PI2007 datasheet(13/19 Pages) VICOR

13 / 19 page



Picor Corporation • picorpower.com

PI2007

Rev 1.3

Page 13 of 19

Typical application Example 1:

Requirement:

Redundant Bus Voltage = 12V (±10%, 10.8V to

13.2V)

Load Current = 15A (assume through each redundant

path)

Maximum Ambient Temperature = 75°C

Solution:

A single PI2007 with a suitable external MOSFET for

each redundant 12V power source should be used,

configured as shown in the circuit schematic in Figure

16.

Select a suitable N-Channel MOSFET:

Most

industry standard MOSFETs have a Vgs rating of +/-

12V or higher. Select an N-Channel MOSFET with a

low RDS(on) which is capable of supporting the full load

current with some margin, so a MOSFET capable of

at least 18A in steady state is reasonable.

exemplary MOSFET having these characteristic is the

FDS6162N7 from Fairchild.

From FDS6162N7 datasheet:



N-Channel MOSFET



VDS= 20V



ID = 23A continuous drain current



ID(Pulse) = 60A Pulsed drain current



VGS(MAX)=

 12V



RθJA= 40°C/W when mounted on a 1in

2 PCB

pad of 2 oz copper



RDS(on)=2.9mΩ typical and 3.5mΩ maximum at

ID=23A, VGS≥4.5V, TJ=25°C

Reverse current threshold is:

Rds

reverse

Vth

reverse

)

(











Power dissipation:

RDS(on) is 3.5mΩ maximum at 25°C & 4.5Vgs and will

increase as the temperature increases. Add 25°C to

maximum ambient temperature to compensate for the

temperature rise due to power dissipation. At 100°C

(75°C + 25°C) RDS(on) will increase by 28%.











)

(

maximum at 100°C

)

(

Rth

Trise





Maximum Junction temperature

Trise





max





























115

)

(

max

Recalculate

based

increased

Junction

temperature, 115°C.

At 115°C RDS(on) will increase by 32%.











)

(





























116

)

(

max

VC Bias: Vin maximum input is 13.2V, this is higher

than the 11V VC Clamp Voltage (VVC-SGND) minimum.

Use the high side PI2007 internal resistor between VR

pin and VC pin will fit for this application.

Since the MOSFET requires only 4.5V for full

enhancement

then

the

PI2007

internal

resistor

between VR pin and VC pin will fit for this application.

Connect VR to Vin at the source of the MOSFET and

connect a 1

μF ceramic capacitor between VC pin and

SGND pin.

Fault Indication:

Connect FT pin to the logic input and to the logic

power supply via a 10KΩ resistor.

Figure 16: PI2007 in 12V bus high side Active ORing

configuration

PI2007 数据表(PDF) 13 Page - Vicor Corporation

PI2007 数据表(HTML) 13 Page - Vicor Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

数据表下载