Isolated Supply Peripheral Card
Features
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About
The J-Testr Low Voltage Isolated (LVI) Supply Peripheral card gives users all the power supply features they would expect from a modern bench supply all contained within the small footprint of a J-Testr peripheral card. Unlike some other supplies in the J-Testr peripheral card range the LVI supplies are fully isolated allowing them to be used for negative supplies and other applications where isolation is required. With the dual supplies also being fully isolated from each other they can also be configured in series to double the voltage range.
The LVI supply peripheral card can be powered from either a 24V or 48V J-Testr external supply allowing it to be used in conjunction with either the HV or the LV systems & peripheral cards for ultimate flexibly.
Precise variable voltage control and differential remote sense lines allow the user to eliminate significant voltage drop errors from power routings giving the user more accurate control over the voltage provided to the UUT.
Both supplies provide advanced power supply features such as programmable ramp rates and sequencing often only seen on more expensive bench top supplies. These advanced features allow users to simulate complex external supply profiles enabling testing of internal voltage monitoring chips to prove that the UUT will power up under the most extreme ‘power up’ cases.
The LVI supply peripheral card can be powered from either a 24V or 48V J-Testr external supply allowing it to be used in conjunction with either the HV or the LV systems & peripheral cards for ultimate flexibly.
Precise variable voltage control and differential remote sense lines allow the user to eliminate significant voltage drop errors from power routings giving the user more accurate control over the voltage provided to the UUT.
Both supplies provide advanced power supply features such as programmable ramp rates and sequencing often only seen on more expensive bench top supplies. These advanced features allow users to simulate complex external supply profiles enabling testing of internal voltage monitoring chips to prove that the UUT will power up under the most extreme ‘power up’ cases.
The supply cards have been designed with test in mind; hence protection features such as fully programmable independent Over Voltage (OV) and Over-Current (OC) protection are included. To fully protect the UUT the LVI supply peripheral card shuts down all J-Testr supplies1 extremely rapidly, greatly reducing the risk of damage to the UUT.
To expand the safety features, GPIO line(s) can be set up as external ‘fault’ signals which can be triggered using very simple comparator circuits (for OV or OC) on the interposer to trigger the same rapid ‘off’ safety mechanism. All fault signals are latched and can be read from registers so the user can easily track down the cause of an error and report it to the operator.
The LVI Supply Peripheral card includes accurate current and voltage measurement to enable the user to calculate the power drawn by the UUT for verification purposes. Differential voltage measurement is taken from supply remote sense points to eliminate connection voltage drops from the measurement.
Finally, as with all bus connected peripherals, the peripheral provides 8 general purpose User IOs which can be used to control and/or read custom circuitry on the interposer. The IOs can provide special hardware functions such as 16-bit PWM, UART, SPI, I2C, and GPSM (General Purpose Signal Monitor for measuring freq/duty/pulse-width etc.) that can be multiplexed to any of the IO pins.
To expand the safety features, GPIO line(s) can be set up as external ‘fault’ signals which can be triggered using very simple comparator circuits (for OV or OC) on the interposer to trigger the same rapid ‘off’ safety mechanism. All fault signals are latched and can be read from registers so the user can easily track down the cause of an error and report it to the operator.
The LVI Supply Peripheral card includes accurate current and voltage measurement to enable the user to calculate the power drawn by the UUT for verification purposes. Differential voltage measurement is taken from supply remote sense points to eliminate connection voltage drops from the measurement.
Finally, as with all bus connected peripherals, the peripheral provides 8 general purpose User IOs which can be used to control and/or read custom circuitry on the interposer. The IOs can provide special hardware functions such as 16-bit PWM, UART, SPI, I2C, and GPSM (General Purpose Signal Monitor for measuring freq/duty/pulse-width etc.) that can be multiplexed to any of the IO pins.