LM5001NISOEVAL National Semiconductor, LM5001NISOEVAL Datasheet - Page 5

• Manufacturer Part Number: LM5001NISOEVAL
• Description: BOARD EVALUATION FOR LM5001
• Manufacturer: National Semiconductor

Specifications of LM5001NISOEVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 5V
• Current - Output: 1A
• Voltage - Input: 16 ~ 42V
• Regulator Topology: Flyback
• Frequency - Switching: 250kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM5001
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Not Compliant

Performance Characteristics
EFFICIENCY PLOTS
Figure 1 shows the conversion efficiency versus output cur-
rent for several input voltage conditions.
TURN-ON WAVEFORM
When applying power to the LM5001 evaluation board a soft-
start sequence occurs. Figure 2 shows the output voltage
during a typical start-up sequence.
Conditions: Input Voltage = 28VDC, Output Current = 1A
Trace 1: Output Voltage Volts/div = 1V
Horizontal Resolution = 5ms/div
FIGURE 1.
FIGURE 2.
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OUTPUT RIPPLE WAVEFORM
Figure 3 shows the output voltage ripple. This measurement
was taken with the scope probe tip placed on the J3 load ter-
minal and the scope probe ground "barrel" pushed against the
J4 load terminal. The scope bandwidth is set to 20 MHz.
Conditions: Input Voltage = 28VDC, Output Current = 1A,
Bandwidth Limit = 20MHZ
Trace 1: Output Ripple Voltage Volts/div = 50mV
Horizontal Resolution = 2µs/div
PRIMARY SWITCH NODE WAVEFORM
FIGURE 4 shows the typical primary voltage during continu-
ous conduction mode (CCM).
Conditions: Input Voltage = 28VDC, Output Current = 1A,
Bandwidth Limit = 20MHZ
Trace 1: LM5001 SW Pin Volts/div = 10V
Horizontal Resolution = 2µs/div
FIGURE 3.
FIGURE 4.
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