PART NUMBER: VPOL5A-5-SIP DESCRIPTION: point load converter
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PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
features high efficiency topology, typically industry standard footprint wide ambient temperature range, -40C +85C cost efficient open frame design programmable output voltage external resistor from 0.75 3.63 minimum load requirement (stable loads) remote on/off remote sense compensation fixed switching frequency continuous short-circuit protection over current protection over-temperature protection (OTP) monotonic startup with pre-bias output. UL/IEC/EN60950-1 (E222736) certified.
INTRODUCTION VPOL5A-5-SIP CONVERTER FEATURES GENERAL DESCRIPTION Electrical Description Thermal Packaging Physical Design. TECHNICAL SPECIFICATIONS MAIN FEATURES FUNCTIONS Operating Temperature Range Over-Temperature Protection (OTP) Output Voltage Adjustment Over Current Protection Remote on/off UVLO (Under-Voltage Lockout) SAFETY Input Fusing Safety Considerations. APPLICATIONS Layout Design Challenges. Convection Requirements Cooling Thermal Considerations Power De-Rating Curves Efficiency Load Curves Input Capacitance Power Module Test Set-Up VPOL5A-5-SIP Series Output Voltage Adustment. Output Ripple Noise Measurement 7.10 Output Capacitance MECHANICAL OUTLINE DIAGRAMS SIP/SMT05 Mechanical Outline Diagrams
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
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PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
Introduction
This application note describes features functions V-Infinity's VPOL5A-5-SIP series non-isolated dc-dc converters. These highly efficient, reliable compact, high power density, single output dc-dc converters. These "point load" modules serve needs specifically fixed mobile telecommunications computing market, employing economical distributed power architectures. VPOL5A-5-SIP series provide precisely regulated output voltage range from 0.75 3.63 over wide range input voltage (Vi=3.0 Vdc) operate over ambient temperature range Ultra-high efficiency operation achieved through synchronous rectification drive control techniques. modules fully protected against short circuit overtemperature conditions. V-Infinity's world class automated manufacturing methods, together with extensive testing qualification program, ensure that VPOL5A-5-SIP series converters extremely reliable.
+VIN
ON/OFF
trim
TRIM
Figure Electrical Block Diagram
Thermal Packaging Physical Design.
VPOL5A-5-SIP series uses multi-layer construction. surface mount power components placed side PCB, low-power control components placed other side. Thus, heat dissipation power components optimized, ensuring that control components thermally stressed. converter open-frame product case case pin. open-frame design several advantages over encapsulated closed devices. Among these advantages are: Efficient Thermal Management: heat removed from heat generating components without heating more sensitive, small signal control components. Environmental: Lead free open-frame converters more easily recycled. Cost Efficient: encapsulation. Cost efficient open-frame construction. Reliable: Efficient cooling provided open frame construction offers high reliability easy diagnostics.
VPOL5A-5-SIP Converter Features
High efficiency topology, typically Industry standard footprint Wide ambient temperature range, -40C +85C Cost efficient open frame design Programmable output voltage external resistor from 0.75 3.63 minimum load requirement (Stable loads) Remote on/off Remote sense compensation Fixed switching frequency Continuous short-circuit protection over current protection Over-temperature protection (OTP) Monotonic startup with pre-bias output. UL/IEC/EN60950 Certified.
General Description
Electrical Description
block diagram VPOL5A-5-SIP Series converter shown Figure Extremely high efficiency power conversion achieved through synchronous rectification drive techniques. Essentially, powerful VPOL5A-5-SIP series topology based non-isolated synchronous buck converter. control loop optimized unconditional stability, fast transient response very tight line load regulation. typical pre-bias application VPOL5A-5-SIP series converters draw reverse current start-up. output voltage adjusted from 0.75 3.63vdc, using TRIM with external resistor. converter shut down remote on/off input that referenced ground. This input compatible with popular logic devices; 'positive' logic input supplied standard. Positive logic implies that converter enabled remote on/off input high floating), disabled low. converter also protected against over-temperature conditions. converter overloaded ambient temperature gets high, converter will shut down protect unit.
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
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PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
Technical Specifications
(All specifications typical nominal input, full load unless otherwise noted.) PARAMETER ABSOLUTE MAXIMUM RATINGS
Input Voltage Continuous Operating Temperature Thermal Considerations Section Storage Temperature
NOTES CONDITIONS
Device
Min.
Typical Max.
Units
+125
INPUT CHARACTERISTICS
Operating Input Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Maximum Input Current Vo,set Vin-0.5
Vin=0 Io=Io,max. Vo=0.75V Vo=1.2V Vo=1.5V Vo=1.8V Vo=2.0V Vo=2.5V Vo=3.3V Shutdown input idle current
No-Load Input Current
Converter Input Current Inrush Current Input Reflected-Ripple Current
thru inductor, 20MHz
OUTPUT CHARACTERISTIC
Output Voltage Point Output Voltage Trim Adjustment Range Output Voltage Regulation Load Regulation Line Regulation Temperature Coefficient Output Voltage Ripple Noise Peak-to-Peak External Capacitive Load Operating Output Current Range Output Current-Limit Inception Shout Circuit Protection Output Voltage =90% Nominal Output Voltage Continuous with Hiccup Mode Io=Io.min Io.max Vin=low line high line Ta=-40 20MHz bandwidth Full Load, ceramic tantalum Full Load, ceramic tantalum 3000 -0.5 -0.4 -0.03 +0.5 +0.4 +0.03 Vin=Nominal Io=Io.max, Tc=25 Selected external resistor -1.5% Vo,set +1.5% 0.75 3.63
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
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PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
PARAMETER DYNAMIC CHARACTERISTICS
Output Voltage Transient Response Error Brand Setting Time (within Vout nominal)
NOTES CONDITIONS
Device
Min.
Typical Max.
Units
Step Load Change, di/dt=0.1A/us Step Load Change, di/dt=0.1A/us
EFFICIENCY
Vo=0.75V Vo=1.2V Vo=1.5V Vo=1.8V Vo=2.0V Vo=2.5V Vo=3.3V Non-isolation Suffix Model 0.9x0.4x0.22 inches (22.9x10.16x5.6 0.8x0.45x0.24 inches(20.3x11.43x6.09
100% Load
ISOLATION CHARACTERISTICS
Input Output Standard Model Open Circuit Open Circuit Ion/off Von/off=0.0V Logic High, Von/off=14V Von/off 10%Vo,set Vin,min. 10%Vo,set 10%Vo,set 90%Vo,set hours grams
FEATURE CHARACTERISTICS
Switching Frequency On/Off Control, Positive Logic Remote On/Off Logic (Module Off) Logic High (Module On/Off Control, Negative Logic Remote On/Off Logic (Module Logic High (Module Off) on/off Current (for both remote on/off logic) Leakage Current (for both remote on/off logic) Turn-On Delay Rise Time Turn-On Delay Time, From On/Off Control Turn-On Delay Time, From Input Output Voltage Rise Time Over Temperature Protection
GENERAL SPECIFICATIONS
MTBF Weight Dimensions packages packages Io=100%of Io.max;Ta=25 MIL-HDBK217F
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
rev. page date
PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
Main Features Functions
Operating Temperature Range
V-Infinity's VPOL5A-5-SIP series converters highly efficient converter design resulted ability operate over wide ambient temperature environment consideration must given de-rating curves when ascertaining maximum power that drawn from converter. maximum power drawn influenced number factors, such Input voltage range. Output load current. velocity (forced natural convection). Mounting orientation converter with respect Airflow. Motherboard design, especially ground power planes. These effective heat sinks converter.
Over Current Protection
different voltage models have full continuous short-circuit protection. unit will auto recover once short circuit removed. provide otection fault condition, unit equipped with internal over-current protection. unit operates normally once fault condition removed. power module will supply 150% rated current. event over current converter will into hiccup mode protection.
Remote On/Off
remote on/off input feature converter allows external circuitry turn converter off. Active-high remote on/off available standard. VPOL5A-5-SIP series converters turned remote on/off high, left open floating. Setting
will turn converter off. signal level remote on/off input defined with respect ground. using remote on/off pin, leave open (module will on). part number suffix Negative remote on/off version. unit guaranteed over full temperature range this voltage level exceeds Vdc. converters turned on/off input left open. recommended remote on/off drive circuit shown figure
Over-Temperature Protection (OTP)
VPOL5A-5-SIP Series converters equipped with non-latching over-temperature protection. mperature sensor monitors temperature spot (typically, switch). temperature exceeds threshold (typical) converter will shut down, disabling output. When temperature decreased converter will automatically restart. over-temperature condition induced variety reasons such external overload condition system failure.
+Vin Remote On/Off
Output Voltage Adjustment
Section describes detail trim output voltage with respect point. output voltage models trimmable range 0.75 3.63 Vdc.
On/Off Control
Safe Operating Area (SOA)
Figure provides graphical representation Safe Operating Area (SOA) converter. This representation assumes ambient operating conditions such airflow thermal guidelines provided Sections 7.3.
Series
Common Common
Figure Positive Remote on/off Input Drive Circuit
+Vin
Vo,nom VOLTAGE
On/Off Control
Series
Remote On/Off Common Common
Safe Operating Area
Figure Negative Remote On/Off Input Drive Circuit
Io,max Io,CL CURRENT
UVLO (Under-Voltage Lockout)
voltage determines start operation Converter. When input rises exceeds about converter initiates soft start. UVLO function converter hysterosis (about 100mV) built provide noise immunity startup.
Figure Maximum Output Current Safe Operating Area
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
rev. page date
PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
Safety
Input Fusing Safety Considerations.
Agency Approvals: power supply shall submitted receive formal approval from following test agencies. 1.The power supply shall approved nationally recognized testing laboratory UL/CSA 60950 Edition (North America) EN60950 (International) Certificate from internationally recognized test house accordance with 60950. VPOL5A-5-SIP series converters have internal fuse. However, achieve maximum safety system protection, always input line fuse. safety agencies require time-delay fuse with maximum rating
76.2(3.0) Power Module
Tunnel Bakelite
25.4(1.0)
Applications
Layout Design Challenges.
optimizing thermal design utilized heat sink. Also some heat transferred from module main board through connecting pins. system designer user must ensure that other components metal vicinity VPOL5A-5-SIP series meet spacing requirements which system approved. resistance inductance layout traces norm should used where possible. consideration must also given proper impedance tracks between power module, input output grounds. recommended footprint shown figure
flow 12.7(0.5)
Thermocuple Location measuring ambient temperature airflow
Note Dimensions millimeters (inches)
Figure Thermal Test Setup
Thermal Considerations
power module operates variety thermal environments; however, sufficient cooling should provided help ensure reliable operation unit. Heat removed conduction, convection,
1.1mm PLATED THROUGH HOLE 1.6mm SIZE
0.20(5.1) LAYOUT TTERN VIEW 0.24(6.1)
radiation surrounding environment. thermal data presented based measurements taken set-up shown Figure7. Figures represent test data. Note that airflow parallel long axis module shown Figure7 VPOL5A-5-SIP. temperature either location should exceed output power module should exceed rated power module (VO, max). test setup shown Figure need solder 33mm 40.38mm(1.300'' 1.59'') test pcb. Note that airflow parallel long axis module shown Fig7.
Dimmension Inches(mm) Tolerance .XX= ±0.02 .XXX= ±0.010 0.25
Figure Recommended Footprint
Convection Requirements Cooling
predict proximate cooling needed module, refer Power De-rating curves Figures These derating curves approximations ambient temperatures airflows required keep power module temperature below maximum rating. Once module assembled actual system, module's temperature should checked shown Figure ensure does exceed 110°C. Proper cooling verified measuring power module's temperature Q1-pin shown Figure
Figure Temperature Measurement Location
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
rev. page date
PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
TYPICAL POWER DERATING 5Vin 3.3Vout
Output Current(A)
Ambient Temperature(
0LFM 100LFM 200LFM
Figure Typical Power De-rating 3.3Vout
NOTE:
specific input output derating curves available, please contact V-Infinity detail
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
rev. page date
PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
Efficiency Load Curves
VPOL5A-5-SIP Vo=3.3V (Eff
100% 100%
VPOL5A-5-SIP Vo=2.5V (Eff
Efficincy
Efficincy
4.5V 5.0V 5.5V
3.0V 5.0V 5.5V
Current Load
VPOL5A-5-SIP Vo=1.8V (Eff
100%
Current Load
VPOL5A-5-SIP Vo=1.5V (Eff
100%
Efficincy
Efficincy
3.0V 5.0V 5.5V
3.0V 5.0V 5.5V
Current Load
VPOL5A-5-SIP Vo=1.2V (Eff
100% 100%
Current Load
VPOL5A-5-SIP Vo=0.75V (Eff
Efficincy
Efficincy
3.0V 5.0V 5.5V
3.0V 5.0V 5.5V
Current Load
Current Load
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
rev. page date
PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
Input Capacitance Power Module
converters must connected source impedance. avoid proble with loop stability source inductance should low. Also, input capacitors should placed close converter input pins de-couple distribution inductance. However, external input capacitors chosen suitable ripple handling capability. polymers good choice. They have high capacitance, high ripple rating (typical <100mohm). Electrolytic capacitors should avoided. Circuit shown Figure represents typical measurement methods ripple current. Input reflected-ripple current measured with simulated source Inductance Current measured input module.
Power Supply
output voltage load value line regulation defined
Line.reg
100%
Where: output voltage maximum input voltage full load. output voltage minimum input voltage full load.
Current Meter
+Vin
+Sense
100uF
Voltage Meter
VPOL5A-5-SIP Series
Common Common
Load
Oscilloscope Power Supply 2*100uF Tantalum 220uF ESR<0.1ohm Common
Figure Input Reflected-Ripple Test Setup
+Vin
Figure VPOL5A-5-SIP Series Test Setup
VPOL5A-5-SIP
Test Set-Up
basic test set-up measure parameters such efficiency load regulation shown Figure Things note that this converter non-isolated, such input output share common ground. These grounds should connected together impedance ground plane application circuit. When testing converter bench set-up, ensure that -Vin connected together impedance short ensure proper efficiency load regulation measurements being made. When testing VInfinity's VPOL5A-5-SIP series under transient conditions please ensure that transient response source sufficient power equipment under test. calculate Efficiency Load regulation line regulation. value efficiency defined
Where:
100%
output voltage, output current, input voltage, input current.
value load regulation defined
Load .reg
100%
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
rev. page date
PART NUMBER: VPOL5A-5-SIP
DESCRIPTION: point load converter
VPOL5A-5-SIP Series Output Voltage Adustment.
output Voltage VPOL5A-5-SIPS33A adjusted range 0.75V 3.63V connecting single resistor motherboard (shown Rtrim) Figure 12v. Trim resistor connected output voltage defaults 0.75V
Output Ripple Noise Measurement
test set-up noise ripple measurements shown Figure coaxial cable with 50ohm termination used prevent impedance mismatch reflections disturbing noise readings higher frequencies5^
+Vin
+Vin
Trim
VPOL5A-5-SIP
10uF Tant.
Ceramic
R-Load Test Jack
VPOL5A-5-SIP
R-Load trim-up
Common Common
Common
Common
Figure Output Voltage Ripple Noise Measurement Set-Up
Figure Trim-up Voltage Setup
value Rtrim-up defined
7.10 Output Capacitance
V-Infinity's VPOL5A-5-SIP series converters provide unconditional stability with without external capacitors. good transient response output capacitors should located close point load. high current applications point already been made layout considerations resistance inductance tracks. Output capacitors with associated values have impact loop stability bandwidth. V-Infinity's converters designed work with load capacitance up-to 3,000 ommended that additional capacitance, Maximum 3,000 ESR,
21070 Rtrim 5110 0.75
Where: Rtrim-up external resistor ohm, desired output voltage give mple above calculation, voltage Vdc, Rtrim given
Rtrim
Rtrim 3153
21070 5110 0.75
connected close point load outside remote compensation point.
Mechanical Outline Diagrams
SIP/SMT05 Mechanical Outline Diagrams
Dimensions millimeters inches Tolerance: x.xx ±0.02 (0.5mm) x.xxx ±0.010 (0.25 unless otherwise noted
various output values various resistors calculated provided Table nvenience.
Vo,set 0.75 1.20 1.50 1.80 2.00 2.50 3.30 3.63
Rtrim (Kohm) Open 41.71 22.98 14.96 11.75 6.93 3.15 2.20
SIZE SIP05
0.90(22.9) 0.22(5.6)Max.
CONNECTION FUNCTION +Output Trim Common Input On/Off
0.14(3.6)
0.400(10.16)
Table Trim Resistor Values
0.100(2.54) 0.200(5.08) 0.700(17.78) 0.800(20.32)
0.025(0.64)
0.025(0.64) 0.19(4.7)
Figure VPOL5A-5-SIP Mechanical Outline Diagram
20050 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 503.612.2382
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