2
dc1980af
DEMO MANUAL DC1980A
Quick start proceDure
Demonstration circuit 1980A is easy to set up to evalu-
ate the performance of the LT3514. Refer to Figure 3 for
proper measurement equipment setup and follow the
procedure below:
NOTE. When measuring the input or output voltage
ripple, care must be taken to avoid a long ground lead
on the oscilloscope probe. Measure the input or output
voltage ripple by touching the probe tip directly across
the VIN or VOUT and GND terminals. See Figure 4 for
proper scope probe technique.
1. Place JP1 to JP4 on ON position.
2. With power off, connect the input power supply to VIN
and GND.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
OUT3
V
OUT3
Maximum Output Current
V
IN
= 5.4V ~ 36V
2
A
I
OUT4
V
OUT4
Maximum Output Current
V
IN
= 5.4V ~ 36V
1
A
VOUT1(AC) VOUT1 Output Ripple
VIN = 5.4V ~ 36V, I
OUT1
= 1A
25
mV
VOUT3(AC) VOUT3 Output Ripple
VIN = 5.4V ~ 36V, I
OUT3
= 2A
25
mV
VOUT4(AC) VOUT4 Output Ripple
VIN = 5.4V ~ 36V, I
OUT4
= 1A
25
mV
performance summary
Specifications are at T
A
= 25°C
3. Turn on the power at the input.
NOTE. Make sure that the input voltage does not exceed
36V
4. Check for the proper output voltages.
NOTE. If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
5. Once the proper output voltages are established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters.
