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- power ic
fp6908
production
30v, 1a li-ion/li-polymer linear battery charger
applications
the fp6908 is a single-cell li-ion/li-polymer battery charger ic which can be operated with an input voltage as low as 3.9v. the fp6908 can work with various types of ac adapters.
the fp6908 can also be operated as a linear charger when the ac adapter is a voltage source. the battery is charged in a cc/cv (constant current/constant voltage) profile. the charge current is programmable with an external resistor up to 1.0a with sop-8 (exposed pad), tdfn-8 (2mmx2mm) packages and 500ma with sot-23-5 packages. the fp6908 can also work with a current-limited adapter to minimize the thermal dissipation.
the fp6908 is designed with charge current thermal fold-back function to guarantee safe operation when the printed circuit board is space limited for thermal dissipation. a negative temperature coefficient (ntc) thermistor is connected between the ntc and gnd to monitor the battery or ambient temperature.
- input surge up to 30v
- no external blocking diode required
- complete charger for single-cell li-ion batteries
- support 4.2v or 4.35v charge voltage
- 1% charge voltage accuracy
- input over-voltage protection
- programmable charge current
1a for sop-8 (exposed pad) and
tdfn-8 (2mmx2mm) packages
500ma for sot-23-5 package - charge current thermal fold-back
- can operate at 3.9v after start up
- ntc interface
- less than 1µa leakage current off the battery when no input power attached or charger disabled
- sop-8 (exposed pad), tdfn-8 (2mmx2mm) and sot-23-5 packages
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| part name | package | request | |
|---|---|---|---|
| fp6908xsp | sop-8 (exposed pad) |
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| fp6908xd6 | tdfn-8 (2mmx2mm) |
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| fp6908xs5 | sot-23-5 |
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| fp6908xd6a | tdfn-8 (2mmx2mm) |
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