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LTC4009

Features: · General Purpose Battery Charger Controller· Effi cient 550kHz Synchronous Buck PWM Topology· ±0.5% Output Float Voltage Accuracy· Programmable Charge Current: 4% Accuracy· Programmable AC Adapter Current Limit: 3% Accuracy· No Audible Noise with Ceramic Capacitors· Wide Input Voltage R...

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SeekIC No. : 004402408 Detail

LTC4009: Features: · General Purpose Battery Charger Controller· Effi cient 550kHz Synchronous Buck PWM Topology· ±0.5% Output Float Voltage Accuracy· Programmable Charge Current: 4% Accuracy· Programmable A...

LTC4009 Data Sheet

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Part Number:
LTC4009
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· General Purpose Battery Charger Controller
· Effi cient 550kHz Synchronous Buck PWM Topology
· ±0.5% Output Float Voltage Accuracy
· Programmable Charge Current: 4% Accuracy
· Programmable AC Adapter Current Limit: 3% Accuracy
· No Audible Noise with Ceramic Capacitors
· Wide Input Voltage Range: 6V to 28V
· Wide Output Voltage Range: 2V to 28V
· Indicator Outputs for AC Adapter Present, Charging, C/10 Current Detection and Input Current Limiting
· Analog Charge Current Monitor
· Micropower Shutdown
· Thermally Enhanced 20-Pin 4mm × 4mm × 0.75mm QFN Package


Application

· Notebook Computers
· Portable Instruments
· Battery Backup Systems


Pinout

Connection Diagram


Specifications

DCIN, CLP, CLN or SW to GND ................... 0.3V to 30V
CLP to CLN ............................................................±0.3V
CSP, CSN or BAT to GND ............................ 0.3V to 28V
CSP to CSN ............................................................±0.3V
BOOST to GND ........................................... 0.3V to 36V
BOOST to SW............................................... 0.3V to 7V
DCDIV, SHDN, FVS0, FVS1 or VFB to GND .... 0.3V to 7V
ACP, CHRG or ICL to GND ......................... 0.3V to 30V
Operating Temperature Range (Note 2)........ 0 to 85
Junction Temperature (Note 3) ............................. 125
Storage Temperature Range ................. 65 to 150


Description

The LTC4009 is a constant-current/constant-voltage battery charger controller. It uses a synchronous quasi-constant frequency PWM control architecture that will not generate audible noise with ceramic bulk capacitors. Charge current is set by the combination of external sense, input and programming resistors. With no built-in termination, the LTC4009 family charges a wide range of batteries under extrnal control.

The LTC4009 features a fully adjustable output voltage, while the LTC4009-1 and LTC4009-2 can be pin-programmed for lithium-ion/polymer battery packs of 1-, 2-, 3- or 4-series cells. The LTC4009-1 provides output voltage of 4.1V/cell, and the LTC4009-2 is a 4.2V/cell version.

The device includes AC adapter input current limiting which maximizes the charge rate for a fi xed input power level. An external sense resistor programs the input current limit, and the ICL status pin indicates when the battery charge current is being reduced as a result of AC adapter current limiting.

The CHRG status pin is active during all charging modes, including special indication for low charge current.




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