s-8264a Seiko Instruments Inc., s-8264a Datasheet
s-8264a
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s-8264a Summary of contents
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... Lithium-ion rechargeable battery packs (for secondary protection) Packages Package Name SNT-8A 8-Pin TSSOP The S-8264A/B Series is used for secondary protection of lithium-ion high-accuracy voltage detection circuit and a delay circuit. Short-circuits between cells accommodate series connection of two to four cells. Accuracy : ±25 mV (+25°C), Accuracy : ±30 mV (−5°C to +55°C) CMOS output active “ ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Block Diagrams (1) S-8264A Series VDD SENSE VC1 VC2 VC3 VSS CTL Remark The diodes in the figure are parasitic diodes. 2 Overcharge detection comparator 1 + − Reference voltage 1 Overcharge detection comparator 2 + − Reference voltage 2 ...
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... The diodes in the figure are parasitic diodes. Overcharge detection comparator 1 + − Reference voltage 1 Overcharge detection comparator 2 + − Reference voltage 2 Control Overcharge logic detection comparator 3 + − Reference voltage 3 Overcharge detection comparator 4 + − Reference voltage 4 UVLO Figure 2 Seiko Instruments Inc. S-8264A/B Series Oscillator Overcharge detection/release delay circuit SR latch CO 3 ...
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... SNT-8A, tape product T8T1 : 8-Pin TSSOP, tape product *2 Serial code Sequentially set from Product type A : Without CO pin output latch function B : With CO pin output latch function Table 1 S-8264A Series Overcharge Hysteresis ] Voltage [ −0.39 ±0.16 V −0.39 ±0.16 V −0.39 ±0.16 V −0.39 ±0.16 V − ...
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... Negative voltage connection pin of battery 3 5 VC3 Positive voltage connection pin of battery 4 Negative power input pin 6 VSS Negative voltage connection pin of battery 4 CO output control pin (S-8264A Series) 7 CTL Overcharge detection latch reset pin (S-8264B Series FET gate connection pin for charge Pin No. ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Absolute Maximum Ratings Item Input voltage between VDD and VSS Input pin voltage CO output pin voltage SNT-8A Power dissipation 8-Pin TSSOP Operation ambient temperature Storage temperature *1. When mounted on board [Mounted board] 114.3 mm × ...
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... V V CTL 3.5 V, −0. CTL = V + 0.5 V 0.4 V COP − 0 COP DD CUn) Seiko Instruments Inc. S-8264A/B Series (Ta = 25°C unless otherwise specified) Typ. Max. Unit Condition V + 0.025 V V CUn CUn + 0.030 CUn CUn −0. HCn ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series 2. Detection Delay Time (1) S-8264AAA, S-8264AAB, S-8264AAC, S-8264AAE, S-8264BAA, S-8264BAB Item Symbol DELAY TIME Overcharge detection delay t CU time Overcharge timer reset t TR delay time Overcharge release delay t CL time CTL pin response time ...
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... The overcharge timer reset delay time (t (4) Test Condition 4, Test Circuit 2 In the S-8264A Series, set V1, V2, V3, and V4 to 3.5 V and The CTL pin response time (t from when V5 reaches 0 V after moment of time (within 10 µs) decreased down when CO becomes “ ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series (6) Test Condition 6, Test Circuit 2 Set V1, V2, V3, and V4 to 3.5 V and The CTL input “H” voltage ( “L” after V5 has been gradually increased. Next, set The CTL input “L” voltage (V voltage of V5 when CO is “ ...
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... Figure 6 Seiko Instruments Inc. S-8264A/B Series S-8264A/B Series VDD CO SENSE CTL V5 VC1 VSS V4 VC2 VC3 Test Circuit 2 S-8264A/B Series VDD CO A SENSE CTL VC1 VSS V4 VC2 VC3 Test Circuit S-8264A/B Series VDD CO SENSE CTL VC1 VSS A V4 ...
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... Attaching FET to the CO pin provides charge control and a second protection. In the S-8264A Series, if the voltage of all the batteries decreases below the total of the overcharge detection voltage (V ) and the overcharge hysteresis voltage (V CU longer, CO becomes “ ...
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... CTL Pin The S-8264A/B Series has a control pin. The CTL pin is used to control the output voltage of the CO pin. In the S-8264A Series, the CTL pin takes precedence over the overcharge detection circuit. In the S-8264B Series, when the CTL pin is switched from “L” to “H”, a reset signal is output to the overcharge detection latch and CO becomes “ ...
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... VDD pin voltage is decreased to the same voltage as that of the SENSE pin. When CO becomes “H” when the delay time has elapsed after overcharge detection, the latch for retaining the test mode is reset and the S-8264A/B Series exits from the test mode. VDD pin voltage ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) Rev.2.0 _00 Timing Charts Operation 1. Overcharge Detection (1) S-8264A Series V HCn V CUn Battery voltage ( CTL pin CO pin t (2) S-8264B Series V HCn V CUn Battery voltage ( CTL pin CO pin shorter ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series 2. Overcharge Timer Reset Operation V CUn Battery voltage ( pin 16 V HCn longer TR shorter shorter Timer reset Figure 11 Seiko Instruments Inc shorter Rev.2.0 _00 ...
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... Set C4, and C satisfied the S-8264A Series, normally input “H” to the external input, and input “L” when setting CO to “H”. In the S-8264B Series, normally input “L” to the external input, and input “H” when releasing the latch that maintains CO at “ ...
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... Set C3, and CVDD so that the condition (R1 to R3) × (C1 to C3, CVDD) ≥ 1 × 10−4 is satisfied the S-8264A Series, normally input “H” to the external input, and input “L” when setting CO to “H”. In the S-8264B Series, normally input “L” to the external input, and input “H” when releasing the latch that maintains CO at “ ...
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... Set R1, R2, C1, C2, and CVDD so that the condition (R1 or R2) × (C1 or C2, CVDD) ≥ 1 × 10−4 is satisfied the S-8264A Series, normally input “H” to the external input, and input “L” when setting CO to “H”. In the S-8264B Series, normally input “L” to the external input, and input “H” when releasing the latch that maintains CO at “ ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Precautions • Do not connect batteries charged with more, “H” may be output at CO after all pins are connected • In some application circuits, even if an overcharged battery is not included, the order of connecting batteries may be restricted to prevent transient output of CO detection pulses when the batteries are connected ...
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... A pull-down resistor is included in the CTL pin. To perform overheat protection via the PTC in the S-8264A Series, connect the PTC before connecting batteries. 3. When the power fluctuation is large, connect the power supply of the PTC to the VDD pin of the S-8264A Series. 4. Since “ ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Characteristics (Typical Data) 1. Detection Voltage vs. Temperature (1) Overcharge Detection Voltage vs. Temperature 4.40 4.35 4.30 4.25 4.20 −40 − [°C] 2. Current Consumption vs. Temperature (1) Current Consumption during Normal Operation vs. Temperature 4.0 3.0 2.0 1.0 0.0 −40 − [°C] 3. Delay Time vs. Temperature (1) Overcharge Detection Delay Time vs. Temperature 6 ...
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... CO Pin Source Current vs ° C 1000 700 500 250 (2) CTL Pin Input Resistance vs. Temperature 14.0 12.0 10.0 8.0 6 Seiko Instruments Inc. S-8264A/B Series ° [ −40 − [° ...
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... BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8264A/B Series Marking Specifications (1) SNT-8A SNT-8A Top view Product name vs. Product code Product name S-8264AAA-I8T1G S-8264AAB-I8T1G S-8264AAC-I8T1G S-8264AAD-I8T1G S-8264AAE-I8T1G S-8264AAF-I8T1G S-8264AAG-I8T1G (2) 8-Pin TSSOP 8-Pin TSSOP Top view 1 (1) (2) (3) (4) (5) (6) (7) (8) ...
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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 ...