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Product Information
Your Position £ºProduct
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- Voltage detector IC ¡¡
- Reset IC ¡¡
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- Li+ Battery Charger IC
- Coin 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
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- WLED Driver
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- DC-DC Converter
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- Amplifiers
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CN3300
PFM Step-up Battery Charger Controller IC
Product Profile
      Application Note
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General Description£º
The CN3300 is a step up battery charger controller IC which operates from an input voltage of 4V to 28V.The
CN3300 includes on-chip reference voltage, +5V voltage regulator, inductor current sensing, battery voltage
monitoring and N-channel MOSSFET driving blocks, etc, which makes the CN3300 easy to be used with few
external components.
The CN3300 enter charging mode on power up, the external N-channel MOSFET is turned on, when the inductor
current rises to the upper limit, the N-channel MOSFET is turned off, then inductor current begins to fall,
the energy stored in inductor is transferred to the battery. When inductor current falls to the lower limit,
the external N-channel MOSFET is turned on again, and a new cycle starts. Battery voltage is feedback to FB
pin via the external resistor divider, when the voltage at FB pin reaches 1.205V(Typical), the charging is
terminated, the external N-channel MOSFET remains off until the voltage at FB pin decreases to recharge
threshold,The maximum switching frequency of CN3300 is 1MHz.
CN3300 adopts 6-pin SOT23 package.
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Applications£º
Lithium ion battery charger Lead-Acid battery charger
LiFePO4 battery charger Standalone battery charger
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Features£º
Input Voltage Range£º4V to 28V
Inductor Current Sensing
Battery Voltage Monitoring
Up to 1MHz Switching Frequency
Automatic Recharge
Up to 25W Output Power
On-Chip Voltage Regulator: 5V£¬5mA
Operating Temperature Range£º£­40¡æ to 85¡æ
6-Pin SOT23 Package
Lead-free£¬rohs-Compliant£¬Halogen-free
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Application Note£º
Circuit Design Procedures for CN3300
Quick Start of CN3300 Demo Board
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