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IQ65033QMA10EKF-G Datasheet(PDF) 9 Page - SynQor Worldwide Headquarters |
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IQ65033QMA10EKF-G Datasheet(HTML) 9 Page - SynQor Worldwide Headquarters |
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9 / 15 page  Input: Outputs: Current: Package: 36-75 V 5.0 V/ 3.3 V 10 A Quarter-brick Product # IQ65033QMA10 Phone 1-888-567-9596 www.synqor.com Doc.# 005-IQ5033S Rev. G 05/04/09 Page 9 Technical Specification Input Enable: The ENABLE_A/B signals connect to VRTN_A/B on the backplane via the shortest pins in the zone 1 connector. They are the last pins to mate during board insertion, and the first to disconnect during board extraction. The ENABLE_A and ENABLE_B signals are diode-ORed together which lets either sig- nal enable the module. Whenever both ENABLE pins are open, the hot-swap switch is opened. This prevents -48V output power from being drawn though the EARLY pre-charge resistors. The ENABLE signals also control the management power. On board insertion, the management power remains off until at least one of ENABLE_A/B is connected. On board extraction, the management power is disabled at the end of the 100ms hold-up period, and remains off until ENABLE_A/B is reconnected. This prevents the IPMI controller from reading an invalid hardware address when a board is partially inserted. Management power flows through the EARLY pre-charge resistors for a maximum of 100ms, which provides a margin similar to the pre-charge event in terms of resistor safe-operating-area. EARLY Precharge Resistors: The EARLY_A/B signals connect to the longest pins in the zone 1 power connector, and therefore first to mate during board insertion. External resistors connected between these signals and VRTN_A/B allow the relatively small EMI filter capacitance to be pre-charged before the main power pins make contact. A 100W surge rated 2010 case size resistor is recommended (KOA SG73 series or equivalent). Hot Swap - Thermal Shutdown: To protect the unit from damage in an abnormal thermal environment, the hot-swap switch will be disabled when the thermal sensor temperature rises above the turn-off threshold. The switch will be automatically enabled again when the temperature goes below the turn-on threshold. The management power remains on during an over-temperature condition. The full featured version of the iQor reports the actual temperature through the I2C port. Hot Swap - Over-Current Protection: If the -48V output current rises above the current limit threshold, the hot-swap switch will be disabled, and will immediately enter another soft-start sequence. If an output short is detected, the hot-swap switch will be disabled and will enter a hiccup mode of operation with automatic restart. The full featured version of the iQor reports actual output current through the I2C port. Hot Swap - Transient Suppression: Input transient events can occur if there is a short on an adjacent board or backplane. The short builds up a large current in the wiring inductance, and when a fuse blows, the voltage behind the fuse spikes very quickly. This can cause a loss of redundancy since many other boards could be exposed to this spike. The iQor unit conditions the -48V output, providing for seam- less ride-through of input voltage transients. If the positive dV/ dt of the input voltage is too high, the hot-swap switch will be disabled and will immediately enter another soft-start sequence. This limits the dV/dt seen on the -48V output, which prevents the 12V payload power converter from having such a large glitch on its output that it shuts down. The -48V output hold-up function remains active throughout, in case the hot-swap switch is forced off for too long. Passive Transient Suppression: Each input feed has a dedi- cated internal bidirectional TVS zener diode, rated for a minimum clamp voltage of 77.8V at 1mA. A TVS diode short due to electri- cal overstress will not disable the iQor module: a fuse will open, and the module can continue to run from the other feed. External Hold-up Capacitor Charge: A current controlled DC-DC converter charges the external hold-up capacitor to a volt- age of 50V-95V, set by an external resistor. The charge voltage can range either above or below the input feed voltage. Constant current charging takes place whenever the hot-swap switch is enabled. Hold-up Capacitor Connect: When the hot-swap switch is enabled, 2 seconds are allocated to charge the hold-up capaci- tor. After this time, a comparator is armed, which connects the hold-up capacitor to the -48V output should the output ever drop below the given connect threshold. A current limit circuit protects against damage during a short circuit condition. A dV/dt limit cir- cuit regulates the hold-up connect switch turn-on speed. When the comparator is tripped, the hold-up connect switch remains closed for 100ms, is off for 2 seconds to allow the hold-up capacitor to recharge, and then is automatically rearmed (if the output voltage is above the given arm threshold). Hold-up Capacitor Discharge: Whenever the hot-swap switch is disabled, an internal resistor bank is connected across the hold-up capacitor. This is intended to reduce the voltage on the hold-up capacitor below 60V within 1 second. Management Power: An isolated management power converter delivers both 3.3V and a low power 5.0V relative to LOGIC_GND. Over-current protection operates in constant current with a hiccup mode if the output voltage drops too far. Output over-voltage circuitry is included with a redundant refer- ence and optocoupler. |
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