Datasheet

C1: SW (10.0 V/div)
Timebase: 50 ns/div
C1: PH (10 V/div)
C2: V
IN
AC coupled (200 mV/div)
Timebase: 2.00 µs/div
C1: PH (10 V/div)
C2: V
IN
AC coupled (50 mV/div)
Timebase: 2.00 µs/div
Test Setup and Results www.ti.com
4.6 Input Voltage Ripple
Figure 10 shows the TPS55340EVM-148 input voltage ripple. The output current is the rated full load of
2.5A at V
IN
= 12V. The ripple is measured directly across the input capacitor C2.
Figure 11 shows the TPS55340EVM-148 input voltage ripple operating in DCM. The input voltage is 12V
and the output is loaded with 20Ω (250mA).
Figure 10. Input Voltage Ripple Figure 11. DCM Input Voltage Ripple
4.7 Voltage Overshoot on SW Pin
Figure 12 shows the voltage overshoot on the SW pin with 200MHz bandwidth. This is measured with 24V
input voltage and 2.5A output current.
Figure 12. SW Pin Voltage Overshoot
8
TPS55340EVM-148, 8V to 24V Input, 5V Output Flyback Evaluation Module SLVU751A–July 2012–Revised June 2013
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