Related Manuals for TDK-Lambda CM4
Summary of Contents for TDK-Lambda CM4
- Page 1 AC/DC Modular Power Supply Series APPLICATION NOTES CM4 App Note 260424 issue 2.1.docx Document No.260424 Page 1 of 29...
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Page 2: Table Of Contents
Advanced Output Module Features 10. Series Connected Outputs Parallel Connected Outputs 12. Mechanical Dimensions and Mounting Connector details 14. EMC Compliance 15. Reliability 16. Output Modules Accessories CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 2 of 29... -
Page 3: Theory Of Operation
The output of the PFC stage charges the hold-up electrolytic capacitors which store enough energy to allow the CM4 configured product to continue operating during minor line disturbances. Long lifetime and high temperature capacitors are used which ensures extended lifetime and product reliability. -
Page 4: Input Module Operation
Default. Unit will start into NORMAL mode Open Closed STANDBY <1W power consumption Closed Open STANDBY Unit will start into STANDBY mode. <1W power consumption Closed Closed NORMAL J2 LOCATION J11 LOCATION CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 4 of 29... -
Page 5: Input Module Protection
No Load Power/Standby Power Consumption The no-load power consumption of the CM4 series power supply is extremely low when compared to similar configurable power supplies. With the output modules enabled the unit typically only requires less than 15W with no output load. To reduce the no-load power further the outputs can be disabled using the inhibit pins. -
Page 6: Efficiency Performance
The efficiency of the configured CM4 product is dependent on parameters such as input line voltage, load level and on the combination of output modules. The plots below show typical efficiencies of a CM4 product fitted with all modules S1, S2, S3 or S4. The plots cover the full load and line voltage range. -
Page 7: Power Ratings
5. Power Ratings CM4 series products must always be operated within stated operating limits. Equipment manufacturers and other users must take the appropriate de-rating into account when specifying a unit for the intended application. If in doubt, contact TDK-Lambda for assistance. -
Page 8: System Cooling
Notes Standard TDK-Lambda heatsinks type 1 and type 2 used. Type 1 used for mounting orientations A, B, E and F. Type 2 used for mounting orientations A, B, C and D. CM4 App Note 260424 issue 2.1.docx Document No. 260424... - Page 9 Standard TDK-Lambda heatsinks type 1 and type 2 used. Type 1 used for airflow direction X. Type 2 used for airflow direction Y. The ratings provided above are for guidance only and all CM4 configured solutions must be evaluated in the end application to ensure the conditions set out in the power ratings section are met.
- Page 10 Specifying the CM4 product for convection or forced air cooling To specify a CM4 series product for an end application, the required output power, minimum input line voltage, maximum ambient, mounting orientation and air flow rate (if applicable) should be determined. Check the requirements against the closest characteristic plot from the tables above to ensure ratings can be achieved.
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Page 11: Signalling
Bias Supply (+5V [Power]) The CM4 series has one isolated bias supply located on the transformer module (J3) beside slot 4. The output side bias supply generates 5V and is rated up to 1A. The supply is available whenever the AC mains voltage is connected and the input module is operating correctly. A shutdown through the standby control on J2 or any of the following abnormal conditions will disable the 5V bias supply: ... - Page 12 Vs Internal Temperature V = 0.4 + 0.0195*T The sensor will accurately measure temperatures in the range -10⁰C to +125⁰C. The internal temperature should never exceed 120⁰C (2.74V) CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 12 of 29...
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Page 13: Output Module Operation
3% of the time, disabled for 97% and will attempt to restart at approximately 125 ms intervals. The module remains in this state until the short circuit condition is removed, at which point normal operation resumes. CM4 App Note 260424 issue 2.1.docx Document No. 260424... - Page 14 All outputs can support a large external capacitance as detailed in the table shown. 12mF The capacitances specified ensure monotonic start-up with rated load applied. Larger capacitances can be applied for lower load currents. 500uF CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 14 of 29...
- Page 15 The optimum solution is to locate a low impedance electrolytic capacitor at the load which will eliminate the inductive cable drop and reduce the typical voltage deviation at the module. CM4 App Note 260424 issue 2.1.docx Document No. 260424...
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Page 16: Advanced Output Module Features
0.9*Vset will cause the power good signal to go low. Where tight voltage adjustment tolerances are required, it is recommended to use external circuitry to provide closed loop control of the V CONTROL pin. CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 16 of 29... - Page 17 PG signal may go low. Where tight current adjustment tolerances are required, it is recommended to use external circuitry to provide closed loop control of the I CONTROL pin. CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 17 of 29...
- Page 18 I signal will provide a measurement of the output current. CONTROL CONTROL Measuring output current Measuring & controlling output current CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 18 of 29...
- Page 19 Also, as COM is connected to an internal voltage that is NOT equivalent to S- or V-, particular attention must be given to grounding issues when interfacing COM to any control circuit in the application. Connecting COM to S- or V- may result in damage to the unit. CM4 App Note 260424 issue 2.1.docx Document No. 260424...
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Page 20: Series Connected Outputs
When large external capacitances are connected to series connected outputs, the maximum input power can be exceeded at start-up and the unit can latch off. Consider sequencing output start-up to prevent exceeding the input power limit when charging large external capacitances. CM4 App Note 260424 issue 2.1.docx Document No. 260424... -
Page 21: Parallel Connected Outputs
The current output signal (I ) can still be used to measure the output current but it must be scaled by N, where N is the number of CONTROL paralleled modules. CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 21 of 29... - Page 22 Care must be taken to avoid differential voltages between the negative power output terminals of share mode paralleled modules as this can cause errors at the control pins. To avoid this, it is recommended to use TDK-Lambda parallel links to parallel modules in share mode.
- Page 23 Care must be taken to avoid differential voltages between the negative power output terminals of share mode paralleled modules as this can cause errors at the control pins. To avoid this, it is recommended to use TDK-Lambda parallel links to parallel modules in share mode.
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Page 24: Mechanical Dimensions And Mounting
0.55 NM Output Module Connection 0.35 NM Input Module Connection 6-32 0.8 NM Unless stated otherwise, all dimensions are in millimeters and in accordance with DIN2768-1/2 CLASS C CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 24 of 29... -
Page 25: Connector Details
1. Cable 14-18AWG, 300V, 16A, 105°C, use appropriately rated crimp terminal. 2. Direct equivalents may be used for any connector parts. 3. All cables must be rated 105°C min, equivalent to UL1015 CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 25 of 29... -
Page 26: Emc Compliance
Where cables must enter or exit the enclosure, good high frequency 100nF decoupling capacitors of sufficient voltage rating should be connected to the cables as close to the entry/exit point as possible. For further details or assistance contact TDK-Lambda. CM4 App Note 260424 issue 2.1.docx Document No. -
Page 27: Reliability
15. Reliability The CM4 series has undergone extensive testing, including HALT and Environmental testing. Reliability data is collected on an ongoing basis. Please contact TDK-Lambda for the most up to date reliability data. The reliability data quoted in the datasheets are the calculated failures per million hours (FPMH) using the Telcordia SR-332, issue 2 standard. -
Page 28: Output Modules
Attaching a heatsink or cooling plate For improved performance, the baseplate of the CM4 unit can be attached to a heatsink or cooling plate. TDK-Lambda has a range of heatsinks available to allow the CM4 to be mounted horizontally or vertically. -
Page 29: Accessories
(Provided with 6x M4 x 10mm Posi-Drive screws 200446 for baseplate mounting and thermal interface 200447) Thermal interface 200447 (170mmx80mm) * For larger pack size part numbers, please contact TDK-Lambda. CM4 App Note 260424 issue 2.1.docx Document No. 260424 Page 29 of 29...
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