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UCC3956DW Datasheet

  • UCC3956DW

  • Battery Management

  • 456.31KB

  • 10頁

  • ETC

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UCC2956
UCC3956
Switch Mode Lithium-Ion Battery Charger Controller
FEATURES
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Precision 4.1V Reference (1%)
High Efficiency Battery Charger Solution
Average Current Mode Control from
Trickle to Over Charge
Resistor Programmable Charge Currents
Internal State Logic Provides Four
Charge States
Programmable Over Charge Time
Fully Differential Switch Mode Current
Sensing
CHG Pin Initiates Charging
PRELIMINARY
DESCRIPTION
The UCC3956 family of Switch Mode Lithium-Ion Battery Charger
Controllers accurately control lithium-ion battery charging with a
highly efficient average current control loop. This chip is designed to
work as a stand alone charger controller for a single cell or multiple
cell battery pack. This chip combines charge state logic and aver-
age current PWM control circuitry with a 14 bit counter to program
the over charge time. The charge state logic indicates current or
voltage control depending on the charge state. The chip includes
undervoltage lockout circuitry to insure sufficient supply voltage is
present before output switching starts. Additional circuit blocks in-
clude a differential current sense amplifier, a 1% voltage reference,
voltage and current error amplifiers, PWM latch, charge state de-
code bits, and a 500mA output driver.
BLOCK DIAGRAM
UDG-96197-1
1/98
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UCC3956DW 產(chǎn)品屬性

  • 25

  • 集成電路 (IC)

  • PMIC - 電池管理

  • -

  • 充電管理

  • 鋰離子（Li-Ion）

  • 6 V ~ 18 V

  • 0°C ~ 70°C

  • 表面貼裝

  • 20-SOIC（0.295"，7.50mm 寬）

  • 20-SOIC

  • 管件

  • 296-11560-5

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