Transcript
DN05074/D
Design Note – DN05074/D
Universal AC Input, 5.3V2A Output, 10.6 Watt Charger Device NCP1365BBCC
Application
Input Voltage
Output Power
Topology
I/O Isolation
Mobile, tablet Charger, adapter
90 to 264 Vac
10.6W
Quasi Resonant Flyback
Yes
Item Rated Input Voltage Input Voltage Range Input Frequency Range Inrush Current Average Efficiency Average Eff. At cable end Standby Power Output Voltage Output Current Rated Output Power Ripple and Noise Rise Time Startup Time Over Shoot Transient Response
Output Specification 100Vac~240Vac 90Vac~264Vac 47Hz~63Hz <30A >82% >78% <30mW 5V~5.5V, 5.3V at 2A 2A >10.6W <120mV <30ms <1.5s <6.4V 4.5V~5.5V
Circuit Description This design note describes a 10.6 watt, universal AC input, isolated Quasi-Resonant flyback converter for smart phone, tablet charger and smart socket power supply etc. The featured power supply is a primary side constant voltage and current regulation utilizing ON semiconductor’s new NCP1365 current mode controller which is in SO8 package. This Design Note provides the complete circuit schematic details, layout, test data and BOM for 5.3 volts, 2 amps power supply. 1. Input circuit Rectifier, filter and EMC circuit formed by D1, C1, C1, L1, NTC is 2.5ohm negative temperature coefficient resistor to provide inrush protection, FR1 provides short-circuit protection when large AC input current occurs.
April 2015, Rev. 0
Test Condition
264Vac and 2A load Measured at board end Measured at cable end 90Vac~264Vac 90Vac~264Vac and 0~2A 90Vac~264Vac 90Vac~264Vac 90Vac~264Vac, 1uF+0.1uF CAP@E-load At No/Full load,115Vac&230Vac 90Vac~264Vac and 0~2A At 1m USB cable end 0.1A-1.9A, 0.25A/us,10ms cycle
2. NCP1365 control circuit NCP1365 integrates a high voltage startup current source, so pin8 can be connected to high voltage rail directly or via a resistor. R8, and R9 consists of voltage simple network to set output voltage, C12 is a delayed capacitor to delay switching on to valley. R12 and R13 is a current sensing resistor to decide how much current can be set, R10 and CS pin parasitic capacitor consists of a filter to filter current spike. R19, C11 and C9 consist of a type II compensation network to provide voltage feedback control loop compensation. R4, D6 and C4 consist of Vcc supply circuit, R4 can adjust Vcc voltage and also prevent D6 from a inrush current. An RCD-R clamp consisting of D5, R3, R6, and C7 limits drain voltage spikes caused by leakage inductance, resistor R6 has a relatively large
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DN05074/D value to prevent any excessive ringing on the drain voltage waveform and R3 can limit the reverse recovery current through D5. 3. Output rectification and filter The transformer (T1) secondary is rectified by D2, a Schottky barrier-type diode (chosen for higher efficiency), and filtered by C3, C5 and C8. In this application, C3 and C5 have Sufficiently low ESR characteristics to allow meeting the output voltage ripple requirement Without adding an LC post filter. C6 and R7 are snubber network of D2 to eliminate excessive ringing on secondary voltage waveform. R14 is a dummy load to prevent output voltage rising at no load.
Key Features
Primary Side Regulation (PSR) CC/CV control Quasi-Resonant current mode control with Valley Switching Valley lockout avoids audible noise at valley jumping operation Integrated 560V High voltage startup current source Built in 4ms soft start 110kHz maximum clamp frequency operation Adjustable voltage control loop compensation 300mV cable drop compensation Wide Operation VCC range (up to 30 V) Cycle by cycle current limit Built in Vcc OVP (typical 26v) Built in output UVP in CC mode (3V+/6.7%) Output OCP, SCP, OVP and controller OTP function CS pin open and short protection Vs pin open and short protection Meet COC V5 Tier 2 100pF Y capacitor “Travel Adapter” (TA) form factor Size: 47mm x 34mm x 15mm
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Circuit Schematic
PCB layout
Demoboard Photo
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Standby Power at No Load 30 27.5 25 22.5
Pin(mW)
20 17.5 15 12.5 10 7.5 5 2.5 0 90
115
132
180
230
264
230
264
Vac
Average Efficiency Between 25%, 50%, 75% and 100% Load 85 84.5 84
Efficiency(%)
83.5 83 82.5 82 81.5 81 80.5 80 90
115
132
180 Vac
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Efficiency Vs Load Curves 87.5 85
Efficiency(%)
82.5 80
115Vac 230Vac
77.5
90Vac 264Vac
75 72.5 70 0.1
0.2
0.5
1
1.5
2
Io(A)
I-V Curves 6 5.5 5 4.5 4
Vo(V)
3.5
115Vac
3
230Vac
2.5
90Vac
2
264Vac
1.5 1 0.5 0 0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
Io(A)
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Output Ripple Voltage (Test condition: tested at E-load with 1m cable, 1uF E-CAP and 0.1uF ceramic in parallel)
90Vac and 2A load
115Vac and 2A load
230Vac and 0.5A load
264Vac and 0.5A load
Transient Response
Test Condition: 0.2A-1.8A, 250mA/us 10ms cycle, 115Vac April 2015, Rev. 0
Test Condition: 0.1A-1.9A, 250mA/us 10ms cycle, 115Vac
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OVP
SCP
Test condition: 264Vac, no dummy load
Test condition: SC at board end
Startup Time
115Vac and 2A CC load
230Vac and 2A CC load
Output Voltage Rise Time
115Vac and 2A CC load April 2015, Rev. 0
230Vac and 2A CC load www.onsemi.com
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Output Voltage Overshoot
115Vac and no load
115Vac and 2A CC load
MOSFET Drain Voltage
Startup at 264Vac and 2A CC load Inrush Current
Working at 264Vac and 2A CC load Secondary Diode Reverse Voltage
264Vac and 2A CC load April 2015, Rev. 0
264Vac and 2A CC load www.onsemi.com
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BOM Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
Qty Referen Type 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1
C8 C6 C9 C10 C12 C11 C4 C7 D1 D2 D5 D4 D6 T1 FR1 U1 Q1 NTC L1 R8 R10 R4 R9 R15 R19 R2 R12 R13 R3 R7 R6 R14 R18 C1-2 C3 C5 J1
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Part Name
MFR
Value
Ceramic Std std 0.1uF,50V Ceramic Std std 1000pF,50V Ceramic Std std 100pF,50V 100pF,Y1 CS65-B2GA101KYN TDK Ceramic Capcitor Ceramic Std std 10pF,50V Ceramic Std std 33nF,50V Ceramic C2012X7R1E475K TDK 4.7uF,25V Ceramic C3216C0G2J471J TDK 470pF,630V Bridge rectifier LMB6S FSC/Others 1A,600V MBR2045MFS/FERD ON/ST 20A,45V Schotty rectifier Standard rectifier DFLR1600 Diodes 1A,600V ON 0.2A,200V Switching diode BAS20HT1G Transformer EI16/12/8 Customized transformer Micro Fuse 20T-016H Hollyfuse 1.6A,250Vac PSR Controller NCP1365BBCC ON NMOSFET SW6N70 SAMWIN 6A, 700V NTC SPNL07D2R5MBI Sunlord 2.5ohm Axial leaded fixed in 7447462221 Wurth 220uH Resistor Std Std 100K Resistor Std Std 1K Resistor Std Std 22 Resistor Std Std 30.9K Resistor Std Std 47 Resistor Std Std 82k Resistor Std Std NA Resistor Std Std 1.6 Resistor Std Std 1.8 Resistor Std Std 150 Resistor Std Std 20 Resistor Std Std 330k Resistor Std Std 1.6k Resistor Std Std 1M Electrolytic capacitorAX/KSH106M400T1 Rubycon/TEAP 10uF,400V Electrolytic solid capPCH477M6R3S1AGE TEAPO 470uF,6.3V USB connector std www.onsemi.com
Package
Description
603 603 603 Lead type 603 603 805 1206 Micro-DIP SO8FL POWERDI123 SOD323 TH type Axial lead SO8 IPAK lead type
Capacitor, Ceramic, 10% Capacitor, Ceramic, 10% Capacitor, Ceramic, 10% safety standard approved, 10% Capacitor, Ceramic, 10% Capacitor, Ceramic, 10% Capacitor, Ceramic, Chip, 10% Capacitor, Ceramic, Chip, 5% Bridge Rectifier, 600V, 1A Schotty, 20A, 45V/30A,50V Standard Rectifier, 1A, 600V Switching diode, SMD EI16/12/8,10pin bobbin Micro fuse, 1.6A,250V PSR Controller with HV Startup NMOS, 6A, 600V, IPAK NTC, 2.5ohm,3A Axial leaded fixed inductor 805 Resistor, Chip,1/5W, 1% 603 Resistor, Chip, 1/8W, 1% 603 Resistor, Chip, 1/8W, 1% 603 Resistor, Chip, 1/8W, 1% 603 Resistor, Chip, 1/8W, 1% 603 Resistor, Chip, 1/8W, 1% 603 Resistor, Chip, 1/8W, 1%, 805 Resistor, Chip, 1/5W, 1% 805 Resistor, Chip, 1/5W, 1% 1206 Resistor, Chip, 1/4W, 1% 805 Resistor, Chip, 1/5W, 1% 1206 Resistor, Chip, 1/4W, 1% 603 Resistor, Chip, 1/8W, 1% 603 Resistor, Chip, 1/8W, 1% 10mm(die.)x12size,10mmx12.5mm 6.3mm(die.)x8size, 6.3mmx8mm USB connector, Type a 9
DN05074/D
References ON Semiconductor datasheet for NCP1360/5 CC/CV primary side PWM current mode controller.
Disclaimer: ON Semiconductor is providing this design note “AS IS” and does not assume any liability arising from its use; nor does ON Semiconductor convey any license to its or any third party’s intellectual property rights. This document is provided only to assist customers in evaluation of the referenced circuit implementation and the recipient assumes all liability and risk associated with its use, including, but not limited to, compliance with all regulatory standards. ON Semiconductor may change any of its products at any time, without notice.
Design note created by David Dou; e-mail:
[email protected]
April 2015, Rev. 0
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