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LTC4067

Features: Programmable Input Current Limit:· Single Resistor at CLPROG Pin to Set and Monitor Input Current Battery Charger/Ideal Diode/Controller:· 13V Overvoltage Protection· Full Featured Battery Charger with 4.2V Float· Up to 1.25A Programmable Charge Current· Thermal Regulation Maximizes Char...

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SeekIC No. : 004402434 Detail

LTC4067: Features: Programmable Input Current Limit:· Single Resistor at CLPROG Pin to Set and Monitor Input Current Battery Charger/Ideal Diode/Controller:· 13V Overvoltage Protection· Full Featured Battery...

LTC4067 Data Sheet

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Part Number:
LTC4067
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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Product Details

Description



Features:

Programmable Input Current Limit:
· Single Resistor at CLPROG Pin to Set and Monitor Input Current Battery Charger/Ideal Diode/Controller:
· 13V Overvoltage Protection
· Full Featured Battery Charger with 4.2V Float
· Up to 1.25A Programmable Charge Current
· Thermal Regulation Maximizes Charge Current Without Risk of Overheating
· Internal 2 Hour Termination Timer from Onset of Voltage Mode Charging
· Automatic Load Switchover to Battery Power with Internal Ideal Diode and Drive Output for Optional
    External MOSFET
· NTC Thermistor Input
· Bad Battery Time-Out Detection
· 4mm × 3mm 12-Lead DFN Package


Application

· Automatic Battery Charging/Load Switchover
· Backup Battery Charger
· Uninterrupted Supplies


Pinout

Connection Diagram


Specifications

IN, OUT, BAT Voltage
    (t < 1ms, Duty Cycle < 1%) ...................... 0.3V to 7V
Steady State, IN, OUT, BAT Voltage ............. 0.3V to 6V
NTC, ILIM0, ILIM1, PROG, CLPROG, CHRG, GATE
    Voltages (Note 6) ...................................0.3V to VCC
OVI, OVP Voltages ..................................... 0.3V to 13V
Operating Temperature Range .................. 40to 85
Storage Temperature Range ................... 65 to 125
Max Junction Temperature (TJMAX) ......................... 125


Description

The LTC4067 is a USB power management and Li-Ion/ Polymer battery charger designed for portable battery powered applications. The part controls total current used by the USB peripheral for operation and battery charging. The total input current of LTC4067 may be left unregulated, or it may be limited to 20% or 100% of the programmed value up to 1.5A (typically 500mA). Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed Input current.

With the addition of an external P-channel MOSFET the LTC4067 can withstand voltages up to 13V.

The LTC4067 includes a complete constant current/constant voltage linear charger for single cell Li-Ion batteries. The fl oat voltage applied to the battery is held to a tight 0.4% tolerance, and charge current is programmed using an external resistor to ground. An end-of-charge status output,CHRG, indicates full charge. Also featured is an NTC thermistor input used to monitor battery temperature while charging.

The LTC4067 is available in a 12-lead low profi le 4mm ×3mm DFN package.




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