BQ25606 Datasheet, PDF (20/43 Pages) Texas Instruments – Standalone 3.0-A, Single Cell Battery Charger With 40V Over Voltage Protection Controller

bq25606
SLUSCK6 – MAY 2017
www.ti.com
100
90
V_BATREG
4.1
80
4
70
60
3
50
40
2
30
20
1
10
0
T1
T2
T3
T5
±5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Battery Pack Temperature (°C)
0
T1
T2
T3
T5
±5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Battery Pack Temperature (°C)
Figure 12. JEITA Profile: Charging Current
Figure 13. JEITA Profile: Charging Voltage
Equation 1 through Equation 2 describe updates to the resistor bias network.
RT2 =
V_REGN
´ RTH_COLD
´
RTH_HOT
´
æ
çè
1_-
VT1
1ö
VT5 ^÷ø
RTH_HOT
´
æ
çè
V_REGN
VT5
-
ö
1_÷ø
-
RTH_COLD
´
æ
çè
V_REGN
VT1
-
ö
1_÷ø
(1)
RT1 =
æ
ç
è
æ
çè
V_REGN
VT1
ö
÷ø
-
ö
1_÷
ø
æ
çè
1
RT2
ö
÷ø
+
æ
ç
è
1
RTH_COLD
ö
÷
ø
(2)
Select 0°C to 60°C range for Li-ion or Li-polymer battery:
• RTH_COLD = 27.28 KΩ
• RTH_HOT = 3.02 KΩ
• RT1 = 5.23 KΩ
• RT2 = 30.9 KΩ
8.3.6.5 Boost Mode Thermistor Monitor during Battery Discharge Mode
For battery protection during boost mode, the device monitors the battery temperature to be within the VBCOLD
to VBHOTthresholds. When temperature is outside of the temperature thresholds, the boost mode is suspended.
V_REGN
Temperature Range to Boost
V_BCOLD
(±10°C)
Boost Disabled
V_BHOT
(65°C)
Boost Enabled
AGND
Boost Disabled
Figure 14. TS Pin Thermistor Sense Threshold in Boost Mode
20
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