BQ24105-Q1 datasheet(11/45 Pages) TI1

Part #	BQ24105-Q1

Description	Synchronous Switched-Mode, Li-Ion and Li-Polymer Charge-Management IC With Integrated Power FETs

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Manufacturer	TI1 [Texas Instruments]

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UDG-04037

VLOW

Charge Voltage

Charge Current

Regulation Voltage

Regulation Current

VSHORT

Voltage Regulation and

Charge Termination Phase

Precharge

Timer

Programmable

Safety Timer

Current Regulation Phase

Precharge

Phase

Precharge

and Termination

ISHORT

bq24100, bq24103, bq24103A, bq24104, bq24105

bq24108, bq24109, bq24113, bq24113A, bq24115

www.ti.com

SLUS606P – JUNE 2004 – REVISED NOVEMBER 2015

8 Detailed Description

8.1 Overview

The bqSWITCHER™ supports a precision Li-ion or Li-polymer charging system for single cell or two cell

applications. The device has a battery detect scheme that allows it to automatically detect the presence and

absence of a battery. When the battery is detected, charging begins in one of three phases (depending upon

battery voltage): precharge, constant current (fast-charge current regulation), and constant voltage (fast-charge

voltage regulation). The device will terminate charging when the termination current threshold has been reached

and will begin a recharge cycle when the battery voltage has dropped below the recharge threshold (VRCG).

Precharge, constant current, and termination current can be configured through the ISET1 and ISET2 pins,

allowing for flexibility in battery charging profile. During charging, the integrated fault monitors of the device, such

as battery short detection (VSHORT), thermal shutdown (internal TSHTDWN and TS pin), and safety timer expiration

(TTC pin), ensure battery safety.

bqSWITCHER™ has three status pins (STAT1, STAT2, and PG) to indicate the charging status and input

voltage (AC adapter) status. These pins can be used to drive LEDs or communicate with a host processor.

Figure 3. Typical Charging Profile

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Product Folder Links: bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A

bq24115

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BQ24105-Q1 Datasheet(PDF) 11 Page - Texas Instruments

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