(1 PC) BQ2018SN UNITRODE Power Supply Support Circuit, Fixed, 1 Channel, SOIC-8
Tax included.
THIS IS FOR (1 PC) OF BQ2018SN BY UNITRODE
Power Supply Support Circuit, Fixed, 1 Channel, SOIC-8
Mfr Package Description SOIC-8
Status Transferred
Analog IC - Other Type POWER SUPPLY SUPPORT CIRCUIT
Adjustable Threshold NO
JESD-30 Code R-PDSO-G8
Number of Channels 1
Number of Functions 1
Number of Terminals 8
Operating Temperature-Min -20.0 Cel
Operating Temperature-Max 70.0 Cel
Package Body Material PLASTIC/EPOXY
Package Code SOP
Package Shape RECTANGULAR
Package Style SMALL OUTLINE
Qualification Status Not Qualified
Supply Voltage-Nom (Vsup) 4.25 V
Supply Voltage-Min (Vsup) 2.8 V
Supply Voltage-Max (Vsup) 5.5 V
Surface Mount YES
Temperature Grade COMMERCIAL
Terminal Form GULL WING
Terminal Position DUAL
Features
➤ Multifunction charge/discharge
counter
➤ Resolves signals less than 12.5µV
➤ Internal offset calibration improves accuracy
➤ 1024 bits of NVRAM configured as
128 x 8
➤ Internal temperature sensor for
self-discharge estimation
➤ Single-wire serial interface
➤ Dual operating modes:
- Operating: <80µA
- Sleep: <10µA
➤ REG output for low-cost microregulation
➤ Internal timebase eliminates external components
➤ 8-pin TSSOP or SOIC allows battery pack integration
The bq2018 is a low-cost charge/discharge counter peripheral packaged in
an 8-pin TSSOP or SOIC. It works
with an intelligent host controller, providing state-of-charge information for
rechargeable batteries.
The bq2018 measures the voltage
drop across a low-value series sense
resistor between the negative terminal of the battery and the battery
pack ground contact. By using the accumulated counts in the charge,
discharge, and self-discharge registers, an intelligent host controller can
determine battery state-of-charge information. To improve accuracy, an
offset count register is available. The
system host controller is responsible
for the register maintenance by resetting the charge in/out and selfdischarge registers as needed.
The bq2018 also features 128 bytes
of NVRAM registers. The upper 13
bytes of NVRAM contain the capacity monitoring and status information. The RBI input operates from
an external power storage source
such as a capacitor or a series cell in
the battery pack, providing register
nonvolatility for periods when the
battery is shorted to ground or when
the battery charge state is not sufficient to operate the bq2018. During
this mode, the register backup current is less than 100nA.
Packaged in an 8-pin TSSOP or
SOIC, the bq2018 is small enough
to fit in the crevice between two Asize cells or within the width of a
prismatic cell.