W83792G Nuvoton Technology Corporation of America, W83792G Datasheet - Page 28

• Manufacturer Part Number: W83792G
• Description: IC MONITOR H/W 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83792G

• Function: Hardware Monitor
• Topology: ADC, Fan Control, Register Bank
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Type: I²C™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.7.2.1. PWM mode :
7.7.2.2. DC mode:
W83792D/G has a 4-bit DAC, which produces 0 to 5 volts DC output that provides maximum 3 sets for
fan speed control. The analog output can be programmed in the Bank0 CR[81], CR[83], CR[94],
CR[A3],CR[A4] and CR[A5]. That is default output value is 5 V. The expression of output voltage can
be represented as follow,
The application circuit is shown as follow,
FANOUT
OUTPUT V
Duty
R1
0
−
cycle
OLTAGE
PWM Clock Input
C1
0.1U
(%)
=
= AVCC
Programmed
R4
33K
3
2
IO-12V
IO+12V
4
11
+
-
G
×
D
S
LM358
R1
NMOS
Programmed
- 22 -
47K
Figure 6.
1
R3
- 8
+12V
255
R2
bit
Register
+
-
IO+12V
- 4
PNP Transistor
C
16
NPN
bit
Q1
W83792AD/AG/D/G
FAN
Value
Register
FAN
3
2
1
×
100
Value
%
Tachometer output