ADT7463ARQZ ON Semiconductor, ADT7463ARQZ Datasheet - Page 44

• Manufacturer Part Number: ADT7463ARQZ
• Description: IC REMOTE THERMAL CTRLR 24-QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7463ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7463
Bit
<2:0>
<3>
<6:4>
<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
ACOU3
EN3
ACOU2
EN2
Table XXII. Register 0x63 – Enhance Acoustics Reg 2 (Power-On Default = 0x00)
R/W*
Read/Write
Read/Write
Read/Write
Read/Write
Description
These bits select the ramp rate applied to the PWM3 output. Instead of PWM3 jump-
ing instantaneously to its newly calculated speed, PWM3 ramps gracefully at the rate
determined by these bits. This effect enhances the acoustics of the fan being driven by the
PWM3 output.
Time Slot Increase
000 = 1
001 = 2
010 = 3
011 = 5
100 = 8
101 = 12
110 = 24
111 = 48
When this bit is 1, acoustic enhancement is enabled on PWM3 output.
These bits select the ramp rate applied to the PWM2 output. Instead of PWM2
jumping instantaneously to its newly calculated speed, PWM2 ramps gracefully at the
rate determined by these bits. This effect enhances the acoustics of the fans being driven
by the PWM2 output.
Time Slot Increase
000 = 1
001 = 2
010 = 3
011 = 5
100 = 8
101 = 12
110 = 24
111 = 48
When this bit is 1, acoustic enhancement is enabled on PWM2 output.
Rev. 4 | Page 44 of 52 | www.onsemi.com
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Time for 33% to 100%
35 s
17.6 s
11.8 s
7 s
4.4 s
3 s
1.6 s
0.8 s
Time for 33% to 100%
35 s
17.6 s
11.8 s
7 s
4.4 s
3 s
1.6 s
0.8 s
REV. C