background image

PAH300

350S24

-SERIES 

 

TDK-Lambda 

14

 

Before concluding power module damage

 

  Verify  following  items  before  concluding  power 
module damage.   
 
1) No output voltage 

Is specified input voltage applied? 

 

Are  the  ON/OFF  control  terminal  (CNT),  remote 
sensing  terminal  (+S,  -S),  output  voltage  trimming 
terminal (TRM) correctly connected? 

 

For cases where output voltage adjustment is used, is 
the  resistor  or  variable  resistor  setting,  connections 
correctly done? 

 

Are there no abnormalities in the output load used? 

 

Is  the  baseplate  temperature  within  the  specified 
temperature range? 

 
2) Output voltage is high 

 

Are  the  remote  sensing  terminals  (+S,  -S)  correctly 
connected? 

 

Is the measurement done at the sensing points?   

 

For cases where output voltage adjustment is used, is 
the  resistor  or  volume  setting,  connections  correctly 
done? 

 
3) Output voltage is low 

Is specified input voltage applied? 

 

Are  the  remote  sensing  terminals  (+S,  -S)  correctly 
connected? 

 

Is the measurement done at the sensing points? 

 

For cases where output voltage adjustment is used, is 
the  resistor  or  variable  resistor  setting,  connections 
correctly done? 

 

Are there no abnormalities in the output load used? 

 
4) Load regulation and line regulation is large 

Is specified input voltage applied? 

 

Are  the  input  terminals  and  the  output  terminals 
firmly connected? 

Is the measurement done at the sensing points? 

Is the input or output wire too thin? 

 
5) Output ripple voltage is large 

 

Is the measuring method used the same or equivalent 
with the specified method in the Application Notes? 

Is the input ripple voltage value within the specified 

value? 

 

Summary of Contents for 350S24 Series

Page 1: ...ionon electronic equipment For input terminalsof24 V inputmodels apply avoltagefromaprimary sourcewith reinforced ordouble insulation Output voltage of this product is considered to have hazardous ene...

Page 2: ...TP 9 Remote Sensing S S terminal 10 ON OFF Control CNT terminal 11 Parallel Operation 12 Series Operation 13 Operating Ambient Temperature 14 Operating Ambient Humidity 15 Storage Ambient Temperature...

Page 3: ...lter Baseplate CASE Switching Frequency fixed 330kHz typ Sequence Time Chart For Standard Model with Negative logic for ON OFF control Input Voltage Output Voltage 1 ON OFF Control L H 0V Vin 0V Vout...

Page 4: ...rminal CASE Baseplate Terminal S Remote Sensing Terminal CNT ON OFF Control Terminal TRM Output Voltage Trimming Terminal Vin Input Terminal S Remote Sensing Terminal V Output Terminal Baseplate can b...

Page 5: ...connect electrolytic capacitor or ceramic capacitor between Vin and Vin terminals Furthermore use electrolytic capacitor with small ESR value Especially take note that during line turn off at low amb...

Page 6: ...y that ripple current does not exceed allowable ripple current before use C5 0 1 F To reduce spike noise voltage at the output connect a ceramic capacitor between V and V within 50mm distance from the...

Page 7: ...ut and output wiring method as well as peripheral circuits When selecting input filter be sure to verify actual EMI characteristics CE and RE before finalizing the filter Refer to PAH300 350S24 Evalua...

Page 8: ...output voltage higher 2 1 Allowable maximum output current maximum output power output voltage reduce maximum output current in specification 2 2 Connect an external resistor Radj up between TRM term...

Page 9: ...note that power module might be damaged continuing output short circuit or over load conditions depending on thermal conditions 7 OverVoltageProtection OVP This power module has built in OVP function...

Page 10: ...l should be shorted to Vin terminal 2 When ON OFF control function is not used for the P option and PT option CNT terminal should be opened 3 When using long wiring for prevention of noise attach a 0...

Page 11: ...gh care when storing the power module because rust which causes poor solderability would form in each terminal when stored in high temperature high humidity environment 17 Cooling Method Operating tem...

Page 12: ...g a resistor etc DC Isolation Tester Vin CASE CNT Vin V S TRM S V Over 100M at 500VDC Fig 20 1 Isolation Test 21 Vibration Vibration of power module is defined in case of mounting on printed circuit b...

Page 13: ...m Land diameter 3 0 mm Output terminals 2 0 mm Hole diameter 2 5 mm Land diameter 4 5 mm Mounting Holes FG Hole diameter 3 5 mm Land diameter 5 5 mm For position of the holes see outline drawing of th...

Page 14: ...l 3 5 Non threaded hole 2 2 Standard model and Poption model M3 Threaded hole 3 Regarding Vibration The vibration specification of the module is determined assuming that only the power module is mount...

Page 15: ...ts For cases where output voltage adjustment is used is the resistor or volume setting connections correctly done 3 Output voltage is low Is specified input voltage applied Are the remote sensing term...

Reviews: