Datasheet

Primary Cell
1
2
4
3
5 6 7 8
9
10
11
12
16 15 14 13
`
C
HVR
L
BST
VSTOR
VBAT_OK
bq25504
VSTOR
R
OV2
R
OK1
R
OK2
R
OK3
Battery(>100µF)
VSS
VIN_DC
AVSS
VOC_SAMP
VREF_SAMP
OT_PROG VBAT_OV VRDIV VBAT _UV
LBST VSTOR VBAT VSS
OK_HYST
OK_PROG
VBAT _OK
3.97 MΩ
976 kΩ
5.05 MΩ
4.48 MΩ
22 µH
4. 7 µF
R
UV2
4.42 MΩ
R
UV1
5.56 MΩ
R
OV1
5.56 MΩ
C
STOR
4.7 µF
(min)
C
FLTR
0.1µF
(1)
(2)
bq25504
SLUSAH0A –OCTOBER 2011–REVISED SEPTEMBER 2012 www.ti.com
VIN_DC = 1.2 V, C
STOR
= 4.7 µF, L
BST
= 22 µH, C
HVR
= 4.7 µF, TSD_PROTL (65°C),
MPPT (V
OC
) = Disabled VBAT_OV = 3.3 V, VBAT_UV = 2.2 V, VBAT_OK = 2.8 V, VBAT_OK_HYST = 3.1 V,
R
OK1
= 3.97 MΩ, R
OK2
= 5.05 MΩ, R
OK3
= 0.976 MΩ, R
OV1
= 5.56 MΩ,
R
OV2
= 4.48 MΩ, R
UV1
= 5.56 MΩ, R
UV2
= 4.42 MΩ
(1) Place close as possible to IC pin 15 (VSTOR) and pin 13 (VSS)
(2) See the Capacitor Selection section for guidance on sizing C
STOR
Figure 4. Typical MPPT Disabled Application Circuit
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