Step-down DC-DC converter at 3.3 Vout/20 A and switching
frequency of 400 kHz evaluation board based on L6730
Features
■ Input voltage, Vin: 4.5 to 14 V
■ Output voltage: 3.3 V
■ Selectable switching frequency
■ Overvoltage protection
■ Thermal shut-down
Description
This 4-layer PCB demoboard implements a stepdown DC/DC converter and shows the operation
of the L6730 device in a general-purpose
application. The input voltage can range from
4.5 V to 14 V and the output voltage is 3.3 V. The
module can deliver an output current in excess of
30 A. The switching frequency is set at 400 kHz
(controller free-running FSW), but it can be
increased up to 1 MHz. A 7-position dip-switch
selects the UVLO threshold (5 V or 12 V bus), the
OVP intervention mode and the sink-mode current
capability.
STEVAL-ISA025V1
Data Brief
STEVAL-ISA025V1
August 2007 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Board schematic STEVAL-ISA025V1
1 Board schematic
Figure 1. Scheme
2/4
STEVAL-ISA025V1 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
27-Aug-2007 1 Initial release.
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STEVAL-ISA025V1
y
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