Fujitsu MB3887 Manual Do Utilizador

20

■

• With an external resistor connected to the 

+

INE2 terminal (pin 3) , the IC enters the dynamically-controlled

charging mode to reduce the charge current to keep AC adapter power constant when the partial potential
point A of the AC adapter voltage (VCC) becomes lower than the voltage at the 

−

INE2 terminal.

 

AC adapter detection voltage setting : Vth

Vth (V)  

=

  (R1 

+

 R2)  

/

 R2 

×

  

−

INE2

■

−

+

VCC

R1

R2

+

INE2

−

INE2

A

<Error Amp2>

4

3

2.5 V

1.5 V

Error Amp2 FB2

Error Amp1 FB1

Error Amp2 FB3

OUT

Constant voltage control

Constant current control

AC adapter dynamically-

controlled charging