RT1650 datasheet(19/26 Pages) RICHTEK

19 / 26 page

RT1650

is a registered trademark of Richtek Technology Corporation.

DS1650-00

July

2015

www.richtek.com

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

0x00

VADD > 3.6V

Charge

Complete

0x01

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

0x05

Not Sent

Battery

Failure

0x06

From I2C

Reconfigure

0x07

Not Sent

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

ON(*)

OFF

Wireless 0

OFF

Adapter 1

OFF

Allowed

Disable

OFF

(*)Note: If both adapter power and wireless power are

present, adapter power is given higher priority.

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