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HV7100NG-GM903 Datasheet(PDF) 5 Page - Supertex, Inc

Part No. HV7100NG-GM903
Description  24/48V Fan Driver/Controller With High-Side Drive
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Maker  SUTEX [Supertex, Inc]
Homepage  http://www.supertex.com
Logo SUTEX - Supertex, Inc

HV7100NG-GM903 Datasheet(HTML) 5 Page - Supertex, Inc

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Supertex inc.
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Doc.# DSFP-HV7100
B072413
HV7100
When using linear control mode, DIN0 – DIN3 should be set
to logic 0. If desired, DIN may be used to set a lower limit on
the fan speed. This input is immune to moderate noise on
the control signal.
Digital Control - Applying logic signals to the DIN0 – DIN3
pins sets the duty cycle of the output. 0000 = 0% and 1111
= 100%. See Table 1 for details. In digital control mode, LIN
should be set to 0V. DIN0 – DIN3 pins have internal pull
downs so that the DAC output will default to 0V when it is
not used.
External PWM - An external PWM signal can be applied
to the Enable pin to directly control the duty cycle. A logic 0
turns the transistor off, and a logic 1 turns it on. When using
this control method, connect DIN0 – DIN3, LIN, and R
T to
V
DD. Connect CT to GND.
The DAC output and the Linear Control signals are OR’d
together. Whichever has the higher value dominates. This
allows an analog temperature sensing circuit to override the
digital inputs (DIN0 – DIN3) for added system protection.
The following table illustrates the correlation between the
digital inputs and LIN voltage to the PWM duty cycle.
Table 1. DAC signal and LIN voltage to Duty
Cycle Programming.
* Guaranteed 0% @ 0000 and 100% @ 1111
DIN3 DIN2 DIN1 DIN0
LIN
Gate Drive
Duty Cycle
0
0
0
0
0.500V
0%*
0
0
0
1
0.633V
6.7%
0
0
1
0
0.766V
13.3%
0
0
1
1
0.900V
20.0%
0
1
0
0
1.033V
26.7%
0
1
0
1
1.167V
33.3%
0
1
1
0
1.300V
40.0%
0
1
1
1
1.433V
46.7%
1
0
0
0
1.567V
53.3%
1
0
0
1
1.700V
60.0%
1
0
1
0
1.833V
66.7%
1
0
1
1
1.967V
73.3%
1
1
0
0
2.100V
80.0%
1
1
0
1
2.233V
86.7%
1
1
1
0
2.367V
93.3%
1
1
1
1
2.500V
100%*
PWM Fan Drive
V
PP
D3
EN
VGATE
OUT
GND
VDD
VPP1
HV7100
LIN
CT
RT
VPP2
V
DD
D2
D1
D0
When using direct PWM drive to the fans, it is best to set a
low PWM frequency, in the range of 50Hz -120Hz.


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