UM10529 TEA1721AT 5 W GreenChip SP small-size demo board Rev. 1 — 29 May 2012 User manual Document information Info Content Keywords TEA1721AT, ultra-low standby power, constant output voltage, constant output current, primary sensing, integrated high-voltage switch, integrated high-voltage start-up, USB charger, 5 V/1 A supply Abstract This user manual describes a 5 W Constant Voltage (CV) or Constant Current (CC) universal input power supply for mobile phone adapters and chargers. This demo board is based on the GreenChip SP TEA1721AT. GreenChip SP TEA1721AT enables low no-load power consumption <10 mW. The TEA1721AT design ensures a low external component count for cost-effective applications. In addition, the TEA1721AT provides advanced control modes for optimal performance. The TEA1721AT integrates the 700 V power MOSFET switch and SMPS controller. UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board Revision history Rev Date Description v.1 20120529 first issue Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 2 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 1. Introduction WARNING Lethal voltage and fire ignition hazard The non-insulated high voltages that are present when operating this product, constitute a risk of electric shock, personal injury, death and/or ignition of fire. This product is intended for evaluation purposes only. It shall be operated in a designated test area by personnel qualified according to local requirements and labor laws to work with non-insulated mains voltages and high-voltage circuits. This product shall never be operated unattended. This User Manual describes a 5 W Constant Voltage (CV) or Constant Current (CC) universal input power supply for mobile phone adapters and chargers. This demo board is based on the TEA1721AT GreenChip SP. The TEA1721AT GreenChip SP provides ultra-low <20 mW, no-load power consumption without using additional external components. Designs are cost-effective using the TEA1721AT GreenChip SP because only a few external components are needed in a typical application. In addition, the TEA1721AT provides advanced control modes for optimal performance. The TEA1721AT integrates the 700 V power MOSFET switch and SMPS controller. Remark: All voltages are in V (AC) unless otherwise stated 2. Safety Warning The complete demo board application is AC mains voltage powered. Avoid touching the board when power is applied. An isolated housing is obligatory when used in uncontrolled, non-laboratory environments. Always provide galvanic isolation of the mains phase using a variable transformer. The following symbols identify isolated and non-isolated devices. 019aab174 019aab173 a. Isolated. Fig 1. UM10529 User manual b. Non-isolated Isolated and non-isolated symbols All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 3 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 3. Features • • • • • • • • • • • • • • Enables low no-load power dissipation <10 mW Low component count for a cost-effective design Advanced control modes for optimal performance SMPS controller with integrated power MOSFET switch 700 V high-voltage power switch for global mains operation Primary sensing at end-of-conduction for accurate output voltage control Avoids audible noise in all operation modes Compensation of cable impedance included Jitter function for reduced EMI USB battery charging and Energy Star compliant Universal mains input Isolated output Highly efficient: >77 % OverTemperature Protection (OTP) 4. Technical specification Table 1. Input and output specification Parameter Condition Value Remark universal AC mains Input Input voltage - 90 V to 265 V Input frequency - 47 Hz to 63 Hz Average power dissipation no-load 7.85 mW average of 115 V and 230 V Output UM10529 User manual Output voltage - 5.0 V - Maximum output current - 1.0 A - Maximum output power - 5.0 W - All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 4 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board a. Top view b. Bottom view Fig 2. UM10529 User manual TEA1721AT 5 W demo board All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 5 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 5. performance data 5.1 No-load Input power dissipation No-load Input power dissipation[1] Table 2. Output voltage Conditions Power dissipation Unit 5.0 V 115 V; 60 Hz 7.3 mW 5.0 V 230 V; 50 Hz 8.4 mW [1] The no-load input power has been measured after 20 minutes warm-up time. Fig 3. No-load Input power dissipation 5.2 Output voltage and efficiency performance data Table 3 and Figure 4 show the measured efficiency figures and VI characteristics of the GreenChip SP TEA1721AT demo board. The efficiency and VI characteristics have been measured after 20 minutes warm-up time. Efficiency and VI characteristics[1] Table 3. VCC Parameter 115 V output current (A) 0.00 0.02 0.03 0.05 0.1 output voltage (V) 5.10 5.08 5.05 5.04 5.00 4.99 4.99 5.00 5.01 5.02 5.03 5.05 5.06 5.07 input power (W) 0.0073 0.17 0.23 0.35 0.65 1.27 1.90 2.53 3.18 3.83 4.50 5.15 5.80 6.48 efficiency (%) - 230 V [1] Values - - - 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 75.2 78.1 78.4 78.5 78.4 78.4 78.3 78.3 78.3 78.3 output current (A) 0.00 0.02 0.03 0.05 0.1 output voltage (V) 5.09 5.09 5.08 5.05 5.01 4.99 4.99 4.99 5.01 5.02 5.03 5.04 5.05 5.06 input power (W) 0.0084 0.18 0.29 0.43 0.73 1.34 1.95 2.55 3.20 3.84 4.48 5.15 5.78 6.44 efficiency (%) - - - - 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 67.0 74.2 76.5 77.8 78.2 78.2 78.3 78.3 78.4 78.4 The no-load input power has been measured after 20 minutes warm-up time. UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 6 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board (1) efficiency at 115 V (2) efficiency at 230 V Fig 4. Efficiency at 115 V and 230 V (1) 85 V (2) 115 V (3) 230 V (4) 265 V Fig 5. UM10529 User manual VI characteristics at 85 V, 115 V, 230 V and 265 V All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 7 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 5.3 Dynamic loading from 0 A to 0.5 A The dynamic loading was tested according to the USB-charger specification 1.1. At a load step of 0 A to 0.5 A, the output voltage must stay above 4.1 V. Due to primary sensing, the TEA1721AT detects the load step only after the next switching cycle. The load step is measured at Vmains = 230 V. The output capacitors (C5 and C6) are 1000 F/6.3 V (see Table 4). The burst frequency is 430 Hz. CH1 = VDRAIN CH3 = Io CH4 = Vo Fig 6. Load step 0 A to 0.5 A In the worst case (see Figure 6), the output voltage drops to 4.38 V which fulfills the USB-charger specification 1.1. UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 8 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 5.4 Dynamic loading from 0.5 A to 0 A The dynamic loading was tested according to the USB-charger specification 1.1. At a load step of 0.5 A to 0 A, the output voltage must stay below 6.0 V. Due to primary sensing, the TEA1721AT detects the load step only after the next switching cycle. The load step is measured at Vmains = 230 V. The output capacitors (C5 and C6) are 1000 F/6.3 V (see Table 4). The burst frequency is 430 Hz. CH1 = VDRAIN CH3 = Io CH4 = Vo Fig 7. Load step 0.5 A to 0 A After the load step from 0.5 A to 0 A, the output voltage rises from 5.0 V to 5.26 V. Due to the large electrolytic output capacitors (2 1000 F), the transition takes about 2 ms and the controller switches from CV to CVB. UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 9 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 5.5 Short-circuit of the output The output of the demo board can be short-circuited without damaging of any component. Figure 8 shows the behavior of the converter when the output is short-circuited. During short-circuit of the output, the VCC voltage (CH3) switches between VCC(startup) (17 V) and VCC(stop) (8 V) level. The average output current during switching of the converter is 0.5 A. CH1 = VDRAIN CH2 = VCC CH3 = Io CH4 = Vo Fig 8. UM10529 User manual Short circuit of the output All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 10 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 5.6 Output voltage ripple performance The output voltage ripple was measured with an oscilloscope probe connected to the output of the demo board. A probe tip was used with a very small GND connection. A 100 nF capacitor between output voltage and GND was used to reduce high frequency noise. The output voltage ripple was measured at full load and at Vmains of 230 V. CH1 = VDRAIN CH4 = Vo on board (scale 50 mV/division). Fig 9. Output voltage ripple Figure 9 shows the output voltage ripple at a 1 A load at 230 V. The output ripple voltage is 72 mV using output capacitors C5 (1000 F/6.3 V Nichicon RL80J102MDN1KX) and C6 (1000 F/6.3V United Chemi-Con KY6R3ELL102MH15D). UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 11 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 5.7 Conducted EMI measurements results The conducted EMI is measured with the secondary GND connected to the protected mains earth GND. No y-cap between primary side and secondary side is used. EMI is measured on the neutral phase and on the line phase at Vmains = 230 V and at full load. The frequency range is 150 kHz to 30 MHz. Fig 10. Neutral 230 V Fig 11. Line 230 V UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 12 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board Fig 12. Neutral 115 V Fig 13. Line 115 V UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 13 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 6. Schematic and Bill Of material (BOM) 6.1 Small-size 5 W TEA1721AT demo board schematic Fig 14. 5 W TEA1721AT small-size demo board schematic UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 14 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 6.2 Bill of materials Table 4. Bill of materials Part Description Part number Manufacturer BD1 B10S; 1 kV; Mini SMD; 0.8 A B10S-G Comchip Tech. C1 4.7 F; 400 V; 8 9 mm AX-series Rubycon C2 4.7 F; 400 V; 8 9 mm AX-series Rubycon C3 10 F; 50 V; 5 11 mm EKY500ELL100ME11D United Chemi-Con C4 2.2 nF; 50 V; 0805 - - C5 1000 F; 6.3 V; 8 8 mm RL80J102MDN1KX Nichicon C6 1000 F; 6.3 V; 8 15 mm EKY6R3ELL102MH15D United Chemi-Con C7 10 pF; 0603 - - C8 10 nF; 0603 - - C9 220 pF; 1 kV; film-ceramic - - CN2 USB-port; USB A type flat 4-pin DIP KS-001PDH-ANB1-L Kuhn Yi D5 1N4007; 1 kV; DO-41; 1 A 1N4007 Vishay D7 1N4148; SOD80C glass PMLL4148L NXP Semiconductors D8 PMEG4050ETP; 40 V; DO-214AA(SMB); 5 A - NXP Semiconductors IC1 TEA1721AT; S07 TEA1721AT NXP Semiconductors J1 L (line) pin - J2 N (neutral) pin - L1 1.5 mH; DIP - - L2 1.5 mH; DIP - - R1 10 k; 0805 - - R2 10 k; 0805 - - R3 100 k; 0805 - - R4 470 ; 0805 - - Rsense 1.32 ; DIP; 1 W - - R6 0 ; 0805 - - R9 100 ; 0805 - - R10 5.3 k; 0603 - - Rtb11 39 k; 0603 - - Rtb12 39 k; 0603 - - Rtb21 4.3 k; 0603 - - Rtb22 180 k; 0603 - - RF1 10 ; 2 W; fusible - - RJ1 0.33 ; 1206, 1 % - - T1 2 mH; 124 : 8 : 20 EE13/12/6 horizontal; - Würth Elektronik W1 jumper wire; DIP - - UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 15 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 7. Circuit description The GreenChip SP TEA1721AT demo board consists of a single-phase full-wave rectifier circuit, a filtering section, a switching section, an output section and a feedback section. The circuit diagram is shown in Figure 14 and the component list is shown Table 4 on page 15. 7.1 Rectification section The bridge diodes BD1 form the single-phase full-wave rectifier. Capacitors C1 and C2 are reservoir capacitors for the rectified input voltage. Resistor RF1 limits inrush current and acts as a fuse. Terminals 1 and 2 connect the input to the electricity utility network. Swapping these two wires has no effect on the operation of the converter. 7.2 Filtering section Inductors L1 and L2, with capacitors C1 and C2, form 2 filters to attenuate conducted differential mode EMI noise. 7.3 GreenChip SP section The TEA1721AT device (IC1) contains the power MOS switch, oscillator, CV/CC, start-up control and protection functions all in one IC. Its integrated 700 V MOSFET allows sufficient voltage margins in universal input AC applications, including line surges. The auxiliary winding on transformer T1 generates the supply voltage and primary sensing information for the TEA1721AT. Diode D7 and capacitor C3 half-wave rectify the voltage. C3 charged via the current limiter resistor R6. The voltage on C3 is the supply voltage for the VCC pin. The RCD-R clamp consisting of R4, C9, D5 and R3 limits drain voltage spikes caused by leakage inductance of the transformer. 7.4 Output section Diode D7 is a Schottky barrier type diode and capacitors C5/C6 rectify the voltage from secondary winding of transformer T1. Using a Schottky barrier type diode results in a higher efficiency of the demo board. C5 and C6 must have sufficient low ESR characteristics to meet the output voltage ripple requirement without adding an LC post filter. Resistor R9 and capacitor C4 dampen high frequency ringing and reduce the voltage stress on diode D8. Resistor R10 provides a minimum load to maintain output control in no-load condition. 7.5 Feedback section The TEA1721AT controls the output by current and frequency control for CV and CC regulation. The auxiliary winding on Transformer T1 senses the output voltage. The FB pin senses the reflected output voltage using feedback resistors Rfb1 and Rfb2. UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 16 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 8. PCB layout RF1 R9 C5 D5 L C4 R4 IC1 C6 N D8 C9 L3 CN2 T1 R10 RJ1 C7 D7 C8 R6 R1 R2 aaa-003437 aaa-003124 a. Top silk BD1 Rtb22 Rtb21 L1 C11 C2 APBADC059 Ver.3 Rsense C3 Rtb11 Rtb12 C1 L2 R3 b. Bottom silk aaa-003438 c. Bottom layer Fig 15. Board layout UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 17 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 9. Transformer specifications 9.1 Transformer schematic design and winding construction The transformer used in the small-size demo board has size EE13 with bobbin EE13/12/6 horizontal 7 pins. A few measures have been taken for a low EMI emission. Copper foil shields are used between core and primary windings and between primary windings and secondary windings. The winding start point of the primary winding is connected to the third layer (N3) after second layer N2 is connected to pin 1. The primary windings are using a barrier tape of 1 mm on both sides. The secondary winding is winded with 2 wires in parallel to improve efficiency. PRI SEC tape-wrapping core and bobbin 1 7 N2 + N1 + N3 2 N5 1Ts N6 (auxiliary) Na 5 1Ts N5 (secondary) n.c. connect winding starting point to third layer (N3) after N2 is connected to pin 1 3 N6 1Ts N2 (primary) connect to bobbin pin 1 N4 1Ts N3 (primary) 4 n.c. 1Ts N4 (copper-foil shield) 1Ts N1 (primary) 1Ts Na (copper-foil shield) start primary winding teflon tube, black connect to bobbin pin 2 core teflon tube, transparent aaa-003125 Fig 16. Transformer schematic design and winding construction 9.2 Winding specification Table 5. Electrical specification Winding layer Wire diameter () copper foil 0.05 mm 7.5 mm Turns (T) Winding method Number of winding layers Remark 1 1 solder to pin 2 3 solder to pins 1 and 2 1 solder to pin 4 Na 2 N2 + N1 + N3 1 to 2 2UEW-B 0.12 mm 1P N4 4 N5 7 to 5 triple wire 0.5 mm 2P 9 tight 2 solder to pins 7 and 5 N6 3 to 4 2UEW-B 0.2 mm 1P 23 loose 1 solder to pins 3 and 4 143 copper foil 0.05 mm 7.5 mm tight 1 9.3 Electrical characteristics Table 6. Electrical specification Parameter Pin Value primary inductance 1 to 2 2 mH, 7 % Leakage inductance 1 to 2 100 H Remark secondary side shorted 9.4 Core, air gap and bobbin Core: EE13/12 (3C90) UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 18 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board Size of the air gap depends on the AL value of the ungapped core. After gapping, the AL of the core will be 98 nH/T2 10 %. Bobbin: EE13/12/6 horizontal, 7 pins 9.8 H 9.1 B 4.2 I 7.4 C 2.9 J 13.5 A 6.2 D 8.2 E 0.64 x 0.64 F 13.3 G 19.8 M 18.8 N 15.0 O 9.8 K 9.0 L 8.2 P aaa-003137 Fig 17. EE13/12/6 9.5 Marking Wurth/Midcom 750341253 UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 19 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 10. Attention points When testing the CC mode of the TEA1721AT, use an electronic DC-load in resistive mode, not in current mode. The current in CC mode has a small fold back characteristic (see Figure 5). When the current mode of an electronic DC-load is used, the output voltage drops immediate to zero when the maximum current is exceeded. Once the output voltage and the input voltage of the DC-load is zero, many DC-loads cannot adjust the current. Using the resistive mode of the electronic DC-load avoids this problem. Remark: This TEA1721AT controller behavior is not incorrect. Only test it in the correct way. UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 20 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 11. References UM10529 User manual [1] TEA1721AT/BT/DT/FT — data sheets: ultra-low standby SMPS controller with integrated power switch [2] TEA1723AT/BT/DT/FT — data sheets: ultra-low standby SMPS controller with integrated power switch data sheet [3] AN11029 — Application note: Using TEA1721/TEA1723 ultra-low standby SMPS controller ICs in white goods applications [4] AN11060 — Application note: TEA172X 5 W to 11 W power supply/usb charger [5] UM10520 — TEA1721 Isolated 3-phase universal mains flyback converter demo board user manual [6] UM10521 — TEA1721 isolated universal mains flyback converter demo board user manual [7] UM10522 — TEA1721 non-isolated universal mains buck and buck/boost converter demo board user manual [8] UM10523 — TEA1721 universal mains white goods flyback SMPS demo board user manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 21 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 12. Legal information 12.1 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. 12.2 Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors. Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors and its suppliers accept no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). NXP does not accept any liability in this respect. Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Evaluation products — This product is provided on an “as is” and “with all faults” basis for evaluation purposes only. NXP Semiconductors, its affiliates and their suppliers expressly disclaim all warranties, whether express, implied or statutory, including but not limited to the implied warranties of non-infringement, merchantability and fitness for a particular purpose. The entire risk as to the quality, or arising out of the use or performance, of this product remains with customer. In no event shall NXP Semiconductors, its affiliates or their suppliers be liable to customer for any special, indirect, consequential, punitive or incidental damages (including without limitation damages for loss of business, business interruption, loss of use, loss of data or information, and the like) arising out the use of or inability to use the product, whether or not based on tort (including negligence), strict liability, breach of contract, breach of warranty or any other theory, even if advised of the possibility of such damages. Notwithstanding any damages that customer might incur for any reason whatsoever (including without limitation, all damages referenced above and all direct or general damages), the entire liability of NXP Semiconductors, its affiliates and their suppliers and customer’s exclusive remedy for all of the foregoing shall be limited to actual damages incurred by customer based on reasonable reliance up to the greater of the amount actually paid by customer for the product or five dollars (US$5.00). The foregoing limitations, exclusions and disclaimers shall apply to the maximum extent permitted by applicable law, even if any remedy fails of its essential purpose. 12.3 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. GreenChip — is a trademark of NXP B.V. UM10529 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 29 May 2012 © NXP B.V. 2012. All rights reserved. 22 of 23 UM10529 NXP Semiconductors TEA1721AT 5 W GreenChip SP small-size demo board 13. Contents 1 2 3 4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 6 6.1 6.2 7 7.1 7.2 7.3 7.4 7.5 8 9 9.1 9.2 9.3 9.4 9.5 10 11 12 12.1 12.2 12.3 13 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Safety Warning. . . . . . . . . . . . . . . . . . . . . . . . . . 3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Technical specification . . . . . . . . . . . . . . . . . . . 4 performance data. . . . . . . . . . . . . . . . . . . . . . . . 6 No-load Input power dissipation . . . . . . . . . . . . 6 Output voltage and efficiency performance data 6 Dynamic loading from 0 A to 0.5 A . . . . . . . . . . 8 Dynamic loading from 0.5 A to 0 A . . . . . . . . . . 9 Short-circuit of the output . . . . . . . . . . . . . . . . 10 Output voltage ripple performance . . . . . . . . . 11 Conducted EMI measurements results. . . . . . 12 Schematic and Bill Of material (BOM) . . . . . . 14 Small-size 5 W TEA1721AT demo board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . 15 Circuit description . . . . . . . . . . . . . . . . . . . . . . 16 Rectification section . . . . . . . . . . . . . . . . . . . . 16 Filtering section . . . . . . . . . . . . . . . . . . . . . . . 16 GreenChip SP section . . . . . . . . . . . . . . . . . . 16 Output section . . . . . . . . . . . . . . . . . . . . . . . . 16 Feedback section . . . . . . . . . . . . . . . . . . . . . . 16 PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Transformer specifications . . . . . . . . . . . . . . . 18 Transformer schematic design and winding construction . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Winding specification . . . . . . . . . . . . . . . . . . . 18 Electrical characteristics . . . . . . . . . . . . . . . . . 18 Core, air gap and bobbin . . . . . . . . . . . . . . . . 18 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Attention points . . . . . . . . . . . . . . . . . . . . . . . . 20 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Legal information. . . . . . . . . . . . . . . . . . . . . . . 22 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2012. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] Date of release: 29 May 2012 Document identifier: UM10529