 |
전자부품 데이터시트 검색엔진 |
|
|
전자부품 데이터시트 검색엔진 |
|
QSW025A0B1Z 데이터시트(PDF) 8 Page - Lineage Power Corporation |
|
||||||||||||||||||||||||||||||
QSW025A0B1Z 데이터시트(HTML) 8 Page - Lineage Power Corporation |
|
|
8 / 16 page  Data Sheet February 16, 2009 QSW025A0B Series Power Modules; DC-DC Converters 36 – 75Vdc Input; 12Vdc Output; 25A Output Current 8 LINEAGE POWER Feature Descriptions Overcurrent Protection To provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limiting for a few mili- seconds. If the overcurrent condition persists beyond a few milliseconds, the module will shut down and remain latched off. The overcurrent latch is reset by either cycling the input power or by toggling the on/off pin for one second. If the output overload condition still exists when the module restarts, it will shut down again. This operation will continue indefinitely until the overcurrent condition is corrected. An auto-restart option is also available. An auto-restart feature continually attempts to restore the operation until fault condition is cleared. 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 during a logic high and on during a logic low. Negative logic, device code suffix "1," is the factory-preferred configuration. The on/off circuit is powered from an internal bias supply. 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 12). A logic low is Von/off = -0.3V to 0.8V. The typical Ion/off during a logic low is 10 µA. The switch should maintain a logic-low voltage while sinking 10µA. During a logic high, the maximum Von/off generated by the power module is 3.5V. The maximum allowable leakage current of the switch at Von/off = 2.0V is 4µA. If using an external voltage source, the maximum voltage V on/off on the pin is 13.5V with respect to the Vi (-) terminal. If not using the remote on/off feature, perform one of the following to turn the unit on: For negative logic, short ON/OFF pin to VI(-). For positive logic: leave ON/OFF pin open. Figure 12. Remote On/Off Implementation. Output Overvoltage Clamp The output overvoltage clamp consists of a control circuit, independent of the primary regulation loop, that monitors the voltage on the output terminals and clamps the voltage when it exceeds the overvoltage set point. The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage control that reduces the risk of output overvoltage. Overtemperature Protection These modules feature an overtemperature protection circuit to safeguard against thermal damage. The circuit shuts down and latches off the module when the maximum device reference temperature is exceeded. The module can be restarted by cycling the dc input power for at least one second or by toggling the remote on/off signal for at least one second. Input Under/Over voltage Lockout At input voltages above or below the input under/over voltage lockout limits, module operation is disabled. The module will begin to operate when the input voltage level changes to within the under and overvoltage lockout limits. Active Load Sharing (Parallel Operation with –P option) For additional power requirements, the power module can be configured for parallel operation with active load sharing. Good layout techniques should be observed for noise immunity when using multiple units in parallel. To implement active load sharing, the following requirements should be followed: • The share pins of all units in parallel must be connected together. The path of these connections should be as direct as possible. Vin(-) is the return for the active share signal for each module; therefore, all modules in parallel must use the same Vin source. The share signal trace should be placed as close to the Vin(-) power plane as possible. • These modules contain circuitry to block reverse current flow upon start-up, when output voltage is present from other parallel modules, eliminating the requirement for external output ORing devices. However, output ORing devices should be used, if fault tolerance is desired in parallel applications. • When using modules in parallel without output ORing devices, the On/Off signal for one module shall be 40mS ahead of the other modules, to allow output voltage to be established, before the remaining modules startup. If using output ORing devices, the 40mS delay is not required. • When not using the parallel feature, leave the share pin open. VO(+) VO(–) VI(–) + – Ion/off ON/OFF VI(+) LOAD Von/off |
유사한 설명 - QSW025A0B1Z |
|
|
|
링크 URL |
| 개인정보취급방침 |
| ALLDATASHEET.CO.KR |
| ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |
Korean ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
