TPS55340
www.ti.com
SLVSBD4 –MAY 2012
CHARACTERISTICS OF THE BOOST CONVERTER
100
95
90
85
80
75
70
65
VOUT (ac coupled) = 500mV/div
IOUT = 200mA/div
60
VIN = 5 V
VIN = 12 V
55
50
0
0.4
0.8
1.2
1.6
2
Time - 1ms/div
Output Current (A)
G017
Figure 17. Efficiency vs Output Current
Figure 18. Load Transient Response
IL = 1A/div
IL = 1A/div
VOUT (ac coupled) = 100mV/div
VOUT (ac coupled) = 10mV/div
SW = 20V/div
SW = 20V/div
Time - 1ms/div
Time - 1ms/div
Figure 19. CCM PWM Operation
Figure 20. DCM PWM operation
VIN = 1V/div
EN = 2V/div
IL = 200mA/div
VOUT (ac coupled) = 20mV/div
SW = 10V/div
SW = 20V/div
VOUT = 10V/div
Time - 50ms/div
Time - 500ms/div
Figure 21. Pulse Skipping
Figure 22. Start Up
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