BQ25504 Texas Instruments, BQ25504 Datasheet

The bq25504 is the first of a new family of intelligent integrated energy harvesting Nano-Power management solutions that are well suited for meeting the special needs of ultra low power applications

BQ25504
Manufacturer Part Number	BQ25504
Description	The bq25504 is the first of a new family of intelligent integrated energy harvesting Nano-Power management solutions that are well suited for meeting the special needs of ultra low power applications
Manufacturer	Texas Instruments
BQ25504 datasheets	1. BQ25504.pdf (24 pages)

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Specifications of BQ25504
Pin/package	16QFN	Vin(min)(v)	0.13
Vin(max)(v)	3	Optional Functions	Energy Harvester
Operating Temperature Range(c)	-40 to 85

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Ultra Low Power Boost Converter with Battery Management for Energy Harvester

FEATURES

•

Ultra Low Power With High Efficiency DC/DC

Boost Converter/Charger

– Continuous Energy Harvesting From Low

Input Sources: V

≥ 80 mV(Typical)

– Ultra Low Quiescent Current: I

(Typical)

– Cold-Start Voltage: V

≥ 330 mV (Typical)

•

Programmable Dynamic Maximum Power Point

Tracking (MPPT)

– Integrated Dynamic Maximum Power Point

Tracking for Optimal Energy Extraction

From a Variety of Energy Generation

Sources

– Input Voltage Regulation Prevents

Collapsing Input Source

•

Energy Storage

– Energy can be Stored to Re-Chargeable

Li-ion Batteries, Thin-film Batteries,

Super-Capacitors, or Conventional

Capacitors

•

Battery Charging and Protection

– User Programmable Undervoltage /

Overvoltage Levels

– On-Chip Temperature Sensor with

Programmable Overtemperature Shutoff

DESCRIPTION

The bq25504 is the first of a new family of intelligent integrated energy harvesting Nano-Power management

solutions that are well suited for meeting the special needs of ultra low power applications. The product is

specifically designed to efficiently acquire and manage the microwatts (µW) to miliwatts (mW) of power

generated from a variety of DC sources like photovoltaic (solar) or thermal electric generators. The bq25504 is

the first device of its kind to implement a highly efficient boost converter/charger targeted toward products and

systems, such as wireless sensor networks (WSN) which have stringent power and operational demands. The

design of the bq25504 starts with a DCDC boost converter/charger that requires only microwatts of power to

begin operating.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Applications

Check for Samples:

bq25504

•

Battery Status Output

– Battery Good Output Pin

– Programmable Threshold and Hysteresis

– Warn Attached Microcontrollers of Pending

< 330 nA

Loss of Power

– Can be Used to Enable/Disable System

Loads

APPLICATIONS

•

Energy Harvesting

•

Solar Charger

•

Thermal Electric Generator (TEG) Harvesting

•

Wireless Sensor Networks (WSN)

•

Industrial Monitoring

•

Environmental Monitoring

•

Bridge / Structural Health Monitoring (SHM)

•

Smart Building Controls

•

Portable and Wearable Health Devices

•

Entertainment System Remote Controls

HVR

Solar

Cell

bq25504

SLUSAH0 – OCTOBER 2011

BST

STOR

Battery

SYSTEM

LOAD

VSTOR

LBST

VSTOR

VBAT

VSS

AVSS

VBAT_OK

VIN_DC

VBAT_OK

bq25504

OC 2

OK1

VOC_SAMP

OK_PROG

REF

OK2

OC 1

OK_HYST

VREF_SAMP

OT_PROG VBAT_OV VRDIV VBAT _UV

OK3

OV2

UV 2

OV1

UV 1

Download datasheet (2Mb)

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BQ25504 Summary of contents
Page 1 ... The product is specifically designed to efficiently acquire and manage the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC sources like photovoltaic (solar) or thermal electric generators. The bq25504 is the first device of its kind to implement a highly efficient boost converter/charger targeted toward products and systems, such as wireless sensor networks (WSN) which have stringent power and operational demands ... Page 2 ... This should trigger the shedding of load currents to prevent the system from entering an undervoltage condition. The OV, UV and battery good thresholds are programmed independently. All the capabilities of bq25504 are packed into a small foot-print 16-lead QFN package. PART NO. PACKAGE ... Page 3 ... VBAT < VBAT_UV; VSTOR = 0 V; 0°C < T < 85°C A VBAT < VBAT_UV; VSTOR = 0 V; Input source impedance 0 Ω VBAT = 4.2 V; VSTOR load = 50 mA VBAT = 2.1 V VBAT = 4.2 V VBAT = 2.1 V VBAT = 4.2 V Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 bq25504 UNITS RGT (16 PINS) 48.5 63.9 22 °C/W 1.8 22 6.5 Calculator. MIN NOM MAX 0. ... Page 4 ... Selected resistors are 0.1% tolerance Load = 10 µA Load = 10 µA OT_Prog = LO OT_Prog = HI 0.5 V <V < (DC VIN_DC ≥ 0.5V; VSTOR ≥ 1.8 V Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :bq25504 www.ti.com = 4.7 µ 4.7 µF. HVR STOR MIN TYP MAX UNIT ... Page 5 ... Figure 1. bq25504 3mm x 3mm QFN-16 Package PIN I/O TYPE NO. NAME 1 VSS Input General ground connection for the device 2 VIN_DC Input DC voltage input from energy harvesters 3 VOC_SAMP Input Sampling pin for MPPT network. To disable MPPT, connect to VSTOR Switched node for holding the reference set by resistors on VOC_SAMP for MPPT. When MPPT is ... Page 6 ... VOC_SAMP OK_PROG C REF OK_HYST 4 VREF_SAMP OT_PROG VBAT_OV VRDIV VBAT _UV 0.01µ OV2 4.02MΩ R OV1 5.90MΩ Product Folder Link(s) :bq25504 www.ti.com = 4.02 MΩ, (>100µF) 13 VSS 12 AVSS VBAT_OK 11 R OK1 4.42 MΩ OK2 4.22 MΩ OK3 8 1.43MΩ ... Page 7 ... C 10 MΩ REF 4 VREF _ SAMP OT_PROG VBAT_OV VRDIV VBAT _UV 0.01µ VSTOR R OV2 5.62MΩ R OV1 4.42MΩ Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 = 5.62 MΩ, OV2 Battery (>100µF) 13 VSS 12 AVSS VBAT_OK 11 VBAT_OK R OK1 3.32 MΩ 10 OK_PROG R OK2 6.12 MΩ ... Page 8 ... LBST VSTOR VBAT 1 VSS 2 VIN_DC bq25504 VSTOR 3 VOC_SAMP 4 VREF_SAMP OT_PROG VBAT_OV VRDIV VBAT _UV OV2 4.48 MΩ R OV1 5.56 MΩ Product Folder Link(s) :bq25504 www.ti.com (>100 µF) 13 VSS 12 AVSS VBAT_OK 11 VBAT_OK R OK1 3.97 MΩ 10 OK_PROG R OK2 5.05 MΩ 9 OK_HYST R OK3 8 976 kΩ ... Page 9 ... LBST VSTOR VBAT Enable Enable BAT_SAVE Battery Threshold Control Vref OT Temperature Sensing Element Vref VRDIV VBAT_UV Figure 5. High-level Functional Diagram Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 VSS Boost Charge Controller AVSS VBAT_OK OK_PROG OK OK_HYST Vref Submit Documentation Feedback 9 ... Page 10 ... Figure 9. Efficiency vs Input Current 0. VSTOR = 3V 30 VSTOR = 1.8V VSTOR = 5. 100 0.01 G005 Figure 11. Efficiency vs Input Current Product Folder Link(s) :bq25504 www.ti.com VSTOR = 3.3 V VSTOR = 1.8 V VSTOR = 5.5 V Input Voltage (V) G002 VSTOR = 3V VSTOR = 1.8V VSTOR = 5.5V 0 100 Input Current (mA) G004 VSTOR = 3V VSTOR = 1.8V VSTOR = 5.5V 0.1 1 ... Page 11 ... G009 Figure 15. Settling Period vs Temperature VIN = 1 V, RIN = 20 , VBAT = ramping power supply Figure 17. Example of VBAT_OK Operation, Ramping Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 VSTOR = 1.8V VSTOR = 3V VSTOR = 4V −20 0 ... Page 12 ... VIN = 1 V, RIN = 20 , VBAT = 3.1 V, RBAT = 100 Figure 19. Example of Output Ripple Voltage During W VIN = 1 V, RIN = 20 , VBAT = 3 V, RBAT = 100 m W Figure 21. Example of Sampling Time for MPPT Operation Product Folder Link(s) :bq25504 www.ti.com W Operation Setting W Copyright © 2011, Texas Instruments Incorporated ... Page 13 ... VBAT, the PMOS switch is momentary closed and any available charge from the battery can be dumped onto VSTOR. If the resulting voltage is greater than about 1.8 V, then the bq25504’s biasing and oscillator circuits can be turned on, and start up of the boost converter will be initiated. However, if there is insufficient energy available in a connected battery, then the PMOS circuit is opened after ~20 ms, and the cold-start sequence is initiated via power provided by power at the VIN_DC input pin ... Page 14 ... ESR by-pass capacitor to prevent a droop in voltage. Battery Management In this section the battery management functionality of the bq25504 integrated circuit (IC) is presented. The IC has internal circuitry to manage the voltage across the storage element and to optimize the charging of the storage element. For successfully extracting energy from the source, three different threshold voltages must be programmed using external resistors, namely the under voltage (UV) threshold, battery good threshold (VBAT_OK) and over voltage (OV) threshold ... Page 15 ... MΩ. The overvoltage threshold when battery OV1 OV2 CAUTION ö ÷ ø OK1 Equation 5 ö OK2 O K3 ÷ ø Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 (2) Equation 3: (3) (4) (5) Submit Documentation Feedback 15 ... Page 16 ... VBAT and VSTOR will open and protect the battery even if the device is in thermal shutdown. INDUCTOR SELECTION For the bq25504 to operate properly, an inductor of appropriate value must be connected between Pin # 16 (LBST) and Pin #2 (VIN_DC) for the boost converter. For the boost converter / charger, the inductor must have an inductance = 22 µH and have a peak current capability of ≥ ... Page 17 ... For more details on how to use the thermal parameters in the Thermal Table, check the Thermal Characteristics Application Note (SZZA017) and the IC Package Thermal Metrics Application Note (SPRA953). Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 Submit Documentation Feedback 17 ... Page 18 ... Orderable Device (1) Package Type Package Status BQ25504RGTR ACTIVE QFN BQ25504RGTT ACTIVE QFN (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. ... Page 19 ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ25504RGTR QFN RGT BQ25504RGTT QFN RGT PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 16 3000 330.0 12.4 3.3 16 250 180.0 12.4 3.3 Pack Materials-Page 1 14-Oct-2011 Pin1 ... Page 20 ... Device Package Type BQ25504RGTR QFN BQ25504RGTT QFN PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) RGT 16 3000 RGT 16 250 Pack Materials-Page 2 14-Oct-2011 Width (mm) Height (mm) 346.0 346.0 29.0 210.0 185.0 35.0 ... Page 21 ... Page 22 ... Page 23 ... Page 24 ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...

BQ25504 Summary of contents

Page 1
... The product is specifically designed to efficiently acquire and manage the microwatts (µW) to miliwatts (mW) of power generated from a variety of DC sources like photovoltaic (solar) or thermal electric generators. The bq25504 is the first device of its kind to implement a highly efficient boost converter/charger targeted toward products and systems, such as wireless sensor networks (WSN) which have stringent power and operational demands ...
Page 2
... This should trigger the shedding of load currents to prevent the system from entering an undervoltage condition. The OV, UV and battery good thresholds are programmed independently. All the capabilities of bq25504 are packed into a small foot-print 16-lead QFN package. PART NO. PACKAGE ...
Page 3
... VBAT < VBAT_UV; VSTOR = 0 V; 0°C < T < 85°C A VBAT < VBAT_UV; VSTOR = 0 V; Input source impedance 0 Ω VBAT = 4.2 V; VSTOR load = 50 mA VBAT = 2.1 V VBAT = 4.2 V VBAT = 2.1 V VBAT = 4.2 V Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 bq25504 UNITS RGT (16 PINS) 48.5 63.9 22 °C/W 1.8 22 6.5 Calculator. MIN NOM MAX 0. ...
Page 4
... Selected resistors are 0.1% tolerance Load = 10 µA Load = 10 µA OT_Prog = LO OT_Prog = HI 0.5 V <V < (DC VIN_DC ≥ 0.5V; VSTOR ≥ 1.8 V Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :bq25504 www.ti.com = 4.7 µ 4.7 µF. HVR STOR MIN TYP MAX UNIT ...
Page 5
... Figure 1. bq25504 3mm x 3mm QFN-16 Package PIN I/O TYPE NO. NAME 1 VSS Input General ground connection for the device 2 VIN_DC Input DC voltage input from energy harvesters 3 VOC_SAMP Input Sampling pin for MPPT network. To disable MPPT, connect to VSTOR Switched node for holding the reference set by resistors on VOC_SAMP for MPPT. When MPPT is ...
Page 6
... VOC_SAMP OK_PROG C REF OK_HYST 4 VREF_SAMP OT_PROG VBAT_OV VRDIV VBAT _UV 0.01µ OV2 4.02MΩ R OV1 5.90MΩ Product Folder Link(s) :bq25504 www.ti.com = 4.02 MΩ, (>100µF) 13 VSS 12 AVSS VBAT_OK 11 R OK1 4.42 MΩ OK2 4.22 MΩ OK3 8 1.43MΩ ...
Page 7
... C 10 MΩ REF 4 VREF _ SAMP OT_PROG VBAT_OV VRDIV VBAT _UV 0.01µ VSTOR R OV2 5.62MΩ R OV1 4.42MΩ Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 = 5.62 MΩ, OV2 Battery (>100µF) 13 VSS 12 AVSS VBAT_OK 11 VBAT_OK R OK1 3.32 MΩ 10 OK_PROG R OK2 6.12 MΩ ...
Page 8
... LBST VSTOR VBAT 1 VSS 2 VIN_DC bq25504 VSTOR 3 VOC_SAMP 4 VREF_SAMP OT_PROG VBAT_OV VRDIV VBAT _UV OV2 4.48 MΩ R OV1 5.56 MΩ Product Folder Link(s) :bq25504 www.ti.com (>100 µF) 13 VSS 12 AVSS VBAT_OK 11 VBAT_OK R OK1 3.97 MΩ 10 OK_PROG R OK2 5.05 MΩ 9 OK_HYST R OK3 8 976 kΩ ...
Page 9
... LBST VSTOR VBAT Enable Enable BAT_SAVE Battery Threshold Control Vref OT Temperature Sensing Element Vref VRDIV VBAT_UV Figure 5. High-level Functional Diagram Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 VSS Boost Charge Controller AVSS VBAT_OK OK_PROG OK OK_HYST Vref Submit Documentation Feedback 9 ...
Page 10
... Figure 9. Efficiency vs Input Current 0. VSTOR = 3V 30 VSTOR = 1.8V VSTOR = 5. 100 0.01 G005 Figure 11. Efficiency vs Input Current Product Folder Link(s) :bq25504 www.ti.com VSTOR = 3.3 V VSTOR = 1.8 V VSTOR = 5.5 V Input Voltage (V) G002 VSTOR = 3V VSTOR = 1.8V VSTOR = 5.5V 0 100 Input Current (mA) G004 VSTOR = 3V VSTOR = 1.8V VSTOR = 5.5V 0.1 1 ...
Page 11
... G009 Figure 15. Settling Period vs Temperature VIN = 1 V, RIN = 20 , VBAT = ramping power supply Figure 17. Example of VBAT_OK Operation, Ramping Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 VSTOR = 1.8V VSTOR = 3V VSTOR = 4V −20 0 ...
Page 12
... VIN = 1 V, RIN = 20 , VBAT = 3.1 V, RBAT = 100 Figure 19. Example of Output Ripple Voltage During W VIN = 1 V, RIN = 20 , VBAT = 3 V, RBAT = 100 m W Figure 21. Example of Sampling Time for MPPT Operation Product Folder Link(s) :bq25504 www.ti.com W Operation Setting W Copyright © 2011, Texas Instruments Incorporated ...
Page 13
... VBAT, the PMOS switch is momentary closed and any available charge from the battery can be dumped onto VSTOR. If the resulting voltage is greater than about 1.8 V, then the bq25504’s biasing and oscillator circuits can be turned on, and start up of the boost converter will be initiated. However, if there is insufficient energy available in a connected battery, then the PMOS circuit is opened after ~20 ms, and the cold-start sequence is initiated via power provided by power at the VIN_DC input pin ...
Page 14
... ESR by-pass capacitor to prevent a droop in voltage. Battery Management In this section the battery management functionality of the bq25504 integrated circuit (IC) is presented. The IC has internal circuitry to manage the voltage across the storage element and to optimize the charging of the storage element. For successfully extracting energy from the source, three different threshold voltages must be programmed using external resistors, namely the under voltage (UV) threshold, battery good threshold (VBAT_OK) and over voltage (OV) threshold ...
Page 15
... MΩ. The overvoltage threshold when battery OV1 OV2 CAUTION ö ÷ ø OK1 Equation 5 ö OK2 O K3 ÷ ø Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 (2) Equation 3: (3) (4) (5) Submit Documentation Feedback 15 ...
Page 16
... VBAT and VSTOR will open and protect the battery even if the device is in thermal shutdown. INDUCTOR SELECTION For the bq25504 to operate properly, an inductor of appropriate value must be connected between Pin # 16 (LBST) and Pin #2 (VIN_DC) for the boost converter. For the boost converter / charger, the inductor must have an inductance = 22 µH and have a peak current capability of ≥ ...
Page 17
... For more details on how to use the thermal parameters in the Thermal Table, check the Thermal Characteristics Application Note (SZZA017) and the IC Package Thermal Metrics Application Note (SPRA953). Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :bq25504 bq25504 SLUSAH0 – OCTOBER 2011 Submit Documentation Feedback 17 ...
Page 18
... Orderable Device (1) Package Type Package Status BQ25504RGTR ACTIVE QFN BQ25504RGTT ACTIVE QFN (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. ...
Page 19
... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing BQ25504RGTR QFN RGT BQ25504RGTT QFN RGT PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 16 3000 330.0 12.4 3.3 16 250 180.0 12.4 3.3 Pack Materials-Page 1 14-Oct-2011 Pin1 ...
Page 20
... Device Package Type BQ25504RGTR QFN BQ25504RGTT QFN PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) RGT 16 3000 RGT 16 250 Pack Materials-Page 2 14-Oct-2011 Width (mm) Height (mm) 346.0 346.0 29.0 210.0 185.0 35.0 ...
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Page 24
... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...

BQ25504

BQ25504

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Specifications of BQ25504

Related parts for BQ25504

BQ25504 Summary of contents

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