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PI2001 Datasheet(PDF) 19 Page - Vicor Corporation

Part # PI2001
Description  Universal Active ORing Controller IC
PDF  23 Pages
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Manufacturer  VICOR [Vicor Corporation]
Direct Link  http://www.vicorpower.com
Logo VICOR - Vicor Corporation

PI2001 Datasheet(HTML) 19 Page - Vicor Corporation

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Vaux:
Connect each controller to the return path with
a separate bias resistor, Rbias.
Picor Corporation • picorpower.com
PI2001
Rev 1.0
Page 19 of 23
To reduce
power dissipation,
is
selected at 13V which is less than the actual PI2001
clamp voltage (15V typical). 13V is higher than PI2001
maximum gate clamp voltage (10.5V).
Rbias
clamp
VC
Ω
=
−
=
−
=
K
mA
V
V
IC
VC
Vaux
Rbias
clamp
48
.
5
2
.
4
13
36
max
min
or 5.49KΩ
Rbias maximum power dissipation is at maximum
input voltage and minimum clamp voltage
mW
K
V
V
Rbias
VC
Vaux
Pd
clampMIN
Rbias
369
49
.
5
)
15
60
(
)
(
2
2
max
=
Ω
−
=
−
=
3. SP and SN pins: Connect the SP pin to the
MOSFET source and controller GND pin, and
connect the SN pin to Vin- and the drain of the
MOSFET.
4. BK pin: Connect the BK pin to the GND pin to
achieve the minimum reverse current response
time.
5.
SL pin: Not required, so leave floating.
6.
FT pin: Connect the FT pin to logic input and
to the logic power supply or to the VC pin via a
resistor.
7. UV and OV inputs: sensing input voltages Vin1-
and Vin2- separately in this application the
resistor divider has to be connected between
Vin1-/Vin2- and return. The PI2001 controller
GND pins are referenced to the load side, if the
resistor dividers are connected between Return
and Vin1-/Vin2- it will produce an error due the
voltage drop across the MOSFET and will expose
the OV and UV controller inputs to a high current
in case of an input short circuit and will damage
the controller.
The voltage across the load can be monitored by
one controller or both. The following shows the
resistor voltage divider configuration using the
three-resistor divider configuration:
Set
A
I
Ra
μ
100
=
Ω
=
=
=
k
A
mV
I
UV
V
Ra
Ra
TH
5
100
500
)
(
μ
or 4.99kΩ 1%
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
=
1
)
(
)
(
UV
V
OV
V
Ra
Rb
Ω
=
⎟
⎠
⎞
⎜
⎝
⎛
−
Ω
=
K
V
V
k
55
.
4
1
34
65
99
.
4
Or Rb=4.53KΩ
()
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
+
=
1
)
(
)
(
TH
UV
V
UV
V
Rb
Ra
Rc
()
Ω
=
⎟
⎠
⎞
⎜
⎝
⎛
−
Ω
+
Ω
=
k
mV
V
K
k
Rc
638
1
500
34
53
.
4
99
.
4
or 634kΩ 1%
Figure 17:
PI2001 in low side -48V application



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