• Hardware CR-LED mode that reproduces real LED-string output, removing the voltage/current jitter of MCU-based CR modes and widening usable frequency for PWM dimming tests.
• Adjustable-frequency, adjustable-duty-cycle PWM dimming port, 20 Hz to 2 kHz; can also output an external 20 Hz to 2 kHz PWM pulse.
• I-pp/I-max measurement to capture current ripple and start-up surge current of LED constant-current drivers.
• Operating modes: CR-LED, CC, CV+CC, CR, CW.
• Dynamic CC mode up to 20 kHz; voltage and current measurement up to 50 kHz.
• Voltage resolution 10 mV, current resolution 0.01 mA (10 µA).
• Automatic test function flags results outside set high/low limits, for production use.
• Range 500 V / 15 A / 300 W in a half-rack 2U chassis; built-in USB and RS232.

• LED driver power testing and validation.
• PWM dimming verification of LED drivers (20 Hz to 2 kHz).
• Current ripple measurement of LED constant-current drivers (I-pp).
• Start-up surge (inrush) current testing of LED drivers (I-max).
• LED lighting development and production-line pass/fail testing.

• Type: multi-channel, modular programmable DC electronic load
• Channel Scalability: Up to 8 channels per mainframe, extendable to 16 channels
• Voltage Range: 80 V and 500 V classes
• Module Count: 8 (single- and dual-channel); module size 573 x 183 x 85 mm
• Dynamic Mode: Up to 25 kHz, adjustable current rise/fall slope
• Measurement Speed: Up to 50 kHz voltage and current
• Measurement Resolution: 0.1 mV / 0.1 mA
• Functions: List mode, automatic test, synchronous multi-module control, self-diagnosis
• Protection: OVP, OCP, OPP, OTP, anti-reverse
• Mainframes: IT8701P and IT8702P (each including three interfaces) plus IT8703P four-module expansion unit
• Communication Interfaces: built-in Ethernet, USB, RS232; SCPI protocol

Module list (verified, voltage / current / power):

• IT8731: 80 V / 40 A / 200 W.
• IT8732: 80 V / 60 A / 400 W.
• IT8732B: 500 V / 20 A / 300 W.
• IT8733: 80 V / 120 A / 600 W.
• IT8733B: 500 V / 30 A / 500 W.
• IT8722: 80 V / 20 A / 250 W x 2CH (dual-channel, dynamic power distribution, total 300 W).
• IT8722B: 500 V / 15 A / 250 W x 2CH (dual-channel).
• IT8723: 80 V / 45 A / 300 W x 2CH (dual-channel).

The ITECH IT8912E is a high-accuracy DC electronic load built specifically as an LED load simulator, for engineers who develop and qualify LED drivers. Its defining feature is a CR-LED mode implemented in a pure hardware circuit rather than an MCU software loop. By setting the LED driver’s operating voltage, current, and coefficient, the load reproduces the real output behavior of an LED string. Because the control is hardware-based, it removes the voltage and current jitter that general-purpose loads show in CR mode, widens the usable frequency, and makes realistic PWM dimming tests possible.

An adjustable-frequency, adjustable-duty-cycle PWM port (20 Hz to 2 kHz) drives dimming tests, and the IT8912E can also output an external 20 Hz to 2 kHz PWM pulse to coordinate the test. An I-pp/I-max measurement function captures current ripple and the start-up surge current of an LED constant-current source, two failure-relevant parameters that are hard to see on a standard load. Voltage and current measurement runs to 50 kHz, dynamic CC mode reaches 20 kHz, and an automatic test function flags results that fall outside set high and low limits.

The IT8912E provides CR-LED, CC, CV+CC, CR, and CW modes over a 500 V, 15 A, 300 W range, with built-in USB and RS232. It is applied to LED driver power and dimming testing.