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Part Number: NCP1835B
Description: NCP1835B is an integrated linear charger specifically designed to charge 1−ce...
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NCP1835B
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DataSheet
General Description
NCP1835B General Description
NCP1835B is an integrated linear charger specifically designed to charge 1−cell Li−Ion batteries with a constant current, constant voltage (CCCV) profile.
Its low input voltage capability, adjustable charge current, ability to maintain regulation without a battery, and its onboard thermal foldback make it versatile enough to charge from a variety of wall adapters. The NCP1835B can charge from a standard wall adapter orfrom the USB port. It has been optimized to charge low capacity
batteries such as those found in wireless headsets and flash memory−based MP3 players. It's recommended charge current rate is 30−300 mA.
NCP1835B Maximum Ratings
|
Rating |
Symbol |
Value |
Units |
|
Supply Voltage |
VCC |
7.0 |
V |
|
Status Flag Output Pins
|
VFAULT, VCFLG |
7.0
|
V
|
|
Voltage Range for Other Pins |
Vio |
5.5 |
V |
|
Current Out from BAT Pin |
IO |
1.2 |
A |
|
Thermal Characteristics Thermal Resistance, Junction−to−Air (Note 3) Power Dissipation, TA = 25°C (Note 3) |
RJA PD |
68.5 1.09 |
°C/W W |
|
Moisture Sensitivity (Note 4) |
MSL |
Level 1 |
|
|
Operating Ambient Temperature |
TA |
−20 to 70 |
°C |
|
Storage Temperature |
Tstg |
−55 to 125 |
°C |
|
ESD
Human Body Model Machine Model |
HBM MM |
2000 200 |
V V |
NCP1835B Features
• Integrated Voltage and Current Regulation
• No External MOSFET, Sense Resistor or Blocking Diode Required
• Charge Current Thermal Foldback
• Integrated Pre−charge Current for Conditioning a Deeply Discharged Battery
• Integrated End−of−Charge (EOC) Detection
• 1% Voltage Regulation
• 4.2 V Regulated Output Voltage
• Regulation Maintained without a Battery Present
• Programmable Full Charge Current
• Open−Drain Charger Status and Fault Alert Flags
• 2.8 V Output for AC Present Indication and Powering Charging Subsystems
• Minimum Input Voltage of 2.4 V Allows Use of Current Limited Adapters
• Automatically Recharging if Battery Voltage Drops after Charging Cycle is Completed
• Low Profile 3x3 mm DFN Package
• Pb−Free Package is Available
• No External MOSFET, Sense Resistor or Blocking Diode Required
• Charge Current Thermal Foldback
• Integrated Pre−charge Current for Conditioning a Deeply Discharged Battery
• Integrated End−of−Charge (EOC) Detection
• 1% Voltage Regulation
• 4.2 V Regulated Output Voltage
• Regulation Maintained without a Battery Present
• Programmable Full Charge Current
• Open−Drain Charger Status and Fault Alert Flags
• 2.8 V Output for AC Present Indication and Powering Charging Subsystems
• Minimum Input Voltage of 2.4 V Allows Use of Current Limited Adapters
• Automatically Recharging if Battery Voltage Drops after Charging Cycle is Completed
• Low Profile 3x3 mm DFN Package
• Pb−Free Package is Available
NCP1835B Typical Application
• Wireless Headsets
• MP3 Players
• USB Appliances
• Battery Operated Devices
• MP3 Players
• USB Appliances
• Battery Operated Devices
NCP1835B Connection Diagram
NCP1835B
PDF/DataSheet Download
- Datasheet: NCP1835B
- File Size: 148760 KB
- Manufacturer: ON SEMICONDUCTOR
- Click here to Download
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