BQ4H136EEC45 Datasheet, PDF (12/13 Pages) SynQor Worldwide Headquarters – Industry standard eighth-brick pin-out configuration

Applications Section
Input: 230-400 V
Output: 13.6 V
Current: 45 A
Package: EXTENDED Eighth-brick
Current Sharing: BQ4H BusQor modules are designed to
operate in parallel without the use of any external current share
circuitry. Current sharing is achieved through “Droop Share”. An
output capacitor is recommended across each module and located
close to the converter for optimum filtering and noise control
performance. Dedicated input inductors are recommended but are
considered optional. Input capacitors must be located close to the
converter module. PCB layout in the input circuit should be such
that high frequency ripple currents of each module is restricted
to a loop formed by the input capacitors and the input terminals
of the BusQor module. See Figure G for details on PCB layout.
Contact SynQor application engineering for further assistance on
PCB trace design.
The current share performance of two paralleled modules is
illustrated in the graph in Figure H. In this graph the percent
deviation from ideal sharing (50%) is plotted for each module
versus the total output load current at 385 Vin. Two BQ4H Bus
Qor’s will share within 10% at higher loads. The current share
accuracy is affected by changes in the gate drive timing. The gate
drive timing is adjusted as a function of load to better optimize the
product efficiency over line and load (performance), resulting in
higher load share deviations at lighter loads.
20.0%
15.0%
10.0%
5.0%
0.0%
-5.0%
-10.0%
-15.0%
Module 1
Module 2
-20.0%
10
20
30
40
50
60
70
80
90
Total Load Current (A)
Figure H: Typical current share performance of 2 paralleled modules
385 Vin
CM EMI
filter
Bulk
Cap
BusQor module
BusQor module
Input LC filters
Figure G: Recommended physical implementation of two Bus Qor's in parallel.
Product # BQ4H136EEC45
Phone [phone]
www.synqor.com
Doc.#005-0006641 Rev. C
05/11/16
Page 12