LB8118M データシートの表示（PDF） - SANYO -> Panasonic
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LB8118M Datasheet PDF : 11 Pages
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Continued from preceding page.
Pin No.
6
Symbol
CHG MON
12
EXTBASE
7
GND
8
OSC
10
VEXT
11
VEXTCHG
18
VASP
19
UPBASE
20
VZ
27
S/S
LB8118M
Equivalent circuit
Function
Constant-current feedback input
pin for the charging circuit. The
charging current is determined
by comparing this input voltage
and the internal reference
voltage (0.35 V typ.).
Connection pin for the resistor
that is used to set the voltage for
the external step-down circuit.
This prevents invalid current at
no power supply.
LB8118M GND pin for
small-signal block. (GND except
output power Tr)
Input pin for the free-running
oscillation circuit that is used to
operate the PWM step-down
circuit and step-up circuit. The
oscillating frequency is
determined by external
capacitors.
Reference
voltage
startup circuit
External
power
input
Forced
startup
Voltage feedback input pin for
the external power supply
step-down circuit. VCC for
playback is set by comparing
this pin voltage with the internal
reference voltage (1.28 V typ.).
Voltage feedback input pin for
the external power supply
step-down circuit. VCC for
charging is set by comparing this
pin voltage with the internal
reference voltage (1.28 V typ.).
Voltage feedback input pin for
the step-up circuit. The step-up
voltage is determined by
comparing this pin voltage with
the internal reference voltage
(1.28 V typ.).
Connection pin for the resistor
that is used to set the voltage of
the step-up circuit. This prevents
invalid current in standby mode.
Input pin for start-up circuit when
an external voltage input is
applied. The external voltage
input is applied through a
resistor inserted in series. The
voltage is basically determined
1.2V + 2VBE; this pin has a
current draining capacity up to
20 mA.
LB8118M start-up input. (Start
on a low-level input.)
Continued on next page.
No.5825-6/11
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