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What is NCP1855?

This electronic component, produced by the manufacturer "ON Semiconductor", performs the same function as "Fully Integrated Li-Ion Switching Battery Charger".


NCP1855 Datasheet PDF - ON Semiconductor

Part Number NCP1855
Description Fully Integrated Li-Ion Switching Battery Charger
Manufacturers ON Semiconductor 
Logo ON Semiconductor Logo 


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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

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NCP1855 equivalent
NCP1855
Table 4. ELECTRICAL CHARACTERISTICS
Min & Max Limits apply for TA between −40°C to +85°C and TJ up to +125°C for VIN between 3.9 V to 7 V (Unless otherwise noted).
Typical values are referenced to TA = + 25°C and VIN = 5 V (Unless otherwise noted).
Symbol
Parameter
Conditions
Min Typ Max Unit
INPUT VOLTAGE
VINDET
Valid input detection threshold
VBUSUV
USB under voltage detection
VIN rising
VIN falling
VIN falling
Hysteresis
3.8 3.85 3.9
V
3.55 3.6 3.65 V
4.3 4.4 4.5 V
50 100 150 mV
VBUSOV
USB over voltage detection
VIN rising
Hysteresis
5.55 5.65 5.75 V
25 75 125 mV
VINOV
Valid input high threshold
VIN rising
Hysteresis
15.5 15.75 16
V
125 375 600 mV
INPUT CURRENT LIMITING
IINLIM
Input current limit
VIN = 5 V
Maximum Current range
Default value
100 2000 mA
70 85 100 mA
Accuracy
from 500 mA to 2000 mA
I2C Programmable granularity
(From 500 mA to 2000 mA)
−15
100
0%
mA
INPUT SUPPLY CURRENT
IQ_SW
VBUS supply current
IOFF
CHARGER DETECTION
No load, Charger active state
Charger not active
15 mA
500 mA
VCHGDET
Charger detection threshold
voltage
REVERSE BLOCKING CURRENT
VIN – VSENSN, VIN rising
VIN – VSENSN, VIN falling
50 110 180 mV
20 30 50 mV
ILEAK
VBAT leakage current
Battery leakage, VBAT = 4.2 V, VIN = 0 V,
SDA = SCL = 0 V
5 mA
RRBFET Input RBFET On resistance (Q1)
Charger active state, Measured between
IN and CAP, VIN = 5 V
BATTERY AND SYSTEM VOLTAGE REGULATION
VCHG
Output voltage range
Programmable by I2C
Default value
− 45 75 mW
3.3 4.5 V
3.6 V
Voltage regulation accuracy
I2C Programmable granularity
Constant voltage mode, TA = 25°C
−0.5
−1
25
0.5 %
1%
mV
BATTERY VOLTAGE THRESHOLD
VSAFE
VPRE
Safe charge threshold voltage
Conditioning charge threshold
voltage
VBAT rising
VBAT rising
2.1 2.15 2.2
2.75 2.8 2.85
V
V
VFET
End of weak charge threshold
voltage
VBAT rising
Voltage range
Default value
3.1 3.6 V
3.4
Accuracy
I2C Programmable granularity
−2
100
2%
mV
VRECHG
Recharge threshold voltage
Relative to VCHG setting register
97 %
www.onsemi.com
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Part Details

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