The **NHV6-1-R** is a high-performance, programmable DC electronic load module manufactured by **TDK-Lambda** (specifically within the SWS or NHV series context, often used in ATE systems). It is designed to simulate electrical loads for testing power supplies, batteries, and DC-DC converters. --- ### 1. Key Technical Specifications The "NHV" series is known for high density and precision. Below are the typical specifications for the NHV6-1-R module: | Parameter | Specification | | :--- | :--- | | **Max Power** | 600W | | **Max Voltage** | 150V | | **Max Current** | 120A | | **Channels** | Single Channel | | **Operation Modes** | CC (Constant Current), CV (Constant Voltage), CP (Constant Power), CR (Constant Resistance) | | **Interface** | Typically controlled via a Mainframe (e.g., GPIB, RS-232, or LAN) | --- ### 2. Core Electronic Components & Architecture The internal circuitry of the NHV6-1-R consists of several critical stages to ensure stable power dissipation: #### A. Power Dissipation Stage (The "Load") * **MOSFET Array:** The heart of the unit. It uses a bank of power MOSFETs operating in their **linear region** (rather than switching mode) to dissipate energy as heat. * **Heat Sinks & Cooling:** Because 600W of power is converted entirely into heat, the module features high-efficiency copper/aluminum heat sinks and variable-speed fans controlled by thermal sensors. #### B. Control & Feedback Loop * **Error Amplifiers:** High-speed analog circuits that compare the programmed setpoint with the actual measured current/voltage. * **Shunt Resistors:** High-precision, low-drift resistors used to measure the current flowing through the load with extreme accuracy. #### C. Protection Circuitry * **OPP (Over Power Protection):** Limits the load if it exceeds 600W. * **OVP/OCP:** Over Voltage and Over Current protection to prevent damage to the module or the Device Under Test (DUT). * **OTP (Over Temperature Protection):** Shuts down the module if the MOSFET junction temperature exceeds safe limits. --- ### 3. Functional Features The "R" in the suffix often denotes specific revisions or "Remote" sensing capabilities. 1. **Remote Sensing:** Allows the load to compensate for voltage drops in the connection leads by sensing the voltage directly at the DUT terminals. 2. **Dynamic Loading:** The electronic parts are capable of high-speed switching to simulate transient loads (e.g., a CPU jumping from idle to full load). 3. **Programmable Slew Rate:** Users can control how fast the current rises or falls (A/µs) to prevent inductive voltage spikes. --- ### 4. Typical Applications * **Power Supply Burn-in:** Testing the longevity of AC-DC converters. * **Battery Discharge Testing:** Mapping discharge curves to determine capacity. * **Solar Panel Testing:** Simulating different load conditions to find the Maximum Power Point (MPP).