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BQ24750RHDTG4 Datasheet(PDF) 8 Page - Texas Instruments

Part # BQ24750RHDTG4
Description  AC Overpower Protection
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

BQ24750RHDTG4 Datasheet(HTML) 8 Page - Texas Instruments

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bq24750
SLUS735D – DECEMBER 2006 – REVISED MARCH 2009............................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
7 V
≤ VPVCC ≤ 24 V, 0°C < TJ < 125°C, typical values are at TA = 25°C, with respect to AGND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CHARGE OVERCURRENT COMPARATOR
145
VOC
Charge overcurrent falling threshold
As percentage of IREG_CHG
%
Minimum Current Limit (SRP-SRN)
50
mV
CHARGE UNDERCURRENT COMPARATOR (SYNCHRONOUS TO NON-SYNCHRONOUS TRANSITION)
Changing from synchronous to
VISYNSET_FALL
Charge undercurrent falling threshold
9.75
13
16.25
mV
non-sysnchronous
VISYNSET_HYS
Charge undercurrent rising hysteresis
8
mV
Charge undercurrent, falling-current
20
deglitch
VIREG_DPM < VISYNSET
µs
Charge undercurrent, rising-current
640
deglitch
INPUT OVERPOWER COMPARATOR (ACOP)
ACOC Gain for initial ACOC current
Begins 700 ms after ACDET
%
VACOC
limit limit (Percentage of programmed
Input current limited to this threshold for
150
VIREG_DPM
VIREG_DPM)
fault protection
Maximum ACOC input current limit
Internally limited ceiling
VACOC_CEILING
100
mV
(VACP–VACN)max
VACOC_MAX = (VACP–VACN)max
ACOP Latch Blankout Time with
Begins 700 ms after ACDET
ACOC active
(does not allow ACOP latch-off, and no
2
ms
(begins 700 ms after ACDET)
ACOP source current)
ACOP pin latch-off threshold voltage
VACOP
(See ACOP in Terminal Functions
1.95
2
2.05
V
table )
Current source on when in ACOC limit.
Gain for ACOP Source Current when
KACOP
Function of voltage across power FET
18
µA / V
in ACOC
IACOP_SOURCE = KACOP ×(VPVCC -VACP)
ACOP Sink Current when not in
ACOC
IACOP_SINK
Current sink on when not in ACOC
5
µA
ACOP Latch is reset by going below
ACDET or UVLO
INPUT OVERVOLTAGE COMPARATOR (ACOV)
AC Overvoltage rising threshold on
VACOV
ACDET
Measured on ACDET
3.007
3.1
3.193
V
(See ACDET in Terminal Functions)
AC Overvoltage rising deglitch
1.3
VACOV_HYS
ms
AC Overvoltage falling deglitch
1.3
THERMAL SHUTDOWN COMPARATOR
TSHUT
Thermal shutdown rising temperature
Temperature Increasing
155
°C
TSHUT_HYS
Thermal shutdown hysteresis, falling
20
°C
THERMISTER COMPARATOR (TS)
73.8
VLTF
Cold temperature rising threshold
As percentage to VVREF
72.5%
74.2%
%
VLTF_HYS
Rising hysteresis
As percentage to VVREF
0.5%
1%
1.5%
29.3
VTCO
Cut-off temperature rising threshold
As percentage to VVREF
28.7%
29.9%
%
34.4
VHTF
Hot temperature rising threshold
As percentage to VVREF
33.7%
35.1%
%
Deglitch time for temperature out of
VTS > VLTF, or VTS < VTCO, or
10
range detection
VTS < VHTF
ms
Deglitch time for temperature in valid
VTS > VLTF – VLTF_HYS or VTS > VTCO,
10
range detection
or VTS > VHTF
8
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