Application Note Introduction System Interface Information I
|
|
|
Top Searches for this datasheet
PTV03010 Single
Application Note
Introduction System Interface Information
Input Capacitor Output Capacitance (Optional) Tantalum Capacitors Ceramic Capacitors Capacitor Table Designing Very Fast Load Transients
Packaging Information
Packaging Labels Part Numbering Sequence
Safety Information
Safety Standards Approvals Fuse Information Safety Considerations
Operating Information Mechanical Information
Mechanical Outline Drawing Pin-out Table Description Ground Vout Adjust Track Inhibit Overcurrent Protection (OCP) Soft-Start Power-Up
Feature
Adjusting Output Voltage Output ON/OFF Inhibit Pre-bias Start-up Capability Conditions Pre-Bias Holdoff Demonstration Circuit
Thermal Information
Thermal Reference Points Safe Operating Curve Thermal Test Set-up
Manufacturing Environment
Recommended Land Pattern
Auto-TrackAuto-TrackFunction Auto-TrackWorks Typical Applications Notes Auto-Track11
Rev. December 2005
File Name: an_ptv03010.pdf
PTV03010 Single Series Application Note
Introduction
PTH/PTV family non-isolated, wide-output adjust power modules from Artesyn Technologies optimized applications that require flexible, high performance module that small size. These products part "Point-of-Load Alliance" (POLA), which ensures compatible footprint, interoperability true second sourcing customer design flexibility. POLA collaboration between Artesyn Technologies, Astec Power Texas Instruments offer customers advanced non-isolated modules that provide same functionality form factor. Product series covered alliance includes PTHxx050 PTHxx060 PTHxx010 (15/12 PTHxx020 (22/18 PTHxx030 (30/26 PTHxx040 (50/60 PTVxx010 PTVxx020 A/18 From basic, "Just Plug functionality modules, rated feature-rich PTHxx030W, series these products were designed very flexible, simple use. features vary with each product series. Table provides quick reference available features series input voltage. simple point-of-use applications, PTHxx050 series provides operating features such on/off inhibit, output voltage trim, prebias start-up (3.3/5 input only), over-current protection. PTHxx060 PTHxx010 (15/12 series output voltage sense, margin up/down controls. higher output current, PTHxx020 PTHxx030 series also incorporates overtemperature shutdown protection. products referenced Table include Auto-TrackTM. This feature unique PTH/PTV family, specifically designed simplify task sequencing supply voltage power system. These other features described following sections.
SERIES
INPUT
ADJUST
ON/OFF INHIBIT
OVERCURRENT
PRE-BIAS STARTUP
AUTOTRACKTM*
OUTPUT SENSE
THERMAL SHUTDOWN
TRIM
PTVxx010
3.3/5 3.3/5
PTVxx020
Table Operating Features Series Input Voltage
RoHS Compliance Ordering Information PTV03010WAH order Pb-free (RoHS compatible) through-hole parts replace mounting option with `D', e.g. PTV03010WAD.
*Auto-trackis trade mark Texas Instruments
File Name: an_ptv03010.pdf (04): 2005
Application Note
System Interface Information
Input Capacitor required input capacitors ceramic minimum electrolytic type. capacitance must rated ripple current capability. Table above ripple current requirements conditional that ceramic capacitor present. X5R/X7R ceramic capacitor necessary reduce both magnitude ripple current through electrolytic capacitor amount ripple current reflected back input source. Ceramic capacitors should located within inch. (1.3 module's input pins. Additional ceramic capacitors added reduce ripple current requirement electrolytic capacitor. Ripple current (Arms) rating, less than equivalent series resistance (ESR), temperature major considerations when selecting input capacitors. Unlike polymer-tantalum capacitors, regular tantalum capacitors have recommended minimum voltage rating (max. voltage ripple). This standard practice ensure reliability. Only tantalum capacitors were found have sufficient voltage rating meet this requirement. temperatures below aluminum electrolytic capacitors increases. these applications, Os-Con, polymertantalum, polymer-aluminum types should considered. Output Capacitance (Optional) applications with load transients (sudden changes load current), regulator response benefits from external output capacitance. recommended output capacitance allows module meet transient response specification. most applications, high-quality computer-grade aluminum electrolytic capacitor adequate. These capacitors provide decoupling over frequency range, kHz, suitable when ambient temperatures above operation below tantalum-, ceramic, Os-Con-type capacitors recommended. When using more non-ceramic capacitors, calculated equivalent should lower than using manufacturer's maximum single capacitor). list preferred low-ESRtype capacitors identified Table 2.2.1 Tantalum Capacitors Tantalum-type capacitors only used output bus, recommended applications where ambient operating temperature less than TPS, Sprague 593D/594/595 Kemet T495/T510 capacitor series suggested over many other tantalum types their higher rated surge, power dissipation, ripple current capability. caution, many general-purpose tantalum capacitors have considerably higher ESR, reduced power dissipation, lower ripple current capability. These capacitors also less reliable they have reduced power dissipation surge current ratings. Tantalum capacitors that have stated surge current rating recommended power applications. When specifying Os-con polymer tantalum capacitors output, minimum limit encountered before maximum capacitance value reached. 2.2.2 Ceramic Capacitors Above kHz, performance aluminum electrolytic capacitors less effective. Multilayer ceramic capacitors have resonant frequency higher than bandwidth regulator. They used reduce reflected ripple current input well improve transient response output. When used output, their combined critical long total value ceramic capacitance does exceed approximately Also, prevent formation local resonances, place more than five identical ceramic capacitors parallel with values greater. 2.2.3 Capacitor Table Table identifies characteristics capacitors from number vendors with acceptable ripple current (rms) ratings. recommended number capacitors required both input output buses identified each capacitor type. This extensive capacitor list. Capacitors from other vendors available with comparable specifications. Those listed guidance. ripple current rating kHz) critical parameters necessary insure both optimum regulator performance long-term reliability. 2.2.4 Designing Very Fast Load Transients transient response dc-dc converter been characterized using load transient with di/dt A/µs. typical voltage deviation this load transient given datasheet specification table using optional value output capacitance. di/dt transient increased, response converter regulation circuit ultimately depends output capacitor decoupling network. This inherent limitation with dc-dc converter once speed transient exceeds bandwidth capability. target application specifies higher di/dt lower voltage deviation, requirement only with additional output capacitor decoupling. these cases, special attention must paid type, value, capacitors selected. transient performance requirements exceed that specified datasheet, total amount load capacitance above 3,000 selection output capacitors becomes more important.
File Name: an_ptv03010.pdf (04): 2005
www.artesyn.com
PTV03010 Single Series Application Note
CAPACITOR CHARACTERISTICS CAPACITOR VENDOR/ SERIES Panasonic (SMD) (SMD) United Chemi-Con (Radial) (Radial) (SMD) (SMD) Nichicon (Radial) Sanyo Poscap Os-Con SVP, Os-Con (SMD) Tantalum Series (SMD) Kemet T520, Poly-Tant T530, Poly-Tant/ Organic Vishay-Sprague 94SVP, (Oscon) 595D, Tantalum 94SA, Os-Con Kemet Ceramic (SMD) Murata, Ceramic (SMD) WORKING VOLTAGE VALUE (µF) (ESR) EQUIVALENT PHYSICAL SERIES RIPPLE SIZE (mm) RESISTANCE CURRENT (rms) 0.117 0.035 0.016 0.02 0.12 0.09 0.027 0.09 0.072 0.025 0.035 0.04 0.075 0.05 0.055 0.01 0.04 0.14 0.03 0.002 0.002 0.002 0.002 3050 3160 2800 2400 >1900 1810 >1090 >1559 1500 >3800 2120 1040 2670 11.5 10.0 12.5 10.0 10.0 10.0 12.5 11.5 10.0 10.5 3225 3225 3225 3225
QUANTITY OPTIONAL OUTPUT VENDOR PART NUMBER EEUFC1A331 EEFWA0J151P EEVFK0J471P PSA6.3VB220MF11 LXZ10VB471M8X12LL MVZ16VC681MJ10TP PXA10VC121MH70TP UPM1C271MHH6 UHD1A471MPR 10TPE220M 6SP120M 6SVP100M TPSC107M010R0075 TPSD157M010R0050 T520D107M010ASE055 T530X337M010ASE010 94SVP127X0010E7 595D227X0010D2T 94SA107X0010EBP C1210C106M4PAC C1210C226K9PAC C1210C476K9PAC GRM32ER60J107M GRM32ER60J476M GRM32ER61C226K GRM32DR61C106K C3225X5R0J107MT C3225X5R0J476MT C3225X5R1C226MT C3225X5R1C106M
INPUT 1(1) 1(2) 1(2) 1(2) 1(2) 1(2) 1(2) 1(2) 1(2) 1(2) 1(2) 1(2)
TDK, Ceramic (SMD)
0.002
3225
Table Recommended Input/Output Capacitors
File Name: an_ptv03010.pdf (04): 2005
Application Note
Mechanical Information
Mechanical Outline Drawing Description 3.3.1 Ground This common ground connection Vout power connections. also reference control inputs. Both pins must connected common ground.
FRONT VIEW
SIDE VIEW 0.330±0.008 (8.38±0.20)
3.3.2 Vout regulated positive power output with respect node.
0.900 (22.86)
0.400 (10.16)
0.150 (3.81)
0.025 (0.64) Places
0.020 (0.51) 0.100 (2.54) Typ.
3.3.3 Adjust tolerance better) resistor must connected directly between this pins (GND) output voltage desired value. point range output voltage from 0.8-2.5 resistor required given output voltage calculated from following formula. left open circuit, module output will default lowest output voltage value. specification table gives preferred resistor values number standard output voltages.
Dimensions Inches (mm) Tolerances (unless otherwise specified) Places ±0.030 (±0.76) Places ±0.010 (±0.25)
0.100 (2.54)
Rset
Figure -Mechanical Drawing Pin-out Table CONNECTIONS NUMBER FUNCTION Ground Vout Vout Adjust Track Ground Inhibit
2.49 Vout
3.3.4 Track This analog control input that allows output voltage follow another voltage during power-up power-down sequences. active from nominal set-point voltage. Within this range module's output will follow voltage Track volt-for-volt basis. When control voltage raised above this range, module regulates nominal output voltage. unused, this input maybe left unconnected. further information consult section Note: undervoltage lockout feature, output module cannot follow input voltage during power 3.3.5 Inhibit Inhibit open-collector/drain negative logic input that referenced GND. Applying level ground signal this input disables module's output turns output voltage. When Inhibit control active, input current drawn regulator significantly reduced. Inhibit left open-circuit, module will produce output whenever valid input source applied. 3.3.6 positive input voltage power node module, which referenced common GND.
Table Connections
File Name: an_ptv03010.pdf (04): 2005
www.artesyn.com
PTV03010 Single Series Application Note
Packaging Information
Packaging PTV03010 packaged individually anti-static bags then anti-static foam boxes pieces.
19.000 (482.60)
Safety Considerations converter must installed guidelines outlined various safety agency approvals, safety agency approval required overall system.
1.500 (38.10)
Operating Information
Overcurrent Protection (OCP) protection against load faults, modules incorporate output overcurrent protection. Applying load that exceeds overcurrent threshold causes regulated output shut down. Following shutdown, module periodically attempts recover initiating soft-start power This described hiccup mode operation, whereby module continues cycle successive shutdown power until load fault removed. During this period, average current flowing into fault significantly reduced. Once fault removed, module automatically recovers returns normal operation. Soft-Start Power-Up Auto-Track feature allows power multiple PTH/PTV modules directly controlled from Track pin. However, stand-alone configuration, when Auto-Track feature being used, Track should directly connected input voltage, (See Figure
11.000 (279.40)
1.500 (38.10)
UNIT WRAPPED ANTISTATIC BAG, PLACED INTO SLOT. PCES LAYER ANTISTATIC FOAM
PACKAGING MATERIAL: ANTISTATIC FOAM DIMENSIONS INCHES (mm)
Figure PTV03010 Packaging Labels Part Numbering Sequence units series will clearly marked allow ease identification user. Figure gives details models.
SERIES TYPE (POINT LOAD ALLIANCE)
Track PTV03010W Adjust
03010 ZYWWBR
03010
Rset 5.49 0.05
ZYWWBR REV. WEEK CODE MAN.LOCATION/YEAR CODE MODEL TYPE
Figure Soft-Start Power-up Figure PTV03010 Part Numbering When Track connected input voltage, Auto-Track function permanently disengaged. This allows module power entirely under control internal soft-start circuitry. When power under soft-start control, output voltage rises set-point quicker more linear rate.
Safety Information
Safety Standards Approvals models will have full international safety approval including EN60950 UL/cUL1950. Models have been submitted independent safety agencies approval. Fuse Information suitable value fuse (based input ratings) maybe used unearthed input line. However this required compliance with safety.
File Name: an_ptv03010.pdf (04): 2005
Application Note
Feature
Adjusting Output Voltage adjust control (pin sets output voltage PTV03010 product. adjustment range from 0.8-2.5 adjustment method requires addition single external resistor, Rset, that must connected directly between adjust pins1. Table gives preferred value external resistor number standard voltages, along with actual output voltage that this resistance value provides. Figure shows placement required resistor. other output voltages value required resistor either calculated using following formula, simply selected from range values given Table
Figure Power-up Characteristic From moment valid input voltage applied, soft-start control introduces short time delay (typically before allowing output voltage rise. output then progressively rises module's setpoint voltage. Figure shows soft-start power-up characteristic PTV03010, operating from input configured output. waveforms were measured with resistive load Auto-Track feature disabled. initial rise input current when input voltage first starts rise charge current drawn input capacitors. Power-up complete within
Rset
Vout Standard
2.49 Vout
Vout (Actual) 2.502 2.010 1.803 1.504 1.202 1.005
Rset (Preferred Value) 2.21 4.12 5.49 8.87 17.4 36.5 Open
Table Preferred Values Rset Standard Output Voltages
PTV03010W
RSET,
Figure Adjust Resistor Placement
File Name: an_ptv03010.pdf (04): 2005
www.artesyn.com
PTV03010 Single Series Application Note
OUTPUT VOLTAGE SET-POINT RESISTOR VALUES Req'd 0.800 0.825 0.850 0.875 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 1.125 1.150 1.175 1.200 Rset Open 77.5 61.5 50.8 43.2 37.5 33.1 29.5 26.6 24.2 22.1 20.4 18.8 17.5 Req'd 1.225 1.250 1.275 1.300 1.325 1.350 1.375 1.400 1.425 1.450 1.475 1.50 1.55 1.60 1.65 1.70 Rset 16.3 15.3 14.4 13.5 12.7 12.1 11.4 10.8 10.3 9.82 9.36 8.94 8.18 7.51 6.92 Req'd 1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50 Rset 5.93 5.51 5.13 4.78 4.47 4.18 3.91 3.66 3.44 3.22 3.03 2.84 2.67 2.51 2.36 2.22 Figure Typical Application Inhibit Function
Inhibit BSS138 Rset
Track Inhibit PTV03010W
Notes: 0.05 rated resistor used. tolerance should with temperature stability ppm/°C better). Place resistor close regulator possible. Connect resistor between pins using dedicated traces. Never connect capacitors from Adjust either Vout. capacitance added Adjust will affect stability regulator. Table Output Voltage Set-point Resistor Values Output ON/OFF Inhibit applications requiring output voltage ON/OFF control, each series PTH/PTV family incorporates output Inhibit control pin. inhibit feature used wherever there requirement output voltage from regulator turned OFF. power modules function normally when Inhibit left open-circuit, providing regulated output whenever valid source voltage connected with respect GND. Figure shows typical application inhibit function. Note discrete transistor (Q1). Inhibit control internal pull-up +Vin potential. open-collector open-drain device recommended control this input. Turning applies voltage Inhibit control disables output module. then turned off, module will execute soft-start power-up sequence. regulated output voltage produced within Figure shows typical rise both output voltage input current, following turnoff turn corresponds rise waveform, VDS. waveforms were measured with load.
Figure Typical Rise Output Voltage Input Current Pre-Bias Startup Capability pre-bias start-up condition occurs result external voltage being present output power module prior output becoming active. This often occurs complex digital systems when current from another power source backfed through dual-supply logic component, such FPGA ASIC. Another path might clamp diodes, sometimes used part dualsupply power-up sequencing arrangement. pre-bias cause problems with power modules that incorporate synchronous rectifiers. This because under most operating conditions, such modules sink well source output current. PTH/PTV modules incorporate synchronous rectifiers sink current during start-up, whenever Inhibit held low. Start-up includes initial delay (approximately to15 ms), followed rise output voltage under control module internal soft-start mechanism, Figure
File Name: an_ptv03010.pdf (04): 2005
Application Note
7.3.1 Conditions Pre-bias Holdoff order module allow output pre-bias voltage exist (and sink current), certain conditions must maintained. module holds pre-bias voltage when Inhibit held low, whenever output allowed rise under soft-start control. Power-up under soft-start control occurs removal ground signal Inhibit (with input voltage applied), when input power applied with Auto-Track disabled(1). input voltage must also greater than applied pre-bias source(2). soft-start period complete when output begins rising above pre-bias voltage. module then functions normal, sinks current voltage higher than set-point value applied output. Note pre-bias condition present, soft-start period complete when output voltage risen either set-point voltage, voltage applied module Track control pin, whichever lowest, output. 7.3.2 Demonstration Circuit Figure shows start-up waveforms demonstration circuit shown Figure initial rise pre-bias voltage, which passed from VCCIO VCORE voltage rail through ASIC. Note that output current from module (Io2) negligible until output voltage rises above applied pre-bias.
Track PTV03010W Vadj VCORE RSET 8.87 VCCIO
ASIC
Figure Application Circuit Demonstrating Pre-bias Start-up Notes pre-bias start-up feature compatible with Auto-Track. rise output limited voltage applied Track control pin, output sinks current during period that Track control voltage below that back-feeding source. this reason, Auto-Track should disabled when being used. This accomplished connecting Track input voltage, This raises Track well above setpoint. voltage prior start-up, thereby defeating Auto-Track feature. further ensure that regulator output does sink current when power first applied (even with ground signal applied Inhibit control input), input voltage must always greater than applied pre-bias source. This condition must exist throughout power-up sequence power system.
Figure PTV03010W Start-Up
Figure Pre-bias Start-Up Waveforms
File Name: an_ptv03010.pdf (04): 2005
www.artesyn.com
PTV03010 Single Series Application Note
Thermal Information
Thermal Reference Points electrical operating conditions namely: Input voltage, Output voltage, Output current, determine much power dissipated within converter. following parameters further influence thermal stresses experienced converter: Ambient temperature velocity Thermal efficiency system application Parts mounted system that block airflow Real airflow characteristics converter location
Manufacturing Environment
Recommended Land Pattern recommended that customer uses solder mask defined land pattern similar that shown Figure
0.960 (24.38) 0.100 (2.54) TYP. 0.130 (3.3) 0.085 (2.15)
0.370 (9.39)
Safe Operating Area Curve Thermal characterisation data presented datasheet safe operating area curve format which repeated here Figure This curve shows load current versus ambient temperature velocity.
(1.25) Minimum Places Plated Through Holes
RECOMMENDED KEEPOUT
Figure Recommended Land Pattern Power connection should utilize four more vias interior power plane 0.025 (0.63) I.D. input, ground output electrical equivalent.
TEMPERATURE
OUTPUT CURRENT
Figure Safe Operating Curve PTV03010 Vout
conv
Thermal Test Set-up data taken with converter soldered test board which closely represents typical application. test board eight layer with inner layers consisting power ground planes. bottom layers contain minimal amount metalisation. board board spacing inch used. data represented curve indicate natural convection condition i.e. forced air. However, since thermal performance heavily dependent upon final system application, user needs ensure thermal reference point temperatures kept within recommended temperature rating. recommended that thermal reference point temperatures measured using either gauge thermocouples camera. order comply with stringent Artesyn derating criteria, ambient temperature should never exceed Please contact Artesyn Technologies further support.
File Name: an_ptv03010.pdf (04): 2005
Application Note
Auto-Track10.1 Auto-TrackFunction Auto-Track function unique PTH/PTV family, available with POLA products. Auto-Track designed simplify amount circuitry required make output voltage from each module power-up power-down sequence. sequencing more supply voltages during power-up common requirement complex mixed-signal applications that dual-voltage VLSI such DSPs, microprocessors, ASICs. 10.2 Auto-TrackWorks Auto-Track works forcing module output voltage follow voltage presented Track control pin(1). This control range limited between module set-point voltage. Once Track-pin voltage raised above set-point voltage, module's output remains set-point(2). example, Track regulator regulated output voltage Track rises regulated output does higher than When under Auto-Track control, regulated output from module follows voltage Track volt-for-volt basis. connecting Track number these modules together, output voltages follow common signal during power-up powerdown. control signal externally generated master ramp waveform, output voltage from another power supply circuit(3). convenience, track input incorporates internal RC-charge circuit. This operates module input voltage produce suitable rising waveform power-up. 10.3 Typical Application basic implementation Auto-Track allows simultaneous voltage sequencing number Auto-Track compliant modules. Connecting Track control pins more modules forces track control modules follow same collective RC-ramp waveform, allows them controlled through single transistor switch; Figure initiate power-up sequence, recommended that track control first pulled ground potential. This done before input power applied modules, then held least thereafter. This brief period gives modules time complete their internal soft-start initialization. Applying logic level high signal circuit On/Off Control turns applies ground signal Track input modules. After completing their internal softstart initialization, output modules remains zero volts while turned after valid input voltage been applied modules. This allows Track control voltage automatically rise module input voltage. During this period, output voltage each module rises unison with other modules respective set-point voltage. Figure shows output voltage waveforms from circuit Figure after On/Off Control from high-level lowlevel voltage. waveforms, represent output voltages from power modules, (3.3 (1.8 respectively. shown rising together produce desired simultaneous power-up characteristic. same circuit also provides power-down sequence. Powerdown reverse power-up, accomplished lowering track control voltage back zero volts. important constraint that valid input voltage must maintained until power-down complete. also requires that turned relatively slowly. This that Track control voltage does fall faster than Auto-Track slew rate capability, which V/ms. components Figure limit rate which pulls down Track control voltage. values correlate decay rate about 0.17 V/ms. power-down sequence initiated with low-to-high transition On/Off Control input circuit. Figure shows powerdown waveforms. track control voltage falls below nominal set-point voltage each power module, then output voltage decays with other modules under Auto-Track control. Notes Auto-Track1 Track voltage must allowed rise above module set-point voltage before module regulate adjusted set-point voltage prior start-up, thereby defeating AutoTrack feature. Auto-Track function tracks almost voltage ramp during power-up, compatible with ramp speeds V/ms. absolute maximum voltage that applied Track input voltage module cannot follow voltage track control input until completed soft-start initialization. This takes about from time that valid voltage been applied input. During this period, recommended that Track held ground potential. module capable both sinking sourcing current when following voltage track input. Therefore, start into output pre-bias cannot supported when module under Auto-Track control. Note: pre-bias holdoff necessary when supply voltages rise simultaneously under control Auto-Track. Auto-Track function disabled connecting Track input voltage (VI). When Auto-Track disabled, output voltage rises quicker more linear rate after input power been applied.
Track +3.3 PTV03020 Sense Adjust 2.21
Inhibit
0.10 On/Off Control Power Down Power BSS138
Track PTV03010
8.87
Inhibit
Figure Sequenced Power Power Down Using Auto-Track
File Name: an_ptv03010.pdf (04): 2005
www.artesyn.com
PTV03010 Single Series Application Note
Figure Simultaneous Power With Auto-Track Control
Figure Simultaneous Power Down With Auto-Track
Application Note Artesyn Technologies® 2005 information specifications contained this Application Note believed correct time publication. However, Artesyn Technologies accepts responsibility consequences arising from printing errors inaccuracies. information specifications contained described herein subject change manner time without notice. rights under patent accompany sale such product(s) information contained herein. File Name: an_ptv03010.pdf (04): 2005
Other recent searches
TGF4250-EEU - TGF4250-EEU TGF4250-EEU Datasheet
RMB961 - RMB961 RMB961 Datasheet
EM78P153S - EM78P153S EM78P153S Datasheet
B59062 - B59062 B59062 Datasheet
AST055 - AST055 AST055 Datasheet
AST095 - AST095 AST095 Datasheet
AMS2942 - AMS2942 AMS2942 Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
