DS1650 Datasheet, PDF (19/26 Pages) National Semiconductor (TI) – Quad Differential Line Receivers

RT1650
Figure 12. Example of the Differential Bi-phase
Encoding
End Power Transfer Packet (WPC Header 0x02)
The End Power Transfer (EPT) packet is a special
command for the RT1650 to request the transmitter to
terminate power transfer. Table 2 specifies the reasons
coulomb and their responding data field value. The
condition column corresponds to the values sent by the
RT1650 for a given reason.
Table 2. End Power Transfer (EPT) packet
Reason Value
Condition
Unknown
Charge
Complete
0x00
0x01
VADD > 3.6V
From I²C, MODE0 = High
or VTS = High
Internal Fault 0x02 TJ > 150°C
Over
Temperature
0x03
VTS < VTS_HOT, VTS >
VTS_COLD or VTS = Low
Over Voltage 0x04 Not Sent
Over Current
Battery
Failure
Reconfigure
0x05
0x06
0x07
Not Sent
From I²C
Not Sent
No
Response
0x08
VRECT target doesn’t
converge
Operation Mode Control
The RT1650 provides 2 input pins for operating mode
control. Table 4 shows an example of operating mode
control for wireless power and external adapter power.
In default mode, both MODE0 and MODE1 are low, the
wireless power is enabled and the adapter power has a
higher priority. The wireless power is the normally
operation. Once the adapter power is detected, the
wireless power will be turned off and the ADEN will be
pulled low to turn on the external switch for connecting
the adapter power to system load. When the MODE1 is
pulled to high, the adapter power will be turned off by
the external switch and enters wireless mode to allow
wireless power operation only In adapter mode, the
wireless power is turned off always and ADEN is pulled
low to turn on external switch for adapter power In this
mode, it allows an external charger operating in USB
OTG mode to connect the OUT pin to power the USB
at ADD pin. If both MODE0 and MODE1 pins are pulled
to high, the wireless power and adapter power are
disabled.
Table 4. Operation Mode Control
Mode
MODE0
MODE1
Wireless
Power
Adapter
Power
OTG
Default 0
0
ON
ON(*) OFF
Wireless 0
1
ON
OFF OFF
Adapter 1
0
OFF
ON
Allowed
Disable 1
1
OFF
OFF OFF
(*)Note: If both adapter power and wireless power are
present, adapter power is given higher priority.
Copyright © 2015 Richtek Technology Corporation. All rights reserved.
DS1650-00 July 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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