Quick Start Procedure - Linear Technology DC1385A Demo Manual

DEMO MANUAL DC1385A

QUICK START PROCEDURE

Demonstration circuit DC1385A is an easy way to evalu-
ate the performance of the LTM4614EV. Please refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below:
1. Place jumpers in the following positions for a typical
1.8V and 1.2V application:
TRACK1
DISABLED
2. With the power off, connect the input power supply,
load and meters as shown in Figure 1. Preset the loads
to 0A and V supply to be less than 5.5V.
IN
3. Turn on the power at the input. The output voltage
+
between VO1 and VO1
+
voltage between VO2
4. Once the proper output voltage is established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters. To measure input and output ripple,
please refer to Figure 2 for proper setup.
2
RUN1 RUN2
ON ON
–
should be 1.8V ± 2%, and the
–
and VO2 should be 1.2V ±2%.
5. Channel 1 can track another supply by connecting TP17,
TRACK to another supply and setting JP1 to ENABLED.
Resistors R8 and R9 are set up for coincidental tracking.
Channel 2 is set up to coincidentally track the output
of channel 1 by resistor R6 and R7. Please refer to the
circuit schematic and data sheet.
6. Because DC1385A is assembled in a way that V
tracks V automatically, placing the JP2 (RUN1) to
OUT1
OFF position turns off both outputs. To disable track-
ing function of V , please remove R6 and R7 and
OUT2
connect TRACK2 to V
IN2
7. V and V are shorted on DC1385A through a
IN1 IN2
1mohm resistor, R10. If desired, remove R10 and dif-
ferent supplies can be applied to V
demo circuit.
OUT2
.
and V of this
IN1 IN2
dc1385af