Transcript 投影片 1 - LEAP ELECTRONIC 力浦電子

~ Mini Programmable DC Power Supply ~
mPP Series :
Precision
Protection
PC-Remote
Power Scope
Our Feature
Dimension !
Only 30% volume of traditional power supply !
By turning the rotary encoder, we can easily get fine-turned
voltage level, and clearly find out the critical voltage of the
component and the circuit.
When the DUT is tested from constant voltage (C.V) from constant
current (C.C), the rotary encoder automatically changes to fine
tune of output current.
Provide the constant power output from 1.5V to 5V.
Our Feature
Store memory:
100 sets store memory for setting OCP, OVP, V.Set
Limit, voltage and current.
V.Set Limit function:
Offer the limit of the maximum voltage setting to
protect user's low-voltage DUT.
Keypad/Knob Lock function:
Able to use lock function to keep the voltage and
current setting and will keep the setting even when
the mPP power on/off again.
Reliability Test
Use Power Scope to record and display the curves of
current consumption & voltage variation.
It can track and record the curves
the load variation for a long time,
displaying the curves of current
consumption and voltage variation
for the purpose of analysis.
․
With the programmable function, the
software provides the variation of
output voltage and current for the
observation of the current
consumption at each voltage level.
․
Under the condition of long time
DUT power fluctuation, it allows the
user to judge the stability of the
components, and to find out the
potential trouble of the product in
real time.
Reliability Test
Programmable output
(Time working and voltage variation attack)
Programmable function.
Besides to set the output voltage and maintaining time, we
also could set the maximum/minimum current of the load.
․
In accord with the Power Scope, we could record the curve
of current consumption & the voltage variation for analysis.
․
We could accord the attrition from the power to determine
the stability & the normal of the product.
The difference of C.C & O.C.P
The general power supply device has only two working mode
-C.V./C.C., when entering into C.C. mode, the power supply
becomes the constant current power source to provide the
DUT with constant current, which eventually the DUT is
burn out.
When IL under C.C value, EL will maintain with the constant C.V.
value, and this moment, the power supply is under C.V mode.
When IL increase to C.C value, EL will start to decrease until
IL maintain with the constant C.C value, and this moment, the
power supply is under C.C mode.
(And the power supply is still provide the current to the
load.)
Relatively, the O.C.P function is easy and suitable for the digital
circuit. User could set C.V and C.C first, and then use the function
key to start the O.C.P function and set the protection current value.
(It’s in need to be under C.C value.)
If IL over O.V.P setting, the power supply will shut off the current
output and enter into OUT OFF mode, and warning is given.
O.V.P
When the DUT is for resistance load (as rechargeable Battery
or sensor), user need to set the constant current first, and set the
working voltage, connect the output to the DUT.
․ In the beginning, the resistance of the DUT is low, IL is fixed at
C.C value, and EL will under less than C.V.
․ At this moment, user could use the function key to start O.V.P and
key in the voltage value. (It's in need to less than C.V)
․ As the resistance increase gradually, and IL with no change, EL
will also increase.
․ When EL increase to O.V.P value, the power supply will shut off
the current output and enter into OUT OFF mode, and warning is
given.
Series/Parallel connection of power output
Series connection output #1 (for higher output voltage)
You can get higher voltage by series connection of two or more outputs, and please
take notice :
The voltage of series connection is the accumulative value of each voltage, the current is the
minimum value of all them.
ex : E1=30V/I1=3A ; E2=30V/I2=2A -> EL =60V(30+30V),
If IL more than 2A will cause E2 be decreased, and EL will decrease to close to E1(30V)
Series connection output #2 (for positive/negative output)
By series connection of two power outputs under positive/negative and common mode, you can get
positive and negative outputs.
The voltage of positive output is E1 ; and the voltage of negative output is E2.
Parallel connection output (for higher current)
You can get higher current by parallel connection of two or more power outputs, and please take
notice :
All of the output voltage of parallel connection must be the same, and the current will be accumulative.
ex : E1=5V/I1=3A ; E2=5.5V/I2=2A --> EL=5.5V, when the load increase to 2A,
if E2 change from C.V to C.C, E2 will be decreased to 5V(E1),
and then IL will be : I1+I2 =3A+2A=5A
It’s your best choice !