ADM1027ARQZ-RL71 ONSEMI [ON Semiconductor], ADM1027ARQZ-RL71 Datasheet - Page 48

• Manufacturer Part Number: ADM1027ARQZ-RL71
• Manufacturer: ONSEMI [ON Semiconductor]

ADM1027
Bit
<2:0>
<3>
<4>
<5>
<6>
<7>
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register
will have no effect.
Name
ACOU
EN1
Reserved
MIN1
MIN2
MIN3
Table XVIII. Register 0x62 – Enhance Acoustics Register 1 (Power-On Default = 0x00)
R/W
Read-Only
Read/Write
Read-Only
Read/Write
Read/Write
Read/Write
These bits select the ramp rate applied to the PWM1 output. Instead of PWM1 jump-
When this bit is 1, acoustic enhancement is enabled on PWM1 output. When
Reserved for future use.
When the ADM1027 is in automatic fan control mode, this bit defines whether PWM 1
When the ADM1027 is in automatic fan speed control mode, this bit defines whether
When the ADM1027 is in automatic fan speed control mode, this bit defines whether
Description
ing instantaneously to its newly calculated speed, PWM1 will ramp gracefully at the rate
determined by these bits. This feature enhances the acoustics of the fan being driven by
the PWM1 output.
acoustic enhancement is enabled, fan spin-up time should be disabled.
is off (0% duty cycle) or at PWM 1 minimum duty cycle when the controlling temperature
is below its T
0 = 0% duty cycle below T
1 = PWM 1 minimum duty cycle below T
PWM 2 is off (0% duty cycle) or at PWM 2 minimum duty cycle when the controlling
temperature is below its T
0 = 0% duty cycle below T
1 = PWM 2 minimum duty cycle below T
PWM 3 is off (0% duty cycle) or at PWM 3 minimum duty cycle when the controlling
temperature is below its T
0 = 0% duty cycle below T
1 = PWM 3 minimum duty cycle below T
Time slot increase
000 = 1
001 = 2
010 = 3
011 = 5
100 = 8
101 = 12
110 = 24
111 = 48
Rev. 3 | Page 48 of 56 | www.onsemi.com
MIN
– hysteresis value.
–48–
MIN
MIN
MIN
MIN
MIN
– hysteresis value.
Time for 33% to 100%
35 sec
17.6 sec
1.8 sec
7 sec
4.4 sec
3 sec
1.6 sec
0.8 sec
– hysteresis value.
– hysteresis
– hysteresis
– hysteresis
MIN
MIN
MIN
– hysteresis
– hysteresis
– hysteresis
REV. A