MDC901-EVBHB Rev2021Jan5
MinDCet NV
Attention: Please refer to Evaluation Kit Important Notice on page 20
Page 14
The gate driver IC temperature is calculated based on the measured voltage between output pin 1 and
GND, according to:
EVB Operation Conditions
Operating conditions are conditions under which operation of the EVB is intended to be functional.
Safe usage: total power loss (Ploss) to prevent overheating and damage to EVB
Ploss= 26W max
WITH
hfan
Ploss= 6W max
WITHOUT
heatsink
CAUTION
: First confirm Ploss levels at lower operating conditions,
then continue to higher power levels / switching frequencies
Parameter
Symbol
Min.
Recommended
Max.
Unit
Notes
Vin
15
42*
V
Vbus
0
-
50
V
Absolute max of 100V including
ringing
Fsw (PWM)
0
100 to 1000
1000
kHz
Iout
0
-
30
A
Board temperature
-
-
90
°C
Do not exceed 90°C on any
component under operating
conditions
All voltage values are referenced respective to GND.
Inductor losses
The power inductor used in the MDC901-EVBHB board is a Würth Elektronik type 7443630140, with a
saturation current of 60A.
Depending on the operating conditions used on the EVB, the inductor will exhibit AC power losses,
depending on DC and AC current conditions, which will also contribute to the overall dissipation on the
board.
This inductor was characterized using the
system. Figure 8 depicts the losses depending on the
frequency and ripple current.
The ripple current will depend on the following equation (
𝛿
is the duty cycle).
𝐼
𝑟𝑖𝑝
=
𝑉
𝑏𝑢𝑠
𝛿(1 − 𝛿)
𝑓
𝑠𝑤
𝐿
𝑇𝑐ℎ𝑖𝑝 =
𝑉 − 0.48
0.0016
+ 25 [℃]
Pin=VBus * IBus
Pout = VOut * IOut
Ploss = Pin - Pout
