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DS2715Z Datasheet(PDF) 3 Page - Dallas Semiconductor

Part # DS2715Z
Description  NiMH Battery Pack Charge Controller
PDF  12 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS2715Z Datasheet(HTML) 3 Page - Dallas Semiconductor

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DS2715: NiMH Cell Pack Charge Controller
3 of 12
AC ELECTRICAL CHARACTERISTICS
(4.5V
£ VDD £ 16.5V, TA = 0°C to +70°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
UVLO Debounce Time
tUVLO
10
µs
Current Sense
Comparator Propagation
Delay
tCOMP
(Note 7)
250
ns
Discharge Detect
Propagation Delay
tDD
From detection of current
reversal
1
µs
Return To Normal
Function (Op-Amp or
Comparator Mode)
tRNF
Time from reset of
discharge latch
1
µs
RT Timing Accuracy
tRt
(Note 4)
-10
+10
%
Internal Clock Accuracy
tBASE
-10
+10
%
ELECTRICAL CHARACTERISTICS: CHARGING
(4.5V
£ VDD £ 16.5V, TA = 0°C to +70°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Fast Charge Comparator
Threshold
VFC
Fast charge
-127
-121
-115
mV
Fast Charge Comparator
Hysteresis
VHYS-FC
Fast charge
-31
-28
-25
mV
Top-off and Pre-Charge
Comparator Threshold
VTO
Top-off and pre-charge
-38
-33
-28
mV
Top-off and Pre-Charge
Comparator Hysteresis
VHYS-TO
Top-off and pre-charge
-10
-8
-6
mV
Discharge Latch Reset
Threshold
VDCHG-RST
-15
-10
-5
mV
Discharge Latch Set
Threshold
VDCHG-SET
Reverse current through
sense resistor
5
10
15
mV
Low Battery Detect
Threshold
VLB
From presence detect into
pre-charge
0.95
1.0
1.05
V
Cell Detect Threshold
VDET
1.50
1.55
1.60
V
No Cell Detect Threshold
VOPEN
1.60
1.65
1.70
V
Presence Detect
Threshold Hysteresis
VHYS-PD
90
100
110
mV
2.88
2.92
2.96
V
Minimum Charge Temp
VTHM-MIN
(Note 5, 6)
0
ºC
1.28
1.32
1.36
V
Maximum Charge Temp
VTHM-MAX
(Note 5, 6)
45
ºC
1.12
1.16
1.20
V
Over Temp
VTHM-STOP
(Note 5, 6)
50
ºC
dT/dt Detect
TTERM
0.425
0.5
0.575
ºC/min
dT/dt Blanking Time
tBLANK
3.85
4.3
4.75
Min
Fast Charge Timer
Range
tFC
0.5
6
Hours
Top-Off to Fast Charge
Duration Ratio
1:2



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