1 Cell Battery Protection IC with a charging electric electricity flow detection voltage accuracy ± 0.75 mV: Corresponds to the task of fast charging needs for smartphones
Abrick was a charging / discharge overloaded voltage accuracy ± 0 on September 28, 2021 (the company) on September 28, 2021..The company has started selling the S-82P1A Series and S-82P1B Series, one cell battery protection IC that achieved 75MV.We aim to sell 300 million in the next three years, mainly for high -end smartphone battery circuits.The sample price is 120 yen.
Supporting the issues of smartphones that increase the capacity and quick charging needs
S-82P1Aシリーズ 出所：エイブリックIn recent years, smartphones have tended to be equipped with large -capacity lithium -ion batteries with high functionality, and the need for quick charging has increased the demand for increasing charging current.However, when the charging current increases, the heat generation of the current detection resistor on the protection circuit substrate increases, so that the resistance value of the current detection resistor is reduced to reduce the heat generation.
However, simply lowering only the resistance value will increase the variation in the detected current value, making it difficult to ensure safety.The S-82P1A / S-82P1B series developed by the company has a charging / discharge overload detection voltage accuracy of ± 0 (the company)..The high -precision to 75MV has made it possible to respond to these issues.In addition, the overcharge detection voltage accuracy is ± 15 mV, which is "industry top class" (the company).
The specific contents are described in the example of a general high -end smartphone battery pack circuit (figure below).As shown in the equation in the figure below, the overcurrent detection voltage accuracy that is currently being used often in the market is ± 1..In the case of a 5MV protective IC, simply simply the 3mΩ current detection resistance 1.If you change to a 5mΩ one, the maximum and minimum value of the detected current value will be widened, and the maximum heat generation will not be reduced by half.In the S-82P1A / S-82P1B series, charging / discharge overload detection voltage accuracy ± 0.Since the new 75mV has been achieved, the variation in detected current values can be reduced and the maximum heat generated can be reduced by half.
一般的なハイエンドスマホの電池パック回路の例で、2つの保護ICを用いた2重保護回路となっている。充電、放電時には回路内のFETや電流検出抵抗が発熱元となるため、その抵抗値を下げることが求められるが、電流検出抵抗は単純に抵抗値だけ下げてしまうと弊害が出る。（5）の式のように、S-82P1A/S-82P1Bシリーズではその課題を解決している［クリックで拡大］ 出所：エイブリックIn the request of the battery pack of the corresponding safety standard "IEC (UL) 62368", "If the discharge current of 8A or more flows, the current must be cut off within 5 seconds" (Limited Power Source: LPS).There is.
This is also as shown in the figure below, the overcurrent detection voltage accuracy is ± 1..In the case of a 5MV protective IC, simply simply the 3mΩ current detection resistance 1.If you change to a 5mΩ one (the discharge overload detection voltage is 22 mV for the former, the latter is set to 11 mV), the maximum detected current value is 8..It becomes 3A and the standard cannot be satisfied.In this case, the discharge overload detection detection voltage setting was reduced to 10 MV, but it is said that the S-82P1A / S-82P1b series can be cleared as 11 mV.
安全規格への対応について。2重保護回路が必要な他、8A以上の放電電流が流れた場合に5秒以内に電流を遮断する必要がある。（10）がS-82P1A／S-82P1Bシリーズを用いた場合の式だ［クリックで拡大］ 出所：エイブリックThe S-82P1A series also has a CTL terminal, and it is possible to forcibly stop the battery pack by entering an external signal.As a specific application, it is possible to realize the overheating function by connecting a PTC thermistor.
In addition, the main specifications of the S-82P1A / S-82P1B series are as shown in the table below.
| 過充電検出電圧 | 3.50〜4.80V ±15mV |
|---|---|
| 過放電検出電圧 | 2.00〜3.00V ±50mV |
| 放電過電流検出電圧1 | 0.003〜0.100V ±0.75mV |
| 放電過電流検出電圧2 | 0.006〜0.100V ±2mV |
| 負荷短絡検出電圧 | 0.020〜0.100V ±5mV |
| 充電過電流検出電圧 | −0.100〜−0.003V ±0.75mV |
| 動作時消費電流 | 最大4.0µA |
| パワーダウン時消費電流 | 最大50nA |
| 最大定格 | 28V |
| 動作温度 | −40〜＋85℃ |
| パッケージ | S-82P1Aシリーズ：HSNT-8（1616）1.6×1.6×t0.4mm max. S-82P1Bシリーズ：SNT-6A 1.57×1.8×t0.5mm max. |
The company also aims to be equipped with tablet terminals, headsets, smartwatches, activity meters, and wireless earphones, while making the main target of high -end smartphones, which are increasingly battery capacity.
The person in charge of this high -precision said, "It is due to the accumulation of the know -how of circuit technology and inspection measurement technology..Although small improvements such as a few mm bolt, it was possible for the first time by the accumulation of our daily experiments. "It is said that the company is continuing to develop for further accuracy.