Battery Charger. NCP1854 Datasheet

NCP1854 Charger. Datasheet pdf. Equivalent

Part NCP1854
Description 2.5A Fully Integrated Li-Ion Switching Battery Charger
Feature NCP1854 2.5 A Fully Integrated Li-Ion Switching Battery Charger with Power Path Management and USB .
Manufacture ON Semiconductor
Datasheet
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NCP1854
NCP1854
2.5 A Fully Integrated Li-Ion
Switching Battery Charger
with Power Path
Management and USB
On-The-Go Support
The NCP1854 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 supervision. An optional battery FET can be placed between
the system and the battery in order to isolate and supply the system.
The NCP1854 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 NCP1854 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
http://onsemi.com
MARKING
DIAGRAM
25 BUMP
FLIP−CHIP
CASE 499BN
1854
AYWW
G
1854 = 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 27 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
September, 2014 − Rev. 4
1
Publication Order Number:
NCP1854/D



NCP1854
VBUS
D+
D−
ID
GND
NCP1854
CIN
1 mF
CCAP
4.7 mF
CCORE
2.2 mF
IN SW
NCP1854
CAP
CORE
CBOOT
SENSP
SENSN
WEAK
FET
BAT
USB PHY
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
COUT
22 mF SYSTEM
QBAT(*)
+
Figure 1. Typical Application Circuit
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
http://onsemi.com
2





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