BQ25504 Datasheet, PDF (8/24 Pages) Texas Instruments – Ultra Low Power Boost Converter with Battery Management for Energy Harvester Applications

bq25504
SLUSAH0 – OCTOBER 2011
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
Primary Cell
L_BST
22 µH
C_HVR
4. 7 µF
C_STOR
4.7 µF
Battery(>100 µF)
VSTOR
16 15 ^` 14
LBST VSTOR
1 VSS
VBAT
13
VSS
AVSS 12
VSTOR
2 VIN_DC
VBAT_OK 11
bq25504
3 VOC_SAMP
OK_PROG 10
4 ^VREF_SAMP
OK_HYST 9
OT_PROG VBAT_OV VRDIV VBAT _UV
5
6
7
8
R_OK1
3.97 MΩ
R_OK2
5.05 MΩ
R_OK3
976 kΩ
VBAT _OK
R_OV2
4.48 MΩ
R_OV1
5.56 MΩ
R_UV2
4.42 MΩ
R_UV1
5.56 MΩ
Figure 4. Typical MPPT Disabled Application Circuit
8
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