N681622YG Nuvoton Technology Corporation of America, N681622YG Datasheet - Page 62

• Manufacturer Part Number: N681622YG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of N681622YG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

The N681386/87 device can also operate from two or three external battery supplies. The external battery supply
architecture can be enabled by pulling the XBAT Pin HIGH. This will also power down the on-chip PWM controllers.
In this case the N681386/87 utilizes the DCPn and the DCNn pins to control the selection of externally supplied
VBATR, VBATH and VBATL for VBAT by means of a external circuit such as the one illustrated below.
The V
the DCNn pins output to the linefeed state can be uniquely programmed in the XBSDCN address (0x6A) register as
illustrated in the table below. The XBSDCP address (0x6B) register serves the same purpose for the DCPn pins.
The combination of DCNn, DCPn outputs and the external selection circuitry allows either VBATR, VBATH or VBATL
to be selected in any state.
When two external battery supplies are used (VBATH and VBATL) V
alone. Therefore, DCNn should be used to control the external battery switching.
Preliminary Datasheet Rev1.0
BAT
voltage selection is dependent on the linefeed state and the relationship is programmable. The mapping of
12.1.8.2.
EXTERNAL BATTERY SWITCHING
DC-to-DC
Control
DC-to-DC
Figure 23: Three Voltage External Battery switching
Control
Figure 24: Two Battery Supply Control Circuit
DCN
DCP
DCN
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Single Programmable Extended Codec/SLCC
BAT
selection can be controlled by the one pin
V
V
V
BAT
BATL
BATH
V
V
V
V
BATL
BATH
BATR
BAT
N681386/87
January 2010