4
dc2151af
DEMO MANUAL DC2151A
Quick start proceDure
Using short twisted pair leads for any power connections,
with all loads and power supplies off, refer to Figure 4 for
the proper measurement and equipment setup.
Follow the procedure below:
1. Before connecting PS1 to the DC2151A, PS1 must have
its current limit set to 300mA and PS2 must have its
current limit set to 100mA. For most power supplies
with a current limit adjustment feature the procedure
to set the current limit is as follows. Turn the voltage
and current adjustment to minimum. Short the output
terminals and turn the voltage adjustment to maximum.
Adjust the current limit to 300mA for PS1 and 100mA
for PS2. Turn the voltage adjustment to minimum and
remove the short between the output terminals. The
power supply is now current-limited to 300mA and
100mA respectively.
2. Initial Jumper, PS and LOAD settings:
JP1 = 0
JP2 = 0
JP3 = 0
JP4 = 0
JP5 = 0
JP6 = 0
JP7 = 0
JP8 = 0
JP9 = 0
JP10 = 0
JP11 = RUN JP12 = OFF
PS1 = OFF PS2 = OFF LOAD1 = OFF
Remove battery from battery holder
3. Connect PS1 to the V
IN
Terminals, then turn on PS1
and slowly increase voltage to 2.0V while monitoring
the input current. If the current remains less than 5mA,
increase PS1 to 5.0V.
4. Set LOAD1 to 50mA. Verify voltage on V
OUT
is within the
V
OUT
1.8V range listed in the Performance Summary.
Verify that the output ripple voltage is between 10mV
and 50mV. Verify that PGV
OUT
is high. Decrease
LOAD1 to 5mA. Verify that PGV
OUT
and EH_ON are
high. Decrease PS1 to 2.0V. Verify that V
OUT
is 0V.
5. Set JP1, JP2, JP3, JP4 to 1. Slowly increase PS1 to
16V and verify that V
OUT
is off. Increase PS1 to 19V
and verify that V
OUT
is within the V
OUT
1.8V range listed
in the Performance Summary. Decrease PS1 to 4.0V.
Verify that V
OUT
is 0V.
6. Decrease PS1 to 0V and disconnect PS1 from V
IN
. Set
the current limit of PS1 to 25mA as described above.
7. Move the connection for PS1 from V
IN
to AC1. Slowly
increase PS1 voltage to 2.0V while monitoring the
input current. If the current remains less than 5mA,
increase PS1 to 19V. Verify voltage on V
OUT
is within
the V
OUT
1.8V range listed in the Performance Sum-
mary. Decrease PS1 to 0V, swap the AC1 connection
to AC2 and repeat the test. Decrease PS1 to 0V and
move the connection for PS1 from AC2 to V
IN
.
8. Set JP5 to 1, JP6 to 1, and JP7 to 1. Increase PS1 to
19V and set LOAD1 to 50mA. Verify voltage on V
OUT
is
within the V
OUT
5.0V range listed in the Performance
Summary. Verify that the output ripple voltage is be-
tween 40mV and 90mV. Set PS1 to 0V.
9. Set the current limit of PS2 to 60mA as described
above. Set JP1 to 0, JP2, JP3 and JP4 to 1, JP5–JP7
to 1 and JP8–JP10 to 0. Set JP12 to CHARGE. Increase
PS1 to 12V and set LOAD1 to 0mA. Connect PS2 to
the BAT_IN Terminals, then turn on PS2 and slowly
increase voltage to 1.0V while monitoring the input
current. If the current remains less than 15mA, increase
PS2 until V
M4
reads 2.7V. Verify that the current in
AM2 is approximately 660µA. Increase PS2 to 3.5V
and verify that V
M4
is approximately 3.45V.
10. Set JP8–JP10 to 1. Increase PS1 to 12V and set LOAD1
to 0mA. Set PS2 to 3.7V. Verify that the current in
AM2 is approximately 330µA. Increase PS2 to 4.3V
and verify that V
M4
is approximately 4.2V.
11. Set JP12 to FAST_CHRG. Set PS2 to 3.7V. Verify that
the current in AM2 is approximately 10mA. Set JP12
to CHARGE
12. Set the current limit of PS2 to 100mA as described
above. Set PS1 to 14V. Set JP1 to 1, JP2, JP3 and
JP4 to 0, JP5 to 0, JP6 and JP7 to 1. Set JP8 to 0. Set
PS2 to 3.2V. Set LOAD1 to 5mA. Remove PS1 lead
from the V
IN
turret. Verify voltage on V
OUT
is within
the V
OUT
3.0V range listed in Performance Summary.
Verify that PGV
OUT
is high and EH_ON is low. Decrease
PS2 to 2.6V and verify that V
OUT
is 0V. Increase PS2 to
3.8V. Press and release PB1. Verify the V
OUT
is 3.0V.
