Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
Chapter 9 Timing Diagrams
9.1
PWM Outputs
The following section shows the timing for the PWM[1:3] outputs.
t1
t2
FANx
Figure 9.1 PWMx Output Timing
Table 9.1 Timing for PWM[1:3] Outputs
NAME
DESCRIPTION
MIN
TYP
MAX
UNITS
t1
t2
PWM Period (Note 9.2)
PWM High Time (Note 9.3)
0.04
0
90.9
99.6
msec
%
Note 9.2 This value is programmable by the PWM frequency bits located in the FRFx registers.
Note 9.3 The PWM High Time is based on a percentage of the total PWM period (min=0/256*TPWM
,
max =255/256*TPWM). During Spin-up the PWM High Time can reach a 100% or Full On.
(TPWM = t1).
SMSC EMC2300
Revision 0.2 (06-14-06)
DATA7S5HEET
SMSC [ SMSC CORPORATION ]
