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CPF1200F280-* Series
BEFORE USING THE POWER SUPPLY UNIT
Be sure to read this instruction manual thoroughly before using this product. Pay attention to all cautions and warnings before
using this product. Incorrect usage could lead to an electrical shock, damage to the unit or a fire hazard.
DANGER
Never use this product in locations where flammable gas or ignitable substances are present.
INSTALLATION WARNING
When installing, ensure that work is done in accordance with the instruction manual. When installation is improper, there is risk
of electric shock and fire.
Installation shall be done by Service personnel with necessary and appropriate technical training and experience. There is a risk
of electric shock and fire.
Do not cover the product with cloth or paper etc. Do not place anything flammable around. This might cause damage, electric
shock or fire.
WARNING on USE
Do not touch this product or its internal components while circuit in operation, or shortly after shutdown. You may receive a
burn.
While this product is operating, keep your hands and face away from it as you may be injured by an unexpected situation.
There are cases where high voltage charge remains inside the product. Therefore, do not touch even if they are not in operation as
you might get injured due to high voltage and high temperature. You might also get electric shock or burn.
Do not make unauthorized changes to this product nor remove the cover as you might get an electric shock or might damage the
product. We will not be held responsible after the product has been modified, changed or disassembled.
Do not use this product under unusual condition such as emission of smoke or abnormal smell and sound etc. Please stop using it
immediately and shut off the product. It might lead to fire and electric shock. In such cases, please contact us. Do not attempt
repair by yourself, as it is dangerous for the user.
Do not operate and store these products in environments where condensation occurs due to moisture and humidity. It might lead
fire and electric shock.
Do not drop or apply shock to this product. It might cause failure. Do not operate these products mechanical stress is applied.
CAUTION on MOUNTING
Confirm connections to input terminals, output terminals and signal terminals are correct as indicated in the instruction manual
before switching on.
Input voltage, Output current, Output power, Base-plate temperature, ambient temperature and ambient humidity should be kept
within specifications, otherwise the product will be damaged or malfunctioned.
Input line and output line, please use the wires as short and thick as possible.
Do not use this product in special environment with strong electromagnetic field, corrosive gas or conductive substances and
direct sunlight, or places where product is exposed to water or rain.
Mount this product properly in accordance with the instruction manual, mounting direction and shall be properly be ventilated.
Please shut down the input when connecting input and output of the product.
When mounted in environments where there is conductive foreign matter, dust or liquid, there is possibility of product failure or
malfunction. Such as install filter, please consider that a conductive foreign matter, dust and liquid do not invade inside the power
supply.
All specifications are subject to change without notice.
Instruction Manual
TDK-Lambda
CPF1200F 280-* Series
INSTRUCTION MANUAL
1 / 18
CA835-04-11/S1

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Summary of Contents for TDK-Lambda CPF1200F280 Series

  • Page 1 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL CPF1200F280-* Series Instruction Manual BEFORE USING THE POWER SUPPLY UNIT Be sure to read this instruction manual thoroughly before using this product. Pay attention to all cautions and warnings before using this product. Incorrect usage could lead to an electrical shock, damage to the unit or a fire hazard.
  • Page 2: Caution On Use

    The information in this document is subject to change without prior notice. Please refer to the latest version of the data sheet, etc., for the most up-to date specifications of the product.  No part of this document may be copied or reproduced in any form without prior written consent TDK-Lambda. 2 / 18 All specifications are subject to change without notice.
  • Page 3 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL 1. Model name identification method CPF 1200 F 280 – 14/ Optional (*1) (*1) /Blank: Standard /T: Mounting stand φ 3.3 Rated Output Voltage (Non-threaded through hole) /S: Short type terminal Pin Input Voltage (Length: 3.0mm)
  • Page 4: Block Diagram

    TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL 3. Block Diagram +Vin -Vin TRIM Switching Frequency : 200kHz 4. Sequence Time Chart Input Voltage OVP Set Point OCP Set Point LVP Trim Point Vout Output Voltage RESET RESET RESET > 100ms > 100ms >...
  • Page 5 INSTRUCTION MANUAL 5. Terminal connecting method In order to use the CPF1200F280 Series, this module must be connected with external components according to Fig.5-1. Pay attention to each wiring. If it is connected to wrong terminal, the power supply will be damaged.
  • Page 6 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Also, ripple current flows across this capacitor. Therefore, verify maximum allowable ripple current this capacitor when selecting component. Verify actual ripple current value by actual measurement. Recommended capacitor value : 22μF and above (Voltage rating 450VDC) Note) 1.
  • Page 7 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Table 5-1 C7: Recommended Values of External Output Capacitor Vout 25V 1,500μF x 2 parallel Note) 1. Use low impedance electrolytic capacitor with excellent temperature characteristics. (Nippon Chemicon LXY Series or equivalent) 2. Use capacitors indicated in table 5-2 in parallel when ambient temperature becomes lower than –20℃...
  • Page 8: Output Voltage Adjustment Range

    TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL ● Reverse Input Connection Reverse input polarity would cause module damage. For cases where reverse connections are possible, connect a protective diode and fuse. Use protective diode with higher voltage rating than the input voltage, and with higher surge current rating than the fuse.
  • Page 9 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Fig.6-2 Limit of Input Voltage Note: For curve inflection points A and B, the tolerances are ±0.5V(A:11 ± 0.5V) and ±5V(B:245 ± 5V) respectively. ● Output Voltage Adjustment by External Resistor or Variable Resistor Resistor values, as well as, connecting methods for external resistor (Rex) and external variable resistor (VR) are described below.
  • Page 10: Maximum Line Regulation

    TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Load TRIM External Voltage Fig.6-4 Output Voltage Adjustment by applying external voltage For applications other than the above, refer to the trim circuit as shown in fig.6-5 and determine external circuit and component values.
  • Page 11: Maximum Load Regulation

    TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL input voltage range. 6-5. Maximum Load Regulation Maximum value of output voltage change when output current is gradually varied (steady state) within specified output current range. When using at dynamic load mode, audible noise could be heard from the power module and output voltage fluctuation might increase.
  • Page 12 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Fig.6-7 Remote Sensing at Use Fig.6-8 Remote Sensing Not in Use 6-10. ON/OFF Control (CNT, SG terminal) Without turning the input supply on and off, the output can be enable and disabled using this function.
  • Page 13: Operating Ambient Temperature

    TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Load Load Load Fig.6-10 Series Operation in High Output Voltage Fig.6-11 ±Output Series Operation 6-13. I.O.G. signal (IOG terminal) Normal or abnormal operation of the power module can be monitored by using the IOG terminal. Output of this signal monitor is located at secondary side (output side) and is an open collector output.
  • Page 14 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Baseplate temperature (°C) Fig.6-13 Derating curve For better improvement of power module reliability, derating of baseplate temperature when using is recommended. 6-17. Operating Ambient Humidity Take note that moisture could lead to power module abnormal operation or damage.
  • Page 15 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL Withstand Withstand Voltage tester Voltage tester +Vin +Vin +Vin -Vin -Vin -Vin Withstand Baseplate Voltage tester BasePlate BasePlate 2.5kVAC 1minute (20mA) 3kVAC 1minute (20mA) 500VDC 1minute Fig.6-14 Withstand Voltage Tester Fig.6-15 Withstand Voltage Tester Fig.6-16 Withstand Voltage Tester...
  • Page 16: Mounting Method

    6-24. Withstand Vibration Refer to Application Notes “Mounting Method” section. 6-25. Withstand Shock Withstand shock value is defined to be the value at TDK-Lambda shipment and packaging conditions. 7. Mounting Method 7-1. Mounting Method These products can be used in any orientation but be sure to consider enough airflow to avoid heat accumulation around the power supply.
  • Page 17 TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL increase because of voltage drop of pattern. Relationship between allowable current and pattern width varies depending on materials of printed circuit board, thickness of conductor. It is definitely necessary to confirm on manufacturers of printed circuit board for designing pattern.
  • Page 18: Warranty Period

    TDK-Lambda CPF1200F 280-* Series INSTRUCTION MANUAL 8. 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, SG), remote sensing terminal (+S, -S), output voltage trimming terminal (TRIM) correctly connected? ...

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Cpf1200f280Cpf1200f280-14/s

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