SMBus Interfaced Battery Charger With Internal FETs
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ISL95871C Product Details
SMBus Interfaced Battery Charger With Internal FETs The ISL95871C is a highly integrated Lithium-ion battery charger controller, programmable over the System Management Bus (SMBus) with internal switching FETs. 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 ISL95871C charges one to four Lithium-ion series cells, and delivers up to 8A charge current. Integrated MOSFETs and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy with 10m? sense resistors. The ISL95871C provides 0.5% battery voltage accuracy.SMBus Interfaced Battery Charger with Internal FETs
The is a highly integrated Lithium-ion battery charger controller, programmable over the System Management Bus (SMBus) with internal switching FETs. 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 ISL95871C charges one to four Lithium-ion series cells, and delivers to 8A charge current. Integrated MOSFETs and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy with 10m sense resistors. The ISL95871C provides 0.5% battery voltage accuracy. The ISL95871C also 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.Features
Internal Synchronous Buck Output Stage Power FETs 0.5% Battery Voltage Accuracy 3% Adapter Current Limit Accuracy 3% Charge Current Accuracy SMBus 2-Wire Serial Interface Battery Short Circuit Protection Fast Response for Pulse-Charging Fast System-Load Transient Response Monitor Outputs - Adapter Current (3% Accuracy) - AC-Adapter Detection 11-Bit Battery Voltage Setting 6 Bit Charge Current/Adapter Current Setting 8A Maximum Battery Charger Current 11A Maximum Adapter Current to +22V Adapter Voltage Range Pb-Free (RoHS Compliant)Applications
Notebook Computers Tablet PCs Portable Equipment with Rechargeable Batteries
FIGURE 1. EFFICIENCY vs CHARGE CURRENT AND BATTERY VOLTAGE (EFFICIENCY DCIN = 20V)
FIGURE 2. DERATING CURVE WITH NATURAL AIR FLOW (MEASURED x 10cm EVALUATION BOARD)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
PIN NUMBER SYMBOL AGND ACOK DESCRIPTION Analog Ground. Connect directly to the backside paddle. Connect to PGND and the system ground plane under the IC. AC-Adapter Detection Output. This open drain output is high impedance when ACIN is greater than 3.2V. The ACOK output remains low when the ISL95871C is powered down. Connect a 10k pull-up resistor from ACOK to VDDSMB. Range: to 5V. Battery Voltage Remote Sense. Connect to the battery pack positive terminal. Charge Current-Sense Negative Input. Range: zero to battery voltage. Charge Current-Sense Positive Input. Range: zero to battery voltage. Charger Bias Supply Input. Bypass DCIN with a 0.1�F capacitor to AGND. Range: zero to adapter voltage. No Connection. Pins and 50 are not connected. Linear Regulator Output. VDDP is the output of the 5.2V linear regulator supplied from DCIN. VDDP also directly supplies the LFET gate driver and the BOOT strap diode. Bypass with a 1�F ceramic capacitor from VDDP to PGND. Range: zero to 5.3V. Output inductor connection. Connected to the source of the internal high-side N-Channel MOSFET Source and low-side N-Channel MOSFET Drain. Range: 1 diode drop below ground to 1 diode drop above adapter voltage. Power Ground. Connect PGND to the source of the low side MOSFET and to the system ground plane.
PIN NUMBER SYMBOL VIN DESCRIPTION Power input to the switching FETs connected to the drain of internal upper FET. A very low ESR capacitor should be place from the VIN pins to the PGND pins. Range: Min battery voltage to adapter voltage. Upper Gate of the internal power FET. A 4700pF cap must be placed between UGATE and PHASE. Range: 1 diode drop below ground to 5.3V above adapter voltage. High-Side Power MOSFET Driver Power-Supply Connection. Connect a 0.1�F capacitor from BOOT to PHASE. Range: 1 diode drop below ground to 5.3V above adapter voltage. Power input for internal analog circuits. Connect a 4.7 resistor from VDD to VDDP and a 1�F ceramic capacitor from VDD to AGND. Range: to 5.3V. Input Current-Sense Negative Input. Range: battery voltage to adapter voltage. Input Current-Sense Positive Input. Range: battery voltage to adapter voltage. AC-Adapter Detection Input. Connect to a resistor divider from the AC-adapter output. Output switching is disabled when ACIN is below it threshold. The divider should be designed to pull ACIN above its threshold when the adapter voltage is above battery voltage. Range: 5V. 3.2V internal reference voltage. Place a 0.1�F ceramic capacitor from VREF to AGND pin close to the IC. Compensation Point for the charging current and adapter current regulation Loop. Connect 0.01�F to AGND. See the "Charge Current Control Loop" on page 20 for details of selecting the ICOMP capacitor. Range: to 5.3V. Compensation Point for the voltage regulation loop. Connect a resistor in series with a small ceramic capacitor to AGND, typically 4.7k in series with 0.01�F. See "Voltage Control Loop" on page 21 for details on selecting VCOMP components. Range: to 5V. Input Current Monitor Output. ICM voltage equals 20 x (VCSIP - VCSIN). Range: to 5V. SMBus Data I/O. Open-drain Output. Connect an external pull-up resistor according to SMBus specifications. Range: to 5V. SMBus Clock Input. Connect an external pull-up resistor according to SMBus specifications. Range: to 5V. SMBus interface Supply Voltage Input. Bypass with a 0.1�F capacitor to AGND. Range: to 5V.
Back Side Paddles 5 terminals on the back side of the package provide additional electrical and thermal connection to ISL95871C AGND, VDDP, UGATE, PHASE and VIN. PHASE and VIN paddles are the lowest thermal resistance from the switching MOSFETs and should relatively large areas of copper to have low thermal resistance from the FETs to the PCB and the ambient air. The AGND paddle is the lowest thermal resistance from the control IC and should be connected to a relatively large area of copper to have low thermal resistance from the FETs to the PCB and the ambient air.
PART NUMBER (Notes 3) ISL95871CHRZ NOTES: 1. Add "-T" suffix for Tape and Reel. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pbfree requirements of IPC/JEDEC STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL95871C. For more information on MSL please see techbrief TB363. PART MARKING ISL 95871CHRZ TEMP RANGE (�C) to +100 PACKAGE (Pb-Free) Ld 5x7 QFN PKG. DWG. # L50.5x7
|Manufacturer||INTERSIL||RoHs Status||Lead free / RoHS Compliant|
|Packing||Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube||Package/Case|
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Estimated Delivery Time: Jan 27 - Feb 01 days (choose Expedited at checkout).
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1.We provide 90 days warranty.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
- Q: How does Jotrin guarantee that ISL95871C is the original manufacturer or agent of INTERSIL?
- We have a professional business development department to strictly test and verify the qualifications of INTERSIL original manufacturers and agents. All INTERSIL suppliers must pass the qualification review before they can publish their ISL95871C devices; we pay more attention to the channels and quality of ISL95871C products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
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- The INTERSIL's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for ISL95871C, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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- Q: What is the process for returns or replacement of ISL95871C?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment.
If there is something wrong with the ISL95871C we delivered, we will accept the replacement or return of the ISL95871C only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of ISL95871C.
(3)The ISL95871C is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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Intersil Corporation (Renesas Electronics)
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