bq51050B
bq51051B
SLUSB42C –JULY 2012–REVISED FEBRUARY 2013
www.ti.com
Maximum Charge Current: 1C
0.5C
Charge Voltage: 4.35V (bq51051B)
Charge Voltage: 4.2V (bq51050B)
4.2V (bq51051B)
4.1V (bq51050B)
T1
(0°C)
T2
(10°C)
T3
(45°C)
T4
(60°C)
Figure 19. JEITA Compatible TS Profile
Input over-voltage
If, for some condition (e.g., a change in position of the equipment on the charging pad), the rectifier voltage
suddenly increases in potential, the voltage-control loop inside the bq5105x becomes active, and prevents the
output from going beyond VBAT-REG. The receiver then starts sending back error packets every 30ms until the
RECT voltage comes back to an acceptable level, and then maintains the error communication every 250ms.
If the input voltage increases in potential beyond VOVP, the IC switches off internal FET and tells the primary to
bring the voltage back to VRECT(REG). In additional a proprietary voltage protection circuit is activated by means of
Cclamp1 and Cclamp2 that protects the IC from voltages beyond the maximum rating of the IC (e.g., 20V).
End Power Transfer Packet (WPC Header 0x02)
The WPC allows for a special command to terminate power transfer from the TX termed End Power Transfer
(EPT) packet. The v1.1 specifies the below reasons and their responding data field value. The Condition column
corresponds to the case where the bq5101x device will send this command.
REASON
VALUE
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
CONDITION
Unknown
AD > 3.6V
Charge Complete
Internal Fault
Over Temperature
Over Voltage
Over Current
Battery Failure
Reconfigure
TS/CTRL = 1
TJ > 150°C or RILIM < 100Ω
TS < VHOT, TS > VCOLD, or TS/CTRL < 100mV
Not Sent
Not Sent
Not Sent
Not Sent
No Response
VRECT target does not converge
16
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