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BQ28550-R1 数据表(PDF) 13 Page - Texas Instruments

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部件名 BQ28550-R1
功能描述  Single Cell Li-Ion Battery Gas Gauge
PDF  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

BQ28550-R1 数据表(HTML) 13 Page - Texas Instruments

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VDET1
VREL1
t
VDET2
BAT
V
SS
BAT
VSS
PACK–
BAT
V
SS
PACK –
V
DET3
Normal
Overcharge
Normal
Over-Discharge
Normal
t
DET2
t
Charger
Connected
Charger
Connected
Load
Connected
Shutdown
t
REL2
DET1
REL1
Not Recommended for New Designs
bq28550-R1
www.ti.com
SLUSAS4A – OCTOBER 2012 – REVISED SEPTEMBER 2014
Protection (continued)
7.5.3 Discharge Overcurrent Detector and Short-Circuit Detector
If the voltage across both protection MOSFETs (VM – VSS) becomes higher than the discharge overcurrent
detection voltage (VDET3 = 0.150 V typ) for a period of up to the discharge overcurrent detection delay time
(tDET3 = 12 ms typ), the bq28550-R1 device detects the discharge overcurrent state of the battery and the DOUT
pin transitions to a low level. This prohibits discharging the battery by turning off the external discharge control N-
channel MOSFET.
Additionally, if the voltage across both protection MOSFETs (VM – VSS) becomes higher than the short-circuit
voltage (VSHORT = VBAT – 0.9 V typ) for a period of up to the discharge short-circuit detection delay time
(tSHORT = 400 µs typ), the bq28550-R1 device detects a short-circuit of the battery and the DOUT pin transitions
to a low level. This prohibits discharging the battery by turning off the external discharge control N-channel
MOSFET.
Copyright © 2012–2014, Texas Instruments Incorporated
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Product Folder Links: bq28550-R1



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