4
dc1663af
DEMO MANUAL DC1663A
QUICK START PROCEDURE
Figure 2. Measured Efficiency on Channel 1
(V
OUT1
= 1.5V, f
SW
= 400kHz, Channel 2 Disabled)
Figure 4. Measured Channel 1 Load Transient
(V
IN
= 12V, V
OUT1
= 1.5V)
Figure 3. Measured Efficiency on Channel 2
(V
OUT2
= 1.2V, f
SW
= 400kHz, Channel 1 Disabled)
Figure 5. Measured Channel 2 Load Transient
(V
IN
= 12V, V
OUT2
= 1.2V)
1663 F04
V
OUT1
AC-COUPLED
20MHz BW
100mV/DIV
I
OUT1
0A TO 4A STEP
3.3A/DIV
1663 F05
V
OUT2
AC-COUPLED
20MHz BW
100mV/DIV
I
OUT2
0A TO 4A STEP
3.3A/DIV
Figure 6. Measured Output Voltage Ripple at 12V Input, 1.5V and
1.2V Output, 8A Per Channel with Standard Demo Circuit Default Setup
LOAD CURRENT (A)
0
EFFICIENCY (%)
6
4
5
3
1663 F02
95
90
2
1
8
7
85
80
75
60
70
65
5V
IN
9V
IN
12V
IN
15V
IN
18V
IN
LOAD CURRENT (A)
0
EFFICIENCY (%)
5
6
7
4
3
1663 F03
95
90
2
1
8
85
80
75
60
70
65
5V
IN
9V
IN
12V
IN
15V
IN
18V
IN
1663 F06
1.5V OUTPUT
AC-COUPLED
20MHz BW
50mV/DIV
1.2V OUTPUT
AC-COUPLED
20MHz BW
50mV/DIV
