The ISL6251, ISL6251A is a highly integrated battery charger controller for Li-Ion/Li-Ion polymer batteries and NiMH batteries. High efficiency is achieved by a synchronous buck topology and the use of a MOSFET, instead of a diode, for selecting power from the adapter or battery. The low side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting. The constant output voltage can be selected for 2, 3 and 4 series Li-Ion cells with 0. 5% accuracy over-temperature. It can be also programmed between 4. 2V+5%/cell and 4. 2V-5%/cell to optimize battery capacity. When supplying the load and battery charger simultaneously, the input current limit for the AC adapter is programmable to within 3% accuracy to avoid overloading the AC adapter, and to allow the system to make efficient use of available adapter power for charging. It also has a wide range of programmable charging current. The ISL6251, ISL6251A provides outputs that are used to monitor the current drawn from the AC adapter, and monitor for the presence of an AC adapter. The ISL6251, ISL6251A automatically transitions from regulating current mode to regulating voltage mode.
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| Type | Title | Date |
| Datasheet | PDF 1.04 MB | |
| End Of Life Notice | PDF 603 KB | |
| Product Change Notice | PDF 326 KB | |
| Product Change Notice | PDF 106 KB | |
| Product Change Notice | PDF 173 KB | |
| Product Change Notice | PDF 111 KB | |
| Application Note | PDF 509 KB | |
| Application Note | PDF 397 KB | |
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| iSim:PE Offline Simulation Tool iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs.
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Simulator | Renesas |
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The ISL6251EVAL1Z QSOP evaluation board is used to demonstrate the performance of the ISL6251 low cost multi-chemistry battery charger controller.
The ISL6251 is a...
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
| QSOP | Tube | 1000 | ||
| QSOP | Reel | 2500 | ||
| QFN | Reel | 6000 |
