Datasheet
bq24765
www.ti.com
SLUS999 –NOVEMBER 2009
ELECTRICAL CHARACTERISTICS (continued)
7.0 V ≤ V(DCINA) ≤ 24 V, 0°C < T
J
< +125°C, typical values are at T
A
= 25°C, with respect to AGND (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CHARGE UNDERCURRENT COMPARATOR (Cycle-by-Cycle Synchronous to Non-Synchronous)
Cycle-by-cycle Synchronous to Cycle-by-cycle, (CSOP-CSON) voltage, falling,
V
UCP
Non-Synchronous Transition LGATE turns-off and latches off until next cycle 5 10 15 mV
Threshold
LOGIC INPUT PIN CHARACTERISTICS (CE, SDA, SCL)
V
IN_LO
Input low threshold voltage 0.8 V
Pull-up CE with ≥ 2kΩ resistor, or connect directly to
V
IN_HI
Input high threshold voltage 2.1 V
VREF.
V
BIAS
Input bias current V = 0 to 7V 1 μA
OPEN-DRAIN LOGIC OUTPUT PIN CHARACTERISTICS (ACOK, ICOUT)
V
OUT_LO
Output low saturation voltage Sink Current = 5 mA 0.5 V
VDDSMB INPUT SUPPLY FOR SMBUS
V
VDDSMB_RANGE
VDDSMB input voltage range 2.7 5.5 V
V
VDDSMB_UVLO_
VDDSMB undervoltage lockout
V
VDDSMB
Rising 2.4 2.5 2.6 V
Threshold_Rising
threshold voltage, rising
V
VDDSMB_UVLO_
VDDSMB undervoltage lockout
V
VDDSMB
Falling 100 150 200 mV
Hyst_Rising
hysteresis voltage, falling
I
VDDSMB_Iq
VDDSMB quiescent current V
VDDSMB
= SCL = SDA = 3.3 V 20 30 μA
SMB TIMING SPECIFICATIONS
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
R
SCLK/SDATA rise time 1 µs
t
F
SCLK/SDATA fall time 300 ns
t
W(H)
SCLK pulse width high 4 50 µs
t
W(L)
SCLK Pulse Width Low 4.7 µs
t
SU(STA)
Setup time for START condition 4.7 µs
START condition hold time after which first
t
H(STA)
4 µs
clock pulse is generated
t
SU(DAT)
Data setup time 250 ns
t
H(DAT)
Data hold time 300 ns
t
SU(STOP)
Setup time for STOP condition 4 µs
Bus free time between START and STOP
t
(BUF)
4.7 µs
condition
F
S(CL)
Clock Frequency 10 100 kHz
HOST COMMUNICATION FAILURE
t
timeout
SMBus bus release timeout 22 25 35 ms
t
BOOT
Deglitch for watchdog reset signal 10 ms
t
WDI
Watchdog timeout period 140 170 200 s
OUTPUT BUFFER CHARACTERISTICS
V
(SDAL)
Output LO voltage at SDA, I
(SDA)
= 3 mA 0.4 V
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