LM5035EVAL National Semiconductor, LM5035EVAL Datasheet - Page 3

• Manufacturer Part Number: LM5035EVAL
• Description: BOARD EVALUATION LM5035
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM5035EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Isolated
• Voltage - Output: 3.3V
• Current - Output: 30A
• Voltage - Input: 36 ~ 75V
• Regulator Topology: Buck
• Frequency - Switching: 400kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM5035
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

Powering Up
impedance referred to earlier. The interaction of the source
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
35A) 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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