|
|
PDF NCP1850 Data sheet ( Hoja de datos )
| Número de pieza | NCP1850 | |
| Descripción | Fully Integrated Li-Ion Switching Battery Charger | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de NCP1850 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
NCP1850
Fully Integrated Li-Ion
Switching Battery Charger
with Power Path
Management and USB
On-The-Go Support
The NCP1850 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 NCP1850 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 NCP1850 also provides USB OTG support by boosting the
battery voltage as well as providing overvoltage protected power
supply for USB transceiver.
Features
• 1.5 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
• 250 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
• Silicon Temperature Supervision for Optimized Charge Cycle
• Safety Timers
• Flag Output for Charge Status and Interrupts
• INTB Output for 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
Applications
• Smart Phone
• Handheld Devices
• Tablets
• PDAs
http://onsemi.com
MARKING
DIAGRAM
WLCSP25
CASE 567FZ
1850
AYWW
G
1850
A
Y
WW
G
= Specific Device Code
= Assembly Location
= Year
= Work Week
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 29 of this data sheet.
© Semiconductor Components Industries, LLC, 2013
May, 2013 − Rev. 1
1
Publication Order Number:
NCP1850/D
1 page  
NCP1850
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 3.6 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
3.55
3.6 3.65
V
2.95
3.0 3.05
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
VINOV
Valid input high threshold
VIN rising
Hysteresis
7.1
7.2 7.3
V
200 300 400 mV
INPUT CURRENT LIMITING
IINLIM
Input current limit
VIN = 5 V
IINLIM set to
100 mA
70 85 100 mA
IINLIM set to
500 mA
425 460 500 mA
IINLIM set to
900 mA
800 850 900 mA
IINLIM set to
1500 mA
1.4 1.45 1.5 A
INPUT SUPPLY CURRENT
IQ_SW
VBUS supply current
IOFF
CHARGER DETECTION
No load, Charger active state
Charger not active, NTC disable
15 mA
500 mA
VCHGDET
Charger detection threshold
voltage
REVERVE BLOCKING CURRENT
VIN – VSENSN, VIN rising
VIN – VSENSN, VIN falling
50 200 mV
10 50
ILEAK
VBAT leakage current
Battery leakage, VBAT = 4.2 V VIN = 0 V,
SDA = SCL = 0 V
5 7 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 90 mW
3.3 4.5 V
3.6
Voltage regulation accuracy
Constant voltage mode, TA = 25°C
−0.5
−1
0.5 %
1
I2C Programmable granularity
25 mV
BATTERY VOLTAGE THRESHOLD
VSAFE
VPRE
Safe charge threshold voltage
Conditioning charge threshold
voltage
VBAT rising
VFET = 3.1 V and 3.2 V
VFET = 3.3 V, 3.4 V, 3.5 V and 3.6 V
2.1 2.15 2.2 V
2.95 3 3.05 V
3.15 3.2 3.25
9. Minimum transition time from states to states.
http://onsemi.com
5
5 Page 
NCP1850
CHARGE MODE OPERATION
Overview
The NCP1850 is a fully programmable single cell
Lithium−ion switching battery charger optimized for
charging from a USB compliant input supply. The device
integrates a synchronous PWM controller; power
MOSFETs, and monitoring the entire charge cycle 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 in case of
weak battery. The NCP1850 junction temperature and
battery temperature are monitored during charge cycle and
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 NCP1850 is fully programmable through I2C
interface (see Registers Map section for more details). All
registers can be programmed by the system controller at any
time during the charge process. The charge current (ICHG),
charge voltage (VCHG), and input current (IINLIM) are
controlled by a dynamic voltage and current scaling for
disturbance reduction. Is typically 10 ms for each step.
NCP1850 also provides USB OTG support by boosting
the battery voltage as well as an over voltage protected
power supply for USB transceiver.
Charge Profile
In case of application without QFET (see Figure 4), the
NCP1850 provides four main charging phases as described
below. Unexpected behavior or limitations that can modify
the charge sequence are described further (see Charging
Process section).
IBAT
ICHG
VBAT
VCHG
VRECHG
IPRE
IEOC
ISAFE
VPRE
VSAFE
Safe
Charge
Pre
Charge
Constant
Current
Constant
Voltage
End of
Charge
Figure 5. Typical Charging Profile of NCP1850
Safe Charge:
With a disconnected battery or completely empty battery,
the charge process is in safe charge state, the charge current
is set to ISAFE in order to charge up the system’s capacitors
or the battery. When the battery voltage reaches VSAFE
threshold, the battery enters in pre−conditioning.
Pre Conditioning (pre−charge):
In preconditioning (pre charge state), the DC−DC
convertor is enabled and an IPRE current is delivered to the
battery. This current is much lower than the full charge
current. The battery stays in preconditioning until the VBAT
voltage is lower than VPRE threshold.
Constant Current (full charge):
In the constant current phase (full charge state), the
DC−DC convertor is enabled and an ICHG current is
delivered to the load. As battery voltage could be sufficient,
the system may be awake and sink an amount of current. In
this case the charger output load is composed of the battery
and the system. Thus ICHG current delivered by the
NCP1850 is shared between the battery and the system:
ICHG = ISYS + IBAT.
http://onsemi.com
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet NCP1850.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| NCP1850 | Fully Integrated Li-Ion Switching Battery Charger | ON Semiconductor |
| NCP1851 | Fully Integrated Li-Ion Switching Battery Charger | ON Semiconductor |
| NCP1851A | Fully Integrated Li-Ion Switching Battery Charger | ON Semiconductor |
| NCP1852 | Fully Integrated Li-Ion Switching Battery Charger | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |