fn8839 rev 0.00 page 1 of 2 april 21, 2016 fn8839 rev 0.00 april 21, 2016 ISL88739 hybrid power boost (hpb) and narrow vdc (nvdc) combo battery ch arger with smbus interface data short to request the full datasheet, please visit www.intersil.com/products/ISL88739 the ISL88739 is a highly versatile combo battery charger configurable for operating as ei ther 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 together to supply the system load when it exceeds the adapter capability, referred to as system turbo mode. hpb charger configuration reverse-boosts battery energy to system bus in order to help the adapter provide the system power in turbo mode. nvdc charger config uration quickly turns on bgate to enable the battery to help adapter provide the system power in turbo mode. the ISL88739 uses n-channel mosfets (nfets) for all the switches to achieve the best performance and lowest bom cost. the internal charge pump is capa ble 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 ISL88739 provides many protection features including prochot# indicator for system lo w voltage, adapter overcurrent, battery overcurrent or overheating, with an array of smbus programmable parameters for maximum flexibility. it also features hardware based adapter current limit and battery-current limit in addition to smbus programmable limits. the ISL88739 provides a high accuracy adapter current monitor, battery current monitor and system power monitor outputs. to provide maximum flexibility for working with high power and low power systems, it provides seve ral configurable current-sense resistor value options to achieve the best trade-off of current sensing accuracy vs power loss. the ISL88739 uses 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 4x4mm 2 qfn package. features ? configurable as hpb charger or nvdc charger ? compliant with intel prochot# requirements ? adapter current monitor and battery discharging current monitor - uses nfet for all the switches - supports removal of battery during battery learn mode - actively controlled inrush current to prevent fet damage ? smbus programmable settings and high accuracy ? comprehensive protection features include - prochot# indicator for system low voltage, adapter overcurrent, battery overcurrent or system overheating - hardware-based adapter-cu rrent and battery-current limits - supports sudden removal of battery in system turbo mode ? 16 switching frequency options from 350khz to 1mhz ?low quiescent current ? smbus and auto-increment i 2 c compatible ? intersil robust ripple regulator (r3?) modulation scheme provides excellent light-load efficiency and fast dynamic response ? 32 ld 4x4mm 2 qfn package ? pb-free (rohs compliant) applications ? devices with rechargeable 2-, 3- or 4-cell batteries figure 1. hpb charger configuration figure 2. nvdc charger configuration l adapter system bgate lgate phase ugate vadp vsys vbat bfet hpb charger cmsrc asgate vbat afet sfet q 1 q 2 prog l adapter bgate lgate phase ugate vadp vsys vbat bfet nvdc charger cmsrc asgate vbat afet sfet q 1 q 2 prog system
fn8839 rev 0.00 page 2 of 2 april 21, 2016 ISL88739 intersil products are manufactured, assembled and tested utilizing iso9001 quality systems as noted in the quality certifications found at www.intersil.com/en/suppor t/qualandreliability.html intersil products are sold by description on ly. intersil may modify the circuit design an d/or specifications of products at any time without notice, provided that such modification does not, in intersil's sole judgment, affect the form, fit or function of the product. accordingly, the reader is cautioned to verify that datasheets are current before placing orders. information fu rnished by intersil is believed to be accu rate and reliable. however, no responsib ility is assumed by intersil or its subsidiaries for its use; nor for any infrin gements of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of intersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com for additional products, see www.intersil.com/en/products.html ? copyright intersil americas llc 2016. all rights reserved. all trademarks and registered trademarks are the property of their respective owners.
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