Texas Instruments Evaluation Module Board for TPS61252 3.5MHz, 1.5A, 92% Efficient Step-up (Boost) Converter TPS61252EVM TPS61252EVM-667 Datenbogen
Produktcode
TPS61252EVM-667
V
= 50 mV/div
O
I = 200 mA/div
L
t - Time - 5 ms/div
V = 3.3 V,
V
= 5 V,
I
= 0 mA
I
O
O
V
= 50 mV/div
O
I = 200 mA/div
L
t - Time - 0.2
s/div
m
V = 3.3 V,
V
= 5 V,
I
= 310 mA
I
O
O
V
= 50 mV/div
O
I = 200 mA/div
L
t - Time - 0.2
s/div
m
V = 3.3 V,
V
= 5 V,
I
O
TPS61252 EVM Test Data
www.ti.com
5.3
Output Voltage Ripple
Figure 6. TPS61252 EVM Output Voltage Ripple at No
Figure 7. TPS61252 EVM Output Voltage Ripple at
Load
Load Limit
Figure 8. TPS61252 EVM Output Voltage Ripple at Overload
5.4
Control Loop Bode Diagram
The stability was measured with an input voltage of 3.3 V and an output current of 244 mA. The crossover
frequency of 47 kHz and the phase margin of 42° correlate with the good load transient response of the
part.
frequency of 47 kHz and the phase margin of 42° correlate with the good load transient response of the
part.
Figure 9. TPS61252 EVM Gain and Phase vs. Frequency
6
TPS61252 Evaluation Module
SLVU408 – October 2010
Copyright © 2010, Texas Instruments Incorporated