BQ25504 Datasheet, PDF (6/24 Pages) Texas Instruments – Ultra Low Power Boost Converter with Battery Management for Energy Harvester Applications

bq25504
SLUSAH0 – OCTOBER 2011
www.ti.com
TYPICAL APPLICATION CIRCUITS
VIN_DC = 1.2 V, C_STOR= 4.7 µF, L_BST= 22 µH, C_HVR= 4.7 µF, C_REF= 10 nF, TSD_PROTL (65°C),
MPPT (V_OC) = 80% VBAT_OV = 3.1 V, VBAT_UV = 2.2 V, VBAT_OK = 2.4 V, VBAT_OK_HYST = 2.8 V,
R_OK1 = 4.42 MΩ, R_OK2 = 4.22 MΩ, R_OK3 = 1.43 MΩ, R_OV1 = 5.9 MΩ, R_OV2 = 4.02 MΩ,
R_UV1= 5.6 MΩ, R_UV2 = 4.42 MΩ, R_OC1= 15.62 MΩ, R_OC2 = 4.42 MΩ
Solar ⁺
Cell
-
L_BST
22µH
C_HVR
4.7µF
R_OC2
4.42 MΩ
R_{OC 1}
15.62MΩ
C_STOR
4.7µF
Battery(>100µF)
VSTOR
16 15 ^` 14
LBST VSTOR
1 VSS
VBAT
13
VSS
AVSS 12
2 VIN_DC
VBAT_OK 11
bq25504
3 VOC_SAMP
OK_PROG 10
C_REF
4 ^VREF_SAMP
OK_HYST ₉
0.01µF
OT_PROG VBAT_OV VRDIV VBAT _UV
5
6
7
8
R_OK1
4.42 MΩ
R_OK2
4.22 MΩ
R_OK3
1. 43 MΩ
VBAT_OK
R_OV2
4.02MΩ
R_OV1
5.90MΩ
R_UV2
4.42 MΩ
R_{UV 1}
5.60 MΩ
Figure 2. Typical Solar Application Circuit
6
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