TDK Half Brick-iHG specifications Operating Information

Data Sheet: Xeta iHG48070A033V, 3.3V/70A Output Half Brick Series

Operating Information:

Over-Current-Protection (OCP): The power modules have current limit protection to protectthemoduleduringoutputoverloadand short circuit conditions. During overload conditions, the power modules may protect themselvesbyenteringa hiccupcurrentlimit mode.Themoduleswilloperatenormallyonce the output current returns to the specified operating range. A latched overcurrent protectionoptionisalsoavailable.Consultthe TDKInnovetatechnicalsupportfordetails.

Output Over-Voltage-Protection (OVP): The power modules have a control circuit, independent of the main control loop, that reducestheriskofovervoltageappearingat theoutputofthepowermoduleduringafault condition. If there is a fault in the voltage regulation loop, the over voltage protection circuitrywillcausethepowermoduletoshut down.Themodulewilltrytoautorestartin1

+/ 0.2 sec time period. An optional feature with latched OVP protection can also be offered. Consult the TDK Innoveta technical supportfordetails.

Thermal Protection: When the power modules exceed the maximum operating temperature, the modules may turnoff to safeguard the power unit against thermal damage. Themodule will auto restart as the unit is cooled below the over temperature threshold. A latched overtemperature protectionoptionisalsoavailable.Consultthe TDKInnovetatechnicalsupportfordetails.

Thestandardon/offlogicispositivelogic.The

powermodulewillturnonifterminal2isleft

openandwillbeoffifterminal2isconnected to terminal 4. An optional negative logic is available. The power module will turn on if terminal 2 is connected to terminal 4, and it willbeoffifterminal2isleftopen.

Vin (+)

On/ Off

Vin(-)

An On/Off Control Circuit

Output Voltage Adjustment: The output voltageofthepowermodulemaybeadjusted by using an external resistor connected between the Vout trim terminal (pin 7) and either the Sense(+) or Sense() terminal. If the output voltage adjustment feature is not used,pin7shouldbeleftopen. Careshould be taken to avoid injecting noise into the power module’s trim pin. A small 0.01uF capacitorbetweenthepowermodule’strimpin andSense()pinmayhelptoavoidthis.

Remote On/Off: The power modules have aninternalremoteon/offcircuit.Theusermust supplyanopencollectororcompatibleswitch betweentheVin()pinandtheon/off

pin. The maximum voltage generated by the power module at the on/off terminal is 15V. The maximum allowable leakage current of the switch is 50uA. The switch must be capableofmaintainingalowsignalVon/off< 0.8Vwhilesinking400uA.

Vout(+)

Sense(+)

Trim

Rdown

Sense(-)

Vout(-)

Circuit to decrease output voltage

©2008TDKInnovetaInc.	℡(877)498 0099
iHGDatasheet20080515Revision1.1	13/16