PI2061 datasheet(14/16 Pages) VICOR

14 / 16 page



Picor Corporation • picorpower.com

PI2061

Rev 1.4

Page 14 of 16

Enable Input Circuit: EN

Pull EN pin to ground (return) to disable. This can be

accomplished with a signal transistor (Q1) in open

collector configuration and a pull-up resistor REN.

A 5% 360k resistor can be used to pull down on EN pin.

Note that the control signal phase is inverted.

Figure 16: PI2061 in high side +48V application, VC is

biased through a bias resistor

Layout Recommendation:

Use the following general guidelines when designing

printed circuit boards. An example of the typical land

pattern for the PI2061 is shown in Figure 17.



Use a solid ground (return) plane to reduce circuit

parasitics.



Connect Rs terminal at SP pin side, D1 cathode and all

MOSFET source pins together with a wide trace to

reduce trace parasitics and to accommodate the high

current output. Connect Rs terminal at SN pin side to

the load with a wide trace. Also connect all MOSFET

drain pins together with a wide trace to accommodate

the high current input



Kelvin connect SP pin and SN pin to Rs terminals.



The VC bypass capacitor should be located as close as

possible to the VC and SGND pins. Place the PI2061

and VC bypass capacitor on the same layer of the

board.

The VC pin and CVC PCB trace should not

contain any vias.



Dedicate a small copper area on lower layer

underneath the controller for PGND and SGND to

make a single point connection and simplify layout

inter connect. Make sure that Vin to Vout current

return path is solid underneath the MOSFET (M1) and

the sense resistor (R1).



Make sure D1 and D2 connecting traces are very short

to reduce parasitic inductance that might produce

voltage drop due MOSFET fast turn off.



Use 1oz of copper or thicker if possible to reduce trace

resistance and power dissipation.

Figure 17: PI2061 layout recommendation

Vin

PGND

GATE

SGND

PI2061

0.1µF

RTN

10K

10m

Vout

7.5K

IRF7853PbF

REN

360K

Not Recommended for New Designs

PI2061 датащи(PDF) 14 Page - Vicor Corporation

PI2061 датащи(HTML) 14 Page - Vicor Corporation

Html Pages

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

датащи скачать

ссылки URL