NCP1871 Narrow Voltage DC Battery Charger The NCP1871 is a NVDC switching battery charger designed for 234 battery cell applications such as ultra books or tablets. It is optimized for use with the mobile computing chipsets, and is also www.onsemi.com compatible with most mobile solutions. The NCP1871 is designed around a full NMOS DC to DC controller that brings down the high voltage charger adapter voltage to a regulated system supply that is in the same range as the battery pack 1 voltage. This limits the variation on the system supply voltage, and QFN20 improves the efficiency of the core converters. The device includes a MN SUFFIX voltage droop monitor, charger adapter validation and blocking as well CASE 485CP as an intelligent battery connection control. The adapter current, charge current and system current are closely monitored and an image MARKING DIAGRAM is provided to the host. The NCP1871 is fully programmable through 2 an I C friendly SMBus Interface. XXXXX XXXXX Features ALYW SMBus Hostcontrolled NVDC1 2S4S Battery Charge Controller Instanton Works with No Battery or Deeply Discharged Battery XXXXX = Specific Device Code A = Assembly Location Automatic Supplement Mode with BATFET Control L = Wafer Lot Battery Removal Sensor Y = Year W = Work Week Programmable Switching Frequency = PbFree Package 2 SMBUS Clock up to 400 kHz (I C compatible) (Note: Microdot may be in either location) Programmable Charge Current, Charge Voltage, Input Current Limit with Interrupt Management 0.5% Charge Voltage Regulation up to 18.08 V PIN CONFIGURATION 3% Input/Charge Current Regulation up to 8.064 A Support Battery LEARN Function Support Shipping Mode and Hard System Reset UltraLow Quiescent Current of 10 A at OFF Mode and High PFM 20 19 18 17 16 1 15 ACSP LSDRV Light Load Efficiency 80% at 20 mA Load to Meet Energy Star and 2 14 RBDRV BCSP ErP Lot6 3 GND 13 VIN BCSN Full NMOS Solution 4 12 VSEL BATDRV 5 11 Current and Power Monitoring VINOK VBAT 67 89 10 3.5 mm x 3.5 mm QFN20 Package These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant (Top View) Typical Applications Ultrabook Notebook ORDERING INFORMATION Tablet PC Device Package Shipping NCP1871MNTXG QFN20 3000 / Tape & (PbFree) Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: June, 2016 Rev. 0 NCP1871/D ACSN PRHOTB PMO HSDRV SW SDA SCL CBOOT TS VCORENCP1871 RIN L X AC QLS RAC SYSTEM QAC QRB ADAPTOR QHS LOAD DF CBOOT COUT1 COUT2 CIN CAC RCELL VIN RBDRV ACSP ACSN HSDRV SW CBOOT LSDRV BCSP VDD VSEL RBC 10k BCSN BATDRV VINOK HOST QBAT NCP1871 SDA SCL VBAT RTS PRHOTB CBAT TS PMO BATTERY RPMO VCORE PACK GND CCORE +5V Figure 1. Typical Application Circuit www.onsemi.com 2 RUP