S1F75510 Epson Electronics America, Inc., S1F75510 Datasheet - Page 11

• Manufacturer Part Number: S1F75510
• Description: Charge-pump Dc/dc Converter & Voltage Regulator
• Manufacturer: Epson Electronics America, Inc.

Rev. 1.1
Voltage stabilizing circuit
The 2 boosting circuit in the positive direction generates the voltages necessary to input into the voltage
stabilizing circuit. It makes 2 boosting in the positive direction of the potential difference occurring between the
V
Under the blank mode, since the boosting operation is being carried out with the flying capacitor C2 stopping its
operation, the current consumption can be suppressed accordingly.
The theoretical equation (output voltage value under the idealistic non-load state) for the V
follows:
Actually, when a load is connected to the V
equation indicated below.
The voltage stabilizing circuit stabilizes the voltage being output through the V
to output the positive supply voltage for the source driver through the V
The output voltage setting for the V
As for I
of the max. load current (Refer to “Mode changeover circuit ”).
The circuit configuration · connection diagram for the voltage stabilizing circuit is as follows:
2 boosting circuit in the positive direction
DD
V
V
OUT1
OUT1
– V
RV
IV
OUT2,
OUT1
V
SS
V
= (V
= (V
OUT1
positive direction
V
DD
SS
2 boosting circuit in the
OUT1
using the V
DD
DD
in order to obtain normal output voltage value through the V
: Load current
= (V
: Output impedance of the x2 boosting circuit in the positive direction
– V
– V
DD
–V
SS
SS
SS
)
)
)
SS
2
potential as the reference voltage to output through the V
2
2 – RV
Fig. 4 Configuration diagram of the voltage stabilizing circuit
OUT1
OUT2
3 boosting circuit in the positive direction
3 boosting circuit in the negative direction
Reference voltage circuit
Voltage stabilizing
IV
pin should be Typ. +5.0V (TBD).
[Internal structure of the S1F75510]
OUT1
OUT1
circuit
+
–
, the output voltage will drop to the value represented by the
V
V
OUT1
OUT2
OUT2
OUT2
CVOUT2
pin.
OUT1
pin, use the IC within the range
+
OUT1
pin by the series regulator
+
To the source driver
CVOUT1
pin.
S1F75510
OUT1
becomes as
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