PI3101 Datasheet, PDF (1/18 Pages) Vicor Corporation – 36-75V Input, 3.3V / 18A / 60W Output Very High Density Isolated DC-DC Converter (400W/in3)

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PI3101
Cool-Power^TM Series
36-75V Input, 3.3V / 18A / 60W Output
Very High Density Isolated DC-DC Converter (400W/in³)
Description
The Cool-Power^TM PI3101 is a very high density
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/in³. The PI3101 is available in a space saving
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.
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 in²) enables PCB area
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
PI3101-00-HVIZ
36-75Vin, 3.3Vout, 18A
Very High Density Isolated DC-DC Converter
Figure 1 Picor PI3101 Shown With System Fuse, Filter,
Decoupling And Extended Soft Start
Picor Corporation • picorpower.com
PI3101-00-HVIZ Rev 1.1, April 29^th, 2010 Page 1 of 18