AP3783 PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER Description Pin Assignments The AP3783 is a high performance AC/DC power supply controller for battery charger and adapter applications. The controller regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). (Top View) Pin 1 Mark The AP3783 provides accurate constant voltage (CV), constant current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need of loop compensation circuitry while maintaining stability. The AP3783 provides valley turn-on function, operating frequency Jitter function (about 5.5% frequency change every 256μs) from light to full load range and 3-segment drive current to improve the power supply EMI performance. The AP3783 also has built-in fixed cable voltage drop compensation (10%, 7% and 4% of nominal system output voltage to meet various cables with different length and gauge) and adjustable line voltage compensation. The AP3783 is packaged in SOT26. Applications Adapters/Chargers LED Lighting Standby and Auxiliary Power Supplies 1 6 CPC GND 2 5 DRI VCC 3 4 FB SOT26 Features Notes: CS Less than 75mW Standby Power Consumption Meet Efficiency Requirement of COC Trier2 Valley Turn-on to Reduce Switching Loss and Improve EMI Piece-wise Frequency Reduction to Enhance Conversion Efficiency and Suppress Audio Noise Over Voltage Protection (OVP) Over Temperature Protection (OTP) Short Circuit Protection (SCP) with Hiccup 3-Segment Drive Current for Radiative EMI Suppression Operating Frequency Jitter Function for Conductive EMI Suppression Drive MOSFET for 5W to 30W Battery Charger/Adapter Applications SOT26 SMD Package Comply with Level 3 of IPC/JEDEC J-STD033A Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) 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. AP3783 Document number: DS37429 Rev. 6 - 2 1 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Typical Applications Circuit C2 FR1 T1 DIN LIN RST1 C1 CIN1 Ds R1 Np Ns + + R2 D1 RST2 CIN2 Da R0 + COUT2 R DUMMY 12V/1.5A 5V/2A Ra + + COUT1 Na CVCC U1 1 2 3 CCPC CS CPC 6 GND DRI VCC FB 5 4 CY1 Q1 Dg RFB1 Rg AP3783 RFB2 RCS Pin Descriptions Pin Number Pin Name Function The CS is the current sense pin of the IC. The IC will turn off the power MOSFET according to the voltage on the CS pin 1 CS 2 GND The ground of the controller 3 VCC The VCC pin supplies the power for the IC. In order to get the correct operation of the IC, a capacitor with low ESR should be placed as close as possible to the VCC pin 4 FB The CV and CC regulation are realized based on the voltage sampling of this pin 5 DRI Output pin to drive external MOSFET 6 CPC A capacitor about 50nF should be connected to this pin. The voltage of CPC pin is linear to load of the system and it is used for the functions of cable voltage drop compensation and audio noise suppression AP3783 Document number: DS37429 Rev. 6 - 2 2 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Functional Block Diagram VCC 3 OVP OCkp Output short OTP tOSC 0.05V FB COMP 4 Regulator & Bias OSC tONS Detector PFM tONS UVLO 2 Pro GND VLOAD UV UV PFM Dynamic Response Dyn CV_ctrl Valley ON Detect ON Constant Voltage Control Cable compensation VFB_REF R Q S VCS_D/L/M/H CS 5 Driver DRI tOSC VLOAD Line Comp. Detect pulse Peak Current Control LEB Frequency Dither VCSN Select Shutdown Pre_Shutdown 1 VLOAD tONS UV Detect ON CC_CTRL Constant Current Control R Q S VCS_D/L/M/H CPC VLOAD 6 CPC AP3783 Document number: DS37429 Rev. 6 - 2 3 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Absolute Maximum Ratings (Note 4) Symbol VCC VCS, VCPC Parameter Rating Unit Supply Voltage -0.3 to 35 V Voltage on CS, CPC Pin -0.3 to 7 V -0.4 to 10 V Internally Limited A Operating Junction Temperature -40 to +150 °C TSTG Storage Temperature -65 to +150 °C TLEAD Lead Temperature (Soldering, 10 sec) +300 °C Thermal Resistance (Junction to Ambient) 200 °C/W ESD (Human Body Model) 6000 V ESD (Charged Device Model) 400 V VFB ISOURCE TJ θJA FB Input Voltage Source Current from OUT Pin ESD 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. Electrical Characteristics (@VCC =15V, TA = +25°C, unless otherwise specified.) Symbol Parameters Conditions Min Typ Max Unit STARTUP AND UVLO SECTION Startup Threshold – 13 15.5 18 V Minimal Operating Voltage – 6 6.8 7.6 V Startup Current VCC = VTH_ST - 1V before startup 0 0.2 0.6 Operating Current Static current @ no load 300 450 600 Gate Voltage – 12 13 14 V ISOURCE_L Low Driver Source Current – 17.5 20 22.5 mA ISOURCE_H High Driver Source Current – 100 110 120 mA High/Low Driver Source Current Threshold Voltage – 6 6.5 7 V Sink Resistance – 5.5 6.5 7.5 Ω VTH_ST VOPR(MIN) STANDBY CURRENT SECTION IST ICC_OPR μA DRIVING OUTPUT SECTION VGATE VTH RSINK AP3783 Document number: DS37429 Rev. 6 - 2 4 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Electrical Characteristics (Cont.) (@VCC = 15V, TA = +25°C, unless otherwise specified.) Symbol Parameters Conditions Min Typ Max Unit – – 60 kHz 691 768 845 μs 5.2 5.8 6.4 μs 4.3 4.8 5.3 μs 2.7 3 3.3 μs 1.5 1.7 1.9 μs OPERATING FREQUENCY SECTION fS(MAX) tOFF(MAX) The Maximum Operating Frequency IO(MAX) (Note 5) Maximum Off Time tSAMPLE_H 57% to 100% IO(MAX) tSAMPLE_M Sample Time tSAMPLE_L tSAMPLE_D 34% to 57% IO(MAX) (Note 6) 5.5% to 34% IO(MAX) (Note 6) 0% to 5.5% IO(MAX) (Note 6) FREQUENCY JITTER SECTION ΔVCS/VCS fMOD VCS Modulation 5.5% load to 100% IO(MAX) 4.5 5 5.5 % VCS Modulation Frequency 5.5% load to 100% IO(MAX) 3.6 4 4.4 kHz CURRENT SENSE SECTION VCS_H Peak Current Sense Threshold Voltage 57% to 100% IO(MAX) 828 900 972 mV VCS_M As Above 34% to 57% IO(MAX)(Note 6) 690 750 810 mV 414 450 486 mV 230 250 270 mV 5.5% to 34% IO(MAX) (Note 6) 0% to 5.5% IO(MAX) (Note 6) VCS_L As Above VCS_D As Above RLINE Built-in Line Compensation Resistor (Note 7) 245 260 275 Ω Leading Edge Blanking VCS (Note 6) 495 550 605 ns tLEB CONSTANT VOLTAGE SECTION VFB Feedback Voltage Closed loop test of VOUT 3.95 4.01 4.07 V RFB FB Pin Input Resistance VFB=4V 560 700 840 kΩ VCABLE /VOUT% Cable Compensation Ratio AP3783A 6 7 8 % AP3783B 3 4 5 % AP3783C 9 10 11 % VFB = 3.5V 0.47 0.5 0.53 – From the end of tONS 14.4 16 17.6 μs – 3.61 3.68 3.75 V CONSTANT CURRENT SECTION tONS/tSW Secondary Winding Conduction Duty VALLEY-ON SECTION tVAL-ON Valid Off Time of Valley-on DYNAMIC SECTION VUV_H Under Voltage of FB Pin for VCS_H PROTECTION FUNCTION SECTION VFB(OVP) Over Voltage Protection at FB Pin – 7.1 7.5 7.9 V VCC(OVP) Over Voltage Protection at VCC Pin – 28 30 32 V tONP(MAX) Maximum Turn-on Time – 13.5 16 18.5 μs VFB(SCP) Short Circuit Protection VFB @ Hiccup 2.45 2.6 2.75 V tSCP Maximum Time under VFB(SCP) – 115 128 141 ms TOTP Shutdown Temperature – +144 +160 +176 °C THYS Temperature Hysteresis – +36 +40 +44 °C Notes: 5. The output constant-current design value, generally set to 110% to 120% of full load. 6. Guaranteed by Design. R LINE 7. Line compensation voltage on CS reference: Δ VCS _ REF 0.438 VAUX R FB1 R LINE AP3783 Document number: DS37429 Rev. 6 - 2 5 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Performance Characteristics Start-up Voltage vs. Ambient Temperature Start-up Current vs. Ambient Temperature 17.0 1.0 16.5 0.8 Start-up Current (A) Start-up Voltage (V) 16.0 15.5 15.0 14.5 14.0 0.6 0.4 0.2 13.5 13.0 -40 -20 0 20 40 60 80 100 120 0.0 -40 140 -20 0 20 o 40 60 80 100 120 140 o Ambient Temperature ( C) Ambient Temperature ( C) Minimal Operating Voltage vs. Ambient Temperature Operating Current vs. Ambient Temperature 500 8 450 Operating Current (A) Minimun Operating Voltage (V) 7 6 5 4 400 350 300 250 3 -40 -20 0 20 40 60 80 100 120 200 -40 140 -20 0 20 o 40 60 80 100 120 140 o Ambient Temperature ( C) Ambient Temperature ( C) Sink Resistance vs. Ambient Temperature Sample Time vs. Ambient Temperature 7 14 12 6 Sample Time (s) Sink Resistance () 10 8 6 4 5 4 3 2 0 -40 -20 0 20 40 60 80 100 120 2 -40 140 o AP3783 Document number: DS37429 Rev. 6 - 2 -20 0 20 40 60 80 100 120 140 o Ambient Temperature ( C) Ambient Temperature ( C) 6 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Performance Characteristics (Cont.) Feedback Voltage vs. Ambient Temperature Under Voltage of FB Pin vs. Ambient Temperature 6 Under Voltage of Feedback Pin (V) Feedback Voltage (V) 5.0 4.5 4.0 3.5 -40 -20 0 20 40 60 80 100 120 5 4 3 2 1 -40 140 -20 0 o 20 40 60 80 100 120 140 o Ambient Temperature ( C) Ambient Temperature ( C) Line Compensation Resistance vs. Ambient Temperature Input Resistance of FB Pin vs. Ambient Temperature 1200 1100 Input Resistance of FB Pin (k) Line Compensation Resistance () 330 300 270 240 210 180 150 -40 -20 0 20 40 60 80 100 120 800 700 600 -20 0 20 40 60 80 100 120 140 o Ambient Temperature ( C) Document number: DS37429 Rev. 6 - 2 900 500 -40 140 o AP3783 1000 Ambient Temperature ( C) 7 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Operation Principle Description C2 FR1 T1 DIN LIN RST1 C1 CIN1 Ds R1 Np Ns + + R2 D1 RST2 CIN2 Da R0 + COUT2 R DUMMY 12V/1.5A 5V/2A Ra + + COUT1 Na CVCC U1 1 2 3 CCPC CS CPC 6 GND DRI VCC FB 5 4 CY1 Q1 Dg RFB1 Rg AP3783 RFB2 RCS Figure 1. Typical Application Circuit of AP3783 Figure 1 is the typical application circuit of AP3783, which is a conventional Flyback converter with a 3-winding transformer---primary winding (NP), secondary winding (NS) and auxiliary winding (NAUX). The auxiliary winding is used for providing VCC supply voltage for IC and sensing the output voltage feedback signal to FB pin. Figure 2 shows the typical waveforms which demonstrate the basic operating principle of AP3783 application. And the parameters are defined as following. IP---The primary side current IS ---The secondary side current IPK---Peak value of primary side current IPKS---Peak value of secondary side current VSEC---The transient voltage at secondary winding VS---The stable voltage at secondary winding when rectification diode is in conducting status, which equals the sum of output voltage VOUT and the forward voltage drop of diode VAUX---The transient voltage at auxiliary winding VA--- The stable voltage at auxiliary winding when rectification diode is in conducting status, which equals the sum of voltage VCC and the forward voltage drop of auxiliary diode tSW ---The period of switching frequency tONP ---The conduction time when primary side switch is “ON” tONS ---The conduction time when secondary side diode is “ON” tOFF ---The dead time when neither primary side switch nor secondary side diode is “ON” tOFFS --- The time when secondary side diode is “OFF” AP3783 Document number: DS37429 Rev. 6 - 2 8 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Operation Principle Description (Cont.) IPK IP IPKS tOFFS IS tSW VA VAUX VS VSEC tONS tONP tOFF Figure 2. The Operation Waveform of Flyback PSR System For primary-side regulation, the primary current ip(t) is sensed by a current sense resistor RCS (as shown in Figure 1).The current rises up linearly at a rate of: dip ( t ) VIN ( t ) dt LM (1) As illustrated in Figure 2, when the current ip(t) rises up to IPK, the switch Q1 turns off. The constant peak current is given by: I PK VCS R CS (2) The energy stored in the magnetizing inductance LM each cycle is therefore: Eg 1 2 L M I PK 2 (3) So the power transferring from the input to the output is given by: 1 2 P L M I PK f SW 2 (4) Where, the fSW is the switching frequency. When the peak current IPK is constant, the output power depends on the switching frequency fSW. Constant Voltage Operation As to constant-voltage (CV) operation mode, the AP3783 detects the auxiliary winding voltage at FB pin to regulate the output voltage. The auxiliary winding voltage is coupled with secondary side winding voltage, so the auxiliary winding voltage at D1 conduction time is: VAUX N AUX VO VD NS (5) Where the VD is the diode forward voltage drop. AP3783 Document number: DS37429 Rev. 6 - 2 9 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Operation Principle Description (Cont.) See Equation 5 0V tSAMPLE tONS Figure 3. Auxiliary Voltage Waveform The voltage detection point is at a constant delay time of the D1 on-time. The constant delay time is changed with the different primary peak current. The CV loop control function of AP3783 then generates a D1 off-time to regulate the output voltage. Constant Current Operation The AP3783 can work in constant-current (CC) mode. Figure 2 shows the secondary current waveforms. In CC operation mode, the CC control loop of AP3783 will keep a fixed proportion between D1 on-time tONS and D1 off-time tOFFS. The fixed proportion is t ONS 4 t OFFS 4 (6) The relationship between the output current and secondary peak current I PKS is given by: I OUT t ONS 1 I PKS 2 t ONS t OFFS (7) As to tight coupled primary and secondary winding, the secondary peak current is I PKS NP I PK NS (8) Thus the output constant-current is given by: I OUT t ONS 1 NP 2 N I PK P I PK 2 NS t ONS t OFFS 8 N S (9) Therefore, AP3783 can realize CC mode operation by constant primary peak current and fixed diode conduction duty cycle. Multiple Segment Constant Peak Current As to the original PFM PSR system, the switching frequency decreases with output current decreasing, which will encounter audible noise issue since switching frequency decreases to audio frequency range, about less than 20kHz. In order to avoid audible noise issue, AP3783 uses 4-segment constant primary peak current control method. At constant voltage mode, the current sense threshold voltage is multiple segments with different loading, as shown in Figure 4, which are VCS_H for high load, VCS_M for medium load, VCS_L for light load and VCS_D for ultra light load. At constant current mode, the peak current is still VCS_H. AP3783 Document number: DS37429 Rev. 6 - 2 10 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Operation Principle Description (Cont.) VCS_REF VCS_H High Load VCS_M Medium Load VCS_L Light Load VCS_D Ultra Light Load IO fSW 68KHz 55KHz 50KHz 45KHz 38.9KHz 31.2KHz 24.5KHz 12KHz 5.5% 34% Full load IO(MAX) IO 57% Figure 4. Multiple Segment Peak Current at CV Mode It can be seen from Figure 4, with multiple segment peak current control, AP3783 power system can achieve good audible noise performance. 3-Segment Drive Current for Radiative EMI Suppression When the power switch is turned on, a turn-on spike will occur, that worsens the radiative EMI. It is an effective way to decrease drive current before gate voltage gets to miller platform. The AP3783 uses 3-segment drive current for radiative EMI suppression, as shown in Figure 5. When gate voltage gets to 6V, the AP3783 drive current switches from low current (typical: 20mA) to high current (typical: 110mA). When the gate voltage gets to 10V, the drive current will decrease gradually to 0mA until the gate voltage goes up to the clamp voltage (13V). 13V Gate voltage 10V High drive current=110mA 6.5V Miller Platform Drive current Low drive current=20mA t Figure 5. Drive Current and Gate Voltage AP3783 Document number: DS37429 Rev. 6 - 2 11 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Operation Principle Description (Cont.) Leading Edge Blanking (LEB) Time When the power switch is turned on, a turn-on spike will occur on the sense-resistor. To avoid false turn off switch, a leading-edge blanking is built in. During this blanking time, the current sense comparator is disabled and the external power switch cannot be turned off. Furthermore, due to multiple segment peak current design, the required maximum on time tONP changes with different load conditions. Therefore the LEB time parameter also changes with different load conditions. Adjustable Line Compensation and Fixed Cable Compensation The AP3783 power system can adjust line compensation by changing the upper resistor at FB pin. The line compensation capability is increased by decreasing the resistance of the upper FB resistor. Cable compensation is fixed in AP3783. Valley Turn-on When the off time (tOFF) is lower than 16s, AP3783 power system can work with valley turn-on. It can reduce MOSFET switching on power losses which is resulted from the equivalent output capacitance. At the same time, because of valley turn-on the switching frequency has the random jitter feature, which will be benefited for conductive EMI performance. And valley turn-on can also reduce the power switch turn-on spike current and then result in the better radiative EMI performance. Frequency Jitter Even though the valley turn on function can lead the random frequency jitter feature, an active frequency jitter function is added to AP3783 to ensure the frequency jitter performance in the whole loading condition. By adjusting the VCS_REF with deviation of 5.0% every 256μs cycle, the active frequency jitter can be realized. Short Circuit Protection (SCP) Short Circuit Protection (SCP) detection principle is similar to the normal output voltage feedback detection by sensing FB pin voltage. When the detected FB pin voltage is below VFB(SCP) for a duration of about 128ms, the SCP is triggered. Then the AP3783 enters hiccup mode that the IC immediately shuts down and then restarts, so that the VCC voltage changes between VTH_ST and UVLO threshold until VFB(SCP) condition is removed. As to the normal system startup, the time duration of FB pin voltage below VFB(SCP) should be less than 18ms to avoid entering SCP mode. But for the output short condition or the output voltage below a certain level, the SCP mode will be triggered. Figure 6 is the AP3783 normal start-up waveform that the voltage of FB pin is above VFB(SCP) during tSCP after VCC gets to the VTH_ST, which doesn’t enter the SCP mode. As shown in Figure 7, VOUT is short and the voltage of FB pin is lower than VFB(SCP) during tSCP, the AP3783 triggers the SCP and enters the hiccup mode. tSCP VTH_ST VCC VFB(SCP) VFB 5V VOUT(SCP) VOUT Figure 6. Normal Start-up AP3783 Document number: DS37429 Rev. 6 - 2 12 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Operation Principle Description (Cont.) tSCP VTH_ST VCC VOPR(MIN) VFB(SCP) VFB VOUT 0V Figure 7. Short Circuit Protection (SCP) and Hiccup Mode OVP The AP3783 includes output over-voltage protection (OVP). If the voltage at FB pin exceeds VFB(OVP), the AP3783 immediately shuts down and keeps the internal circuitry enabled to discharge the VCC capacitor to the UVLO turn-off threshold. After that, the device returns to the start state and a start-up sequence ensues. OTP If the junction temperature reaches the threshold of +160⁰C, AP3783 shuts down immediately. Before VCC voltage decreases to UVLO, if the junction temperature decreases to +120⁰C, AP3783 can recover to normal operation. If not, the power system enters restart Hiccup mode until the junction temperature decreases below +120⁰C. AP3783 Document number: DS37429 Rev. 6 - 2 13 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Ordering Information AP3783 X XX XX- XX Product Name Cable Compensation Voltage A: 7% B: 4% C: 10% Package SOT26 Temperature Range -40 to +85C Cable Compensation Voltage Package Packing RoHS/Green K6 : SOT26 TR : Tape & Reel G1 : Green Part Number Marking ID Packing 7% AP3783AK6TR-G1 GBZ 3000/Tape & Reel 4% AP3783BK6TR-G1 GNZ 3000/Tape & Reel 10% AP3783CK6TR-G1 GPZ 3000/Tape & Reel Marking Information (Top View) XXX AP3783 Document number: DS37429 Rev. 6 - 2 : Logo XXX: Marking ID (See Ordering Information) 14 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SOT26 0° 2.820(0.111) 8° 3.100(0.122) 0.300(0.012) 0.500(0.020) 5 4 2 3 0.300(0.012) 0.600(0.024) 1.500(0.059) 1.700(0.067) 2.650(0.104) 3.000(0.118) 6 0.200(0.008) Pin 1 Mark 1 0.700(0.028)REF 0.950(0.037)TYP 0.000(0.000) 0.150(0.006) 1.800(0.071) 2.000(0.079) 0.100(0.004) 0.200(0.008) 0.900(0.035) 1.450(0.057) MAX 1.300(0.051) AP3783 Document number: DS37429 Rev. 6 - 2 15 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 Suggested Pad Layout (1) Package Type: SOT26 E E Y G Z X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch) Value 3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037 AP3783 Document number: DS37429 Rev. 6 - 2 16 of 17 www.diodes.com December 2015 © Diodes Incorporated AP3783 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). 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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 in 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 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-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 © 2015, Diodes Incorporated www.diodes.com AP3783 Document number: DS37429 Rev. 6 - 2 17 of 17 www.diodes.com December 2015 © Diodes Incorporated