Datasheet

Maximum Charge Current: 1C
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)
0.5C
bq51050B
bq51051B
SLUSB42D –JULY 2012–REVISED JANUARY 2014 www.ti.com
Figure 22. 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 V
BAT-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 V
OVP
, the IC switches off internal FET and tells the primary to
bring the voltage back to V
RECT(REG)
. In additional a proprietary voltage protection circuit is activated by means of
C
clamp1
and C
clamp2
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.
Table 1.
REASON VALUE CONDITION
Unknown 0x00 AD > 3.6V
Charge Complete 0x01 TS/CTRL = 1
Internal Fault 0x02 T
J
> 150°C or R
ILIM
< 100Ω
Over Temperature 0x03 TS < V
HOT
, TS > V
COLD
, or TS/CTRL < 100mV
Over Voltage 0x04 Not Sent
Over Current 0x05 Not Sent
Battery failure 0x06 Battery is not coming out of pre-charge mode even after Pre-charge timeout.
Reconfigure 0x07 Not Sent
No Response 0x08 V
RECT
target does not converge
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