EVALA5970D STMicroelectronics, EVALA5970D Datasheet - Page 27

• Manufacturer Part Number: EVALA5970D
• Description: Power Management Modules & Development Tools EVAL BOARD A5970D Auto Grade
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of EVALA5970D

• Input Voltage: 4.4 V to 36 V
• Output Voltage: 1.235 V to 35 V
• Board Size: 23 mm x 20 mm
• Product: Power Management Modules
• Supply Current: 1 A
• Dimensions: 23 mm x 20 mm
• For Use With/related Products: AN1330
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AN1330
6.3
6.4
Dual output voltage with auxiliary winding
When two output voltages are required, it is possible to create a dual output voltage
converter by using a coupled inductor. During the ON phase, the current is delivered to
V
During the OFF phase, the current is delivered through the auxiliary winding to the output
voltage V
be certain that the application is working properly, the load related to the second output
V
Figure 27. Dual output voltage with auxiliary winding
Synchronization example
Two or more devices (up to 6) can be synchronized simply by connecting the
synchronization pins. In this case, the device with a slightly higher switching frequency value
will work as master and the ones with a slightly lower switching frequency values will work
as a slaves.
The device can also be synchronized from an external source. In this case the logic signal
must have a frequency higher than the internal switching frequency of the device (250 kHz).
Figure 28. Synchronization example
OUT
OUT1
while D2 is reverse-biased.
should be much lower than the load related to V
OUT1
. This is possible only if the magnetic core has stored sufficient energy. So, to
OUT
.
Application ideas
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