Picor Corporation • picorpower.com

PI3101-00-HVIZ

Rev 1.1, April 29



PI3101

Cool-Power

36-75V Input, 3.3V / 18A / 60W Output

Very High Density Isolated DC-DC Converter (400W/in

Description

The Cool-Power

isolated DC-DC converter implementing a high

efficiency soft-switching power architecture. The

PI3101 operates over a wide range input of 36V to

75Vdc, delivering ~60W of output power (3.3Vout @

18A), yielding an unprecedented power density of

400W/in

surface mountable 0.87” x 0.65” x 0.265” package,

achieving

~50%

space

reduction

versus

conventional solutions.

The switching frequency of 900kHz allows for small

input and output filter components which further

reduces the total size and cost of the overall system

solution. The output voltage is sensed and fed back

to the internal controller using a proprietary isolated

magnetic feedback scheme which allows for high

bandwidth and good common mode noise immunity.

The

PI3101

requires

no

external

feedback

compensation and offers a total solution with a

minimum number of external components. A rich

feature set is offered, including output voltage trim

capability, output over-voltage protection, adjustable

soft-start, over-current protection with auto-restart,

over and under input voltage lockout and a

temperature monitoring and protection function that

provides an analog voltage proportional to the die

temperature as shut down and alarm capabilities.

PI3101-00-HVIZ

36-75Vin, 3.3Vout, 18A

Very High Density Isolated DC-DC Converter

Features



Efficiency up to 87%



High switching frequency minimizes input filter

requirements and reduces output capacitance



Proprietary “Double-Clamped” ZVS Buck-Boost

Topology



Proprietary isolated magnetic feedback



Small footprint (0.57 in

savings



Very low profile (0.265 in)



Wide input voltage range operation (36-75Vdc)



On/Off Control, positive logic



+10/-10% Trim



Temperature Monitor (TM) & Over-Temperature

Protection (OTP)



Input UVLO & OVLO and output OVP



Over current protection with auto restart



Adjustable soft-start



2250V input to output isolation

Applications



Power Over Ethernet (PoE)



Communications



Telecom Systems



Network Power

Package Information



Surface Mountable 0.87” x 0.65” x 0.265”

package

Typical Application Schematic Diagram

Figure 1 Picor PI3101 Shown With System Fuse, Filter,

Decoupling And Extended Soft Start