Data Sheet
SDL1000X Programmable DC Electronic Load
WWW.SIGLENT.COM
Program function
CR-LED ModeOCPT/OPPT Mode
Battery discharge function
In program (auto-test) mode, you can generate a sequence of tests
using different modes, mode parameters and durations. This function
is useful for automatically executing a set of tests on a device then
display whether the tests passed or failed. Test results are easily viewed
by pressing the up and down buttons. The load provides 8 nonvolatile
registers to save auto-test file for recall later. Each file contains 1-50
steps to set up. Auto-test function is especially useful in the designing
battery charging circuitry.
The SDL1000X includes a CR-LED mode speciîš¿cally for LED driver testing.
Basing on the traditional CR mode, CR-LED mode adds a diode break-
over voltage setting. When the input voltage is above this set value, the
DC load start to work. Thus, it can emulate the actual characteristics of
an LED.
Over-current protection (OCPT) mode prevents drawing too much
current from the DUT. After the input voltage reaches the Von point, the
DC load will start to draw a current from the source after a delay time.
The current value will increase by a certain step size at regular intervals.
Simultaneously, the DC load will compare the input voltage to the OCP
voltage:If it is lower, then the present current value will be compared to
see if it is in the current range you have set. Within the range, the OCP
test will evaluate Pass or Fail. If it is outside of the set range, the DC load
will to increase drawing current and compare the voltage again.
Overpower-protection (OPPT) mode: When the input voltage has reached
the Von point, the load will draw power after a delay time. The power
value will increase by a step size at regular intervals. Simultaneously, the
DC load will judge whether the input voltage is lower than OPP voltage
you have set, if it is, then the present current value will be compared
to see if it is in the current range you have set. Within the range, the
OPP test will Pass or Fail. If it is outside of the set power, the load will
continue to increase the power draw within the cut-off current range and
compare OPP voltage with the input.
The SDL1000X can also provide insight into battery performance by
analyzing the discharge characteristics of the DUT. The SDL features
three stop conditions for the discharge test: Voltage, capacity or time.
The discharge process is immediately terminated if the stop conditions
are met. This provides more control over the test termination and an
extra layer of safety during critical tests. Throughout the test process
the battery voltage, discharge current, discharge time and discharged
capability is displayed clearly on the LCD panel.