MAX1894 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1894 Datasheet PDF : 16 Pages
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Advanced Li+ Battery-Pack Protectors
ABSOLUTE MAXIMUM RATINGS
SRC, IC2, IC3, VCC to BN.......................................-0.3V to +28V
IC1 to BN ..................................................................-0.3V to +6V
DSO, TKO, CGO to BN.............................-0.3V to (VSRC + 0.3V)
B4P to B3P ...............................................................-0.3V to +6V
B3P to B2P ...............................................................-0.3V to +6V
B2P to B1P ...............................................................-0.3V to +6V
B1P to BN .................................................................-0.3V to +6V
CTL, SHDN to PKN...................................................-0.3V to +6V
PKN to BN ...................................................................-2V to +2V
ESD Protection on All Pins ...............................................±2000V
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VSRC = VB4P + 0.1V, each battery cell voltage (VCELL) = 3.6V, VCTL = VSHDN = VPKN, TA = 0°C to +85°C, unless otherwise noted.
Typical values are at TA = +25°C.)
PARAMETER
SRC Input Current
Supply Current (Note 1)
Shutdown Supply Current
Top Cell Sampling Current
(Note 2)
SYMBOL
ISUP
ISHDN
CONDITIONS
VSRC - VB_P = 1V
No faults
Undervoltage without charge source
VCELL = 3.6V
MIN TYP MAX UNITS
20
40
µA
30
45
µA
0.8
2
µA
60
µA
Intermediate Cell Input Bias
Current (Note 3)
VCELL = 3.6V
500
pA
VCC Undervoltage Lockout
Threshold
Rising edge, hysteresis = 1% falling edge
4.5
V
Charge-Mode Detection
Threshold
VSRC - VB4P
25
100
mV
MAX1894X cell voltage rising
4.225 4.250 4.275
Overvoltage Threshold (Note 4)
VOV_TH
V
MAX1924X, MAX1924V cell voltage rising
4.325 4.350 4.375
Overvoltage Threshold
Hysteresis
VOV_HYT MAX1924X, MAX1924V cell voltage falling
200
mV
Undervoltage Threshold (Note 4)
PKN to BN Discharge Current
Fault Threshold
VUV_TH
VOD_TH
Cell voltage falling
2.260 2.300 2.340
V
130 145 160
mV
PKN to BN Charge Current
Fault Threshold
PKN to BN Discharge Current
Fault Threshold, Pack-Short
Condition
Discharge or Charge Current
Fault to DSO, CGO, TKO
Transition Delay Time
Discharge Current Fault to DSO
Transition Time Delay for Pack-
Short Condition
VOC_TH
VPS_TH
tI-DELAY
tP-DELAY
-120 -100 -80
mV
385 405 425
mV
2.5
3
3.5
ms
400 450 500
µs
2 _______________________________________________________________________________________
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