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SABMB910026 Datasheet(PDF) 3 Page - Advanced Linear Devices |
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SABMB910026 Datasheet(HTML) 3 Page - Advanced Linear Devices |
3 / 4 page SABMB16/SABMB810025/SABMB910025 Advanced Linear Devices, Inc. 3 of 4 SABMB8100XX/SABMB9100XX SUPERCAPACITOR AUTO BALANCING PCB maximizing any energy harvesting gathering efforts. The SAB MOSFET would not become active until the supercapacitor is already charged to over 90% of its max. rated voltage. The trickle charging of supercapacitors with energy harvesting techniques tends to work well with SAB MOSFETs as charge balancing devices, as it is less likely to have high transient energy spurts resulting in excessive voltage or current excursions. If an energy harvesting source only provides a few µA of current, the power budget does not allow wasting any of this current on capacitor leakage currents and power dissipation of resistor or operational amplifier based charge-balancing circuits. It may also be important to reduce long term leakage currents, as energy harvesting charging at low levels may take up to many days. In summary, in order for an energy harvesting application to be successful, the input energy harvested must exceed all the energy required due to the leakages of the supercapacitors and the charge- balancing circuits, plus any load requirements. With their unique balancing characteristics and near-zero charge loss, SAB MOSFETs are ideal devices for use in supercapacitor charge- balancing in energy harvesting applications. BATTERY POWERED APPLICATIONS Many battery powered circuits that also require supercapacitor at its output to boost power output can benefit from using SAB MOSFETs for supercapacitor balancing. As previously described, the additional power burn by using SAB MOSFETs for supercapacitor stack balancing can be negative, meaning that adding SAB MOSFETs can not only not burn extra power, but can actually save supercapacitor leakage current and associated power dissipation. Applications that depend on long life battery usage must take into account the supercapacitor leakage current and balancing circuit power burn because the currents involved are steady state DC currents that are continuous throughout the lifetime of the application and its battery life. The average power dissipation of addition of SABMB16 board is zero, provided the selection of the operating voltages and SAB MOSFETs are appropriate for the leakage currents of the supercapacitors specified. For more information on the CHARACTERISTICS OF SUPERCAPACITOR AUTO BALANCING (SABª) MOSFETS, please refer to the document: ALD8100XX/ALD9100XX FAMILY of SUPERCAPACITOR AUTO BALANCING (SABTM) MOSFET ARRAYS and individual datasheet of each of the SAB MOSFETs. SABMB16 PCB CONNECTION TO SUPERCAPACITORS C1, C2, C3, C4 C1 C2 C3 C4 A A B B C C D D E E V R R U U V V TO NEXT BOARD V V TO NEXT BOARD V C1 C2 C3 C4 A A B B C C D D E E V R R U U V V TO NEXT BOARD V V TO NEXT BOARD V * Magnified, not to scale |
Similar Part No. - SABMB910026 |
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Similar Description - SABMB910026 |
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