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NCP1851 Datasheet

Fully Integrated Li-Ion Switching Battery Charger

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NCP1851, NCP1851A
Fully Integrated Li-Ion
Switching Battery Charger
with Power Path
Management and USB
On-The-Go Support
The NCP1851 is a fully programmable single cell Lithiumion
switching battery charger optimized for charging from a USB
compliant input supply and AC adaptor power source. The device
integrates a synchronous PWM controller, power MOSFETs, and the
entire charge cycle monitoring including safety features under
software supervision. An optional battery FET can be placed between
the system and the battery in order to isolate and supply the system.
The NCP1851 junction temperature and battery temperature are
monitored during charge cycle, and both current and voltage can be
modified accordingly through I2C setting. The charger activity and
status are reported through a dedicated pin to the system. The input pin
is protected against overvoltages.
The NCP1851 also provides USB OTG support by boosting the
battery voltage as well as providing overvoltage protected power
supply for USB transceiver.
Features
1.6 A Buck Converter with Integrated Pass Devices
Input Current Limiting to Comply to USB Standard
Automatic Charge Current for AC Adaptor Charging
High Accuracy Voltage and Current Regulation
Input Overvoltage Protection up to +28 V
Factory Mode
500 mA Boosted Supply for USB OTG Peripherals
Reverse Leakage Protection Prevents Battery Discharge
Protected USB Transceiver Supply Switch
Dynamic Power Path with Optional Battery FET
Battery Temperature Sensing for Safe Operation (JEITA)
Silicon Temperature Supervision for Optimized Charge Cycle
Safety Timers
Flag Output for Charge Status and Interrupts
I2C Control Bus up to 3.4 MHz
Small Footprint 2.2 x 2.55 mm CSP Package
These Devices are PbFree and are RoHS Compliant
Applications
Smart Phone
Handheld Devices
Tablets
PDAs
http://onsemi.com
MARKING
DIAGRAM
25 BUMP
FLIPCHIP
CASE 499BN
XXXX
AYWW
G
XXXX = Specific Device Code
A = Assembly Location
Y = Year
WW = Work Week
G or G = PbFree Package
*PbFree indicator, “G” or microdot “ G”,
may or may not be present.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 30 of this data sheet.
© Semiconductor Components Industries, LLC, 2013
March, 2013 Rev. 6
1
Publication Order Number:
NCP1851/D


  ON Semiconductor Electronic Components Datasheet  

NCP1851 Datasheet

Fully Integrated Li-Ion Switching Battery Charger

No Preview Available !

VBUS
D+
D
GND
NCP1851, NCP1851A
CIN
1 mF
CCAP
4.7 mF
CCORE
2.2 mF
USB PHY
CTRS
0.1 mF
IN SW
NCP1851
CAP
CORE
CBOOT
SENSP
SENSN
WEAK
FET
TRANS
BAT
NTC
ILIM1
ILIM2
OTG
AGND
PGND
FLAG
SCL
SDA
SPM
LX 2.2 mH
CBOOT
10 nF
RSNS 68 mW
COUT
10 mF
QBAT(*)
+
*Optional Battery FET.
Figure 1. Typical Application Circuit
SYSTEM
PIN CONNECTIONS
1
A IN
234 5
IN
SPM
SDA
SCL
B CAP
CAP
OTG
ILIM2
FLAG
C SW
SW
AGND
ILIM1
NTC
D PGND
PGND
SENSP
SENSN
FET
E CBOOT
TRANS
CORE
WEAK
BAT
(Top View)
Figure 2. Package Outline CSP
http://onsemi.com
2


Part Number NCP1851
Description Fully Integrated Li-Ion Switching Battery Charger
Maker ON Semiconductor
Total Page 30 Pages
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