Key facts
- Brand
- Linear Technology
- Model
- LTC4071
- Category
- Other Electronics
- Documents
- 3
- Languages
- EN
- Last added
- 2012-06-05
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LINEAR LTC4071_LTC3588 Manual
The document details the design of a complete energy-harvesting power subsystem for wireless sensor-transmitters. It utilizes a piezoelectric transducer to gather intermittent power, which is stored in Li-Polymer batteries managed by an integrated disconnect switch to prevent over-discharge.
The system operates in two modes: charging-sending and discharging-sending. Key components include the LTC3588-1 buck regulator and two LTC4071 shunt battery chargers, which manage float voltage with temperature compensation and provide low-leakage disconnect circuits to protect battery life.
Linear Technology LTC4071 specifications
| Harvested Energy Power Range | about 1mw-10mw |
|---|---|
| Active Sensor-Transmitter Power Requirement | 1comw-250mw |
| Battery Capacity | 8mah |
| Float Voltage Setting | 4.1v |
| Maximum Float Voltage Tolerance | +1% |
| Charging Time from Empty | about 75 hours |
Source: LINEAR LTC4071_LTC3588 Manual
All Linear Technology LTC4071 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How is the battery protected from over-discharge?
The LTC4071 provides an internal low battery disconnect circuit to ensure the battery voltage never falls below a safe limit (e.g., 2.7v or 3.2V).
What happens when the piezoelectric transducer stops delivering power?
The system enters discharging-sending mode, where the batteries supply energy until the disconnect circuit activates to protect them.
What is the minimum solar panel voltage required for the LTC3105 to start up?
The converter can begin operation with an input as low as 250mV.
What is the maximum output charge current produced by a 2-cell solar panel in full sunlight?
The system produces over 600mA of charge current under these conditions.
What is the maximum charge current of the LTC4071?
The maximum shunt current for the LTC4071 is 50mA.
From: LINEAR 2PB_4071 Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect
Can the LTC4071 charge from intermittent power sources?
Yes, it can charge from previously unusable very low current, intermittent or continuous charging sources.
From: LINEAR 2PB_4071 Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect