Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits

BQ25504 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
BQ25504 Ultra Low-Power Boost Converter With Battery Management for Energy Harvester Applications Texas-Instruments
Texas Instruments Texas-Instruments
BQ25504 Datasheet PDF : 36 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
bq25504
SLUSAH0C – OCTOBER 2011 – REVISED JUNE 2015
www.ti.com
7.5 Electrical Characteristics
Over recommended temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply for
conditions of VIN_DC = 1.2V, VBAT = VSTOR = 3V. External components LBST = 22 µH, CHVR = 4.7 µF CSTOR= 4.7 µF.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
BOOST CONVERTER \ CHARGER STAGE
VIN(DC)
IIN(DC)
PIN
VIN(CS)
PIN(CS)
DC input voltage into VIN_DC
Peak Current flowing from VIN into VIN_DC input
Input power range for normal charging
Cold-start Voltage. Input voltage that will start charging of
VSTOR
Minimum cold-start input power to start normal charging
Cold-start completed
0.5V < VIN < 3 V; VSTOR = 4.2 V
VBAT > VIN_DC; VIN_DC = 0.5 V
VBAT < VBAT_UV; VSTOR = 0 V;
0°C < TA < 85°C
VBAT < VSTOR(CHGEN)
VIN_DC clamped to VIN_CS by cold start circuit
VBAT = 100 µF ceramic
130
200
0.01
330
15
3000 mV
300 mA
300 mW
450 mV
µW
VSTOR_CHGEN
Voltage on VSTOR when cold start operation ends and
normal charger operation begins
1.6
1.77
1.95
V
RBAT(on)
Resistance of switch between VBAT and VSTOR when
turned on.
VBAT = 4.2 V; VSTOR load = 50 mA
2
Ω
RDS(on)
Charger Low Side switch ON resistance
Charger rectifier High Side switch ON resistance
VBAT = 2.1 V
VBAT = 4.2 V
VBAT = 2.1 V
VBAT = 4.2 V
2
Ω
2
5
Ω
5
fSW_BST
Boost converter mode switching frequency
BATTERY MANAGEMENT
1 MHz
IVBAT
IVSTOR
Leakage on VBAT pin
VSTOR Quiescent current Charger Shutdown in UV
Condition
VSTOR Quiescent current Charger Shutdown in OV
Condition
VBAT = 2.1 V; VBAT_UV = 2.3 V, TJ = 25°C
VSTOR = 0 V
VBAT = 2.1 V; VBAT_UV = 2.3 V,
–40°C < TJ < 65°C, VSTOR = 0 V
VIN_DC = 0V;
VBAT < VBAT_UV = 2.4V;
VSTOR = 2.2V, No load on VBAT
VIN_DC = 0V,
VBAT > VBAT_OV, VSTOR = 4.25,
No load on VBAT
1
5 nA
80 nA
330
750 nA
570
1400 nA
VBAT_OV
Programmable voltage range for overvoltage threshold
(Battery voltage is rising)
VSTOR increasing
2.5
5.25
V
VBAT_OV_HYST
Battery voltage overvoltage hysteresis threshold (Battery
voltage is falling), internal threshold
VSTOR decreasing
18
35
89 mV
VBAT_UV
Programmable voltage range for under voltage threshold
(Battery voltage is falling)
VSTOR decreasing; VBAT_UV > VBias
2.2
VBAT_OV
V
VBAT_UV_HYST
Battery under voltage threshold hysteresis, internal
thershold
VSTOR increasing
40
80
125 mV
VBAT_OK
Programmable voltage range for threshold voltage for
high to low transition of digital signal indicating battery is
OK,
VSTOR decreasing
VBAT_UV
VBAT_OV
V
VBAT_OK_HYST
Programmable voltage range for threshold voltage for low
to high transition of digital signal indicating battery is OK,
VSTOR increasing
50
VBAT_OV-
VBAT_UV
mV
VBAT_ACCURACY
VBAT_OKH
Overall Accuracy for threshold values, UV, OV, VBAT_OK Selected resistors are 0.1% tolerance
VBAT OK (High) threshold voltage
Load = 10 µA
–5%
5%
VSTOR-
200mV
V
VBAT_OKL
TSD_PROTL
TSD_PROTH
VBAT OK (Low) threshold voltage
The temperature at which the boost converter is disabled
and the switch between VBAT and VSTOR is
disconnected to protect the battery
Load = 10 µA
OT_Prog = LO
OT_Prog = HI
100 mV
65
°C
120
OT_Prog
Voltage for OT_PROG High setting
Voltage for OT_PROG Low setting
2
V
0.3
V
BIAS and MPPT CONTROL STAGE
VOC_sample
Sampling period of VIN_DC open circuit voltage
16
s
VOC_Settling
Sampling period of VIN_DC open circuit voltage
256
ms
VIN_Reg
VIN_shutoff
Regulation of VIN_DC during charging
DC input voltage into VIN_DC when charger is turned off
0.5 V <VIN < 3 V; IIN (DC) = 10 mA
–10%
40
80
10%
130 mV
MPPT_Disable Threshold on VOC_SAMP to disable MPPT functionality
VSTOR-15
mV
V
VBIAS
Voltage node which is used as reference for the
programmable voltage thresholds
VIN_DC 0.5V; VSTOR 1.8 V
1.21
1.25
1.27
V
6
Submit Documentation Feedback
Product Folder Links: bq25504
Copyright © 2011–2015, Texas Instruments Incorporated
Direct download click here

 

Share Link : 
All Rights Reserved© datasheetq.com 2015 - 2020  ] [ Privacy Policy ] [ Request Datasheet  ] [ Contact Us ]