Analog Devices DC2585A Manual page 5

QUICK START PROCEDURE
HIGH EFFICIENCY BOOST CIRCUIT
1. Make sure the jumper settings are as follows:
JP1: V is on the 15V position.
OUT1
JP2: EN1 is on the HI position.
2. Set PS1 and PS2 to 1V and then turn on. If AM1 and
AM2 < 10mA then set both PS1 and PS2 to 10V.
NOTE: Make sure that the sum of V
≤ 55V.
3. Set LD1 to 5mA and observe the output voltage, I
I and the output ripple on an oscilloscope.
AUX
4. Increase the load slowly up to 50mA and observe the
output voltage, I , I
IN AUX
oscilloscope.
5. If it is desired to observe PGOOD1, set PS3 to 3.3V as
shown in Figure 1 and observe PGOOD1 with a DVM,
VM4 in Figure 1.
6. If a different output voltage or input voltage is desired,
disable the LTC3290 by moving JP2 to the LO posi-
tion and then turn off LD1. Then move JP1 to the
desired V selection or replace R2 and/or R6 to
OUT1
obtain the desired output voltage. Then re-enable the
LTC3290 by returning JP2 to the HI position.
NOTE: If R2 and/or R6 are to be replaced, turn off
PS1 and PS2 to prevent damage due to soldering a
hot circuit.
7. Adjust PS1 and PS2 to the desired voltages and turn
on and set LD1 to the desired load.
8. When done, turn off LD1, PS1, PS2 and PS3.
V TRACKING BOOST CIRCUIT
IN
9. Make sure the jumper settings are as follows:
JP3: EN2 is on the HI position.
JP4: V is on the V
OUT2
10. Set PS4 and PS5 to 1V and then turn on. If AM4 and
AM5 < 10mA then set both PS4 and PS5 to 10V.
NOTE: Make sure that the sum of V
and V
IN1
, and the output ripple on an
+5V position.
IN2
and V ≤ 55V.
IN2 AUX2
DEMO MANUAL DC2585A
11. Set LD2 to 5mA and observe the output voltage, I
I , and the output ripple on an oscilloscope.
AUX
12. Increase the load slowly up to 50mA and observe the
output voltage, I
oscilloscope.
NOTE: When the LTC3290 is disabled, V
impedance and can be 0V. If an electronic load is
placed from V
AUX1
potential with respect to V
loads that are high impedance when disabled when
,
IN connecting a load between V
13. If it is desired to observe PGOOD2, set PS6 to 3.3V as
shown in Figure 1 and observe PGOOD2 with a DVM,
VM9 in Figure 1.
14. Slowly decrease PS4 to 5V and observe the out-
put voltage, I
an oscilloscope.
15. Slowly increase PS4 to 24V and observe the out-
put voltage, I
an oscilloscope.
16. To observe V
from V
OUT2
or isolated scope probe can be used to view V
with respect to V
NOTE: Do not short TP1 to GND.
17. If a different output voltage or input voltage is desired,
disable the LTC3290 by moving JP3 to the LO posi-
tion and then turn off LD2. Then move JP4 to the
desired V
OUT
Then re-enable the LTC3290 by returning JP2 to the
HI position.
NOTE: If R9 and/or R13 are to be replaced, turn off
PS4 and PS5 to prevent damage due to soldering a
hot circuit.
18. Adjust PS4 and PS5 to the desired voltages and turn
on and set LD2 to the desired load.
19. When done, turn off LD2, PS4, PS5 and PS6.
, I , and the output ripple on an
IN AUX
to V , V can have a negative
OUT2 IN2 OUT2
. Care must be used with
IN2
and V
OUT2
, I , and the output ripple on
IN AUX
, I , and the output ripple on
IN AUX
with respect to V
OUT2 IN2
to TP1, V . A differential oscilloscope
IN2
.
IN2
selection or replace R9 and/or R13.
,
IN
is high
OUT
.
IN2
, place a DVM
OUT2
Rev. 0
5