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BQ78412 Fiches technique(PDF) 10 Page - Texas Instruments

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No de pièce BQ78412
Description  Pb-Acid Battery State-of-Charge Indicator With Run-Time Display
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

BQ78412 Fiches technique(HTML) 10 Page - Texas Instruments

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bq78412
SLUSAA0 – OCTOBER 2010
www.ti.com
During charge, the LEDs represent the %SoC based on capacity in amp-hours and the number of LEDs defined
in DevConfig1[5:2]. When the display size in DevConfig1[5:2] is set to 10, each LED represents 10% of capacity.
When the display size in DevConfig1[5:2] is set to 5, each LED represents 20% of capacity.
Table 1. DsplyConf Parameter Description
BITS[15:8]
BITS[7:0]
BITS[15:8]
BITS[7:0]
PARAMETER
ALLOCATION DEFAULT
ALLOCATION DEFAULT
ALLOCATION
ALLOCATION
(MINUTES)
(MINUTES)
DsplyConf1
Time in LED1
Time in LED0
30
30
DsplyConf2
Time in LED3
Time in LED2
30
30
DsplyConf3
Time in LED5
Time in LED4
30
30
DsplyConf4
Time in LED7
Time in LED6
30
30
DsplyConf5
Time in LED9
Time in LED8
30
30
Table 2. Bar Graph Display Operation During Discharge – Five LED Example, Default DsplyConf Setting(1)
DIS
REPLAC
RTTE
CHARGE
FULL
GOOD
WARN
LED0
LED1
LED2
LED3
LED4
CHARGE
E
(min)
LED
LED
LED
LED
LED
LED
≥150
On
On
On
On
On
Off
On
Off
On
Off
Off
120-149
On
On
On
On
Off
Off
On
Off
On
Off
Off
90-119
On
On
On
Off
Off
Off
On
Off
On
Off
Off
60-89
On
On
Off
Off
Off
Off
On
Off
On
Off
Off
30-59
On
Off
Off
Off
Off
Off
On
Off
On
Off
Off
0-29
Off
Off
Off
Off
Off
Off
On
Off
On
Off
Off
(1)
Example assumes battery state of health is good.
Table 3. Bargraph Display Operation During Charge – 5 LED Example(1)
CHARGE
DIS CHARGE
FULL
GOOD
WARN
REPLACE
PERCENT SoC
LED0
LED1
LED2
LED3
LED4
LED
LED
LED
LED
LED
LED
0-19
Off
Off
Off
Off
Off
On
Off
Off
On
Off
Off
20-39
On
Off
Off
Off
Off
On
Off
Off
On
Off
Off
40-59
On
On
Off
Off
Off
On
Off
Off
On
Off
Off
60-79
On
On
On
Off
Off
On
Off
Off
On
Off
Off
80-99
On
On
On
On
Off
On
Off
Off
On
Off
Off
100
On
On
On
On
On
On
Off
Off
On
Off
Off
100 and Full
On
On
On
On
On
On
Off
On
On
Off
Off
Charge Detected
(1)
Example assumes battery state of health is good.
10
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Product Folder Link(s): bq78412


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