AP3118 DIODES
Document overview
- Manufacturer or author: Provided By digicamel.com
- PDF pages: 17
Technical content
Features
Current Mode Control High-Voltage Startup Frequency Fold Back for High Average Efficiency 130k Maximum Frequency for Peak Load Two Levels Timer Control for OLP and SCP Audible Noise Free Green-Mode Control Embedded VCC LDO to Guarantee Wide Range VCC_IN Voltage Constant Output Current in Output Short Situation Low VCC Charge Current Reduces Standby Power in Output Short Situation Internal Slope Compensation Soft Start During Startup Process VCC Maintain Mode X-CAP Discharge Function Precise Secondary Side OVP and UVP Programmable External OTP Brown-Out Protection Overload Protection FOCP and SSCP Protection Useful Pin Fault Protection SSOP-9 (Type CJ) is Available Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) SSOP-9 (Type CJ)
Applications
Switching AC-DC Adapter/Charger Open Frame Switching Power Supply 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: DS39915 Rev. 5 - 2 2 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Typical Applications Circuit AC R11 R4 R8C6 GND GATE FB SENSE VCC-IN AP3118 NTC1 R10 DEM D1 D4 C2 R24 D2 D3 HV VCC CTRL RT CX D8 D9 R25 R12 C10R19 9 CY1 C11 Vo CC1 GND USB1 R18 R15 C 4 D11 R28 R17 R16 USB PD Controller VCC GATE CATH CC1 VFB VDD VSS IS+ IS- IFB VBUS D12 R20R22 R21 R23 R 26 R27 C12 C13 C14 C15 C16 C17 C18 C22 C21 C R14 C19 C20 R13 D11 D10 Pin Descriptions Pin Name Function
1 CTRL Programmable External Protection
2 FB Feedback. Directly Connected to the Opto-coupler
3 DEM Sample VOUT to Realize SOVP and SUVP Protection
4 VCC_IN Wide Range Input Supply Voltage to Produce VCC
5 GND Signal Ground
6 GATE Gate Driver Output
7 VCC Supply Voltage of Driver and Control Circuits
8 SENSE Sense the Primary Current
9 HV High Voltage Input. Sense Line Voltage and Provide Startup Current to VCC
Document number: DS39915 Rev. 5 - 2 3 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Functional Block Diagram GND SENSE 250ns LEB Soft Driver 12V OSC with Frequency Jitter 7.3V 7.7V VCC_OVP OLP VCC 35V 33V VCC_OVP UVLO 14.8V 6.7V Internal Bias Auto Recovery Protection AP3118 FB R PWM 1.4V Vburst CTRL_H Latch-off Protection 120ms Debounce OLP FOCP CTRL_L Hold SOVP SSCP SS SS VDD Io Soft Start 1.25V FOCP 0.1V QD CLK RB DFF 3.8ms Delay SSCP OTP VCC VDD OTP 0.5V 4.5V SOVP SUVP DEM 75mV Line sense tONS LOVP Brownout SUVP 15V HV VCC UVLO 630V LOVP BNO BNO LOVP X_discharge Discharge Discharge CC 105VDC 97VDC1.7mA Hold Hold CCRef CCRef tONS PWM Sense FOCP 4.2V 30ms Debounce SCP CTRL 4.4V 1.0V 10K CTRL_H CTRL_L VDD SCP Peak Load PWM CCcal CCcal VCC_IN 4 9 8 3 GATE6 100mA
Document number: DS39915 Rev. 5 - 2 4 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VHV HV Pin Input Voltage 700 V VCC_IN LDO Supply Voltage 100 V VCC Power Supply Voltage 40 V IO Gate Output Current 500 mA VFB, VSENSE, VCTRL， VDEM Input Voltage to FB, SENSE, CTRL, DEM -0.3 to 7 V θJA Thermal Resistance (Junction to Ambient) 165 °C/W PD Power Dissipation at TA < +25°C 550 mW TJ Operating Junction Temperature -40 to +150 °C TSTG Storage Temperature Range +150 °C ESD Human Body Model (Except HV Pin and VCC_IN Pin (Note 5)) 2,000 V Machine Model (Except HV Pin and VCC_IN Pin (Note 5)) 200 V Notes: 4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stres s ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Condi tions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. 5. ESD sensitive pins with HV device. Recommended Operating Conditions Symbol Parameter Min Max Unit VCC_IN LDO Supply Input Voltage 10 60 V VCC Power Supply Voltage 10 28 V TOP Operating Temperature Range -40 +85 °C
Document number: DS39915 Rev. 5 - 2 5 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Electrical Characteristics (@TA = -40 to +85° C, VCC = 16V, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit Power Supply Voltage (VCC Pin) IST Startup Current – – 1.5 15 μA ICC Operating Supply Current VFB =0V, VCC=18V 0.25 0.45 0.65 mA VFB =3V,CL =1nF,VCC =18V 1.5 1.9 2.3 VST Turn-On Threshold Voltage – 13.8 14.8 15.8 V VCC-UVLO VCC UVLO Voltage – 6.1 6.7 7.1 V VCC-OVP VCC OVP Threshold Voltage – 32 33 34 V VDE-LATCH De-Latch VCC Voltage – 3 4.4 6 V VHOLD-ENTRY VCC Hold Entry Point – 7.1 7.3 7.5 V VHOLD-HYS Hysteresis for VCC Hold – – 0.4 – V HV Section(HV Pin) ICHARGE-L Charge Current VCC = 0V, VHV = 100V 0.1 0.23 0.35 mA ICHARGE-H VCC = 6V, VHV = 100V 1.4 1.8 2.3 mA ICHARGE-FAULT Charge Current if Fault Occurs VCC = 6V, VHV = 100V 60 90 120 µA VBR-IN Brown In Voltage – 100 105 110 V VBR-OUT Brown Out Voltage – - 97 - V tBR-IN Delay of Brown In (Note 8) – – 100 – µs tBR-OUT Delay of Brown Out (Note 8) – – 50 – ms VLOVP Line OVP (Note 8) – - 630 – V IDISCH-X X-CAP Discharge Current – 1.3 1.7 2.1 mA PWM Section/Oscillator Section DMAX1 Maximum Duty Cycle fOSC = 65kHz 70 75 80 % DMAX2 Maximum Duty Cycle fOSC = 120kHz 60 65 70 % fs Oscillation Frequency – 60 65 70 kHz fOSC-GREEN Green Mode Frequency – 20 – 30 kHz fOSC-PEAK Peak Load Frequency – 110 120 130 kHz δFREQUECY-TEMP Frequency Temperature Stability -20° C to +125° C – – 5 % δFREQUECY-VOL Frequency Voltage Stability VCC=12V to 30V – – 3 % fOSC-JITTER Frequency Dithering – ±4 ±6 ±8 % tDITHER Frequency Dithering Period – – 4 – ms Current Sense Section (SENSE Pin) Vref_CC Reference for Primary Current Control – 2.45 2.5 2.55 V
Document number: DS39915 Rev. 5 - 2 6 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Electrical Characteristics (@TA = -40 to +85° C, VCC = 16V, unless otherwise specified.) (Cont.) Symbol Parameter Condition Min Typ Max Unit tDELAY-CS Delay to Output (Note 6) – – 100 – ns VTH-FOCP FOCP Voltage – – 1.25 – V VTH-SSCP SSCP Voltage – 80 100 120 mV tLEB LEB Time of SENSE – 200 250 300 ns tSOFT-ST Soft-Start Time – 3 4 8 ms Feedback Input Section (FB Pin) KFB-CS The Ratio of FB Input Voltage to Current Sense Voltage – 3.5 4 4.5 V/V RFB Input Impedance – 19 25 31 kΩ IFB-SOURCE Source Current VFB = 0V 0.1 0.2 0.3 mA VFB-PEAK-START Start of Peak Frequency Rising – – 3.1 – V VFB-PEAK-END End of Peak Frequency Rising – – 3.5 – V VFB-FOLD-START Start of Frequency Foldback – – 1.7 – V VFB-FOLD-END End of Frequency Foldback – – 1.3 – V VBURST Input Voltage for Zero Duty VDEM>2V 0.5 0.66 0.8 V VDEM<2V 0.3 0.46 0.6 V VBURST-HYS Hysteresis for Burst Mode – – 130 – mV tDEB-OLP OLP Debounce Time – – 120 – ms VFB-SC Feedback Voltage when SCP is Activated – – 4.2 – V tDEB-SCP SCP Debounce Time – – 30 – ms Output Section (GATE Pin) VGATE-L Output Low-Level Voltage IO = 20mA, VCC = 12V – – 1 V VGATE-H1 Output High-Level Voltage IO = 20mA, VCC = 12V 8 – – V VGATE-H2 Output High-Level Voltage IO = 15mA, VCC = 7V 6 6.4 7 V VGATE-CLP Output Clamping Voltage VCC = 20V 9.5 10.5 11 V tGATE-RISE Rising Time CL = 1nF, VCC = 13V – 150 300 ns tGATE-FALL Falling Time CL = 1nF, VCC = 13V – 50 100 ns De-magnetization Section (DEM Pin) VTH-DEM De-Magnetization Voltage(Note 8) – – 75 – mV VCLP-L Clamping Voltage IDEM =- 200µ A -50 -5 – mV VCLP-H IDEM = 1mA 5 5.8 6.5 V VTH-SOVP-L SOVP Threshold for Startup – 1.05 1.1 1.15 V VTH-SOVP-H SOVP Threshold for Steady State – 4.3 4.5 4.7 V tDEB-SOVP SOVP Debounce Time – – 7 – Cycle VTH-SUVP-L SUVP Threshold for Hiccup – 0.48 0.5 0.52 V tDEB-SUVP SUVP Debounce Time – – 7 – Cycle Note: 6. Cycle-by-Cycle limit delay time contains OCP comparator delay time and driver delay time, Guaranteed by design.
Document number: DS39915 Rev. 5 - 2 7 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Electrical Characteristics (@TA = -40 to +85° C, VCC = 16V, unless otherwise specified.) (Cont.) Symbol Parameter Condition Min Typ Max Unit tBLANK-SUVP SUVP Blank Time after Startup – 22 27 32 ms tSAMPLE Sample Delay Time (Note 8) – – 2 – µs LDO Section ( VCC_IN Pin/VCC Pin ) VCC LDO Regulated Voltage (Power Supply Voltage) VCC open, VCC_IN =10V 9.4 9.8 9.9 V VCC open, VCC_IN =40V 14 15 16 V ILDO Operating Current VCC=12V, VCC_IN =40V -10 -8.5 -7 mA Protection Section (CTRL Pin) ICTRL-SOURCE Source Current – -110 -100 -90 μA VTH-CTRL-L Low Threshold – 0.96 1 1.04 V tCTRL-BLANK Blank Time when VCTRL is Low – – 30 – ms VTH-CTRL-H High Threshold – 2.85 3 3.15 V VCTRL-CLP Clamp Voltage (Note 7) ICTRL= -2mA 4.0 4.4 4.8 V tDELAY-HICC Delay of Hiccup Protection (Note 8) SUVP, SOVP, Line OVP, VCC OVP,FOCP,SSCP, CTRL Pin Protection – 7 – Cycles Internal OTP Section OTP OTP Threshold – – +150 – °C THYS OTP Recovery Hysteresis – – +25 – °C tDEB-OTP OTP Debounce Time – – 7 – Cycle Notes: 7. The sourcing current of CTRL pin must be limited below 5mA. Otherwise it may cause permanent damage to the device. 8. Guaranteed by design.
Document number: DS39915 Rev. 5 - 2 8 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Performance Characteristics Startup Voltage vs. Ambient Temperature Shutdown Voltage vs. Ambient Temperature Oscillation frequency vs. Ambient Temperature FB Pin Input Impedance vs. Ambient Temperature ILDO vs. Ambient Temperature VBR-IN vs. Ambient Temperature -40 -20 0 20 40 60 80 100 6.0 6.2 6.4 6.6 6.8 7.0 VCC-UVLO （V ） Ambient Temperature ( o -40 -20 0 20 40 60 80 100 VST (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 10060 Oscillation Frequency (kHz) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 FB Pin Input Impedance (k) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 100 105 110 VBR-IN (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 ILDO (mA) Ambient Temperature ( o
Document number: DS39915 Rev. 5 - 2 9 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Performance Characteristics (Cont.) VBR-OUT vs. Ambient Temperature VTH-SOVP-H vs. Ambient Temperature VTH-SUVP-L vs. Ambient Temperature -40 -20 0 20 40 60 80 10080 100 VBR-OUT (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 0.1 0.2 0.3 0.4 0.5 0.6 VTH-SUVP-L (V) Ambient Temperature ( o -40 -20 0 20 40 60 80 100 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 VTH-SOVP-H (V) Ambient Temperature ( o
Document number: DS39915 Rev. 5 - 2 13 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Operation Principle Description (Cont.) Built-In Slope Compensation It is well known that a continuous current mode SMPS may become unstable when the duty cycle exceeds 50%. The built-in slope compensation in the AP3118 can keep the system stable. Built-In VCC LDO The AP3118 integrates a VCC LDO circuitry, the LDO regulates the wide range VCC_IN which is rectified from auxiliary winding to an acceptable value. It makes the AP3118 a good choice in wide range output voltage application. Brown In/Out Protection To avoid potential high -current stress at low line voltage, the AP3118 introduces a reliable brownout protection. The AC line voltage is detected through HV Pin, A pair of high -voltage diodes are connected to the AC line which will rectify the AC input voltage to a double -frequency positive voltage referring to GND, a 20kΩ resistor is recommended to be added to improve the surge immunity. When the voltage across HV pin is higher than VBR-IN for about 100 µs of t BR-IN and VCC reaches VST, the GATE pin will output drive signals and the system starts to work. If the HV pin voltage falls below VBR-OUT and lasts for 50ms of tBR-OUT, the GATE pin will turn off and the system will shut down until the line voltage rises over its brown-in voltage again. SOVP/SUVP Protection The AP3118 provides output OVP and UVP protection function. The auxiliary winding voltage during secondary rectifier conducting period reflects the output voltage . A voltage divide network is connected to the auxiliary winding and DEM Pin, the DEM Pin will detect the equivalent output voltage with a delay of t SAMPLE from the falling edge of GATE driver signal, as shown in Figure 8. The detected voltage will be compa red to the SOVP and SUVP threshold voltage VTH-SOVP and VTH-SUVP. If the SOVP or SUVP threshold is reached continuously by 7 switching cycles, the SOVP or SUVP protection will be triggered , the AP3118 will shut down and the system will restart when the V CC voltage falls below the UVLO voltage. To prevent from false -trigger of SUVP during start up process, a blank time of t BLANK-SUVP is set during which the SUVP protection function is ignored. Two levels of OCP Control The AP3118 set s two levels OCP protection thresholds to distinguish overload protection and short circuit protection. When overload conditio n occurs ( ), the internal timer begins to operate. After 120ms, IC enters into protection status. For short circuit protection (FB>4.2V), the internal timer is set to 30ms. Externally Triggered Protection The AP3118 reserves flexible protection mode for power design. The CTRL Pin can achieve external programmable protection. A high threshold of VTH-CTRL-H is set for any over voltage protection, if the CTRL Pin voltage is higher than the threshold for 7 switching cycles, the CTRL -High protection will be triggered. A low threshold of V TH-CTRL-L is usually used for external over temperature protection. To rea lize the external OTP, a proper value NTC should be connected from the CTRL Pin to the ground. An inner current of 100µA flows through the NTC from the CTRL pin. If the CTRL Pin voltage is low er than the VTH -CTRL-L for 32ms duration at least, the CTRL -Low protection will be triggered. Whenever the protection is triggered, the system will stop the output drive signal and will restart after the VCC voltage falling below the UVLO voltage. System Protection LOVP, FOCP, SSCP, VCC OVP, OTP The AP3118 provides versatile protection to ensure the reliability of the power system. LOVP achieves line voltage overvoltage protection, if the detected AC line voltage is higher than V LOVP for 7 switching cycles, the LOVP protection will be triggered. FOCP protection is an ultra -fast short- current protection which is helpful to avoid catastrophic damage of the system when the secondary rectifier is short. The pri mary peak current will be monitored by SENSE pin thro ugh a primary sense resistor, whenever the sampled voltage reaches the threshold of V TH-FOCP for 7 switching cycles continuously, the FOCP protection will be active to shut down the switching pulse. SSCP might be triggered at ultra -low line voltage condition or other failure condition that short the SENSE pin to ground. The SSCP module senses the voltage across the primar y sense resistor with a delay of 4µ s after the rising edge of primary GATE signal, this sensed signal is compared with VTH-SSCP. If it is lower than V TH-SSCP for 7 switching cycles, the SSCP protection will be triggered and the drive signal will be disabled . All these protections described above will restart the system when the V CC voltage falls below UVLO. Alt hough t he external OTP can be easily implemented through CTRL pin , the AP3118 still reserves the inner OTP with a hysteresis for any necessary use.
Document number: DS39915 Rev. 5 - 2 14 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Operation Principle Description (Cont.) VCC Maintain Mode During light-load or transient-load condition, VFB will drop and be lower than VBURST, thus the PWM drive signal will be stopped, and there is no energy transferring to the output . Therefore, the IC VCC supply voltage may decrease to the UVLO threshold voltage and system may enter the unexpected restart mode. To avoid this, the AP3118 holds a so-called VCC maintain mode which can supply energy to VCC. When VCC decreases to a setting threshold as VHOLD-ENTRY, the VCC maintain mode will be awaked and a charging current of ICHARGE-H will flow to the VCC Pin. With VCC maintain mode, t he VCC is not easy to touch the shutdown threshold during the sta rtup process and transient load condition. This will also simplify the system design. The min imum V CC voltage is suggested to be designed a little higher than V CC maintain threshold thus can achieve the best balance between the power loss and step load performance. Leading-Edge Blanking Time A narrow spike on the leading edge of the current waveform can usually be observed when the power MOSFET is turned on. A 250ns leading - edge blank is built -in to prevent the false -trigger caused by the turn -on spike. During this period, the current limit comparator and the PWM comparator are disabled and the gate driver cannot be switched off. At the time of turning -off the MOSFET, a negative undershoot (maybe larger than -0.3V) can occur on the SENSE pin. So it is strongly recommended to add a small RC filter or at least connect a resistor “R” on this pin to protect the IC (Shown as Figure 8). SENSE GATE Large undershoot (more than -0.3V) may damage the SENSE pin R C Necessary Figure 8
Document number: DS39915 Rev. 5 - 2 15 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT
Ordering Information
TR : Tape & Reel G1 : RoHS Compliant and Green Product Name RoHS/GreenPackage GS:SSOP-9 (Type CJ) Package Temperature Range Part Number Marking ID Packing SSOP-9 (Type CJ) -40°C to +85°C AP3118GSTR-G1 3118GS-G1 4,000/Tape & Reel Marking Information 3118GS-G1 (Top View) YY WW X X Marking ID Logo WW : Week : 01~52; 52 YY : Year : 17,18,19 ~ X X : Internal Code 1 2 3 4 represents 52 and 53 week 9 8 7 6
Document number: DS39915 Rev. 5 - 2 16 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT Package Outline Dimensions (All dimensions in mm.) Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SSOP-9 (Type CJ) SSOP-9 (Type CJ) Dim Min Max Typ A 1.35 1.75 -- A1 0.10 0.25 -- A2 1.350 1.550 -- b 0.270 0.430 -- c 0.170 0.258 -- D 4.70 5.10 -- E 5.80 6.20 -- E1 3.80 4.00 -- e -- -- 1.00 L 0.40 1.27 -- θ 0 8 -- All Dimensions in mm Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: SSOP-9 (Type CJ) Dimensions Value (in mm) C 1.00 G 3.40 X 0.60 Y 2.00 Y1 7.40 be E A D A1c L XC Y1G Y
Document number: DS39915 Rev. 5 - 2 17 of 17 www.diodes.com July 2018 © Diodes Incorporated AP3118 NEW PRODUCT 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 o ther changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liab ility 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 this document or produ cts 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 mu ltiple 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 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 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 device s 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 pr ovided by Diodes Incorporated. Further, Cus tomers 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 © 2018, Diodes Incorporated www.diodes.com