Texas Instruments bq27500 Bedienungsanleitung PDF herunterladen (Seite 25)

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Start

Init

(“BAT_GD”

disabled, OCV

taken, “BAT_GD

enabled.)

End

NoBattPresent

-OR- badbatt

(“BAT_GD”

disabled)

BattPresent

SLEEP

NORMAL

Yes

BatteryVolt

Sufficient

toFG?

Yes

Batt

removed?

Yes

Batt

detected?

Bq27500 POR

Batt

detected?

Yes

ACorUSB

Present?

Yes

IT Operations

(dsg, chg, rlx)

Batt

removed?

Yes

Icc >

standby

-OR-

> 30min

Yes

Forced

SLEEP

Mode?

Badbatt

detected?

Yes

Badbatt

detected?

Yes

bq27500

bq27501

System-Side Impedance Track™ Fuel Gauge

SLUS785 – SEPTEMBER 2007

Figure 5-1. BAT_GD Pin Operation, Based Upon Battery Presence and bq27500 Operating Mode

Submit Documentation Feedback FUNCTIONAL DESCRIPTION 25

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 38 39

1 INTRODUCTION 1
Contents 2
2 DEVICE INFORMATION 3
3 ELECTRICAL SPECIFICATIONS 4
3.5 HIGH FREQUENCY OSCILLATOR 5
3.6 LOW FREQUENCY OSCILLATOR 5
Figure 3-1. I 7
4 GENERAL DESCRIPTION 8
4.1 DATA COMMANDS 9
4.1.1 STANDARD DATA COMMANDS 9
SLUS785 – SEPTEMBER 2007 10
4.1.2 EXTENDED DATA COMMANDS 14
4.2 DATA FLASH INTERFACE 16
4.4 ACCESS MODES 17
4.6 DATA FLASH SUMMARY 18
(1) bq27501 only 19
5 FUNCTIONAL DESCRIPTION 20
5.3.3 BAT_LOW Pin 23
5.7 POWER MODES 27
5.7.1 NORMAL MODE 27
5.7.2 SLEEP MODE 27
5.7.3 BAT INSERT CHECK MODE 27
5.7.4 HIBERNATE MODE 28
5.8 POWER CONTROL 29
5.8.1 RESET FUNCTIONS 29
5.8.2 WAKE-UP COMPARATOR 30
5.8.3 FLASH UPDATES 30
5.9 AUTOCALIBRATION 30
7 COMMUNICATIONS 33
8 REFERENCE SCHEMATICS 34
PACKAGE OPTION ADDENDUM 35
IMPORTANT NOTICE 39

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