 150 mA VCS Voltage at CS to GND -0.3 to +7 V VFB FB Input Voltage -40 to +10 V TJ Operating Junction Temperature -40 to +150 °C TSTG Storage Temperature -65 to +150 °C TLEAD Lead Temperature (Soldering, 10 sec) +300 °C PD Power Dissipation (TA = +50°C) 0.65 W JA Thermal Resistance (Junction to Ambient) 160 °C/W — ESD (Human Body Model) 2000 V — ESD (Charged-device Model) ± 1000 V Note 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 may affect device reliability. Recommended Operating Conditions Symbol Parameter Min Max Unit VCC Power Supply Voltage 7 25 V TA Ambient Temperature -40 +105 °C
Document number: DS36547 Rev. 4 - 3 5 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Electrical Characteristics (@TA = +25° C, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit UVLO Section VTH (ST) Start-up Threshold — 18 19 20 V VOPR (Min) Minimum Operating Voltage After turn on 5.5 6.5 7.5 V VCC_OVP VCC OVP Voltage — 30 32 34 V — VCC Delatch Voltage (Note 5) — 3 4 5 V Standby Current Section IST Start-up Current VCC = VTH (ST)-0.5V, Before start up — — 20 μA ICC (OPR) Operating Current Static — 900 1300 μA Drive Output Section IOUT Output Current (Note 5) VCS_PEAK = 1V — — 60 mA VOS UVLO Saturation Voltage VCC = 0 to VCC-ON, ISINK = 10mA — — 1.1 V Current Sense Section VCS_REF Current Sense Reference — — 1 — V VCS_CLAMP Current Sense Reference Clamp — 1.2 1.4 — V tONP_MIN Minimum tONP — 700 — 1000 ns tD(H-L) Delay to Output (Note 5) — 50 150 250 ns Feedback Input Section IFB Feedback Pin Input Leakage Current VFB = 2V — — 4 μA VFB_CV FB CV Threshold — 3.8 4 4.2 V VFB_OVP FB OVP Threshold — 4.5 6 7.5 V Output Current — System Output Current on Final Test Board — — — ±2 % Over Temperature Protection Section — Shutdown Temperature (Note 5) — +150 — — °C — Temperature Hysteresis (Note 5) — — +20 — °C Note 5: These parameters, although guaranteed by design, are not 100% tested in production.
Document number: DS36547 Rev. 4 - 3 6 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Performance Characteristics Supply Current vs. Supply Voltage CV Threshold vs. Supply Voltage Start-up Voltage vs. Ambient Temperature Minimal Operating Voltage vs. Ambient Temperature Start-up Current vs. Ambient Temperature Operating Current vs. Ambient Temperature 6 8 10 12 14 16 18 20 22 24 26 28 30 3.6 3.7 3.8 3.9 4.0 4.1 4.2 CV Threshold (V) Supply Voltage (V) -40 -20 0 20 40 60 80 100 120 16.8 17.2 17.6 18.0 18.4 18.8 19.2 Start-up Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 Minimal Operating Voltage (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 0.0 0.1 0.2 0.3 0.4 0.5 Start-up Current (A) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 750 800 850 900 950 1000 Operating Current (A) Ambient Temperature ( o 0 5 10 15 20 25 30 100 200 300 400 500 600 700 800 900 1000 Supply Current (A) Supply Voltage (V)
Document number: DS36547 Rev. 4 - 3 7 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Performance Characteristics (continued) CV Threshold vs. Ambient Temperature FB Leakage Current vs. Ambient Temperature -40 -20 0 20 40 60 80 100 120 3.00 3.25 3.50 3.75 4.00 4.25 4.50 CV Threshold (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 120 1.00 1.25 1.50 1.75 2.00 2.25 FB Leakage Current (A) Ambient Temperature ( o
Document number: DS36547 Rev. 4 - 3 8 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684
Application Information
The AP1684 is designed for single voltage application, and it features high power factor correction (PFC), low total harmonic distortion (THD), low BOM cost and good EMI performance. The device can be widely used in non -dimmable LED application such as GU10, bulb lamps, down lamp, etc. The AP1684 adopts constant on time control method within one AC cycle to achieve the high power factor and low THD. The control scheme is very simple, the power factor correction effectiveness is obvious, and the constant current control is also good enough. OUT VCC FB OUT CS GND C 3 R4D1 AC Input F 1 VR1 DB1 RI RM AP1684 Figure 1. Typical Application Circuit Vcs_ref is the reference of the current sense, and the typical value is 1V. K is the current modification coefficient, and the value of k is approximate to be 0.7. Vin_rms is the RMS value of the input voltage.
Ae is the core effective area. Bm is the maximum magnetic flux density. Vcc is the power supply voltage for IC from auxiliary winding. Vd is the voltage drop of the freewheel diode. the appropriate initial on time should be guaranteed. And initial on time is determined by resister R1 shown in Figure 1. The system operation mode is determined by R2, to guarantee the system working at BCM mode, resistance R2 is generally selected as R2≤R1. reflected by the auxiliary winding of the buck transformer. The voltage is sensed by the FB pin. Figure 2. Valley on Control
new operating cycle. In this way we can realize valley on function. Figure 3. OVP Circuit When the output is shorted, the output voltage will be clamped at 0. At this condition, VCC will drop down without auxiliary winding for power supply. output short condition still exists, the system will operate in hiccup mode. ambient temperature is less than +150° C. recommended application is given in the table below. system needs to be adjusted slightly, please refer to the table below and adjust the value of the related component.
Document number: DS36547 Rev. 4 - 3 11 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684
Ordering Information
AP1684 X XX – XX PackingPackageProduct Name TR : Tape & ReelM : SO-8 G1 : RoHS Compliant and Green RoHS/Green Package Temperature Range Part Number Marking ID Packing SO-8 -40°C to +105°C AP1684MTR-G1 1684M-G1 4000/13”Tape & Reel Marking Information (Top View) 1684 M-G1 YWWAXX First and Second Lines: Logo and Marking ID Third Line: Date Code Y: Year WW: Work Week of Molding A: Assembly House Code XX: 7th and 8th Digits of Batch No.
Document number: DS36547 Rev. 4 - 3 12 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Package Outline Dimensions (All dimensions in mm(inch).) Please see http://www.diodes.com/package-outlines.html for the latest version. (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: DS36547 Rev. 4 - 3 13 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. (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: DS36547 Rev. 4 - 3 14 of 14 www.diodes.com June 2020 © Diodes Incorporated AP1684 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). 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. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license unde r its patent or trademark rights, nor the rights of others. Any Customer or user of th is document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diod es 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, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t 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. Product name s 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 into 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 devices or systems witho ut 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 perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant 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 life support d evices 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 -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated 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 © 2020, Diodes Incorporated www.diodes.com