Package Information
| Lead Count (#) | 28 |
| Pkg. Code | LYD |
| Pitch (mm) | 0.5 |
| Pkg. Type | TQFN |
| Pkg. Dimensions (mm) | 5.00 x 5.00 x 0.75 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| RoHS (ISL88731CHRTZ-T) | Download |
| HTS (US) |
Product Attributes
| Lead Count (#) | 28 |
| Carrier Type | Reel |
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range | -10 to +100°C |
| Audible Noise | No |
| Automatic Power Source Selection | No (Set by Host) |
| Automatic Trickle Charge (Typical) | 2.7 |
| Battery Charge Voltage | 2.7 to 19.2 in 16mV Steps |
| Battery Charge Voltage Adjustment | 16mV steps |
| Battery Chemistry | Multi-Cell Li+/Polymer |
| Battery Leakage Current (Max) | 2μA (DCIN=0V, No System Load) |
| Charge Current Limit Accuracy | ±3 |
| Charging Voltage Accuracy (Max) (±%) | 0.5 |
| DC Adapter Detection | No (Set by Host) |
| 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 | 6000 |
| Parametric Category | Battery Charger ICs |
| Pitch (mm) | 0.5 |
| Pkg. Dimensions (mm) | 5.0 x 5.0 x 0.75 |
| Pkg. Type | TQFN |
| Qualification Level | Standard |
| Switching Frequency Range (Typical) (kHz) | 400 - 400 |
| Thickness (mm) | 0.75 |
| Topology [Rail 1] | Fixed Frequency Synchronous Buck |
| Trickle Charge Current Range | 64mA to 220mA |
| Width (mm) | 5 |
Description
The ISL88731C is a highly integrated Lithium-ion battery charger controller, programmable over the SMBus system management bus (SMBus). The ISL88731C is intended to be used in a smart battery charger (SBC) within a smart battery system (SBS) that throttles the charge power such that the current from the AC-adapter is automatically limited. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation for enhanced light load efficiency and system bus boosting prevention. The ISL88731C charges one to four Lithium-ion series cells, and delivers up to 8A charge current. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy with 10mΩ sense resistors. The ISL88731C provides 0. 5% end-of-charge battery voltage accuracy. The ISL88731C provides a digital output that indicates the presence of the AC adapter as well as an analog output which indicates the adapter current within 4% accuracy. The ISL88731C is available in a small 5mmx5mm 28 Ld Thin (0. 8mm) QFN package. An evaluation kit is available to reduce design time. The ISL88731C is available in Pb-Free packages.