STEVAL-ISA026V1 STMicroelectronics, STEVAL-ISA026V1 Datasheet - Page 19

• Manufacturer Part Number: STEVAL-ISA026V1
• Description: EVAL BOARD 20A 250KHZ L6732
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA026V1

• Design Resources: STEVAL-ISA026V1 Gerber Files STEVAL-ISA026V1 Schematic STEVAL-ISA026V1 Bill of Material
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3.3V
• Current - Output: 20A
• Voltage - Input: 4.5 ~ 14V
• Regulator Topology: Buck
• Frequency - Switching: 250kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6732
• Input Voltage: 4.5 V to 14 V
• Output Voltage: 3.3 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: L6732
• Kit Application Type: Power Management - Voltage Regulator
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6732
• Other names: 497-5869

L6732
Device description
other one will be the slave. The Slave controller will increase its switching frequency
reducing the ramp amplitude proportionally and then the modulator gain will be increased.
Figure 13. Synchronization: PWM signal
Figure 14. Synchronization: Inductor currents
To avoid a huge variation of the modulator gain, the best way to synchronize two or more
devices is to make them work at the same switching frequency and, in any case, the
switching frequencies can differ for a maximum of 50 % of the lowest one. If, during
synchronization between two (or more) L6732, it's important to know in advance which the
master is, it's timely to set its switching frequency at least 15 % higher than the slave. Using
an external clock signal (f
) to synchronize one or more devices that are working at a
EXT
different switching frequency (f
) it is recommended to follow the below formula:
SW
Equation 5
≤
≤
⋅
f
f
1
3 ,
f
SW
EXT
SW
The phase shift between master and slaves is approximately 180 °.
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