NCP11187A65P45WGEVB ONSEMI | Alldatasheet

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© Semiconductor Components Industries, LLC, 2020 August, 2020 − Rev. 1

1 Publication Order Number:

45 W Auxiliary Power

Supply for White Goods and Industrial Equipment with NCP11187A65 GENARAL SPECIFICATIONS Devices Applications Topology Output Power Input Voltage Output Spec. NCP11187A65 White Goods and Industrial Power Supplies Isolated Flyback 45 W 85–265 Vac 12 V/3.5 A 16 V/0.2 A Efficiency Standby Power Package Temperature Operating Temperature Cooling Method Board Size > 88% @ Full−load < 50 mW @ 230 Vac 90°C 0–50°C Natural Convection In Open Frame 145 x 60 x 30 mm

2.83 W/inch3

Description

This user’s manual introduces not only performance of a reference design with 45 W isolated flyback converter using NCP11187 for auxiliary power supplies but also provides key experimental results and information. NCP1118x is a highly enhanced switcher integrating a peak current mode PWM controller employing mWSaver/C0116 and frequency reduction technology and a highly robust 800 V Super −junction II MOSFET. Additionally, it features a high −voltage startup circuit, frequency reduction, slope compensation, constant output power limit, and highly reliable and various protections. As a results, it allows designing cost−effective off−line power supplies using NCP1118x with less BOM counts and smaller PCB size and high efficiency as well. Additionally, it could get low standby power consumption less than typically 50 mW despite of multiple outputs. On top of that, NCP1118x features variety of protections for highly reliable power supply design such as a feedback pin open −loop protection (OLP), current −sense resistor short protection (CSSP), brown −out, line over −voltage protection (Line−OVP) using an line voltage sensing pin operated with auto −recovery operation and constant over−power protection. This user’s manual demonstrates those protections under various conditions. Key Features

  • Peak Current Mode Controller Integrated 800 V SJ −II MOSFET, High V oltage Start−up, Soft−Start, and Slope Compensation
  • mWSaver Technology Provides Industry’s Best−in−Class Standby Power
  • Switching Frequency Option: 65/100/130 kHz
  • Proprietary Asynchronous Frequency Hopping Technique for Low EMI
  • Programmable Constant Output Power Limit for Entire Input V oltage Range
  • Precise Brown −out Protection and Line Over −voltage Protection (LOVP) with Hysteresis
  • Current Sense Short Protection (CSSP) and Abnormal Over−Current Protection (AOCP)
  • Thermal Shutdown (TSD) with Hysteresis
  • All Protections Operated by Auto −recovery: VCC Under−voltage Lockout (UVLO), Feedback Open−Loop Protection (OLP), VCC Over−V oltage Protection (OVP) EVAL BOARD USER’S MANUAL www.onsemi.com

Figure 1. Reference Board Schematic

www.onsemi.com This reference board comprises four parts overall, EMI filter, primary side control, secondary output and feedback circuit part. For more detail, these parts could be described as following. 1. EMI filter is formed by components of a common−mode filter LF101, X −capacitors CX101 and CX102, and Y−capacitor CY101. 2. Primary side control part in flyback converter consists of NCP11187 switcher U101, a power transformer T201, a bulk capacitor C101, a full−wave rectifier BD101, a snubber circuit ZD101 and D101 and line input voltage sensing R101~R103, R112 and C106. Additionally, V CC bias is powered for from the auxiliary winding of T201 and related components of D102, C104 and C105 during normal operations. The resistor array of R106~R110 is for drain current sensing resistor and connected to CS pin. The sensed drain current is used in peak current mode control and some protections e.g. pulse−by−pulse current limit, AOCP (Abnormal Over−current Limit) and CSSP (Current −sensing Short Protection) and etc. In this reference board, TVS (Transient V oltage Suppressor) is utilized for a snubber to suppress voltage spike produced by leakage inductance at MOSFET turn −off. Optionally, RCD snubber can be used since component places of R104, R105 and C102 is already assigned, if needed. Meanwhile, C106 is used to decouple high frequency switching noise from line sensing signals. It is typically 1nF~3.3 nF in this sensing method, but should be adjusted considering real noises in an actual experiment. 3. Secondary side output stage has two output terminals (12 V/3.5 A and 16 V/0.2 A) and associated components such as output diodes D201, D202, output capacitors C202~C204, C206, C207 with filter inductors L201, L202, and RC snubber R201, C201, R203, C205 for the output diodes. The output capacitors and filter inductors are formed as pi−type filter to reduce output voltage ripple while rejecting high frequency switching noise. 4. Feedback circuit at the secondary side employs dual feedback circuit with two poles & one zero to increase feedback loop response and reduce voltage variation on the unregulated output voltage caused by cross −regulation depending on load variation. Main regulated output is 12 V −output thought feedback circuits of resistors R208, R211, R212 and R205, a voltage reference U202 and an opto−coupler U201. The 16 V−output voltage can be also sensed and affect feedback loop with low weight though R209 and R210. R207 and C208 provides one pole and zero and should be adjusted considering feedback response in an actual experiment.

  • Transformer Overall Specification Value Note Core PQ2625 TDK Bobbin PQ2625 bobbin SUMMITOMO BAKELITE CO LTD Primary−side inductance 940 /C0109H (typ) Measure pin 1 to 3 @ 100 kHz & 1 V Leakage inductance 6 /C0109H Short all pin except primary−side winding
  • Transformer Overall Specification

Figure 6. Transformer Specification

  • Transformer Winding Method Order Winding Name Wire − Diameter Number of Strands Start − Finish Turns Insulation Tape Turns 1 Np UEW − φ 0.45 1 1−2 24 1TS 2 N12V TIW − φ 0.4 3 7−9 7 1TS 3 N12V TIW − φ 0.4 3 8−10 7 1TS 4 N16V TIW − φ 0.25 1 11−12 2 1TS 5 NAux TIW − φ 0.2 1 6−5 8 1TS 6 Np UEW − φ 0.45 1 2−3 24 1TS

www.onsemi.com KEY OPERATIONS OF EVB Nomenclature Name Description VAC Line Input Voltage VD Drain Voltage ID Drain Current VCC VCC Pin Voltage VFB Feedback Voltage VLINE Line Pin Voltage VO−12V 12 V Output Voltage VO−15V 15 V Output voltage tstartup Time from when the AC switch is turned on until the output voltage reaches 90% fs Operation Frequency VFB−BUR Burst−mode Start Threshold Voltage VFB−BURH Burst−mode End Threshold Voltage tD−VNOFF Brown−out Debounce Time NVINOVP VIN OVP Debounce Counting Number tD−OLP FB OLP Debounce Time NCSSP CSSP Debounce Counting Number Operation Contents 1. Startup Operation 2. Normal Operation 3. Output Ripple V oltage 4. Burst Mode In/Out 5. Load Transient a. Load Change: 20% → 80% b. Load Change: 80% → 20% 6. Protection a. Brown Out b. Line Over V oltage Protection (LOVP) c. Vcc Over V oltage Protection (OVP) d. Over Load Protection (OLP) e. Current Sense Short Protection (CSSP) − Startup at sensing resistor short − Short sensing resistor during normal operation f. Thermal Shutdown Protection (TSD)

Figure 19. Output Ripple Voltage @230 VAC/60 Hz, Full Load

Table 1. BILL OF MATERIALS

3 Electrolytic

2 Electrolytic

3 Resistor SMD 10 M/C0087 ±1% 1206 Rohm

2 Resistor SMD 130 /C0087 ±1% 1206 Rohm

2 Resistor SMD 82 /C0087 ±1% 1206 Rohm

Table 1. BILL OF MATERIALS (continued)

2 Super Fast

1000 V, 1 A SMB ON Semiconductor MURS160T3G

200 V, 20 A TO−220 ON Semiconductor MBR20200CT

150 V, 10 A TO−277 ON Semiconductor FSV10150V

600 V, 6 A GBU 6J ON Semiconductor GBU6J

250 Vac, 2 A SS−5 Little fuse 392 1200 0000

All brand names and product names appearing in this document are registered trademarks or trademarks of their respective holders.

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