fs3861 Fortune Semiconductor Corporation, fs3861 Datasheet - Page 21

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fs3861

Manufacturer Part Number
fs3861
Description
Intelligent Charger Management Controller
Manufacturer
Fortune Semiconductor Corporation
Datasheet
does, and so on. Then, we know that we may get the same energy weighting (or counts of positive pulse) in the
16-bit period of time if we set the same value on PDM[15:0] and PWM[15:0]. If we zoom into the 8-bit period of
time from the beginning within the 16-bit period with the setting of PDM[15:0]= 1000-0000-0000-0000b =
PWM[15:0], we will see that PDM offers better energy transformation than PWM does. PDM still offers half energy
(128 counts of positive pulse) within the 8-bit period of time from the beginning within the 16-bit period, but PWM
offers full energy (256 counts of positive pulse) within the same period.
0.19*Full-Scale and vice versa. Also note that the software PWM enable bit SPMWEN (ADDRESS 13H) should be
set inactive low to enable the hardware PWM for the PWM generated specific voltage.
Fortune Semiconductor Corp.
PWCS [2:0]
For example, if the PWM [15:0] =30A4H, then the voltage level is Full-Scale*(30A4H / FFFFH) =
PWDCON : ADDRESS 0FH
bit[7:5]
bit4
bit3
bit[2:0]
Select
bit7
-
unimplemented
PWEN: Enable Pulse Density Modulation clock output.
unimplemented
PWCS[2:0] selects Pulse Density Modulation clock input source. Setting as below:
000
-
bit6
-
001
-
bit5
-
010
-
PWEN
bit4
011
21/34
-
bit3
4MHz/32
-
100
PWCS[2]
bit2
4MHz/64
101
PWCS[1] PWCS[0]
bit1
4MHz/128
110
FS3861
bit0
4MHz/256
111
Rev. 1.0

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