BQ25504 Datasheet, PDF (1/24 Pages) Texas Instruments – Ultra Low Power Boost Converter with Battery Management for Energy Harvester Applications

bq25504
www.ti.com
SLUSAH0 – OCTOBER 2011
Ultra Low Power Boost Converter with Battery Management for Energy Harvester
Applications
Check for Samples: bq25504
FEATURES
1
• Ultra Low Power With High Efficiency DC/DC
Boost Converter/Charger
– Continuous Energy Harvesting From Low
Input Sources: V_IN ≥ 80 mV(Typical)
– Ultra Low Quiescent Current: I_Q < 330 nA
(Typical)
– Cold-Start Voltage: V_IN ≥ 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
• Battery Status Output
– Battery Good Output Pin
– Programmable Threshold and Hysteresis
– Warn Attached Microcontrollers of Pending
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
Solar ⁺
Cell
-
CHVR
LBST
ROC 2
ROC 1
CSTOR
Battery
VSTOR
16 15 ^` 14
LBST VSTOR
1 VSS
VBAT
13
VSS
AVSS 12
CREF
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
SYSTEM
LOAD
VBAT_OK
ROK1
ROK2
ROK3
ROV2
ROV1
RUV 2
RUV 1
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.
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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.
Copyright © 2011, Texas Instruments Incorporated