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ADP3806,pdf,datasheet,High Fre
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大小:433 |
2010-03-01
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The ADP3806 is a complete Li-Ion battery-charging IC. The
device combines high output voltage accuracy with constant
current control to simplify the implementation of constantcurrent,
constant-voltage (CCCV) chargers. The ADP3806 is
available in three options: The ADP3806-12.6 guarantees the
final battery voltage selected is 12.6 V or 16.8 V ± 0.6%, the
ADP3806-12.5 guarantees 12.525 V/16.7 V ± 0.6%, and the
ADP3806 is adjustable using two external resistors to set the
battery voltage. The current sense amplifier has rail-to-rail inputs
to accurately operate under low dropout and short-circuit conditions.
The charge current is programmable with a dc voltage on
ISET. A second differential amplifier senses the system current
across an external sense resistor and outputs a linear voltage
on the ISYS pin. The bootstrapped synchronous driver allows
the use of two NMOS transistors for lower system cost.
device combines high output voltage accuracy with constant
current control to simplify the implementation of constantcurrent,
constant-voltage (CCCV) chargers. The ADP3806 is
available in three options: The ADP3806-12.6 guarantees the
final battery voltage selected is 12.6 V or 16.8 V ± 0.6%, the
ADP3806-12.5 guarantees 12.525 V/16.7 V ± 0.6%, and the
ADP3806 is adjustable using two external resistors to set the
battery voltage. The current sense amplifier has rail-to-rail inputs
to accurately operate under low dropout and short-circuit conditions.
The charge current is programmable with a dc voltage on
ISET. A second differential amplifier senses the system current
across an external sense resistor and outputs a linear voltage
on the ISYS pin. The bootstrapped synchronous driver allows
the use of two NMOS transistors for lower system cost.
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