Tektronix MSO64 — основы анализа потерь в переключающих источниках питания [586/628]

Tektronix MSO64 [586/628] Switching loss algorithm
Power measurements: Switching Analysis algorithms
Power measurements require option 5-PWR or 6-PWR.
Switching Loss algorithm
Switch-Mode Power Supply (SMPS) design has three types of losses, they are Turn-On (T
on
), Turn-off (T
off
), and Conduction
loss (Cond). To achieve the maximum efficiency, losses should be reduced. This section details about the basics of Switching
Loss Analysis. A simplified SMPS schematic is shown below:
SMPS circuit diagram shows the points where switching loss can be measured. After full wave rectification, the current signal
should pass through the harmonic standard and enters for DC conversation. MOSFIT plays an important role to meet the design
of SMPS.
Regions of T
on
, T
off
, and Conduction loss (Cond) with voltage source (Vds) and current source (Ids) are shown in Switching Loss
T
on
, T
off
, and Conduction loss regions.
All the switching losses are measured on Power signal, based on Vds and Ids transition.
T
on
Loss region: When Vds starts rolling towards zero, the Ids starts to roll upward.
T
off
Loss region: When Vds starts rolling upwards, the Ids start to roll towards zero.
Conduction Loss region: The region when the Ids is high and Vds is low.
T1 is the First switching cycle.
Measurement algorithms
556 4/5/6 Series MSO Help

Содержание

Изучите методы измерения потерь в переключающих источниках питания. Узнайте о ключевых алгоритмах и принципах для повышения эффективности SMPS.

Скачать