Datasheet

0.0 0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
70
75
80
85
90
EFFICIENCY (%)
V
OUT
= 5.0V
F
SW
= 300 kHz
V
IN
= 48V
V
IN
= 72V
V
IN
= 36V
Typical Performance Characteristics www.ti.com
5 Typical Performance Characteristics
Figure 3 shows the overall efficiency of the evaluation board in the Two-Switch Forward configuration.
Figure 3. Evaluation Board Efficiency vs Input Voltage vs Load
Figure 4 shows key voltage waveforms at switch nodes HO and LO under full load (2.5A) and mid input
voltage (48V).
Horizontal Resolution: 0.5 µs/div
Trace 1: The HO pin voltage. 20V/div
Trace 2: The LO pin voltage. 20V/div
Operating condition: Vin = 48V, Vout = 5V, Iout = 2.5A
Figure 4. Key Voltage Waveforms at the HO and LO Pins
4
AN-1724 LM5015 Isolated Two-Switch DC-DC Regulator Evaluation Board SNVA291A–October 2007–Revised April 2013
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