PQ60400HZX15 Datasheet, PDF (13/16 Pages) SynQor Worldwide Headquarters – Fixed frequency switching provides predictable EMI performance

Applications Section
Input: 35-75V
Output: 40V
Current: 15A
Package: Half-brick
Active Current Share Application Section
Overview: The full-featured option, which is specified by an “F” as
the last character of the part number, supports current sharing by
adding two additional pins: SHARE(+) and SHARE(-)
Connection of Paralleled Units: Up to 100 units can be placed
in parallel. In this current share architecture, one unit is dynamically
chosen to act as a master, controlling all other units. It cannot be
predicted which unit will become the master at any given time, so
units should be wired symmetrically (see Figures F & G).
• Input power pins and output power pins should be tied
together between units, preferably with wide overlapping
copper planes, after any input common-mode choke.
• The SHARE(+) and SHARE(-) pins should be routed
between all paralleled units as a differential pair.
• The ON/OFF pins should be connected in parallel, and rise/fall
times should be kept below 2 ms.
• The SENSE(+) and SENSE(-) pins should be connected either
locally at each unit or separately to a common sense point. If
an output common-mode choke is used, sense lines should be
connected on the module-side of the choke.
• If the TRIM pin is used, then each unit should have its own
trim resistor connected locally between TRIM and SENSE(+)
or SENSE(-).
≥1 nF
Elec.
Cap.
Vin(+)
On/Off
Share(+)
Share(-)
Vin(-)
Vout(+)
Sense(+)
Trim
Sense(-)
Vout(-)
470 nH (nom)
A
A
≥10 μF
B
B
Load
Electrolytic
Capacitor
Vin(+)
On/Off
Share(+)
Share(-)
Vin(-)
Vout(+)
Sense(+)
Trim
Sense(-)
Vout(-)
470 nH (nom)
A
≥10 μF
B
Electrolytic
Capacitor
Up to 100 Units
Vin(+)
On/Off
Vout(+)
Sense(+)
Share(+)
Share(-)
Vin(-)
Trim
Sense(-)
Vout(-)
470 nH (nom)
A
≥10 μF
B
Figure F: Typical Application Circuit for Paralleling of Full-Featured Units with an Input Common-Mode Choke. If an input common-mode choke is used, Vin(-)
MUST be tied together AFTER the choke for all units. 470 nH (nominal) inductor or an output common-mode choke is required for outputs >18 V. See Figure G for
output common-mode choke configuration.
Product # PQ60400HZx15
Phone [phone]
www.synqor.com
Doc.# 005-0005988 Rev. D
03/04/14
Page 13