Archive for the ‘DC Loads’ Category

Product Focus: 63472 High Slew Rate DC Electronic Load

Oct 20th, 11 / 0 Comments

High Slew Rate DC Electronic Load

  • Designed for VRM’s, embedded VRD’s and Power Pod testing
  • Static Loading – Power rating: 200W / Voltage range: 0-2V / Current range: 150A
  • Dynamic Loading – Current range: 150A
  • Slew rate: Up to 1000A/µs
  • Dynamic Freq: Up to 1MHz

As a result of the exploding increase in CPU complexity according to Moore’s Law, all modern processors require a low voltage with high instantaneous current power source. Voltage Regulator Modules, along with embedded solutions, are the only way to correctly supply these currents. A need to simulate this low voltage, high current with fast di/dt loading has become more important than ever. Every main board design using a VRM, Intel ItaniumTM power pod or an embedded regulator (VRD) will need processor voltage supply performance qualification.

Integrating Intel’s latest high di/dt test technology with years of experience in the design and manufacture of highly accurate, precision DC load and measurement instrumentation, the Chroma 63472 electronic load is your total solution for qualifying all main board Intel® processor power performance requirements.

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DC Loads

Product Focus: 63200 Series High Power DC Electronic Load

Oct 14th, 11 / 0 Comments

High Power DC Electronic Load

  • Power Rating: 2600W, 5200W, 6500W, 10400W, 14500W, 15600W
  • Voltage range : 0 ~ 80V / 0 ~ 500V
  • Current range : Up to 1000A
  • CC, CR, CV, CP load modes
  • Master/Slave paralleling control mode, allow synchronous load control under static and dynamic loading mode (Up to 93.6kW)

The Chroma 63200 series Electronic DC Loads are designed to test DC Power Supply, power electronic devices, automative battery and components testing. The high power ratings, parallel and synchronization capabilities make them the ideal tool for testing high power UUT’s such as SMR’s, UPS’s, batteries, and fuel cells.

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DC Loads

Battery Charge/Discharge Test Solutions

Oct 7th, 11 / 0 Comments

DC LoadsSatisfy your Battery Test Requirements such as charge rate, discharge rate, state of charge (SOC), and state of health (SOH), and depth of discharge (DoD) with accuracy in measuring voltage, current, temperature and power both statically and dynamically.

DC Impedance Measurement For Battery Cell

The battery pack for electric vehicles requires the battery cells be paralleled for large current use. An important parameter is the impedance consistency of the battery cell since battery life may be affected if the impedance is not consistent. The DC impedance test solution offered by Chroma sets the discharge current change (ΔI) and measures the voltage change (ΔV), and then calculates the battery’s internal resistance using ΔV/ΔI as shown in the figure below.

Applications, Battery Testing, DC Loads, SoftPanels

Product Focus: LED Power Driver Automated Test System

Oct 6th, 11 / 0 Comments

LED Power Driver ATSThe Chroma 8491 Automated Test System is equipped with optimized standard test items for LED driver testing (lighting & TV backlight). The user is only required to define the test conditions and specifications for the standard test items to perform the test.

The optimized test items cover 6 types of power supply test requirements. “Output Performances” verifies the output characteristics of the UUT. “Input Characteristics” check the UUT input parameters. “Regulations” test the stability of UUT under varying line-in and loading changes. “Timing & Transient” test the timing and transient states during protection. “Protection Tests” trigger and test the protection circuit, the “Special Tests” provide means to test the most sophisticated UUT’s when unique test routines are needed.

ATS/ATE, DC Loads, LED/Lighting

How to Set Your DC Load Modules for 221Amps at 1V in CR Mode

Sep 13th, 11 / 0 Comments

Follow these four steps when setting your Chroma 63640-80-80 DC Load modules for 221Amps at 1V in Constant Resistance Mode:

DC Electronic LoadsStep 1: Set the ALL_RUN Feature to ON it is located in the SETUP menu to access the SETUP menu press the ADVA and ENTER keys simultaneously. This must be set on each of your loads.

Step 2: Set the Range to Low (L) by pressing the RANGE key until the (L) indicator is lit. This must be done on each load.

Step 3: Set the CR Mode by pressing the MODE key until a small CR appears on the Load Display. This must be done on each load.

Step 4: Set the Resistance on loads 1 thru 4 to 0.02Ω then on Load 5 set the ressitance to 0.05Ω.

When paralleling 5 of the 63640-80-80 Loads you will need to set each load individually. You can not use Master/Slave Mode, you will be limited to set the resistor value to 0.01Ω and can’t set the 0.045Ω needed to achieve 221Amps at 1Vdc. Since you want 221Amps you can set (4) of the loads to CRL and 0.02Ω and set one load to 0.05Ω. To synchronize the loads to turn on and off together you can go to SETUP and select ALL_RUN and set it to ON. You will need to set this on each load module. This will give you a total current of approx. 220Amps at 1Vdc. The Loads you have can only be set to 0.01Ω minimum in Constant Resistance Mode Low Range (CRL).

DC Loads