Reference Design Sequenced Power-Up/Down with the Quad Voltage Supervisor October 2015

Transcription

1 Standard Products Reference Design Sequenced Power-Up/Down with the Quad Voltage Supervisor October 0 The most important thing we build is trust Introduction, (formerly Aeroflex) Quad Voltage Supervisor finds use in voltage monitoring, voltage sequencing, and Fault Detection, Isolation and Recovery (FDIR) schemes. Voltage sequencing is particularly common for FPGA and ASIC applications which require a set order to power up the I/O, high-speed I/O and core supplies to prevent contention and high currents. For the same reasons that these applications have power up specifications, they generally require a power down sequence that inverts the order of power up. Current Quad Voltage Supervisors define an order for power up sequencing and maintain this same order during power down. This design reference discusses a method of using MSI logic with Single and Quad Channel Voltage Supervisors to create an intelligent power sequencer that brings power supplies down in the inverse order from power up. Device Features and Demonstration Board The Intelligent Power Sequencer uses a Cobham Single Channel Voltage Supervisor (UT0VSD) to monitor a systemregulated,.v rail. Cobham MSI products (UT4ACTS0E, UT4ACTS0E) and a Quad Voltage Supervisor (UT04VSP) create the sequencer. Voltage comparators in the Quad Supervisor generate voltage good enables (VOUTx) to sequence the series of regulators. The Quad Supervisor VOUTx signals serve as flags indicating that each monitored system voltage is within tolerance;.v,.v,.v, and.v in this application. The Quad Supervisors RESET/RESETb outputs provide final reset removals after all system voltages are within tolerance. The Cobham Sequencer Demonstration Board provides hardware for demonstrating the sequencing capabilities. v v VRG66.v UT0VSD VRG VRG VRG VRG.v Rail.v PwrGd Sequenced Power Enables.v Rail.v Rail.v Rail.v Rail MSI Sequencing Logic UT4ACTS0E UT4ACTS0E VIN VIN VIN VIN4 UT4ACTS0E UT4ACTS0E EN EN EN EN4 VOUT VOUT VOUT VOUT4 RESET UT4ACTS0E RESETB UT04VSP Figure. Intelligent Power Sequencer Block Diagram

2 October 0 Intelligent Power Sequencing Application Quad Voltage Supervisor Single Voltage Supervisor MSI LOGIC Figure. Demonstration Board Front (left) Figure. Demonstration Board Back (right) Intelligent Power Sequencing Application The Intelligent Power Sequencer uses a Cobham Single Channel Voltage Supervisor (UT0VSD) to monitor a system-regulated,.v rail. This creates a System Power Good (.v PWRGD) used to start the sequencer. The MSI logic combines with the START switch to initiate power up. Voltage comparators in the Quad Supervisor (UT04VSP), create a series of enables to start the monitored voltages and sequence them up in an order of VOUT, VOUT, VOUT, and then VOUT4. The comparators in the Quad Supervisor verify each voltage rail is within tolerance before enabling the next rail. Removing START causes the Quad Supervisor and MSI to disable the voltage regulators in the inverse order of power-up. If PWRGD faults, the logic disables each voltage rail in reverse sequence to start up. The Quad Supervisor disables each power rail as the logic waterfall occurs. This shutdown can occur in less than 6uS. However, using a series resistor to drive a grounded capacitor and the enable signals on the Quad Supervisor provides adjustable timings for both the power up and power down sequences to meet timing requirements of the system

3 October 0 Conclusion Figure 4. MSI Logic Schematic 4 Conclusion The Cobham UT04VSP Quad Supervisor uses MSI logic to sequence voltage rails in any order with adjustable delays for each rail. This design provides a solution to FPGA and ASIC sequenced power-up and power down requirements. The power down sequences quick, which allows for emergency shutdowns. However, if power-down delays are necessary, a simple R-C delay connected to the voltage supervisor enable pins is feasible. Please see our Build of Materials (BOM) and schematics for full design reference

4 October 0 Conclusion Table. Reference Design BOM Reference FN Qty. Part Number Description PKG MFG Designators 0 PWB Sequenced Power PCB PCB Board (Sierra) 4" x 4" Sierra Circuits 6 C,C9,C,C,C,C7 TAJR04K00RNJ CAP,TANT,0.uF,0V,0%,0 AVX Corporation Alt ND DigiKey C,C,C,C, C 6TPU0MSI CAP,TANT,0uF,6.V,0%,0 Panasonic Alt P64CT-ND DigiKey 4 C,C4,C,C6 0A6FATA CAP,CER,60pF,0V,%,0 Kemet 0 Alt ND DigiKey 4 C7 C60C0GH60F00AA CAP,CER,6pF,0V,%, TDK Corporation Alt ND DigiKey C,C0,C,C4, C6,C4,C,C 6,C,7,C,C9 C0C0FGACTU CAP,CER,0.0uF,0V,%,0 0 Kemet Alt ND DigiKey 6 C0,C CCJRACTU CAP,CER,.uF,0V,%, Kemet Alt ND DigiKey 7 4 D,D,D,D4 LTST-C7GKT Green_LED Lite-On Inc Alt ND DigiKey J,J,J STC0SYAN HEADER x_header Sullins Connector Alt S9000-ND DigiKey 9 6 J4,J,J6,J7,J,J9 7-4 Solder_Banana_Jack_Singl e ban_jack_solder_ 7-4 KeystoneElectroni cs Alt 7-4K-ND DigiKey 0 PB Push_Button sw_raconsmd C&K Components Alt CKN96CT-ND DigiKey 4 R,R,R,R6 ERJ-6ENF00V RES,K,%,0.W,0 Panasonic Alt P.00KCCT-ND DigiKey R,R9,R,R,R PLT0Z0AST RES,K,0.0%,.W,0 Vishay Thin Film Alt PLT0-KACT-ND DigiKey R4 ERA-6AEB0V RES,K,0.%,0.W,00 Panasonic Alt PKDACT-ND DigiKey 4 R7,R0,R ERA-6AEB7V RES,.7K,0.%,0.W,0 Panasonic Alt P.7KDACT-ND DigiKey R ERA-6AEBV RES,.K,0.%,0.W,0 Panasonic Alt P.KDACT-ND DigiKey

5 October 0 FN Qty. Reference Designators Table. (Continued) Reference Design BOM Part Number Description PKG MFG 6 R ERA-6AEB69V RES,.69K,0.%,0.W,0 Panasonic Alt P.69KDACT-ND DigiKey 7 R4 ERA-6AEB7V RES,.7K,0.%,0.W,0 Panasonic Alt P.7KDACT-ND DigiKey R6 ERA-6AEB4V RES,4.K,0.%,0.W,0 Panasonic Alt P4.KDACT-ND DigiKey 9 R7 ERA-6AEB47V RES,4.7K,0.%,0.W,0 Panasonic Alt P4.7KDACT-ND DigiKey 0 R9 ERJ-EKF690V RES,69,%,0.W, Panasonic Alt P69HCT-ND DigiKey R0 ERJ-EKF70V RES,7,%,0.W, Panasonic Alt P7HCT-ND DigiKey R ERJ-EKF90R9V RES,90.9,%,0.W, Panasonic Alt P90.9HCT-ND DigiKey R ERJ-EKF7R0V RES,7,%,0.W, Panasonic Alt P7.0HCT-ND DigiKey 4 0 R4,R6,R,R 0,R,R4,R,R 6,R7,R ERJ-EKF00V RES,0K,%,0.W, Panasonic Alt P0.0KHCT-ND DigiKey SW 400BWMSPRBLKSM6Q Rocker Switch sw_400bwm E-Switch E Alt EG46CT-ND DigiKey 6 U VRG66 LDO VRG66 Cobham/Aeroflex 7 U UT0VSD Volt_Super_Single cfpp0mil Cobham/Aeroflex 4 U,U4,U,U6 AP77-SPG- AP77_LDO soic_therm_pad Diodes Inc. Alt AP77-SPG-DICT-ND DigiKey 9 4 U7,U,U9,U0 UT4ACTS0E MSI_Quad_NOR cfp4p0mil Cobham/Aeroflex 0 U UT4ACTS0E MSI_Quad_AND cfp4p0mil Cobham/Aeroflex U UT04VSP Volt_Super_Quad cfppmil Cobham/Aeroflex

6 October 0 NOTICE TO ALL PERSONS RECEIVING THIS DRAWING THIS DOCUMENT IS THE PROPERTY OF AEROFLEX COLORADO SPRINGS AND IS DELIVERED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE DISCLOSED, REPRODUCED IN WHOLE OR IN PART, D OR IS USED FOR MANUFACTURE FOR ANYONE OTHER THAN AEROFLEX WITHOUT ITS WRITTEN CONSENT; AND THAT NO RIGHT IS GRANTED TO DISCLOSE OR SO USE ANY INFORMATION CONTAINED IN SAID DOCUMENT. 4 REVISION BLOCK Date Sheet Approved Change Summary Rev //04 N/A -- Initial Release 00 D C C B B A A Notes: Cobham Hi-Rel 40 Centennial Blvd. Colorado Springs, CO Red text denotes layout instructions Green text denotes silkscreen markings Blue text denotes population options 4 Sequenced Power Supervisor Size Scale CAGE Code DWG NO Rev C 64 <Doc> of Wednesday, December 7, 04 Sheet

7 October 0 Figure. System Block Diagram Table. Board Specifications Generic Specifications Board Dimensions 4" x 4" Board Maximum NA Weight Number of Layers: 4 Dielectric Material FR-4 Dielectric Thickness < mil Outer Layer Copper oz Weight Inner Layer Copper oz Weight Differential Line mil Spacing Default Trace Width mil Voltage Rails Voltage Current (amps) Input Internal Rail. Output. 0. Output. 0. Output. 0. Output Layer Definition Name Type Layer Top Sig/Pwr Layer GND GND Layer GND GND Layer 4 BTM Sig/Pwr

8 October 0 Figure 6. Schematic - Input Power

9 October 0 Qb0 Set_sr Qb0 Reset_sr U7 Y VDD 4 A Y4 4 B B4 Y A4 0 6 A Y 9 7 B B VSS A MSI_Quad_NOR Set_sr Start_b C9 Power_Good_b Reset_sr Set_sr 0.uF Set_sr C 0.0uF R6 K ohm J HEADER Output_En R J HEADER K ohm rs_ OUT_ rs_ OUT_ U Y VDD 4 A Start_b Y4 C B Start 4 B4 C C0 Y A4 0.uF A rs_ 6 Y 9 B OUT_4 0.uF 0.0uF 7 B VSS A MSI_Quad_NOR SW Vin Vout Vin Rocker Switch Start Qb SR SR Qb rs_ U9 Y VDD 4 A Y4 4 B B4 Y A4 0 6 A Y 9 7 B B VSS A MSI_Quad_NOR SR rs_ C Qb Qb 0.uF OUT_ SR C 0.0uF SR Output_En EN SR Output_En EN U A B 4 Y A 6 B 7 Y VSS MSI_Quad_AND VDD 4 B4 A4 Y4 0 B 9 A Y Output_En SR4 C7 EN Output_En 0.uF SR EN4 C6 0.0uF Qb SR OUT_ SR Qb rs_ U0 Y VDD 4 SR4 A Y4 B Qb0 4 B4 C Y Qb4 A4 0 A Qb4 6 Y 9 B OUT_ 7 B 0.uF VSS A SR4 MSI_Quad_NOR C4 0.0uF Cobham Hi-Rel 40 Centennial Blvd. Colorado Springs, CO MSI Logic Figure 7. Schematic - MSI Logic Wednesday December 7 04 Size B Scale CAGE Code DWG NO Rev 64 <Doc> Sheet 0 4 f

10 October 0 EN R9 K ohm U Vin Vout 7 PG FB 6 4 Vcc SS EN GND 9 AP77_LDO TH C 60pF R7 R.7K ohm.k ohm R9 LDO_V 69 ohm D Green_LED.V Power J banana_jack EN4 R K ohm U6 Vin Vout 7 PG FB 6 4 Vcc SS EN GND 9 AP77_LDO TH C6 60pF R6 R7 4.K ohm 4.7K ohm LDO_V R 7 ohm.v Power J6 banana_jack D4 Green_LED R4 0K ohm R6 0K ohm R 0K ohm R0 0K ohm OUT_ OUT_ OUT_ OUT_4 Reset Reset_b C4 C C6 C9 C7 0.0uF 0.0uF 0.0uF 0.0uF 0.0uF Sequenced Power Supervisor.V.V.V.V R 0K ohm R4 0K ohm C 0.0uF LDO_V J7 EN R K ohm U4 Vin Vout 7 PG FB 6 4 Vcc SS EN GND 9 AP77_LDO TH C4 60pF R0 R.7K ohm.69k ohm R0 7 ohm D Green_LED.V Power banana_jack LDO_V LDO_V EN LDO_V LDO_V EN EN EN4 4 U EN VIN EN VIN NC OVSH TH TH0 TOL EN VIN EN4 VIN4 VSS VDD 7 VOUT OUT_ 6 CDLY CDLY VOUT OUT_ 4 CDLY CDLY MRB OUT_4 INV RESET_B Reset_b 0 CRESET 9 RESET Reset VOUT OUT_ 7 CDLY CDLY 6 VOUT4 OUT_4 CDLY4 CDLY4 C7 6pF 0uF C 0uF C 0uF C C 0uF R K ohm LDO_V J Volt_Super_Quad R 0K ohm CDLY R6 0K ohm CDLY R7 0K ohm CDLY R 0K ohm CDLY4 EN U Vin Vout 7 PG FB 6 4 Vcc SS EN GND 9 AP77_LDO TH C 60pF R R4.7K ohm.7k ohm R 90.9 ohm banana_jack D Green_LED.V Power Cobham Hi-Rel 40 Centennial Blvd. Colorado Springs, CO Figure. Schematic - Output Power O t t P

11 October 0 This product is controlled for export under the U.S. Department of Commerce (DoC). A license may be required prior to the export of this product from the United States. 40 Centennial Blvd Colorado Springs, CO 0907 E: info-ams@aeroflex.com T: Aeroflex Colorado Springs Inc., dba, reserves the right to make changes to any products and services described herein at any time without notice. Consult Aeroflex or an authorized sales representative to verify that the information in this data sheet is current before using this product. Aeroflex does not assume any responsibility or liability arising out of the application or use of any product or service described herein, except as expressly agreed to in writing by Aeroflex; nor does the purchase, lease, or use of a product or service from Aeroflex convey a license under any patent rights, copyrights, trademark rights, or any other of the intellectual rights of Aeroflex or of third parties Cobhan.com/HiRel