DC鈭?/div>
GND
bq24008PWP
Figure 17. Temperature Threshold
Figure 18. APG Sensing Circuit
Values of resistors R1 and R2 can be calculated using the following equation:
R2
V
(APG)
+
V
CC
(R1
)
R2)
where V
(APG)
is the voltage at the APG/THM pin.
Current Regulation
The bq2400x provides current regulation while the battery-pack voltage is less than the regulation voltage. The current
regulation loop effectively amplifies the error between a reference signal, Vilim, and the drop across the external sense
resistor, R
SNS
.
VCC
1
R(SNS)
DC+
C1
10
碌F
DC鈭?/div>
+
VCC
2
3
4
5
6
C2
0.1
碌F
7
8
9
10
N/C
IN
IN
VCC
ISNS
N/C
APG/THM
U1
N/C
OUT
OUT
VSENSE
AGND
STAT2
STAT1
20
19
18
17
16
15
14
13
12
11
TMR EN TMR SEL
VSEL
GND
CR
N/C
bq24008PWP
Figure 19. Current Sensing Circuit
16
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