Epson RX8130CE - Reference Characteristics of the Charge Current; Re-Chargeable Battery Voltage Current Features

15 Battery backup switchover function
RX8130CE Jump to Top / Bottom
ETM50E-07 Seiko Epson Corporation 39
15.3 Reference characteristics of the charge current
Graph show an electric current characteristic (all SW1, SW2B, SW2A, resistance characteristic of ON) that can charge a
second battery.
It is reference value in 25 C.
When V
DD
voltage is high, The charge current increase.
And when little voltage differences of V
DD
and V
BAT
, charge current is decreasing.
A vertical axis shows charge current Ichg and a horizontal axis shows voltage difference Vdef between V
DD
and V
BAT
.
VDD = 3.0 V VDD = 5.5 V
Figure 27 V
BAT
charge current characteristics V
DD
= 3.0 V, 5.5 V
15.4 Re-Chargeable battery Voltage Current features
Figure 28 Re-chargeable battery connection
Vdef (V)
Ichg (mA)
Vdef (V)
Ichg (mA)
V
DD
2nd
Battery
Power
Supply
V
OUT
V
BAT
SW2A
SW2B
SW1
RX8130CE
A