Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | QFN |
| Pkg. Code: | LXW |
| Lead Count (#): | 28 |
| Pkg. Dimensions (mm): | 5.00 x 5.00 x 0.90 |
| Pitch (mm): | 0.5 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| ECCN (US) | |
| HTS (US) |
Product Attributes
| Lead Count (#) | 28 |
| Carrier Type | Tube |
| Moisture Sensitivity Level (MSL) | 3 |
| Pitch (mm) | 0.5 |
| Pkg. Dimensions (mm) | 5.0 x 5.0 x 0.90 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range (°C) | -10 to +100°C |
| Audible Noise | No |
| Automatic Power Source Selection | No |
| Automatic Trickle Charge (Typical) | No (Set by Host) |
| Battery Charge Voltage | 4.2/Cell (2S, 3S, 4S) |
| Battery Charge Voltage Adjustment | ±5/Cell |
| Battery Chemistry | Multi-Cell Li+/Polymer |
| Battery Leakage Current (Max) | 10μA (DCIN=0V, No System Load) |
| Charge Current Limit Accuracy | ±3 (CHLIM=2.0V) |
| Charging Voltage Accuracy (Max) (±%) | 0.5 |
| DC Adapter Detection | No |
| Duty Cycle (%) | 99.9 - 99.9 |
| Input Current Limit Accuracy (% (±)) | 3 |
| Input Voltage (Max) (V) | 25 |
| Input Voltage (Min) (V) | 7 |
| Input Voltage Range (V) | 7 - 25 |
| Length (mm) | 5 |
| MOQ | 600 |
| Parametric Category | Battery Charger ICs |
| Pkg. Type | QFN |
| Qualification Level | Standard |
| Switching Frequency Range (Typical) (kHz) | 300 - 300 |
| Thickness (mm) | 0.9 |
| Topology [Rail 1] | Fixed Frequency Synchronous Buck |
| Trickle Charge Current Range | ±25 (CHLIM=0.2V) |
| Width (mm) | 5 |
Resources for ISL6251A
Description
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.