NCP1871 Datasheet, PDF (1/27 Pages) ON Semiconductor – Narrow Voltage DC Battery Charger

NCP1871
Narrow Voltage DC Battery
Charger
The NCP1871 is a NVDC switching battery charger designed for
2−3−4 battery cell applications such as ultra books or tablets. It is
optimized for use with the mobile computing chipsets, and is also
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
voltage. This limits the variation on the system supply voltage, and
improves the efficiency of the core converters. The device includes a
voltage droop monitor, charger adapter validation and blocking as well
as an intelligent battery connection control. The adapter current,
charge current and system current are closely monitored and an image
is provided to the host. The NCP1871 is fully programmable through
an I²C friendly SMBus Interface.
Features
• SMBus Host−controlled NVDC−1 2S−4S Battery Charge Controller
• Instant−on Works with No Battery or Deeply Discharged Battery
• Automatic Supplement Mode with BATFET Control
• Battery Removal Sensor
• Programmable Switching Frequency
• SMBUS Clock up to 400 kHz (I²C compatible)
• Programmable Charge Current, Charge Voltage, Input Current Limit
with Interrupt Management
♦ ±0.5% Charge Voltage Regulation up to 18.08 V
♦ ±3% Input/Charge Current Regulation up to 8.064 A
• Support Battery LEARN Function
• Support Shipping Mode and Hard System Reset
• Ultra−Low Quiescent Current of 10 mA at OFF Mode and High PFM
Light Load Efficiency 80% at 20 mA Load to Meet Energy Star and
ErP Lot6
• Full NMOS Solution
• Current and Power Monitoring
• 3.5 mm x 3.5 mm QFN−20 Package
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
• Ultrabook
• Notebook
• Tablet PC
www.onsemi.com
1
QFN20
MN SUFFIX
CASE 485CP
MARKING DIAGRAM
XXXXX
XXXXX
ALYWG
G
XXXXX = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONFIGURATION
ACSP
RBDRV
VIN
VSEL
VINOK
20 19 18 17 16
1
15
2
14
3
GND
13
4
12
5
11
6 7 8 9 10
LSDRV
BCSP
BCSN
BATDRV
VBAT
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1871MNTXG QFN20 3000 / Tape &
(Pb−Free)
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
June, 2016 − Rev. 0
Publication Order Number:
NCP1871/D