present report depicts demonstration board built around NCP1013P06, mo

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present report depicts demonstration board built around NCP1013P06, mo

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AND8142/D W/12 Universal Mains Adapter with NCP101X
present report depicts demonstration board built around NCP1013P06, monolithic high-voltage switcher. Delivering from VAC, board complies with testing CISPR0022 offers ability either Dynamic Self-Supply auxiliary winding. With this latter, converter passes less than no-load situation VAC. Schematic Description Figure portrays board application schematic whose heart powered NCP1013 operating kHz. This frequency selected passing CISPR0022 specification (that starts kHz) more easily reducing switching losses. from Figure jumper exists offers ability disconnect Dynamic Self-Supply (DSS): when left open, powers controller introduces frequency jittering thanks ripple injected inside circuit. also offers precise short-circuit trip point since decision taken independently loosely coupled auxiliary winding. input power consumption directly current needed power controller multiplied rectified bulk voltage. assume average controller current bulk level VDC, input power will around no-load situation. jumper place, disconnects itself standby power reduces below Precise numbers given summary table this document. network safely clamps maximum drain excursion below highest mains conditions, e.g. Vbulk small capacitor decouples ground prevents noise from coupling inside controller. resistor series with auxiliary winding limits current active clamp, case auxiliary winding connected. Please note that this option enables optocoupler fail-safe protection: loop gets accidentally opened, grows-up imposes abnormal current into pin. internal circuitry detects controller fully latched-off. user must unplug converter from mains until collapses below reset internal logic blocks. Practical Measurements Some typical measurements detailed below highlight impact between auxiliary winding implementation. measurements were carried 25°C operating temperature.
Standby Power
When load removed, becomes possible measure power absorbed demoboard both operating modes, auxiliary winding. required converter warm minutes before recording numbers: DSS: VDC, Iout VDC, Iout Aux.: VDC, Iout VDC, Iout slight difference low/high numbers with auxiliary winding startup leakage current mA), although very low, this number decreases junction heats (the internal controller consumption too). With VDC, temperature slightly higher than with explains minor difference.
Semiconductor Components Industries, LLC, 2004
January, 2004 Rev.
Publication Order Number: AND8142/D
1N4148
R_L322
Supply Jumper Off: Activated Aux. Winding
mF/35
MBRS360T3
0.85 mF/16
Figure Electrical Schematic Power Supply
A9619-C MUR160
mF/16
2x15 Schaffner RN112-06/2
Universal Input
NCP1013P06 mF/16 SFH615A-2
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AND8142/D
TLV431 Type
AND8142/D
Efficiency Output Voltage Versus Output Current
directly drawing current from rectified rail drain pin, average consumption permanently present (though lowered when skip activated) slightly degrades efficiency light loads output power. Nevertheless, efficiency still above output power. Figures portray efficiency evolution both input voltages with either auxiliary winding.
EFFICIENCY OUTPUT POWER
Using auxiliary winding makes difference ability power supply detect over current condition. Both versions will protected against real short-circuits (Rload will naturally offer improved performance when precision trip point needed. This mainly poor coupling between auxiliary winding power winding which prevents proper collapsing when Vout goes low. Also, built-in forces grow auxiliary voltage, which does play favor either.
OUTPUT VOLTAGE OUTPUT CURRENT
Figure Efficiency Power, Efficiency High Input Line
EFFICIENCY OUTPUT POWER
Figure Vout Iout (330 Vdc) Offers Better Performance Detect Overcurrent Condition
Operating Curves important check that critical parameters well within control before releasing board production. Following some curves captured demonstration board with their individual comments.
Figure Efficiency Power, Efficiency Input Line
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AND8142/D
Drain-Source Waveform
Vds(t)
Figure Drain-Source Voltage Captured with Maximum Output Power
This shot been taken just before maximum current trip point reached. corresponds highest peak power largest reflected voltage drain. This event also occurs during start-up sequence, just before
loop closed (e.g. Vout reaches target). displayed level gives sufficient room when compared internal MOSFET BVdss
Feedback Loop Closure
Loop closed here
Error checked here
Figure Important Check Safe Start-Up Sequence
power-on, controller delivers maximum peak current. During this time, error flag internally raised, signalling that power supply reached maximum peak limit. fault management circuitry consists checking presence this flag every time ripple comes down error flag activated
this time, controller considers presence fault triggers protective burst mode. result, since capacitor must sized give enough room Vout reach target before ripple touches setpoint. Worse case corresponds maximum output power, e.g. case.
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Short-Circuit Protection
Figure Short-Circuit Occurred, Controller Enters Burst-Mode
explained above, when internal check reveals that error flag raised, controller stops pulsing reduces consumption. thus falls down until another lower level reached (VCClatch) where
start-up source re-activated start-up attempt made. This auto-recovery system: fault fades away, power supply resumes operation.
Optocoupler Fail-Safe Protection
Unloaded
Vout
Loaded
Figure Fail-Safe Optocoupler Protection Triggered Short Secondary
When feedback loop broken, auxiliary output voltages away. When supplied auxiliary winding (jumper on), internal circuitry clamps typical kind active zener diode). When auxiliary level runs away, pushes more current into active zener. this current exceeds given level, circuit
fully latches activity stopped. keeps going down, power supply permanently stopped. user needs reset controller unplugging converter have falling down below where latch reset.
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AND8142/D
Fault Margin
Normal Startup
Vaux
Figure It's also important that start-up overshoots have luck trigger fail-safe circuitry.
capacitor connected over TL431 offers pure integral compensation. Despite simplicity, this kind capacitive network engender start-up overshoots. overshoot low, this board, there problem. However, important check that, again, sufficient margin exists between normal start-up real fault detection. this margin small, there risks that
supply gets latched start-up. Figure confirms adequate margin with demo. Playing will offer reduction overvoltage level, affect margin well standby consumption (e.g. active zener turned standby, more difficult below mW).
Conducted Sweeps
Figure When Jittering Active
Figure Winding Deactivates Jittering
Figures portray conducted sweeps captured VAC. nice spreading effect frequency sweep Figure where high-frequency noise artificially reduced: naturally offers more margin pass limit. When auxiliary
winding place, disconnects frequency sweep. Nevertheless, power supply still passes limit. Figures show same plots when converter powered from input source. effects also visible Figure
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AND8142/D
Conducted Sweeps
Figure When Frequency Jitters
Figure Winding Stops Jittering
Stability Check pulsing converter output, becomes possible detect oscillations converter reacts.
Figure shows stable results high line, 100% current excursion.
High Line
Line
Figure Pulsing Output Current Confirms Stability Both High Line Conditions
Increasing Output Power current demonstration board supplied with Coilcraft A9619-C transformer featuring primary inductance This device allows output power continuous 70°C ambient temperature. However, with same board, possible raise output power application. Plug another transformer, Coilcraft B0570-B that features primary inductor whose turn ratio higher. pinout compatible with PCB, thus easy wire
Replace NCP1013P06 NCP1013P10, version. Replace resistor (R7) kW/2.0 value. rest kept unchanged. Please note that board able deliver output power. Experiments have shown that NCP1013P10 layout improved (more copper area), board experimentally deliver continuous power 60°C ambient temperature.
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AND8142/D
Conclusion This board shows build, test reliability, power supply made around NCP101X device. Despite DIP8 package, converter used variety applications ranging from auxiliary power supplies watts converters. Once chip specification understood, becomes child's play make work!
Universal Mains NCP101X Demonstration Board Part List
Reference R_L3 Feet Value V/1.0 MBRS360T3 MUR160 1N4148 nF/X2 mF/400 mF/16 nF/25 mF/16 mF/16 mF/16 nF/400 nF/10 mF/35 SFH615A-2 TLV431ALP NCP1013P06 A9619-C Connector Connector Connector Jumper Shunts Board Feet Part Number 2322 13154 RN112-0.6/02 DF08M 2222 5224 ECA2GM470 ECA1CM470 WKP222MCMBFOK ECA1CM471 ECA1CM471 ECA1CM470 R82MC1220DQ02J ECA1VM470 PX0786/PC L145202010002 4710334140400 LCBS-TF-M4-6-01 Manufacturer Comp. Schaffner Wurth Elect. General Semiconductor Semiconductor Semiconductor Comp. Panasonic Panasonic Vishay Panasonic Panasonic Panasonic Arcotronics Panasonic Siemens Semiconductor Semiconductor Coilcraft Bulgin Kontek Richco Comment Thru Holes 1206 Wired Thru Holes 1206 PRO1 Thru Holes Thru Holes Replaces Mode Filter Wired DIP8 Type Axial Axial Type Radial 1206 Radial Radial Radial 1206 Radial Wired TO92 DIP8 Mains Inlet Output Height
Coilcraft 1102 Silver Lake Road Cary 60013 Tel. 800-322-2645 Tel. (WW) 847-639-6400
Fax: 847-639-1469 www.coilcraft.com www.coilcraft.com.cn email: info@coilcraft.com
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AND8142/D
Figure Layout Component Views http://onsemi.com
AND8142/D
Semiconductor registered trademarks Semiconductor Components Industries, (SCILLC). SCILLC reserves right make changes without further notice products herein. SCILLC makes warranty, representation guarantee regarding suitability products particular purpose, does SCILLC assume liability arising application product circuit, specifically disclaims liability, including without limitation special, consequential incidental damages. "Typical" parameters which provided SCILLC data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. SCILLC does convey license under patent rights rights others. SCILLC products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure SCILLC product could create situation where personal injury death occur. Should Buyer purchase SCILLC products such unintended unauthorized application, Buyer shall indemnify hold SCILLC officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that SCILLC negligent regarding design manufacture part. SCILLC Equal Opportunity/Affirmative Action Employer. This literature subject applicable copyright laws resale manner.
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AND8142/D

present report depicts demonstration board built around NCP1013P06, mo

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