DS2715 查看數據表（PDF） - Maxim Integrated
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DS2715 Datasheet PDF : 17 Pages
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PARAMETER
dT/dt Blanking Time
PRECHARGE Timeout
FAST-CHARGE Timer
Range
TOPOFF to FAST-
CHARGE Duration Ratio
SYMBOL
tBLANK
tPC-TO
tFC
CONDITIONS
DS2715
DS2715B
DS2715: NiMH Battery Pack Charge Controller
MIN TYP
MAX UNITS
3.85
4.3
4.75
Min
30
Min
0.5
6
Hours
1:2
1:4
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Voltages relative to VSS.
Does not include current through VCH, RT, and DIV pins.
Below this voltage no I/O pins are active.
Does not include tolerance of RT resistor.
VBIAS and resistor tolerances must be added to determine actual threshold.
Specified temperature thresholds are only valid if recommended thermistor types are used.
Specification is guaranteed by design.
DETAILED PIN DESCRIPTION
PIN
NAME
DESCRIPTION
1
CBIAS Bypass for Internal Voltage Regulator
2
VCH
Cell Stack Charge Control Output
3
VSS
Chip Supply Return and Local Ground Reference
4
LED1 Charging Indicator Output
5
DNC Do Not Connect
6
VSS
Chip Supply Return and Local Ground Reference
7
CTG Connect to Local Ground (VSS)
8
CTG Connect to Local Ground (VSS)
9
MODE
Mode Select. Connect to VSS for linear mode of operation or CBIAS for comparator
mode of operation.
10
DIV
Thermistor Divider. Stable output to form a resistor divider for measuring
temperature on THM
11
SNS+ Positive Current Sense. Connect to the charge source side of the sense resistor
12
SNS- Negative Current Sense. Connect to the cell stack side of the sense resistor
13
VDD
Chip Supply Input: +4.5V to +16.5V range
14
RT
Failsafe Timeout. Timeout is selected by an external resistor from RT to VSS
15
THM
Thermistor Input. Connect to a thermistor located in the cell pack and a divider
resistor from the Div pin
Battery Voltage Sense Input. Connect to a divider from the positive terminal of the
16
VBATT cell stack to measure the voltage of a single cell
4 of 17
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