STEVAL-ISA076V1
Battery charger demonstration board with integrated power switch
for Li-Ion/Li-Polymer batteries based on the L6924D
Data brief
Features
■ Operating input voltage up to 12 V
■ Fully integrated solution with power MOSFET,
reverse blocking diode, sense resistor, and
thermal control
■ Both linear and quasi-pulse operation
■ Programmable charge current both in fast
charge (up to 1 A) and in pre-charge mode
■ Selectable 4.1 V and 4.2 V output voltage (±1%
accuracy)
■ Programmable termination current
■ Programmable pre-charge mode voltage
threshold
■ Programmable charge timer
■ Multifunction pin for flexible charge process
termination
■ Status outputs to drive LEDs or host processor
interface
■ Battery absence detection
■ Closed loop thermal control
■ NTC or PTC thermistor interface for battery
temperature monitoring and protection
■ RoHS compliant
When a current-limited adapter is used, the
device can operate in quasi-pulse mode,
dramatically reducing power dissipation.
STEVAL-ISA076V1
Description
The STEVAL-ISA076V1 demonstration board is
based on the L6924D battery charger system with
integrated power switch. The L6924D device is a
fully monolithic battery charger dedicated to
single-cell lithium-ion polymer (Li-Pol) battery
packs, and is the ideal solution for space-limited
applications such as PDAs, handheld equipment,
cellular phones, and digital cameras.
When an external voltage-regulated wall adapter
is used, the L6924D works in linear mode, and
charges the battery using a constant
current/constant voltage (CC/CV) profile.
May 2011 Doc ID 18119 Rev 2 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Schematic diagram STEVAL-ISA076V1
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1 Schematic diagram
Figure 1. Internal schematic
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STEVAL-ISA076V1 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
18-Oct-2010 1 Initial release.
03-May-2011 2
– Minor text changes to the Title and Description on page 1.
– Reformatted Internal schematic on page 2.
Doc ID 18119 Rev 2 3/4
STEVAL-ISA076V1
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