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NCP1855 Datasheet

Fully Integrated Li-Ion Switching Battery Charger

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NCP1855
9 V / 2.5 A, 12 V / 2 A, Fully
Integrated Li-Ion Switching
Battery Charger with Power
Path Management and USB
On-The-Go Support
The NCP1855 is a fully programmable single cell Lithium-ion
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 supervisibon. An optional battery FET can be placed
between the system and the battery in order to isolate and supply the
system. The NCP1855 junction temperature is 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 NCP1855 also provides USB OTG support by boosting the
battery voltage as well as providing overvoltage protected power
supply for USB transceiver.
Features
2.5 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
1000 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
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 Pb−Free and are RoHS Compliant
Typical Applications
Smart Phone
Handheld Devices
Tablets
PDAs
www.onsemi.com
MARKING
DIAGRAM
25 BUMP
FLIP−CHIP
CASE 499BN
1855
AYWW
G
1855 = Specific Device Code
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 25 of this data sheet.
© Semiconductor Components Industries, LLC, 2016
January, 2016 − Rev. 0
1
Publication Order Number:
NCP1855/D


  ON Semiconductor Electronic Components Datasheet  

NCP1855 Datasheet

Fully Integrated Li-Ion Switching Battery Charger

No Preview Available !

NCP1855
VBUS
D+
D−
ID
GND
CIN
1 mF
CCAP
4.7 mF
CCORE
2.2 mF
IN SW
NCP1855
CAP
CORE
CBOOT
SENSP
SENSN
WEAK
FET
BAT
USB PHY
* Optional Battery FET.
CTRS TRANS
0.1 mF
ILIM1
ILIM2
OTG
AGND
PGND
FLAG
SCL
SDA
SPM
FTRY
LX 2.2 mH RSNS 33 mW
CBOOT
10 nF
QBAT(*)
+
Figure 1. Typical Application Circuit
COUT
22 mF SYSTEM
PIN CONNECTIONS
1
A IN
234 5
IN
SPM
SDA
SCL
B CAP
CAP
OTG
ILIM2
FLAG
C SW
SW
AGND
ILIM1
FTRY
D PGND
PGND
SENSP
SENSN
FET
E CBOOT
TRANS
CORE
WEAK
BAT
(Top View)
Figure 2. Package Outline CSP
www.onsemi.com
2


Part Number NCP1855
Description Fully Integrated Li-Ion Switching Battery Charger
Maker ON Semiconductor
Total Page 26 Pages
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