R5641L NISSHINBO | Alldatasheet

Document overview

  • Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
  • PDF pages: 21

Technical content

2 to 4 Serial Cell Li-ion Battery Protection IC for Secondary Protection NO.EA-426-250728 The R5641L is an overcharge protection IC for 2 - to 4-series cell Li-ion / Li-polymer rechargeable battery pack, with built-in high-accuracy voltage detection circuits and delay circuits. Controlling the supply voltage to the CTLC pin can control the COUT pin output. The shutdown detection can reduce the supply current to the minimum.

  • Reducing the supply current to 0.2 µA or less after shutdown detection can achieve the longer battery life.
  • Temperature protection enabled with an external PTC thermistor.
  • Be adaptable to 30 V input voltage by using high-voltage process.
  • Overcharge Detection Voltage (VDET1n (1))：4.10 V to 4.70 V (5 mV step)
  • Overcharge Detection Voltage Accuracy： ± 0.016 V (Ta = 25°C)
  • Overcharge Release Voltage(VREL1n (1))：VDET1n -0V to VDET1n -0.4V (2) (50mV step)
  • Overcharge Detection Delay Time： 2- / 4- / 6-sec
  • Release Condition: Voltage Release Type
  • Low Supply Current：Typ.2.8 µA
  • Shutdown Current：Max. 0.2 µA
  • 2 to 4 Cells Selectable Battery Protection by External Wirings
  • Selectable Timer Reset Delay Function
  • Temperature Protection with External PTC Thermistor
  • CTLC Pin Detection Delay Time： 2 msec
  • Output Type： CMOS Output 4-cell Protection Circuit with PTC Thermistor User-selectable Delay Time and Function： Code ($) Overcharge Detection Delay Time A 2 sec B 4 sec C 6 sec Code (∗) CTLC at Shutdown Timer Reset Delay C Disable Disable D Enable Disable E Disable Enable F Enable Enable DFN2020-8C 2.0 mm x 2.0 mm x 0.6 mm
  • Li-Ion or Li-Polymer Battery Protection (1) VDET1n, VREL1n : n =1, 2, 3, 4 (2) Min. 4.05 V when shutdown detection voltage (VSHTn) is 3.7 V.

APPLICATIONS

TYPICAL APPLICATION CIRCUIT PACKAGE

NO.EA-426-250728 SELECTION GUIDE Overcharge detection / release voltages and delay time are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R5641Lxxx$∗-TR DFN2020-8C 3,000 pcs Yes Yes xxx: Specify the combination of the overcharge detection voltage (VDET1n), the overcharge release voltage (V REL1n), and the shutdown detection voltage (VSHTn) (1). VDET1n(2) : 4.1 V to 4.7 V in 5 mV step V REL1n (2) : VDET1n –0V to VDET1n –0.4V in 50 mV step (3) VSHTn(2) : 2.5V / 3.7 V $: Specify the delay time code defined a combination of the overcharge detection delay time (tVDET1), the overcharge release delay time (tVREL1), and the CTLC detection delay time (tCDET). Code $ tVDET1 (s) tVREL1 (ms) tCDET (ms) A 2 16.5 2 B 4 16.5 2 C 6 16.5 2 ∗: Specify the CTLC function and the timer reset delay function. Code ∗ CTLC Function at Shutdown Timer Reset Delay Function C Disable Disable D Enable Disable E Disable Enable F Enable Enable (1) Refer to Product Code Table for details. (2) VDET1n, VREL1n, VSHTn: n =1, 2, 3, 4 (3) Min. 4.05 V when shutdown detection voltage (VSHTn) is 3.7 V.

NO.EA-426-250728 Product Code List The product code is determined by the combination of the set output voltage (overcharge detector threshold: VDET1n, overcharge release voltage: V REL1n, shutdown detector threshold: VSHTn), the delay time (overcharge detection delay time: tVDET1, overcharge release delay time: tVREL1, CTLC detection delay time: tCDET), the CTLC function and the timer reset delay time (tVTR) option. Product Cod e Table Product Name Set Output Voltage (V) Delay Time CTLC Function (at Shutdown) Timer Reset Delay Time (Yes/No(1)) VDET1n VREL1n VSHTn tVDET1(s) tVREL1(ms) tCDET (ms) R5641L252AF 4.220 4.120 3.700 2 16.5 2 Enable Yes R5641L255AF 4.250 4.150 3.700 2 16.5 2 Enable Yes R5641L301CC 4.300 4.000 2.500 6 16.5 2 Disable No R5641L302BD 4.350 4.050 2.500 4 16.5 2 Enable No R5641L303BD 4.500 4.100 2.500 4 16.5 2 Enable No R5641L304BD 4.450 4.050 2.500 4 16.5 2 Enable No R5641L306BC 4.550 4.150 2.500 4 16.5 2 Disable No R5641L307BC 4.600 4.200 2.500 4 16.5 2 Disable No R5641L303BC 4.500 4.100 2.500 4 16.5 2 Disable No R5641L352CC 4.350 4.050 3.700 6 16.5 2 Disable No R5641L308CC 4.650 4.250 2.500 6 16.5 2 Disable No (1) “No” means the timer reset delay time option is absence. Please contact our sales representatives if required a product code other than the above combinations.

NO.EA-426-250728 BLOCK DIAGRAM R5641Lxxx$D/$F Block Diagram (Enabled CTLC Function at Shutdown) VC1 VC2 VC3 VC4 VD1-1 VD1-2 VD1-3 Regulator DS Circuit VDD Logic Circuit Oscillator Counter VSS VD1-4 COUT Regulator Regulator Logic Circuit CTLC Shutdown Shutdown Shutdown Shutdown Logic Circuit

NO.EA-426-250728 R5641Lxxx$C/$E Block Diagram (Disabled CTLC Function at Shutdown) VC1 VC2 VC3 VC4 VD1-1 VD1-2 VD1-3 Regulator DS Circuit VDD Logic Circuit Oscillator Counter VSS VD1-4 COUT Regulator Regulator Logic Circuit CTLC Shutdown Shutdown Shutdown Shutdown Logic Circuit

NO.EA-426-250728 PIN DESCRIPTION Top View Bottom View DFN2020-8C Pin Configuration Pin No. Symbol Description

1 VDD Power Supply Pin,

2 VC1 Positive Terminal for CELL1

3 VC2 Positive Terminal for CELL2

4 VC3 Positive Terminal for CELL3

5 VC4 Positive Terminal for CELL4

6 VSS Ground Pin

7 CTLC COUT Control Pin / Output Delay Time Shortening Pin

8 COUT Overcharge Detection Output Pin, CMOS Output

∗The tab on the bottom of the package is not connected with the IC chip, so the tab should be left open. 43 2 1 567 8 1234 8765

NO.EA-426-250728 ABSOLUTE MAXIMUM RATINGS (Ta = 25°C, VSS = 0V) Symbol Item Rating Unit VDD Supply Voltage -0.3 to 30 V VC1 VC2 VC3 VC4 VCTLC Positive Terminal Voltage for CELL1 Positive Terminal Voltage for CELL2 Positive Terminal Voltage for CELL3 Positive Terminal Voltage for CELL4 CTLC Pin Voltage VC2-0.3 to VC2+6.5 VC3-0.3 to VC3+6.5 VC4-0.3 to VC4+6.5 -0.3 to 6.5 -0.3 to 30 V V V V V VCOUT COUT Pin Output Voltage -0.3 to VOH1+0.3 V PD Power Dissipation(1) (DFN2020-8C, JEDEC STD.51-7) 1400 mW Tj Junction Temperature Range -40 to 125 °C Tstg Storage Temperature Range -55 to 125 °C ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause permanent damage and may degrade the lifetime and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITION Symbol Item Rating Unit VDD Operating Input Voltage 4.0 to 20 V Ta Operating Temperature Range −40 to 85 °C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. (1) Refer to POWER DISSIPATION in SUPPLEMENTSRY ITEMS for detail information.

NO.EA-426-250728

ELECTRICAL CHARACTERISTICS

VCELLn = CELLn (Ex. VCELL1 is a voltage difference b etween VC1 and VC2), n = 1, 2, 3, 4, unless otherwise noted. The specifications surrounded by are guaranteed by Design Engineering at 0°C ≤ Ta ≤ 60°C. Symbol Parameter Conditions Ratings Unit Circuit (1) Min. Typ. Max. VDET1n CELLn overcharge detection voltage at rising edge of voltage VDET1n -0.016V VDET1n VDET1n +0.016V V A VDET1n -0.025V VDET1n +0.025V VREL1n CELLn overcharge release voltage at falling edge of voltage VREL1n -0.050V VREL1n VREL1n +0.050V V A tVDET1 Overcharge detection delay time VCELLn = VDET1n-0.1V(n=2,3,4) VCELL1 = VDET1n-0.1V → 4.7 V (VDET1n ≤ 4.6 V) or → 4.8V (VDET1n > 4.6V) tVDET1 x 0.8 tVDET1 tVDET1 x 1.2 s B tVD1DS Overcharge detection delay time at delay shortening mode VCELLn = VDET1n-0.1V(n=2,3,4) VCELL1 = VDET1n-0.1V → 4.7 V (VDET1n ≤ 4.6V) or → 4.8V (VDET1n > 4.6V) VCTLC = VDD + 1.5V 0.5 4 8 ms B tVREL1 Overcharge release delay time VCELLn = VREL1n-0.1V(n=2,3,4) VCELL1 = 4.7 V (VDET1n ≤ 4.6 V) or 4.8V (VDET1n > 4.6V) → VREL1n- 0.1V tVREL1 x 0.8 tVREL1 tVREL1 x 1.2 ms B tVTR Overcharge detection timer reset delay time (2) VCELLn = VDET1n+0.05V → VREL1n-0.10V → VDET1n+0.05V → VREL1n-0.10V 2 6 10 ms B VSHTn Shutdown detection voltage at falling edge of voltage VSHTn -0.3V VSHTn VSHTn +0.3V V C VIH CTLC pin input voltage, high VDD +1.0V V D VIL CTLC pin input voltage, low VDD = 4V or more VDD -2.0V V D tCDET CTLC pin detection delay time VCELLn = 4.0V VCTLC = 16.0V→13.0V tCDET x 0.8 tCDET tCDET x 1.2 ms D For CTLC enabled product (3) VCELLn = VSHTn-0.4V VCTLC = VDD+0V→VDD-3V tCDET+1 ICTLC CTLC pin current μA D For CTLC enabled product (3) For CTLC disabled product (3) VCELLn = 2.0V, VCTLC = 8.0V -0.2 0.2 (1) Refer to TEST CIRCUITS for detail information. (2) For the timer reset delay function enabled product only (3) At shutdown

NO.EA-426-250728 VCELLn = CELLn (Ex. VCELL1 is a voltage difference b etween VC1 and VC2), n = 1, 2, 3, 4, unless otherwise noted. The specifications surrounded by are guaranteed by Design Engineering at 0°C ≤ Ta ≤ 60°C. Symbol Parameter Conditions Ratings Unit Circuit (1) VOL COUT pin Nch. ON voltage1 IOL = 50 μA, VCELLn = VDET1n-0.1V 0.08 0.5 V E VOH1 COUT pin Pch. ON voltage1 IOH = -1μA, VCELLn = 4.7 V (VDET1n ≤ 4.6 V) or 4.8V (VDET1n > 4.6V) 4.0 4.7 5.4 V F VOH2 COUT pin Pch. ON voltage2 IOH = -50μA, VCELLn = 4.7 V (VDET1n ≤ 4.6 V) or 4.8V (VDET1n > 4.6V) VOH1 -0.5V VOH1 -0.14V V G ISHT Shutdown current VCELLn = VSHTn-0.4V 0.2 μA H ISS Supply current VCELLn = 4.0V (the total current value of IVDD and IVC1) 2.8 5.0 μ A H IVC1 VC1 pin current VCELLn = VDET1n-0.1V 1.0 2.0 μA H IVC2 VC2 pin current VCELLn = VDET1n-0.1V -0.3 0.3 μA H IVC3 VC3 pin current VCELLn = VDET1n-0.1V -0.3 0.3 μA H IVC4 VC4 pin current VCELLn = VDET1n-0.1V -0.3 0.3 μA H (1) Refer to TEST CIRCUITS for detail information.

NO.EA-426-250728 Test Circuits A VDD VC1 VC2 VC3 VSS CTLC COUT V V V OSCILLOSCOPE V VC4 B VDD VC1 VC2 VC3 VSS CTLC COUT V OSCILLOSCOPE VC4 D VDD VC1 VC2 VC3 VSS CTLC COUT OSCILLOSCOPE VC4 V A F VDD VC1 VC2 VC3 VSS CTLC COUT VC4 V E VDD VC1 VC2 VC3 VSS CTLC COUT VC4 V G VDD VC1 VC2 VC3 VSS CTLC COUT VC4 V H VDD VC1 VC2 VC3 VSS CTLC COUT VC4 A A A A A C VDD VC1 VC2 VC3 VSS CTLC COUT V V V V VC4 A

NO.EA-426-250728 THEORY OF OPERATION Overcharge Detector, VDET1n (n = 1, 2, 3, 4) During charging, the device supervises the voltage between VC1 pin and VC2 pin (VCELL1), the voltage between VC2 pin and VC3 pin (VCELL2), the voltage between V C3 pin and VC4 pin (VCELL3), and the voltage between VC4 pin and VSS pin (VCELL4). If at least one of the cell voltages exceeds more than the overcharge detection voltage (VDET1n), the overcharge is detected, and an external charge control Nch. MOSFET turns on with COUT pin being at "H igh" level and by cutting a fuse on the charger path, and charge stops. If all the cell voltages become lower than the overcharge release voltage (VREL1n), the overcharge is released and COUT pin outputs “Low”. The device has internal fixed output delay times for overcharge detection, overcharge detection timer reset, and overcharge release. If the output delay time passes on when any one of cell voltages is more than VDET1n, the overcharge is detected. In the case of Timer Reset Delay available version, if all the cell voltages become lower than VDET1n within the overcharge detection delay time by noise or other reasons, the time period is less than overcharge detection timer reset delay time, the overcharge delay time is accumulated and maintained, and the accumulated delay time reaches the overcharge detection delay time, the overcharge is detected. After detecting overcharge, even if all the cell voltages reduce less than the release voltage, if at least one of the cells voltage exceeds more than the release voltage within the overcharge release delay time, then overcharge is not released. The output type of the COUT pin is CMOS output between V SS and the built-in regulator, and "High" level of COUT pin is the output voltage of the built-in regulator.

NO.EA-426-250728 Overcharge Operation Timing Chart Shutdown Function The voltage between V C1 pin and VC2 pin (V CELL1), the voltage between VC2 pin and VC3 pin (V CELL2), the voltage between VC3 pin and VC4 pin (V CELL3), and the voltage between VC 4 pin and VSS pin (V CELL4) are supervised. If all of V CELLn (n=1 to 4) become less than the shutdown detection voltage, the device halts the operation, and the supply current (shutdown current) of the device can be reduced to the minimum. If one of VCELLn (n=1 to 4) becomes more than the shutdown detection voltage, the device will release from the shutdown state. VDET11 VREL11 VCELL1 t tVREL1 tVDET1 tVDET1 VSS COUT tVREL1 t VDET12 VREL12 VCELL2 t VDET13 VREL13 VCELL3 t VDET14 VREL14 VCELL4 t Charge/Discharge Current Charge Current Discharge Current t Connect Charger Connect Load

NO.EA-426-250728 CTLC Function When expiring the CTLC detection delay time or more after applying the voltage of VDD-2.0V or less to CTLC pin, the COUT pin outputs “High” level. Enabling/ disabling of this function in the shutdown state is user- selectable. Delay Shortening (DS) Applying the voltage of V DD+1.0 V or more to the CTLC pin can shorten the overcharge detection delay time to a few millisecond (ms). Setting for 2- to 4-Cell Protection By short-circuiting between cells, the device can meet as a protection IC for 2- / 3- / 4-cell placed in series. The following table indicates pins to short-circuit to VSS depending on cells protected. Protected Cells Short-circuited Pins to VSS 2-cell Protection VC3 and VC4 pins 3-cell Protection VC4 pin 4-cell Protection None (No short circuit) Delay Shortening Mode COUT：H Normal Mode VDD+0.0V VDD-2.0V VDD+1.0V VCTLC VDD+0.2V VDD-1.0V

NO.EA-426-250728

APPLICATION INFORMATION

Typical Application Circuits 4-cell Protection Circuit 3-cell Protection Circuit CVDD R5641L VDD VC1 VC2 VC3 VC4 CELL1 CELL2 CELL3 VSS CELL4 CTLC COUT Normal Output: ”Low” “High” Active SC PROTECTOR RVDD CVDD R5641L VDD VC1 VC2 VC3 VC4 CELL1 CELL2 CELL3 VSS CTLC COUT Normal Output: ”Low” “High” Active SC PROTECTOR RVDD

NO.EA-426-250728 2-cell Protection Circuit ∗ If using a PTC, connect the battery directly behind the PTC. Temperature Protection Circuit CVDD R5641L VDD VC1 VC2 VC3 VC4 CELL1 CELL2 VSS CTLC COUT Normal Output : ”Low” “High” Active SC PROTECTOR RVDD CVDD R5641L VDD VC1 VC2 VC3 VC4 CELL1 CELL2 CELL3 VSS CELL4 CTLC COUT Normal Output: ”Low” “High” Active SC PROTECTOR RVDD PTC∗

NO.EA-426-250728 External Components Symbol Typ. Permissible Range Unit RVDD 100 100 to 1000 Ω R1 / R2 / R3 / R4 330 330 to 1000 Ω CVDD 0.1 0.1 to 1.0 µF C1 / C2 / C3 / C4 0.1 0.01 to 1 µF Technical Notes on Component Selection

  • R VDD and C VDD stabilize the voltage fluctuation. The IC might occur a malfunction by a current flowed depending on the battery voltage fluctuation when RVDD is small, and it might occur an unexpected malfunction by a current flowed depending on the supply power voltage fluctuation when RVDD is big. To make the IC stable, please connect a resistor and a capacitor within the permissible range to each of RVDD and CVDD.
  • R1 to R4 resistors and C1 to C4 capacitors stabilize the voltage fluctuation. Since increasing their resistors make the detection voltage be higher by the conduction current at detection, the appropriate value of R1 to R4 must be less than 1kΩ. And, the appropriate value of C1 to C4 must be 0.01µF or more in order to make a stable operation of the IC.
  • The typical application circuits are just examples and do not guarantee the operation. Conduct the sufficient evaluation in the actual application circuit in order to select external components.
  • The protection IC and external components must not be applied overvoltage and overcurrent beyond the absolute maximum ratings. Especially, after detecting overcharge, a large heater current might flow through the MOSFET during the fuse blowout time. To prevent the MOSFET from being burnt, select a MOSFET with considering a current capacity of it. To connect the SC protector, connect the SC protector to the cell must be the last. Contact Information for Inquiries regarding SC PROTECTOR Dexerials Corporation (Sony Chemical & Information Device Company Ltd.) URL: http://www.dexerials.jp

NO.EA-426-250728 TECHNICAL NOTES A peripheral component or the device mounted on PCB should not exceed a rated voltage, a rated current or a rated power. When designing a peripheral circuit, please be fully aware of the following points.

  • Please evaluate the product at the PCB level before use, as some symptoms may remain that cannot be confirmed by the evaluation at the IC level.
  • When using any coating or underfill to improve moisture resistance or joining strength, evaluate them adequately before using. In certain materials or coating conditions, corrosion by contained constituents, current leakage by moisture absorption, crack and delamination by physical stress can happen. If the curing temperature of the coating material or underfill material exceeds the absolute maximum rating, the electrical characteristics of this product may change.
  • When performing X -ray inspection in mass production process and evaluation build stage such as the product functions and characteristics confirmation, please confirm X-ray irradiation does not exceed 1.5Gy (absorbed dose for air).

Ver.G i : Product Code … Refer to Part Marking List : Lot Number … Alphanumeric Serial Number R5641L (DFN2020-8C) Part Markings NOTICE There can be variation in the marking when different AOI (Automated Optical Inspection) equipment is used. In the case of recognizing the marking characteristic with AOI, please contact our sales or distributor before attempting to use AOI. R5641Lxxxxx Part Marking List Product Name     R5641L301CC FZ01 R5641L303BD FZ02 R5641L304BD FZ03 R5641L252AF FZ0 4 R5641L302BD FZ0 5 R5641L306BC FZ0 6 R5641L307BC FZ07 R5641L303BC FZ08 R5641L352CC F Z09 R5641L255AF FZ10 R5641L308CC FZ1 1 ①②③ ④⑤⑥ 1 4

POWER DISSIPATION DFN2020-8C Ver. A i The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following measurement conditions are based on JEDEC STD. 51-7. Measurement Conditions Item Measurement Conditions Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Four-Layer Board) Board Dimensions 76.2 mm × 114.3 mm × 0.8 mm Copper Ratio Outer Layer (First Layer): Less than 95% of 50 mm Square Inner Layers (Second and Third Layers): Approx. 100% of 50 mm Square Outer Layer (Fourth Layer): Approx. 100% of 50 mm Square Through-holes  0.3 mm × 23 pcs Measurement Result (Ta = 25°C, Tjmax = 125°C) Item Measurement Result Power Dissipation 1400 mW Thermal Resistance (ja) ja = 71°C/W Thermal Characterization Parameter (ψjt) ψjt = 34°C/W ja: Junction-to-Ambient Thermal Resistance ψjt: Junction-to-Top Thermal Characterization Parameter Power Dissipation vs. Ambient Temperature Measurement Board Pattern 200 400 600 800 1000 1200 1400 1600 1800 0 25 50 75 100 125 Power Dissipation (mW) Ambient Temperature (°C) 1400

PACKAGE DIMENSIONS DFN2020-8C Ver. A i ∗ The tab on the bottom of the package shown by blue circle is a substrate potential (GND). It is recommended that this tab be connected t o the ground plane on the board but it is possible to leave the tab floating.

  1. T he products and the product specifications described in this document are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to our sales representatives for the latest information thereon. 2. The materials in this document may not be copied or otherwise reproduced in whole or in part without the prior written consent of us. 3. This product and any technical information relating thereto are subject to complementary export controls (so- called KNOW controls) under the Foreign Exchange and Foreign Trade Law, and related politics ministerial ordinance of the law. (Note that the complementary export controls are inapplicable to any application-specific products, except rockets and pilotless aircraft, that are insusceptible to design or program changes.) Accordingly, when exporting or carrying abroad this product, follow the Foreign Exchange and Foreign Trade Control Law and its related regulations with respect to the complementary export controls. 4. The technical information described in this document shows typical characteristics and example application circuits for the products. The release of such information is not to be construed as a warranty of or a grant of license under our or any third party's intellectual property rights or any other rights. 5. The products listed in this document are intended and designed for use as general electronic components in standard applications (office equipment, telecommunication equipment, measuring instruments, consumer electronic products, amusement equipment etc.). Those customers intending to use a product in an application requiring extreme quality and reliability, for example, in a highly specific application where the failure or misoperation of the product could result in human injury or death should first contact us.
  • Aerospace Equipment
  • Equipment Used in the Deep Sea
  • Power Generator Control Equipment (nuclear, steam, hydraulic, etc.)
  • Life Maintenance Medical Equipment
  • Fire Alarms / Intruder Detectors
  • Vehicle Control Equipment (automotive, airplane, railroad, ship, etc.)
  • Various Safety Devices
  • Traffic control system
  • Combustion equipment In case your company desires to use this product for any applications other than general electronic equipment mentioned above, make sure to contact our company in advance. Note that the important requirements mentioned in this section are not applicable to cases where operation requirements such as application conditions are confirmed by our company in writing after consultation with your company. 6. We are making our continuous effort to improve the quality and reliability of our products, but semiconductor products are likely to fail with certain probability. In order to prevent any injury to persons or damages to property resulting from such failure, customers should be careful enough to incorporate safety measures in their design, such as redundancy feature, fire containment feature and fail-safe feature. We do not assume any liability or responsibility for any loss or damage arising from misuse or inappropriate use of the products. 7. The products have been designed and tested to function within controlled environmental conditions. Do not use products under conditions that deviate from methods or applications specified in this datasheet. Failure to employ the products in the proper applications can lead to deterioration, destruction or failure of the products. We shall not be responsible for any bodily injury, fires or accident, property damage or any consequential damages resulting from misuse or misapplication of the products. 8. Quality Warranty 8-1. Quality Warranty Period In the case of a product purchased through an authorized distributor or directly from us, the warranty period for this product shall be one (1) year after delivery to your company. For defective products that occurred during this period, we will take the quality warranty measures described in section 8-2. However, if there is an agreement on the warranty period in the basic transaction agreement, quality assurance agreement, delivery specifications, etc., it shall be followed. 8-2. Quality Warranty Remedies When it has been proved defective due to manufacturing factors as a result of defect analysis by us, we will either deliver a substitute for the defective product or refund the purchase price of the defective product. Note that such delivery or refund is sole and exclusive remedies to your company for the defective product. 8-3. Remedies after Quality Warranty Period With respect to any defect of this product found after the quality warranty period, the defect will be analyzed by us. On the basis of the defect analysis results, the scope and amounts of damage shall be determined by mutual agreement of both parties. Then we will deal with upper limit in Section 8-2. This provision is not intended to limit any legal rights of your company. 9. Anti-radiation design is not implemented in the products described in this document. 10. The X-ray exposure can influence functions and characteristics of the products. Confirm the product functions and characteristics in the evaluation stage. 11. WLCSP products should be used in light shielded environments. The light exposure can influence functions and characteristics of the products under operation or storage. 12. Warning for handling Gallium and Arsenic (GaAs) products (Applying to GaAs MMIC, Photo Reflector). These products use Gallium (Ga) and Arsenic (As) which are specified as poisonous chemicals by law. For the prevention of a hazard, do not burn, destroy, or process chemically to make them as gas or power. When the product is disposed of, please follow the related regulation and do not mix this with general industrial waste or household waste. 13. Please contact our sales representatives should you have any questions or comments concerning the products or the technical information. Official website https://www.nisshinbo-microdevices.co.jp/en/ Purchase information https://www.nisshinbo-microdevices.co.jp/en/buy/