The ISL95521B is a highly versatile combo battery charger configurable for operating as either a Hybrid Power Boost (HPB) charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or 4-cell batteries. Both configurations allow the battery to work with the adapter to supply the system load when it exceeds the adapter capability, referred to as system Turbo mode. The HPB charger configuration reverse-boosts battery energy to the system bus to help the adapter provide the system power in Turbo mode. The NVDC charger configuration quickly turns on BGATE to enable the battery to help the adapter provide the system power in Turbo mode.
The ISL95521B uses N-channel MOSFETs (NFETs) for all the switches to achieve the best performance and lowest BOM cost. The internal charge pump is capable of turning on all the NFETs fast or slow, depending on the circumstance or the need. The ability to quickly turn on NFETs prevents system bus voltage drop when the battery is suddenly removed in Turbo mode or in Battery Learn mode.
The ISL95521B provides many protection features including a PROCHOT# indicator for system low voltage, adapter overcurrent, battery overcurrent, or overheating, with an array of SMBus programmable parameters for maximum flexibility. It also features a hardware-based adapter-current limit and battery-current limit in addition to SMBus programmable limits.
The ISL95521B provides a high accuracy adapter current monitor, battery current monitor, and system power monitor outputs. To provide maximum flexibility for working with high and low power systems, it provides several configurable current-sense resistor value options to achieve the best trade-off of current sensing accuracy vs power loss.
The ISL95521B uses the Intersil’s Robust Ripple Regulator (R3™) modulation scheme to provide excellent light-load efficiency and fast dynamic response. It is available in a 32 Ld 4x4mm2 QFN package.
IC BATT CHG LI-ION 2-4CELL 32QFN
Charger IC Lithium Ion/Polymer 32-QFN (4x4)
IC BATT CHG LI-ION 2-4CELL 32QFN
IC BATT CHG LI-ION 2-4CELL 32QFN
| Renesas Electronics Corporation | DigiKey | Quarktwin Technology Ltd. | Lingto Electronic Limited | Shenzhen Shengyu Electronics Technology Limited | |
|---|---|---|---|---|---|
| Product Category | Battery Charger ICs | Battery Charger ICs | Battery Charger ICs | Battery Charger ICs | Battery Charger ICs |
| Product Number | ISL95521BIRZ-T | ISL95521BIRZ-T-ND | ISL95521BIRZ-T | ISL95521BIRZ-T | ISL95521BIRZ-T |
| Product Name | Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Combo Battery Charger with SMBus Interface | PMIC - Battery Chargers | Battery Chargers | PMIC - Battery Chargers | Integrated Circuits (ICs) - PMIC - Battery Chargers |
| Features | Over Current Protection | Over Current Protection; Lead-Free | Over Current Protection | Over Current Protection | |
| Package Type | QFNL | 32-VFQFN Exposed Pad | 32-VFQFN Exposed Pad | ||
| Supply Voltage | 4.75 to 25 volts | 25 volts | |||
| Charge Current | 64 to 256 mA | ||||
| Accuracy | 0.5000 % |
