ชิป CN3300 สำหรับอุปกรณ์ควบคุมการชาร์จ

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.

Applications:
 Lithium ion battery charger
 LiFePO4 battery charger
 Lead-Acid battery charger
 Standalone battery charger

Features:
 Input Voltage Range：4V 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：－40℃ to 85℃
 6-Pin SOT23 Package
 Lead-free，rohs-Compliant，Halogen-free