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LTC4002-4.2

Features: Wide Input Supply Range: 4.7V to 24V High Efficiency Current Mode PWM Controller with500kHz Switching Frequency ±1% Charge Voltage Accuracy End-of-Charge Current Detection Output 3 Hour Charge Termination Timer Constant Switching Frequency for Minimum Noise ±5% Charge Current Accuracy Lo...

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SeekIC No. : 004402403 Detail

LTC4002-4.2: Features: Wide Input Supply Range: 4.7V to 24V High Efficiency Current Mode PWM Controller with500kHz Switching Frequency ±1% Charge Voltage Accuracy End-of-Charge Current Detection Output 3 Hour Ch...

LTC4002-4.2 Data Sheet

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Part Number:
LTC4002-4.2
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/10/17

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Product Details

Description



Features:

 Wide Input Supply Range: 4.7V to 24V
High Efficiency Current Mode PWM Controller with500kHz Switching Frequency
±1% Charge Voltage Accuracy
End-of-Charge Current Detection Output
3 Hour Charge Termination Timer
Constant Switching Frequency for Minimum Noise
±5% Charge Current Accuracy
Low 10µA Reverse Battery Drain Current
Automatic Battery Recharge
Automatic Shutdown When Input Supply is Removed
Automatic Trickle Charging of Low Voltage Batteries
Battery Temperature Sensing and ChargeQualification
Stable with Ceramic Output Capacitor
8-Lead SO and 10-Lead DFN Packages


Application

 Portable Computers
 Charging Docks
 Handheld Instruments




Pinout

Connection Diagram


Specifications

Supply Voltage (VCC) .............................................. 24V
GATE .................................................. (VCC 8V) to VCC
BAT, SENSE .............................................. 0.3V to 14V
CHRG, COMP, NTC ..................................... 0.3V to 8V
Operating Temperature Range (Note 2) .. ....40°C to 85°C
Storage Temperature Range ..................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec) ........................ 300°C


Description

The LTC®4002-4.2 is a complete battery charger controllerfor single cell 4.2V lithium-ion batteries. With a 500kHzswitching frequency, the LTC4002-4.2 provides a small,simple and efficient solution to fast charge Li-Ion batteriesfrom a wide range of supply voltages. An external senseresistor sets the charge current with ±5% accuracy. Aninternal resistor divider and precision reference set thefinal float voltage to 4.2V with ±1% accuracy.

When the input supply is removed, the LTC4002-4.2automatically enters a low current sleep mode, droppingthe battery drain current to 10µA. An internal comparatordetects the near end-of-charge condition while an internaltimer sets the total charge time and terminates the chargecycle. After the charge cycle ends, if the battery voltage
drops below 4.05V, a new charge cycle will automaticallybegin.

The LTC4002-4.2 is available in the 8-lead SO and 10-leadDFN packages.




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