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Programmable Dual-Range DC Power Supplies

9170 & 9180 series

4

Hot-swap mode*

This mode is ideal for testing LED panels in a mass production environment. Throughput is significantly increased by eliminating the need to turn the power supply on

and off between each test, while sufficiently minimizing the time interval of the surge current to protect the UUT. With the addition of a handler interface, each UUT

can be “hot-swapped” to automatically connect to the test station interface.

LED mode

With LED mode active, inrush current will be eliminated or minimized to protect the UUT.

Low current mode*

This unique function enables the power supply to

minimize the voltage rise time in a controlled

manner. This mode is used when operating at a

low current (< 1 A) and quick transitions from a

high-to-low or low-to-high voltage are needed.

To address the growing LED market, the 9170/9180 series design incorporates special LED test modes for efficient and safe electrical tests of LED panels. Powering

LEDs with conventional power supplies will potentially cause permanent damage to the UUT or limit its lifespan due to excessive inrush current at power up and the

non-linear characteristics of the LED’s I-V curve. These power supplies feature three distinct operating modes suitable for LED testing in a manufacturing or R&D

environment and other special applications requiring a controlled rise time at power up without generating any inrush current.

Example LED test setup

Low current mode OFF

Low current mode ON

Current flow during power up with LED mode enabled

Voltage rise time with and without low current mode enabled

Inrush current

Output ON

20 ms

5 ms

Output ON

Test modes for LED and other special applications

* Hot-swap mode (hardware option) and low current

mode for high voltage models 9184 and 9185 only.

LED mode OFF

LED mode ON