IT8511A+ Programmable DC Electronic Load
Manufacturers
ITECH
Other Recommendations
Programmable DC Electronic Load with High-Density Design, 0.1mV/0.1mA Resolution, Supports CV/CC/CR/CP Modes, 10kHz Dynamic Testing & Automation for Power Supplies/LED Drivers/Batteries
🎯0.1mV/0.1mA
Accurately captures minute current/voltage changes (Source: Input description)
⚡10kHz
Simulates rapid load changes for transient testing (Source: Input description)
🔌Multi-Interface
USB/RS232/RS485 + SCPI protocol for automation (Source: Input description)
| Core Parameter | Specification | Application Value |
|---|---|---|
| Operating Modes | Constant Voltage (CV), Current (CC), Resistance (CR), Power (CP) | Simulates diverse load characteristics for comprehensive testing |
| Measurement & Dynamics | 0.1mV/0.1mA resolution, 10kHz dynamic mode, remote sensing | Measures micro-ripples (e.g., 1mV in LED drivers), simulates motor startup surges |
| Intelligence & Expansion | 100 memory presets, SCPI protocol, over-current/power protection | 50% faster production changeover, automated scripting, DUT protection |
Core Application Scenarios
LED Driver Testing — CC mode verifies constant current accuracy (±1%), 0.1mA resolution detects fluctuations (e.g., 350mA±0.3mA)
Switching Power Supply Transient Testing — 10kHz dynamic mode simulates 1A→5A load steps (<100μs rise time), measures voltage overshoot (≤5%) and recovery time (<200μs)
Lithium Battery Capacity Verification — CP mode discharges at 5W constant power, calculates capacity from 3.7V to 2.5V discharge time
Technical Deep Dive
Precision Architecture
Features "High-Precision Measurement + High-Speed Control + Smart Interface Integration": 32-bit MCU+FPGA enables <50μs mode switching (Source: Input description). 24-bit ADC with low-noise amplification achieves 0.1mV/0.1mA resolution (<0.05% error). Remote sensing compensates for lead voltage drop. USB/RS232/RS485 interfaces support SCPI automation. 100 non-volatile memory presets store test configurations.
| Technical Dimension | IT8500+ Series | Standard DC Load | Advantage |
|---|---|---|---|
| Measurement Accuracy | 0.1mV/0.1mA resolution, remote sensing | ≥1mV/1mA resolution, no remote sensing | Reduces LED driver current error from 2mA to 0.03mA (99.8% yield) |
| Dynamic Performance | 10kHz mode, <50μs switching time | ≤1kHz response, >500μs switching | Captures 200μs voltage transients missed by standard loads |
Switching Power Supply Test Workflow
Connection: Connect load to 5V/10A power supply output, enable remote sensing, interface via USB to PC running LabVIEW
Configuration:
- Dynamic CC mode: 1A→5A switching at 10kHz (50% duty)
- Set protection: Over-power 50W, over-current 12A
- Configure 1MHz sampling for transient captureTesting:
- Measure voltage overshoot: 5.0V→5.2V (4%<5% pass)
- Verify recovery time: 150μs (<200μs pass)
- Record steady-state ripple: 12mVpp (<20mV pass)Optimization: If overshoot=5.3V, adjust feedback compensation capacitor (10nF→22nF), retest to verify 5.1V result
Usage Notes
1. Enable remote sensing for low-current (<100mA) or low-voltage (<1V) measurements to compensate lead voltage drop
2. Limit dynamic slew rate to ≤10A/μs to prevent EMI interference
3. Use SCPI commands (*RCL 1) to recall presets for different product types
