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Product Information
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- Voltage detector IC  
- Reset IC  
 
- 1-Cell Li+ Battery Charger IC
- 2-Cell Lithium Battery Charger IC
- Multi-Cell Li+ Battery Charger IC
- LA Battery Charger IC
- LiFePO4 Battery Charger IC
- Solar Panel-Powered Charger IC
- NIMH Battery Charger IC
- Li+ Titanate Battery Charger IC
 
- WLED Driver
 
- DC-DC Converter
 
- N-channel MOSFET
- P-channel MOSFET
 
- Amplifiers
 
CN3155
1A Lithium Titanate Battery Charger IC
Product Profile
 
General Description
The CN3155 is a complete constant-current /constantvoltage linear charger for single cell or dual-cell
lithium titanate rechargeable batteries. The device contains an on-chip power MOSFET and eliminates the need
for the external current sense resistor and blocking diode. Its low external component count makes CN3155
ideally suited for portable applications.
Thermal feedback regulates the charge current to limit the die temperature during high power operation or
high ambient temperature. The regulation voltage is internally fixed at 2.75V or 5.5V depending on CELL pin
voltage level, it can also be adjusted upwards with an external resistor.
The charge current can be programmed externally with a single resistor. When the input supply is removed,
the CN3155 automatically enters a low power sleep mode, dropping the battery drain current to less than 3uA. Other features include under-voltage lockout, automatic recharge and charging/termination indicator.
The CN3155 is available in thermally enhanced 8-pin SOP/PP package.
 
Applications
Electronic Toys Power Bank
Portable Devices Variety Of Chargers
 
Features
Charge Management for 1 or 2-cell LithiumTitanate Batteries
On-chip Power MOSFET
No external Blocking Diode or Current Sense Resistors Required
Constant Charge Voltage 2.75V or 5.5V, can be adjusted upwards by an external resistor
Precharge Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial
  Stage of Charge
Trickle Charge Current can be Selected
Can be used as a Voltage Source
Programmable Continuous Charge Current Up to 1A(SOP8/PP), 500mA(SOP8)
Constant-Current/Constant-Voltage/Constant-Temperature Operation to Maximize Charge Rate Without Risk
  of Overheating
Automatic Low-Power Sleep Mode When Input Supply is Removed
Status Indication for LEDs or uP Interface
C/10 Charge Termination
Automatic Recharge
Pb-free, rohs compliant, halogen free(SOP8/PP)
Pb-free, rohs compliant(SOP8)
 
Application Note
Quick Start of CN31XX Demo Board
 
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