DS273 Просмотр технического описания (PDF) - Maxim Integrated
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DS273 Datasheet PDF : 20 Pages
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Cache-Memory Battery-Backup Management IC
CHARGER CIRCUIT ELECTRICAL CHARACTERISTICS (continued)
(VIN = +10.8V to +13.2V, TA = -20°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Enable Hysteresis (ENS, ENC)
Pulldown Resistance (ENS, ENC)
LED Outputs Low
(CHARGE, DONE, FAULT)
Fault LED Flash Rate
Preconditioning Charge
Threshold
Preconditioning Hysteresis
SYMBOL
VHYS-EN
RPD
VOL
IOL = 10mA
fFAULT
VMIN (Note 1)
VHYS
CONDITIONS
MIN TYP
35
70
100 200
4
2.55 2.60
50
100
Preconditioning Charge Current
IPRE
VBATT+ < VMIN
5.0 10.0
Precondition Timeout
Charge-Current Range
(RSET Resistance)
Charge-Current Accuracy
Overcurrent Clamp
Constant-Voltage Threshold
Range
MARGIN Pin Leakage
Constant-Voltage Charge
Accuracy
tPRE
ICHG
Charge current determined by RSET
(Note 7)
IERR-CHG
RSET resistor tolerance 0.1%,
RSNS = 0.050
IOVERCURRENT RSET = 0 or RSNS = 0
VCV
Charge voltage determined by MARGIN
pin voltage
ILEAKAGE
VERR-CV
27
30
0.5
5.0
-5
1.7
3.6
4.2
-2
-25.0
Charge Termination (CV) Current ITERMINATE In constant-voltage mode
4.0
5.0
Charge-Restart Threshold
VDELTA (Note 8)
Safety Timeout Range
(STMR Resistance)
tSAFETY
Safety Timeout Error
tERR-SAFETY RSTMR = 22,000
Battery Charger Switching Period tSW-CHG Full load (1.5A) (Note 9)
Charger Undervoltage Lockout VUVLO-CHG
High-Side MOSFET
On-Resistance
RDSON-CP
ICHG = 1A, VIN = 10.8V
(Note 10)
Low-Side MOSFET On-Resistance RDSON-CN ICHG = 1A, VIN = 10.8V (Note 10)
Reverse Leakage of Charge FET
(CHG1, CHG2)
IREVERSE VIN = 0V, VCV = 4.2V, ENC = 0V
Forward Leakage of Charge FET
(CHG1, CHG2)
SNS Leakage Current
Startup Time
IFORWARD VIN = 12V, VCV = 4.2V, ENC = 0V
ILKG-CHG No charge current, VIN = 12V
tSTART Using typical application components
94
95
1
22
-5
0.83 1.00
8
-2
1
MAX
140
300
1.0
UNITS
mV
k
V
Hz
2.70
V
15.0
33
1.5
1.6
+5
mV
% of
ICHG
min
A
k
%
2.5
A
4.6
V
+2
µA
+25.0 mV
6.0
96
10
220
+5
10
0.4
0.15
10
% of
ICHG
% of
VCV
hr
k
%
µs
V
µA
10
µA
+2
µA
ms
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