s-8254aazft-tb-g Seiko Instruments Inc., s-8254aazft-tb-g Datasheet
s-8254aazft-tb-g
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s-8254aazft-tb-g Summary of contents
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... Overcharge hysteresis voltage can be selected from a range of 0 steps. (Overcharge hysteresis voltage = Overcharge detection voltage − Overcharge release voltage) *2. Overdischarge hysteresis voltage can be selected from a range of 0 100 mV steps. (Overdischarge hysteresis voltage = Overdischarge release voltage − Overdischarge detection voltage) Applications • ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK S-8254A Series Block Diagram COP 1 MΩ VMP 900 kΩ DOP VINI CDT CCT VSS Remarks 1. Diodes in the figure are parasitic diodes. 2. Numerical values are typical values. 2 DOP, COP VMD VMS Control Circuit Delay Circuit Delay Circuit Delay Circuit ...
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... S-8254AAWFT-TB-G 4.250 ± 0.025 V S-8254AAXFT-TB-G 4.250 ± 0.025 V S-8254AAYFT-TB-G 4.275 ± 0.025 V S-8254AAZFT-TB-G 4.250 ± 0.025 V S-8254ABAFT-TB-G 3.900 ± 0.025 V S-8254ABBFT-TB-G 4.200 ± 0.025 V Remark Please contact our sales office for the products with the detection voltage value other than those specified above ...
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... NC 10 SEL 11 CTL 12 VC4 13 VC3 14 VC2 15 VC1 16 VDD *1. The NC pin is electrically open. The NC pin can be connected to VDD or VSS. 4 16-Pin TSSOP Top view Figure 2 Table 2 FET gate connection pin for charge control (Nch open drain output) Pin for voltage detection between VC1 and VMP (Pin for overcurrent 3 ...
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... Board size : (2) Board name : JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Figure 3 Power Dissipation of Package (When Mounted on Board) ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK S-8254A Series Electrical Characteristics Item [ DETECTION VOLTAGE ] Overcharge detection voltage Overcharge release voltage Overdischarge detection voltage Overdischarge release voltage Overcurrent detection voltage 1 Overcurrent detection voltage 2 ...
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... DOP pin source current DOP pin sink current *1. Voltage temperature coefficient 1 : Overcharge detection voltage *2. Voltage temperature coefficient 2 : Overcurrent detection voltage 1 *3. Since products are not screened at high and low temperature, the specification for this temperature range is guaranteed by design, not tested in production. Table Symbol ...
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... Voltage “H”, SEL Input Voltage “L” (Test circuit 2) Confirm that the COP pin and DOP pin are low ( the CDT pin is open, and 3.5 V (this status is referred to as the initial status). SS 2.1 Overcharge Detection Voltage (V The overcharge detection voltage (V × ...
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... Apply the initial status and confirm that the DOP pin is “H”. The SEL input voltage “L” the voltage of the SEL pin when the voltage at the DOP pin is “L” after the SEL voltage has SELL been gradually decreased. The SEL input voltage “H” (V voltage of the DOP pin is “ ...
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... Ether the 0 V battery charge starting charger voltage or the 0 V battery charge inhibition battery voltage is applied to each product according to the 0 V battery charging function. 4 Battery Charge Starting Battery Charger Voltage (V Function) The starting condition for a product in which 0 V battery charging is available. The COP pin voltage should be lower than max ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK Rev.4.3 _00 5.6 COP Pin Leakage Current (I The COP pin sink current (I after the initial status. After that, the current that flows through the COP pin when and V is the COP pin leakage current (I COP DD 5 ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK S-8254A Series S-8254A 1 COP VDD 2 VMP VC1 3 DOP VC2 4 VINI VC3 5 CDT VC4 6 CCT CTL VSS SEL 0.1 µ 0.1 µF Figure 6 Test Circuit 3 S-8254A 1 COP VDD 2 VMP VC1 3 DOP VC2 4 VINI ...
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... After discharging is stopped due to the overdischarge status, the S- 8254A Series enters the power-down status. 4. Power-down Status When discharging has stopped due to the overdischarge status, the VMP pin is pulled down to the V level by the R resistor. When the VMP pin voltage is lower than V VMS the power-down status ...
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... IOV1 which the DOP pin voltage becomes V COP pin becomes high impedance and is pulled up to the EB+ pin voltage to turn off the charging FET to stop charging, and the VMP pin is pulled up to the V of overcurrent detection level 2 (V ...
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... When the SEL pin is low, overdischarge detection of the V4 cell is prohibited and an overdischarge is not detected even if the V4 cell is shorted, therefore, the V4 cell can be used for 3-cell protection. The SEL pin takes precedence over the battery protection circuit. Use the SEL pin at high or low. ...
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... V SS Charger connection Load connection Overcharge connection delay time (t *1 Mode *1. < 1 > : Normal mode < 2 > : Overcharge mode < 3 > : Overdischarge mode Remark The charger is assumed to charge with a constant current. V the charger. 16 High-Z ) Overdischarge connection delay time (t CU <1> <2> Figure 9 Seiko Instruments Inc. ...
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... VINI pin voltage IOV2 V IOV1 V SS Load connection Overcurrent 1 detection delay time (t *1 Mode *1. < 1 > : Normal mode < 2 > : Overcurrent mode Remark The charger is assumed to charge with a constant current. V the charger High-Z Overcurrent 2 detection ) delay time (t IOV1 <1> <2> <1> ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK S-8254A Series Battery Protection IC Connection Example 1. 3-serial Cell Charging FET EB VMP COP R VINI C CDT EB− 2. 4-serial Cell Charging FET EB VMP COP R VINI C CDT EB− 18 Discharging FET R DOP S-8254A 1 COP VDD 2 VMP VC1 3 DOP ...
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... Enough evaluation of transient power supply variation and overcurrent protection function in the actual application is needed to determine the proper constants. Contact our sales office in case the constants should be set to other than 112 µF • Ω has not been confirmed whether the operation is normal or not in circuits other than the above example of connection ...
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... I vs. V PDN DD 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0. Overcharge Detection / Release Voltage, Overdischarge Detection / Release Voltage, Overcurrent Detection Voltage, and Delay Times 2 4.375 4.370 4.365 4.360 4.355 4.350 4.345 4.340 4.335 4.330 4.325 −40 −25 2 2.80 2.78 2.76 2.74 2.72 2.70 2.68 2.66 2 ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK Rev.4.3 _00 2.5 V vs. V IOV1 DD 0.35 0.34 0.33 0.32 0.31 0.30 0.29 0.28 0.27 0.26 0. 2.7 V vs. V IOV2 DD 0.60 0.58 0.56 0.54 0.52 0.50 0.48 0.46 0.44 0.42 0. 2.9 V vs. V IOV3 DD −0.9 −1.0 −1.1 −1.2 −1.3 −1.4 −1 2. CCT 100 10 1 0.1 0.01 0.01 2 [ [ ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK S-8254A Series 2. CDT 10 1 0.1 0.01 0.001 0.01 2.15 t vs. C IOV1 CDT 1 0.1 0.01 0.001 0.0001 0.01 2.17 t vs. Ta IOV2 2.0 1.5 1.0 0.5 0 −40 −25 22 2. [µF] CDT 2. [µF] CDT 2. [°C] Seiko Instruments Inc. vs 200 150 100 50 0 − 40 − ...
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... BATTERY PROTECTION IC FOR 3-SERIAL- OR 4-SERIAL-CELL PACK Rev.4.3 _00 3. COP / DOP Pin 3.1 I vs. V COH COP 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0. 3.3 I vs. V DOH DOP 0 −0.5 −1.0 −1.5 −2.0 −2.5 −3.0 −3.5 −4.0 −4.5 −5.0 0 1.8 3 [V] COP 3.4 I 3.6 5.4 7.2 V [V] DOP Seiko Instruments Inc. S-8254A Series vs ...
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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...