Electronic Components Datasheet Search |
|
PQ30033QGA25NNS Datasheet(PDF) 10 Page - SynQor Worldwide Headquarters |
|
PQ30033QGA25NNS Datasheet(HTML) 10 Page - SynQor Worldwide Headquarters |
10 / 14 page Product # PQ30033QGA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG33MU Rev. A 07/11/05 Page 10 Input: Input: Output: Output: Current: Current: PPackage: ackage: 19-60 V 19-60 V 3.3 V 3.3 V 30 A 30 A Quarter-brick Quarter-brick T Technical S echnical Specification pecification BASIC OPERATION AND FEATURES The PowerQor series converter uses a two-stage power conver- sion topology. The first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temper- ature. The second stage uses a transformer to provide the func- tions of input/output isolation and voltage step-down to achieve the low output voltage required. Both the first stage and the second stage switch at a fixed fre- quency for predictable EMI performance. Rectification of the transformer’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low on-state resis- tance, dissipate far less energy than Schottky diodes. This is the primary reason that the PowerQor converter has such high effi- ciency, even at very low output voltages and very high output cur- rents. Dissipation throughout the converter is so low that it does not require a heatsink for operation. Since a heatsink is not required, the PowerQor converter does not need a metal baseplate or pot- ting material to help conduct the dissipated energy to the heatsink. The PowerQor converter can thus be built more simply and reliably using high yield surface mount techniques on a PCB substrate. The PowerQor series of half-brick and quarter-brick converters uses the industry standard footprint and pin-out configuration. CONTROL FEATURES REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits the user to control when the converter is on or off. This input is referenced to the return terminal of the input bus, Vin(-). There are two versions of the converter that differ by the sense of the logic used for the ON/OFF input. In the positive logic version, the ON/OFF input is active high (meaning that a high turns the converter on). In the negative logic version, the ON/OFF signal is active low (meaning that a low turns the converter on). Figure A details five possible circuits for driving the ON/OFF pin. Figure B is a detailed look of the inter- nal ON/OFF circuitry. REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs cor- rect for voltage drops along the conductors that connect the con- verter’s output pins to the load. Pin 7 should be connected to Vout(+) and Pin 5 should be con- nected to Vout(-) at the point on the board where regulation is desired. A remote connection at the load can adjust for a voltage drop only as large as that specified in this datasheet, that is [Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] < Sense Range % x Vout Pins 7 and 5 must be connected for proper regulation of the out- put voltage. If these connections are not made, the converter will deliver an output voltage that is slightly lower than its specified value. Note: the output over-voltage protection circuit senses the voltage Open Collector Enable Circuit Figure A: Various circuits for driving the ON/OFF pin. Figure B: Internal ON/OFF pin circuitry Remote Enable Circuit Direct Logic Drive Negative Logic (Permanently Enabled) Positive Logic (Permanently Enabled) ON/OFF Vin(_ ) ON/OFF ON/OFF Vin(_ ) ON/OFF 5V TTL/ CMOS Vin(_ ) ON/OFF Vin(_) Vin(_ ) TTL 5V 50k 162k Vin(+) ON/OFF Vin(_) 50k 100pF |
Similar Part No. - PQ30033QGA25NNS |
|
Similar Description - PQ30033QGA25NNS |
|
|
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 |