Texas Instruments Isolated Flyback Topology Module for TPS55340 TPS55340EVM-148 TPS55340EVM-148 데이터 시트
제품 코드
TPS55340EVM-148
C4: V
OUT
AC coupled (100 mV/div)
C3: I
OUT
(1.00 A/div)
Timebase: 200 µs/div
10
100
1k
10k
100k
1M
−60
−40
−20
0
20
40
60
−180
−120
−60
0
60
120
180
Frequency (Hz)
Gain (dB)
Phase (°)
Gain
Phase
Phase
Iout = 2.5 A
Vin = 12 V
Vin = 12 V
G006
Test Setup and Results
4.4
Load Transient and Loop Response
show the TPS55340EVM-148 response to load transients. The current step is from 25% to 75%
of maximum rated load at V
IN
= 12V. The current step slew rate is 100 mA/µs. Total peak-to-peak voltage
variation is as shown, including ripple and noise on the output.
shows the TPS55340EVM-148 loop-response characteristics. Gain and phase plots are shown
for V
IN
voltage of 12V with load current of 2.5A. The loop-response measurement is taken by replacing R3
with a 49.9-
Ω
resistor. The signal is then injected across it with test points TP2 and TP6.
Figure 5. Load Transient Response
Figure 6. Loop Response
6
TPS55340EVM-148, 8V to 24V Input, 5V Output Flyback Evaluation Module
SLVU751A – July 2012 – Revised June 2013
Copyright © 2012–2013, Texas Instruments Incorporated