L6924D Battery Management ICs by STMicroelectronics

Battery charger system with integrated power switch for Li-Ion/Li-Polymer


The L6924D is a fully monolithic battery charger dedicated to single-cell Li-Ion/Polymer battery packs. It is the ideal solution for space-limited applications, like handheld equipment, and digital cameras. It integrates all of the power elements (the power MOSFET, reverse blocking diode and the sense resistor) in a small VFQFPN16 (3 x 3 mm) package. When an external voltage-regulated wall adapter is used, the L6924D works in linear mode, and charges the battery in a constant current/constant voltage (CC/CV) profile. Moreover, when a current-limited adapter is used, the device can operate in quasi-pulse mode, dramatically reducing the power dissipation. Regardless of the charging approach, a closed-loop thermal control avoids device overheating. The device has an operating input voltage ranging from 2.5 V to 12 V. The L6924D allows the user to program many parameters, such as pre-charge current, fast-charge current, pre-charge voltage threshold, end-of-charge current threshold, and charge timer. The L6924D offers two open collector outputs for diagnostic purposes, which can be used to either drive two external LEDs or communicate with a host microcontroller. Finally, the L6924D also provides very flexible control of the charge process termination and gas gauge capability, as well as other functions, such as checking for battery presence, and monitoring and protecting the battery from unsafe thermal conditions.

Prices starting from US$0.82


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Features

Fully integrated solution, with a power MOSFET, reverse blocking diode, sense resistor, and thermal protection
Ideal for coke and graphite anode single-cell LI-ION packs
Both linear and quasi-pulse operation
Closed loop thermal control
USB BUS-compatible
Programmable charge current up to 1 A
Programmable pre-charge current
Programmable end-of-charge current
Programmable pre-charge voltage threshold
Programmable charge timer
Programmable output voltage at 4.1 V and 4.2 V, with ± 1 % output voltage accuracy
(NTC) or (PTC) thermistor interface for battery temperature monitoring and protection
Flexible charge process termination
Status outputs to drive LEDs or to interface with a host processor
Small VFQFPN 16-lead package (3 x 3 mm)

Alternative Descriptions

BATT CHARGER SYSTEM LITHIUM, SMD | element14


Frequently Asked Questions

Where can I find additional details, specifications and documents for a L6924D?

Additional datasheets, footprints and schematics for L6924D are listed on our Part Details page. You can also find images and similar parts to L6924D on this page.

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What category does L6924D fall under?

The L6924D is listed under Power Management > Battery Management ICs > Battery Chargers.

Can I view similar or alternative parts?

You can view similar parts to L6924D when available in the Battery Chargers range under the specifications section at the bottom of the details page.

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Is the L6924D RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including element14 and Farnell have stock available or on a lead time for L6924D.

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