Electronic Components Datasheet Search |
|
EQD075A641 Datasheet(PDF) 11 Page - Lineage Power Corporation |
|
EQD075A641 Datasheet(HTML) 11 Page - Lineage Power Corporation |
11 / 15 page Data Sheet March 25, 2008 EQD075 Series Single Output: Eighth Brick Power Modules: 18-60Vdc Input; 3.3 to 5.0Vdc Output; 75W 11 Feature Descriptions (continued) Output Voltage Programming The output voltage is adjustable between 3.0 to 5.5V (A version). A resistor placed between the Trim pin and Sense (+) increases the output voltage and a resistor placed between the Trim pin and Sense (-) decreases the output voltage. Figure 22 shows the circuit configuration using an external resistor. The trim resistor should be positioned close to the module. If the trim pin is not used then the pin shall be left open. If no trim resistor is connected, for the A version, the output voltage will be 5V. The following equations determine the required external resistor value to obtain a percentage output voltage change of Δ%. To decrease output voltage set point: Ω ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − Δ = − K R down trim 2 . 10 % 510 Where, 100 % , , × − = Δ nom o desired nom o V V V Vdesired = Desired output voltage set point (V). To increase the output voltage set point ( ) Ω ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − Δ − Δ Δ + = − K V R nom o up trim 2 . 10 % 510 % * 225 . 1 % 100 * * 1 . 5 , Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum absolute increase in output voltage, due to simultaneous remote sense and trim increases, shall not exceed the larger of the specified individual remote sense or trim maximum limits shown in the Features Specifications table. VO(+) TRIM VO(-) Rtrim-down LOAD VIN(+) ON/OFF VIN(-) Rtrim-up SENSE (+) SENSE (-) Figure 22. Circuit Configuration to program output voltage using an external resistor. Pre-Bias Immunity The modules are able to start into a pre-biased output with a monotonic rise of the output voltage. During shutdown an internal feature implemented in the module ensures there will be no reverse current. Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 23. The thermal reference point, Tref, used in the specifications is shown in Figure 24. For reliable operation, this temperature should not exceed 125 OC. Please refer to the Application Note “Thermal Characterization Process For Open-Frame Board- Mounted Power Modules” for a detailed discussion of thermal aspects including maximum device temperatures. Figure 24. Tref Temperature Measurement Location. Air flow x Power Module Wind Tunnel PWBs 6.55_ (0.258) 76.2_ (3.0) Probe Location for measuring airflow and ambient temperature 25.4_ (1.0) Figure 23. Thermal Test Set up. Tref |
Similar Part No. - EQD075A641 |
|
Similar Description - EQD075A641 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |