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LTC1732-4, LTC17328-8.4, LTC1732EM

Table of contents:
Info of LTC1732-4
Info of LTC17328-8.4
Info of LTC1732EM

LTC1732-4, LTC17328-8.4, LTC1732EM Selling Leads, Datasheet

MFG:LINEAR Package Cooled:10PIN D/C:new

LTC1732-4, LTC17328-8.4, LTC1732EM Picture

LTC1732-4, LTC17328-8.4, LTC1732EM Datasheet download

Five Points

Part Number: LTC1732-4

MFG: LINEAR

Package Cooled: 10PIN

D/C: new

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LTC1732-4 General Description

The LTC^®1732 is a complete constant-current/constantvoltage linear charger controller for lithium-ion (Li-Ion) batteries. Nickel-cadmium (NiCd) and nickel metalhydride (NiMH) batteries can also be charged with constant current using external termination. Charge current can be programmed with 7% (max) accuracy using external sense and program resistors. An internal resistor divider and precision reference set the final float voltage with 1% accuracy. The SEL pin allows users to charge either 4.1V or 4.2V cells.

When the input supply is removed, the LTC1732 automatically enters a low current sleep mode, dropping the battery drain current to 7A. An internal comparator detects the end-of-charge (C/10) condition while a programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until cell voltage exceeds 2.457V.

The LTC1732 begins a new charge cycle when a discharged battery is connected to the charger or when the input power is applied. In addition, if the battery remains connected to the charger and the cell voltage drops below 3.8V for the LTC1732-4 or below 4.05V for the LTC1732-4.2, a new charge cycle will automatically begin.

The LTC1732 is available in the 10-pin MSOP package.

LTC1732-4 Maximum Ratings

Input Supply Voltage (V_CC) ....................................... 13.2V
SENSE, DRV, BAT, SEL, TIMER, PROG,
CHRG, ACPR .............................................. 0.3V to 13.2V
Operating Temperature Range (Note 2) ...... 40° to 85
Storage Temperature Range ................. ....65 to 150
Lead Temperature (Soldering, 10 sec)...................... 300

LTC1732-4 Features

` Complete Linear Charger Controller for 1-Cell Lithium-Ion Batteries
` Preset Charge Voltage with 1% Accuracy
` Programmable Charge Current
` C/10 Charge Current Detection Output
` Programmable Charge Termination Timer
` Small, Thin 10-Pin MSOP Package
` Select Pin Charges 4.1V or 4.2V Cells (LTC1732-4)
` Input Supply (Wall Adapter) Detection Output
` 4.5V to 12V Input Voltage Range
` Automatic Sleep Mode When Input Supply is Removed (Only 7A Battery Drain)
` Automatic Trickle Charge of Low Voltage Cells
` Programmable for Constant-Current-Only Mode
` Battery Insertion Detect
` 4.05V Recharge Threshold for 4.2V Cells (LTC1732-4.2)
` 3.8V Recharge Threshold for 4.1V or 4.2V Cells (LTC1732-4)

LTC1732-4 Typical Application

· Cellular Phones
· Handheld Computers
· Charging Docks and Cradles

LTC1732-4 Connection Diagram

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