ZXLD1350Q
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 21
Technical content
Features
Simple Low Parts Count Internal 30V NDMOS Switch Internal PWM Filter High Efficiency (Up to 95%) Wide Input Voltage Range: 7V to 30V 40V Transient Capability Up to 1MHz Switching Frequency Typical 4% Output Current Accuracy Green Molding (No Br, Sb) in TSOT25 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Automotive Compliant Qualified to AEC-Q100 Standards for High Reliability PPAP Capable (Note 4) Pin Assignments (Top View) TSOT25 Notes: 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. Typical Application Circuit
Document number: DS37076 Rev. 2 - 2 2 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Block Diagram Block Diagram – Pin Connection Pin Description Pin Number Pin Name Description
1 LX Drain of NDMOS switch
2 GND Ground (0V)
3 ADJ
Multi-function On/Off and brightness control pin: Leave floating for normal operation VADJ = VREF = 1.25V giving nominal average output current IOUTnom = 0.1/RS Drive to voltage below 0.2V to turn off output current. Drive with Analog voltage: 0.3V < VADJ < 2.5V adjusts output current from 25% to 200%(†) of IOUTnom Drive with PWM signal from open-collector or open-drain transistor, to adjust output current. Adjustment range 25% to 100% of IOUTnom for f > 10kHz and 1% to 100% of IOUTnom for f < 500Hz Connect a capacitor from this pin to ground to increase soft-start time. (Default soft-start time = 0.5ms. Additional soft-start time is approx.0.5ms/nF) 4 ISENSE Connect resistor RS from this pin to VIN to define nominal average output current IOUTnom = 0.1/RS (Note: RSMIN = 0.27Ω with ADJ pin open circuit) 5 VIN Input voltage (7V to 30V). Decouple to ground with 1µ F of higher X7R ceramic capacitor close to device MN VIN Comparator GND LXVIN ISENSE Current sense circuit VIN ADJ RS 5VVoltage regulator Shutdown circuit Vref 200k 1.25V 4KHz
Document number: DS37076 Rev. 2 - 2 3 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated) Symbol Parameter Rating Unit VIN Input Voltage -0.3 to +30 (40V for 0.5 sec) V VSENSE ISENSE Voltage +0.3 to -5 (measured with respect to VIN) V VLX LX Output Voltage -0.3 to +30 (40V for 0.5 sec) V VADJ Adjust Pin Input Voltage -0.3 to +6 V ILX Switch Output Current 500 mA PTOT Power Dissipation (Refer to Package Thermal De-rating Curve on Page 17) 450 mW TST Storage Temperature -55 to +150 °C TJ MAX Junction Temperature +150 °C ESD Susceptibility HBM Human Body Model 500 V CDM Charged Device Model 1000 V MM Machine Model 75 V Caution: Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stre ss ratings only; functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. (Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD event s. Suitable ESD precautions should be taken when handling and transporting these devices.) Thermal Resistance Symbol Parameter Rating Unit JA Junction to Ambient 200 ° C/W Recommended Operating Conditions Symbol Parameter Min Typ. Max Units VIN Input Voltage 7 — 30 V tOFFMIN Minimum Switch Off-time — — 800 ns tONMIN Minimum Switch On-time — — 800 ns DLX Duty Cycle Range 0.01 — 0.99 — TA Ambient Operating Temperature Range -40 — +105 °C ILX_CONT Average/RMS LX Switch Current — — 0.37 A fLXmax Recommended Maximum Operating Frequency — — 1 MHz tPD Internal Comparator Propagation Delay — 50 — ns
Document number: DS37076 Rev. 2 - 2 4 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Electrical Characteristics (Test conditions: VIN = 12V, Tamb = +25° C, unless otherwise specified.) Symbol Parameter Condition Min. Typ. Max. Unit VSU Internal Regulator Start-up Threshold VIN rising — 4.8 — V IINQoff Quiescent Supply Current with Output Off ADJ pin grounded — 15 20 µA IINQon Quiescent Supply Current with Output Switching ADJ pin floating, f = 250kHz — 250 500 µA VSENSE Mean Current Sense Threshold Voltage (Defines LED Current Setting Accuracy) Measured on ISENSE pin with respect to VIN VADJ = 1.25V 95 100 105 mV VSENSEHYS Sense Threshold Hysteresis — — ± 15 — % ISENSE ISENSE Pin Input Current VSENSE = VIN -0.1 — 1.25 10 µA VREF Internal Reference Voltage Measured on ADJ pin with pin floating 1.21 1.25 1.29 V VREF/T Temperature Coefficient of VREF — — 50 — ppm/° C VADJ External Control Voltage Range on ADJ Pin for DC Brightness Control (Note 5) — 0.3 — 2.5 V VADJoff DC Voltage on ADJ Pin to Switch Device from Active (On) State to Quiescent (Off) State VADJ falling 0.15 0.2 0.25 V VADJon DC Voltage on ADJ Pin to Switch Device from Quiescent (Off) State to Active (On) State VADJ rising 0.2 0.25 0.3 V RADJ Resistance between ADJ Pin and VREF — 135 — 250 kΩ ILXmean Continuous LX Switch Current — — — 0.37 A RLX LX Switch ‗On‘ Resistance — — 1.5 2 Ω ILX(leak) LX Switch Leakage Current — — — 1 µA DPWM(LF) Duty Cycle Range of PWM Signal Applied to ADJ Pin during Low Frequency PWM Dimming Mode PWM frequency <500Hz PWM amplitude = VREF Measured on ADJ pin 0.01 — 1 — Brightness Control Range — 100:1 — — DPWM(HF) Duty Cycle Range of PWM Signal Applied to ADJ Pin during High Frequency PWM Dimming Mode PWM frequency <10kHz PWM amplitude = VREF Measured on ADJ pin 0.16 — 1 — Brightness Control Range — 5:1 — — fLX Operating Frequency (See Graphs for More Details) ADJ pin floating L = 100H (0.82V) IOUT = 350mA @ VLED = 3.4V Driving 1 LED — 250 — kHz tSS Start Up Time (See Graphs for More Details) Time taken for output current to reach 90% of final value after voltage on ADJ pin has risen above 0.3V. — 500 — µs Note: 5. 100% brightness corresponds to V ADJ = V ADJ(nom) = V REF. Driving the ADJ pin above V REF will increase the V SENSE threshold and output current proportionally.
The device, in conjunction with the coil (L1) and current sense resistor (RS), forms a self-oscillating continuous-mode buck converter. Figure 1. Theoretical Operating Waveforms the (+) input of the comparator. from VIN to ground, via RS, L1 and the LED(s). The current rises at a rate determined by VIN and L1 to produce a voltage ramp (VSENSE) across RS. resistor R3 to provide a controlled amount of hysteresis. The hysteresis is set by R3 to be nominally 15% of VADJ. switches high again. This cycle of events repeats, with the comparator input ramping between limits of VADJ ± 15%.
Document number: DS37076 Rev. 2 - 2 6 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Device Description (Cont.) Switching Thresholds With VADJ = VREF, the ratios of R1, R2 and R3, define an average V SENSE switching threshold of 100mV (measured on the ISENSE pin with respect to VIN). The average output current IOUTnom is then defined by this voltage and RS according to: IOUTnom = 100mV/RS Nominal ripple current is ± 15mV/RS. Adjusting Output Current The device contains a low pass filter between the ADJ pin and the threshold comparator and an internal current limiting resistor (200k nom) between ADJ and the internal reference voltage. This allows the ADJ pin to be overdriven with either DC or pulse signals to change the V SENSE switching threshold and adjust the output current. The filter is third order, comprising three sections, each with a cut -off frequency of nominally 4kHz. Details of the different modes of adjusting output current are given in the applications section. Output Shutdown The output of the low pass filter drives the shutdown circuit. When the input voltage to this circuit falls below the thresho ld (0.2V nom), the internal regulator and the output switch are turned off. The voltage reference remains powered during shutdo wn to provide the bias current for the shutdown circuit. Quiescent supply current during shutdown is nominally 15mA and switch leakage is below 1mA. Typical Operating Waveforms [VIN = 12V, RS = 0.3, L = 100μH] Normal Operation. Output Current (Ch3) and LX Voltage (Ch1) Start-up Waveforms. Output Current (Ch3), LX Voltage (Ch1) and VADJ (Ch2)
Document number: DS37076 Rev. 2 - 2 7 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Typical Operating Conditions
Document number: DS37076 Rev. 2 - 2 8 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Typical Characteristics (Cont.)
Document number: DS37076 Rev. 2 - 2 9 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Typical Characteristics (Cont.)
Document number: DS37076 Rev. 2 - 2 10 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q
Application Information
Setting Nominal Average Output Current with External Resistor RS The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (R S) connected between V IN and ISENSE and is given by: IOUTnom = 0.1/RS [for RS 0.27Ω] The table below gives values of nominal average output current for several preferred values of current setting resistor (R S) in the typical application circuit shown on page 1: RS (Ω) Nominal Average Output Current (mA) 0.27 370 0.30 333 0.33 300 0.39 256 The above values assume that the ADJ pin is floating and at a nominal voltage of V REF (=1.25V). Note that R S = 0.27 is the minimum allowed value of sense resistor under these conditions to maintain switch current below the specified maximum value. It is possible to use different values of RS if the ADJ pin is driven from an external voltage. (See next section). Output Current Adjustment by External DC Control Voltage The ADJ pin can be driven by an external dc voltage (VADJ), as shown, to adjust the output current to a value above or below the nominal average value defined by RS. The nominal average output current in this case is given by: IOUTdc = 0.08*VADJ /RS for 0.3 < VADJ < 2.5V Note that 100% brightness setting corres ponds to V ADJ = VREF. When driving the ADJ pin above 1.25V, R S must be increased in proportion to prevent IOUTdc exceeding 370mA maximum. The input impedance of the ADJ pin is 200kΩ ±25%. GND ZXLD1350ADJ DC GND ZXLD1350Q
Document number: DS37076 Rev. 2 - 2 11 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Application Information (Cont.) Output Current Adjustment by PWM Control Directly Driving ADJ Input A Pulse Width Modulated (PWM) signal with duty cycle D PWM can be applied to the ADJ pin, as shown below, to adjust the output current to a value above or below the nominal average value set by resistor RS: Driving the ADJ Input via Open Collector Transistor The recommended method of driving the ADJ pin and controlling the amplitude of the PWM waveform is to use a small NPN switching transistor as shown below: This scheme uses the 200k resistor between the ADJ pin and the internal voltage reference as a pull-up resistor for the external transistor. Driving the ADJ Input from a Microcontroller Another possibility is to drive the device from the open drain output of a microcontroller. The diagram below shows one method of doing this: The diode and resistor suppress possible high amplitude negative spikes on the ADJ input resulting from the drain-source capacitance of the FET. Negative spikes at the input to the device should be avoided as they may cause errors in output current, or erratic device operation. PWM dimming can be further split into high frequency and low frequency PWM dimming and how the device responds to these. ADJ ZXLD1350 GND GND PWM ZXLD1350 GND ADJ 10kMCU VADJ GND ADJ ZXLD1350 GND PWM ZXLD1350Q ZXLD1350Q ZXLD1350Q
avoid injecting excessive noise into the internal reference. Figure 3. High Frequency PWM Operating Waveforms range is a result of the device being turned off when the DC component on the filter output falls below 200mV. average value. (See graphs for details).
Document number: DS37076 Rev. 2 - 2 14 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Application Information (Cont.) Soft-start The device has inbuilt soft -start action due to the delay through the PWM filter. An external capacitor f rom the ADJ pin to ground will provide additional soft-start delay, by increasing the time taken for the voltage on this pin to rise to the turn -on threshold and by slowing down the rate of rise of the control voltage at the input of the comparator. With n o external capacitor, the time taken for the output to reach 90% of its final value is approximately 500μs. Adding capacitance increases this delay by approximately 0.5ms/nF. The graph below shows the variation of soft-start time for different values of capacitor. Inherent Open-circuit LED Protection If the connection to the LED(s) is open-circuited, the coil is isolated from the LX pin of the chip, so the device will not be damaged, unlike in many boost converters, where the back EMF may damage the internal switch by forcing the drain above its breakdown voltage. Capacitor Selection A low ESR capacitor should be used for input decoupling, as the ESR of this capacitor appears in series with the supply sourc e impedance and lowers overall efficiency. This capacitor has to supply the relatively high peak current to the coil and smooth the current ripple on the input supply. A minimum value of 1μF is acceptable if the input source is close to the device, but higher values will improve performance at lower input voltages, especially when the source impedance is high. The input capacitor should be placed as close as possible to the IC. For maximum stability over temperature and voltage, capacitors with X7R, X5R, or better dielectric are recommended. Capacit ors with Y5V dielectric are not suitable for decoupling in this application and should NOT be used. A table of recommended manufacturers is provided below: Manufacturer Website Murata www.murata.com Taiyo Yuden www.t-yuden.com Kemet www.kemet.com AVX www.avxcorp.com Inductor Selection Recommended inductor values for the ZXLD1350Q are in the range 47µ H to 220µ H. Higher values of inductance are recommended at higher supply voltages in order to minimize errors due to switching delays, wh ich result in increased ripple and lower efficiency. Higher values of inductance also result in a smaller change in output current over the supply voltage range. (See graphs). The inductor should be mounted as close to the device as possible with low resistance connections to the LX and VIN pins. The chosen coil should have a saturation current higher than the peak output current and a continuous current rating above the required mean output current.
Document number: DS37076 Rev. 2 - 2 15 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Application Information (Cont.) Suitable coils for use with the ZXLD1350Q are listed in the table below: Part Number L (µ H) DCR (V) ISAT (A) Manufacturer DO1608C 47 0.64 0.5 CoilCraft MSS6132ML 47 0.38 0.56 68 0.58 0.47 100 0.82 0.39 CD104-MC 220 0.55 0.53 Sumida NP04SB470M 47 0.27 0.38 Taiyo Yuden The inductor value should be chosen to maintain operating duty cycle and switch 'on'/'off' time within the specified limits over th e supply voltage and load current range. The following equations can be used as a guide, with reference to Figure 1 - Operating waveforms. LX Switch 'On' Time LXLSav gLEDIN ON RrRIVV Note: tONnmin > 200ns LX Switch 'Off' Time LSav gDLED OFF rRIVV ILt Note: tOFFmin > 200ns Where: L is the coil inductance (H) rL is the coil resistance () Iavg is the required LED current (A) I is the coil peak-peak ripple current (A) {Internally set to 0.3 x Iavg} VIN is the supply voltage (V) VLED is the total LED forward voltage (V) RLX is the switch resistance () VD is the rectifier diode forward voltage at the required load current (V) Example: For VIN = 12V, L = 47µ H, rL = 0.64, VLED = 3.4V, Iavg = 350mA and VD = 0.36V This gives an operating frequency of 546kHz and a duty cycle of 0.34. These and other equations are available as a spreadsheet calculator from the Diodes website. Note that in practice, the duty cycle and operating frequency will deviate from the calculated values due to dynamic switchin g delays, switch rise/fall times and losses in the external components. Optimum performance will be achieved by setting the duty cycle close to 0.5 at the nominal supply voltage. This helps to equa lize the undershoot and overshoot and improves temperature stability of the output current.
Document number: DS37076 Rev. 2 - 2 16 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Application Information (Cont.) Diode Selection For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode with low reverse l eakage at the maximum operating voltage and temperature. The recommended diode fo r use with this part is the DFLS140Q. This has approximately ten times lower leakage than standard Schottky diodes, which are unsuitable for use above +85° C. It also provides better efficiency than silicon diodes, due to a combination of lower forward voltage and reduced recovery time. The table below gives the typical characteristics for the DFLS140Q: Diode Forward Voltage @ 300mA (mV) Continuous Current (mA) Reverse Leakage @ 30V +85° C (µA) Package DFLS140Q 410 1000 100 PowerDI®123 If alternative diodes are used, it is important to select parts with a peak current rating above the peak coil current and a continuous curre nt rating higher than the maximum output load current. It is very important to consider the reverse leakage of the diode when opera ting above +85° C. Excess leakage will increase the power dissipation in the device. The higher forward voltage and overshoot due to reverse recovery time in silicon diodes will increase the peak voltage on the LX output. If a silicon diode is used, care should be taken to ensure that the total voltage appearing on the LX pin including supply ripple, does not exceed the specifie d maximum value. Reducing Output Ripple Peak to peak ripple current in the LED(s) can be reduced, if required, by shunting a capacitor Cled across the LED(s) as shown below: ZXLD1350 LE D Cled LXISENSE RSVIN VIN A value of 1μF will reduce nominal ripple current by a factor three (approx.). Proportionally lower ripple can be achieved wi th higher capacitor values. Note that the capacitor will not affect operating freq uency or efficiency, but it will increase start -up delay, by reducing the rate of rise of LED voltage. Operation at low supply voltage The internal regulator disables the drive to the switch until the supply has risen above the start -up threshold (VSU). A bove this threshold, the device will start to operate. However, with the supply voltage below the specified minimum value, the switch duty cycle will be high and the device power dissipation will be at a maximum. Care should be taken to avoid operating the device under such conditions in the application, in order to minimize the risk of exceeding the maximum allowed die temperature. (See next section on thermal considerations). Note that when driving loads of two or more LEDs, the forward drop will normall y be sufficient to prevent the device from switching below approximately 6V. This will minimize the risk of damage to the device. ZXLD1350Q
Document number: DS37076 Rev. 2 - 2 17 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Application Information (Cont.) Thermal Considerations When operating the device at high ambient temperatures, or when dr iving maximum load current, care must be taken to avoid exceeding the package power dissipation limits. The graph below gives details for power derating. This assumes the device to be mounted on a (25mm)2 PCB with 1oz copper standing in still air. Note that the device power dissipation will most often be a maximum at minimum supply voltage. It will also increase if the efficiency of the circuit is low. This may result from the use of unsuitable coils, or excessive parasitic output capacitance on the switch output. Thermal Compensation of Output Current High luminance LEDs often need to be supplied with a temperature compensated current in order to maintain stable and reliable operation at all drive levels. The LEDs are usually mounted remotely from the device, so for this reason, the temperature coefficients of the internal circuits for the ZXLD1350Q have been optimized to minimize the change in output current when no compensation is employed. If output current co mpensation is required, it is possible to use an external temperature sensing network - normally using Negative Temperature Coefficient (NTC) thermistors and/or diodes, mounted very close to the LED(s). The output of the sensing network can be used to drive the ADJ pin in order to reduce output current with increasing temperature. Layout Considerations LX Pin The LX pin of the device is a fast switching node, so PCB tracks should be kept as short as possible. To minimize ground 'bounce', the ground pin of the device should be soldered directly to the ground plane. Coil and Decoupling Capacitors It is particularly important to mount the coil and the input decoupling capacitor close to the device to minimize parasitic r esistance and inductance, which will degrade efficiency. It is also important to take account of any track resistance in series with current sense resistor RS. ADJ Pin The ADJ pin is a high impedance input, so when left floating, PCB tracks to this pin should be as short as possible to reduce noise pickup. A 100nF capacitor from the ADJ pin to ground will reduce frequency modulation of the output under these conditions. An additional series 10kΩ resistor can also be used when driving the ADJ pin from an external circuit (see below). This resistor will provide filtering for low frequency noise and provide protection against high voltage transients. ZXLD1350 GND ADJ 100nF GND 10k High Voltage Tracks Avoid running any high voltage tracks close to the ADJ pin, to reduce the risk of leakage due to board contamination. Any such leakage may raise the ADJ pin voltage and cause excessive output current. A ground ring placed around the ADJ pin will minimize changes in outp ut current under these conditions. ZXLD1350Q
Document number: DS37076 Rev. 2 - 2 18 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q
Ordering Information
(Note 6) Part Mark Packing: 7” Tape and Reel Qualification Grade (Note 7) Quantity Per Reel Tape Width Part Number Suffix ZXLD1350QET5TA ET5 TSOT25 1350 3000 8mm TA Automotive Compliant 7. ZXLD1350Q has been qualified to AEC-Q100 grade 2 and is classified as ―Automotive Compliant‖ supporting PPAP documentation. See ZXLD1350 datasheet for commercial qualified versions. Marking Information TSOT25 XXXX : Identification Code : 1350 Q : Automotive Compliant
Document number: DS37076 Rev. 2 - 2 19 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. TSOT25 D E1/2 E E/2 e A Seating Plane0 L Gauge Plane 01(4x) 01(4x) c b Seating Plane Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. TSOT25 C X Y TSOT25 Dim Min Max Typ A - 1.00 - A1 0.01 0.10 - A2 0.84 0.90 - b 0.30 0.45 - c 0.12 0.20 - D - - 2.90 E - - 2.80 E1 - - 1.60 e 0.95 BSC e1 1.90 BSC L 0.30 0.50 L2 0.25 BSC θ 0° 8° 4° θ1 4° 12° - All Dimensions in mm Dimensions Value (in mm) C 0.950 X 0.700 Y 1.000 Y1 3.199
Document number: DS37076 Rev. 2 - 2 20 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q
Revision History
Added further clarification of Automotive Compliance and reference to Diodes’ definition (Page 1, Note 4 and page 18, Note 7) Corrected device part mark to include pin 1 identifier (Pages 1 and 18) Correction of ESD ratings (Page 3) (Note 8): ESD Rating Incorrect revision 1-2 specification Corrected revision 2-2 specification Unit HBM Human Body Model 500 500 V MM Machine Model 100 75 V CDM Charged Device Model 1000 1000 V Note 8. The actual physical ESD withstand capability is unaltered.
Document number: DS37076 Rev. 2 - 2 21 of 21 www.diodes.com September 2017 © Diodes Incorporated ZXLD1350Q 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. Diode s 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 Cus tomer or user of this 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 unauth orized 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 system s 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 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 provid ed 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 © 2017, Diodes Incorporated www.diodes.com