Electronic Components Datasheet Search |
|
JW075A Datasheet(PDF) 10 Page - Tyco Electronics |
|
JW075A Datasheet(HTML) 10 Page - Tyco Electronics |
10 / 20 page 10 10 Tyco Electronics Corp Data Sheet July 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W JW050A, JW075A, JW100A, JW150A Power Modules: Safety Considerations For safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., UL1950, CSA C22.2 No. 950-95, and VDE 0805 (EN60950, IEC950). If the input source is non-SELV (ELV or a hazardous voltage greater than 60 Vdc and less than or equal to 75 Vdc), for the module’s output to be considered meet- ing the requirements of safety extra-low voltage (SELV), all of the following must be true: s The input source is to be provided with reinforced insulation from any hazardous voltages, including the ac mains. s One VI pin and one VO pin are to be grounded or both the input and output pins are to be kept floating. s The input pins of the module are not operator acces- sible. s Another SELV reliability test is conducted on the whole system, as required by the safety agencies, on the combination of supply source and the subject module to verify that under a single fault, hazardous voltages do not appear at the module’s output. Note: Do not ground either of the input pins of the module without grounding one of the output pins. This may allow a non-SELV voltage to appear between the output pin and ground. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a maxi- mum 20 A normal-blow fuse in the ungrounded lead. Feature Descriptions Overcurrent Protection To provide protection in a fault (output overload) condi- tion, the unit is equipped with internal current-limiting circuitry and can endure current limiting for an unlim- ited duration. At the point of current-limit inception, the unit shifts from voltage control to current control. If the output voltage is pulled very low during a severe fault, the current-limit circuit can exhibit either foldback or tai- lout characteristics (output current decrease or increase). The unit operates normally once the output current is brought back into its specified range. Remote On/Off Two remote on/off options are available. Positive logic remote on/off turns the module on during a logic-high voltage on the ON/OFF pin, and off during a logic low. Negative logic remote on/off turns the module off dur- ing a logic high and on during a logic low. Negative logic (code suffix “1”) is the factory-preferred configura- tion. To turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the VI(–) terminal (Von/off). The switch can be an open collector or equivalent (see Figure 20). A logic low is Von/off = 0 V to 1.2 V. The maximum Ion/off during a logic low is 1 mA. The switch should maintain a logic-low voltage while sinking 1 mA. During a logic high, the maximum Von/off generated by the power module is 15 V. The maximum allowable leakage current of the switch at Von/off = 15 V is 50 µA. If not using the remote on/off feature, do one of the following: s For negative logic, short ON/OFF pin to VI(–). s For positive logic, leave ON/OFF pin open. 8-720 (C).c Figure 20. Remote On/Off Implementation SENSE(+) VO(+) SENSE(–) VO(–) VI(–) Ion/off ON/OFF VI(+) LOAD Von/off |
Similar Part No. - JW075A |
|
Similar Description - JW075A |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |