DS2775/DS2776/DS2777/DS2778
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +4.0V to +9.2V, T
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DQ, PIO, SDA Output Logic-Low V
OL
I
OL
= 4mA 0.4 V
DQ, PIO Pullup Current I
PU
Sleep mode, V
PIN
= (V
DD
- 0.4V) 30 100 200 nA
DQ, PIO, SDA, SCL Pulldown
Current
I
PD
Active mode, V
PIN
= 0.4V 30 100 200 nA
DQ Input Capacitance C
DQ
50 pF
DQ Sleep Timeout t
SLEEP
DQ < V
IL
2 9 s
PIO, DQ Wake Debounce t
WDB
Sleep mode 100 ms
SHA-1 COMPUTATION TIMING (DS2776/DS2778 ONLY)
(V
DD
= +4.0V to +9.2V, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Computation Time t
COMP
30 ms
ELECTRICAL CHARACTERISTICS: PROTECTION CIRCUIT
(V
DD
= +4.0V to +9.2V, T
A
= 0°C to +50°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
OV
= 1110111b 4.438 4.473 4.508
Overvoltage Detect V
OV
V
OV
= 1100011b 4.242 4.277 4.312
V
Charge-Enable Voltage V
CE
Relative to V
OV
-100 mV
Undervoltage Detect V
UV
Programmable in Control register 0x60h,
UV[1:0] = 10
2.415 2.450 2.485 V
OC = 11b -60 -75 -90
Overcurrent Detect: Charge V
COC
OC = 00b -12.5 -25 -38
mV
OC = 11b 80 100 120
Overcurrent Detect: Discharge V
DOC
OC = 00b 25 38 50
mV
SC =1b 240 300 360
Short-Circuit Current Detect V
SC
SC = 0b 120 150 180
mV
Overvoltage Delay t
OVD
(Note 3) 600 1400 ms
Undervoltage Delay t
UVD
(Note 3) 600 1400 ms
Overcurrent Delay t
OCD
8 10 12 ms
Short-Circuit Delay t
SCD
80 120 160 μs
Charger-Detect Hysteresis V
CD
V
UV
condition 50 mV
Test Threshold V
TP
COC, DOC condition 0.4 1.0 1.2 V
DOC condition 20 40 80
Test Current I
TST
COC condition -45 -60 -95
μA
PLS Pulldown Current I
PPD
Sleep mode 200 400 630 μA
Recovery Current I
RC
V
UV
condition, max: V
PLS
= 15V, V
DD
= 1.4V;
min: V
PLS
= 4.2V, V
DD
= 2V
3.3 8 13 mA
(5 páginas)
(40 páginas)
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