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SXA10 Series | 15W DC-DC ATC210 Dual Series | 210 W DC-DC Intermediate Bus Converters 4 Signal Electrical Interface Contd. File Name: atc210.pdf Rev: 16 Aug 2006 Characteristic - Signal Name Symbol Min Typ Max Units Notes and Conditions Interrupt (output only) pin 18 Output, which goes active low when any of the measured parameters goes outside its limits. See Application Note 205 for further detail High level output voltage Voh 2.90 3.10 3.30 V Interrupt is not active Low level output voltage Vol 0.1 V Interrupt is active High level output current Ioh 5.0 mA Output source current Low level sink current Iol 5.0 mA Output sink current I2C Bus (input and output) SDA and SCL referenced to pins 20 and 22 secondary side 3.3 V return Low level sink current Iol 5.0 mA provide the communication path with the ‘host’ system. See Application Note 205 for further details Clock frequency I2Cfreq 100 kHz This value is fixed Address A0, A1, A2 Forms part of the I2C binary pins 21, 19 and 17 (input only) address. These are hardwired to logic ‘1’ via 10 k pull-ups, but can be configured to logic ‘0’ by connecting to 3.3 V output return via zero Ω link(s). See Application Note 205 for further details Enable A & B (input only) These two inputs effectively connect to their respective returns once the Zone1 connector mates with the Zone1 socket on the backplane. Both Enables must mate to start up the unit Holdup Characteristics Characteristic Symbol Min Typ Max Units Notes and Conditions Hold up capacitance Choldup Chold_min 8,000 µF Chold_min depends on load and requirement hold up requirement on customer system. See Application Note 205 Clamp voltage Vcl 41.0 41.5 V Voltage on hold up capacitors (pin 12 wrt pin 9) when input is 43 V and 210 W load Clamp voltage OVP Vcl_ovp 48.0 V If the clamp voltage exceeds Vcl_ovp, the unit trips. Reset is achieved by cycling the input power |
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