HV300LG-G, HV301LG, HV310

The HV301LG is designed as hot swap controller which provide control of power supply connection during insertion of cards or modules into live backplanes. They may be used in systems where active control is implemented in the negative lead of supplies ranging from ±10V to ±90V.

It has thirteen features. (1)±10V to ±90V operation. (2)Built-in "normally on" turn-on clamp eliminates components. (3)UV/OV lock out & power-on-reset for debouncing. (4)Sense resistor program ground circuit breaker. (5)Programmable circuit breaker holdoff. (6)Inrush control using either: i) servo or ii) feedback cap. (7)Feedback to ramp pin means no gate clamp needed. (8)Application solution for input voltage step (diode "ORing"). (9)Programmable auto-retry (tens of seconds if desired). (10)Auto-retry or latched operation. (11)Enable through open drain interface to UV or OV. (12)Low power, <0.6mA PWRGD flag operation, <0.4mA sleep mode. (13)Small SOIC-8 package. That are all the main features.

Some absolute maximum ratings have been concluded into several points as follow. (1)Its VEE reference to VDD pin would be from +0.3V to -100V. (2)Its VPWRGD referenced to VEE voltage would be from -0.3V to +100V. (3)Its VUV and VOV referenced to VEE voltage would be from -0.3V to +12V. (4)Its operating ambient temperature would be from -40°C to +85°C. (5)Its operating junction temperature would be from -40°C to +125°C. (6)Its storage temperature range would be from -65°C to +150°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics are concluded as follow. (1)Its supply voltage would be min -90V and max -10V. (2)Its supply current would be typ 600uA and max 700uA. (3)Its sleep mode supply current would be typ 400uA and max 450uA. (4)Its current limit threshold voltage would be min 40mV and typ 50mV and max 60mV. (5)Its circuit breaker threshold voltage would be min 80mV and typ 100mV and max 120mV. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!

The Supertex HV300 (and HV310), Hotswap Controller, Negative Supply control power supply connection during insertion of cards or modules into live backplanes. They may be used in traditional 'negative 48V' powered systems or for higher voltage busses up to negative 90V.

Operation during the initial power up prevents turn-on glitches, and after complete charging of load capacitors (typically found in filters at the input of DC-DC converters) the HV300 (and HV310) issues a power good signal. This signal is typically sed to enable the DC-DC converter.

The only difference between the HV300 and the HV310 is the polarity of the PWRGD signal line to accommodate different DC-DC converter models. Once PWRGD signal has been established the device sleeps in a low power state, important for large systems with many individual hotswap cards or modules.

An external power MOSFET is required as the pass element, plus a ramp capacitor, and resistors to establish current limiting and over and under voltage lockouts. There is no need for additional external snubber components.

Features are programmable over voltage and under voltage detection of the input voltage which locks out the load connection if the bus (input) voltage is out of range. An internal voltage regulator creates a stable reference, and maintains accurate gate drive voltage. The unique control loop scheme provides full current control and limiting during start up.