LM5026EVAL National Semiconductor, LM5026EVAL Datasheet - Page 3

• Manufacturer Part Number: LM5026EVAL
• Description: BOARD EVALUATION LM5026
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM5026EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Isolated
• Voltage - Output: 3.3V
• Current - Output: 30A
• Voltage - Input: 36 ~ 78V
• Regulator Topology: Buck
• Frequency - Switching: 230kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM5026
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

Powering Up
supply folding back and the evaluation board going into
undervoltage shutdown will start an oscillation, or chatter,
that may have undesirable consequences.
A quick efficiency check is the best way to confirm that
everything is operating properly. If something is amiss you
can be reasonably sure that it will affect the efficiency ad-
versely. Few parameters can be incorrect in a switching
power supply without creating losses and potentially damag-
ing heat.
(Continued)
Typical Evaluation Setup
3
Over Current Protection
The evaluation board is configured with hiccup over-current
protection. In the event of an output overload (approximately
33A) the unit will discharge the softstart capacitor, which
disables the power stage. After a delay the softstart is re-
leased. The shutdown, delay and slow recharge time of the
softstart capacitor protects the unit, especially during short
circuit event where the stress is highest.
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