TP2 SWP 4.7 H. Designator LXP VOUTP NCP ENABLE J2 TP5 SWN FBN SWN D1 L2. R4 18k TP8 FBN. Figure 1. NCP5810DGEVB Schematic
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1 NCP580D: Dual W Output AMOLED Driver Supply Evaluation Board Prepared by: Hubert Grandry Overview The NCP580D is a dual output DC/DC converter which can generate both a positive and a negative voltage. The device is optimized for powering modules such as AMOLED display drivers where very good output voltage accuracy and regulation, signal integrity and space is essential for handsets applications. The output voltage of the inverter is fully configurable using external feedback resistors, where the output voltage of the boost is internally fixed at V. The intent of the demo boards is to illustrate typical operation of the NCP580D device for laboratory characterization. The NCP580DGEVB schematic is depicted. Operation The operating power supply of the NCP580D is from.7 V to 4.6 V. The absolute maximum input voltage is 7.0 V. A power supply set to 3.7 V and current limit set to at least.5 A must be connected to J connector to powering the NCP580DGEVB/D. Also to compensate for parasitic inductance of wires between the power supply and the evaluation board it is highly recommended to connect a 470 F electrolytic capacitor to bypass J terminal. Like this the device can be evaluate under powering condition very similar that battery power supplies. Performances of EVB Solution To be as close as possible with final handset application, the design of this power conversion solution used small size footprints where possible. Changing components may positively or negatively impact the demo board performance illustrate Figures to 4. For example, should one change inductors: a larger one having a lower DCR or/and higher value (in micro Henri) may improve efficiency. Adding the optional Schottky diode D provides a lower drop when the current flowing from the inductor to the load, thereby improving the boost converter efficiency. Also placing a jumper across Pins of J6 shorts the True Shut Down function but improved the efficiency. For more information please refer to the NCP580D datasheet. PVIN J ENABLE J VBAT VBAT VBAT TP PVIN C 4.7 F TP4 AVIN C3.0 F TP7 Vref J6 SHORT TC U C5 0. F PVIN PGND EN AVIN AGND VREF 4 5 LXP NCP580 R4 8k 7 FBN L 4.7 H SWP VOUTP R5 VS SWN TP SWP 6 TP5 SWN 0 5k D C 4.7 F D L 4.7 H Designator R6 TP9 FBP C6 Optional NSR030MWT NSR030MWT C4 4.7 F 0 pf 500 k J7 SHORT TP3 VOUTP TP6 VOUTN 3 J3 OUTPUT TP8 FBN Figure. NCP580DGEVB Schematic J8 SHORT R6 Semiconductor Components Industries, LLC, 008 April, 008 Rev. 0 Publication Order Number: NCP580DGEVB/D
2 INPUT POWER J Descriptions This is the positive connection for power supply. The leads (positive + ground) to the input supply should be twisted and kept as short as possible. J J4, J5 Ground clip OUTPUT POWER J3 J3 J3 3 OUTPUT SETUP SWITCHES SETUP This is the return connection for the power supply (Ground signal) Descriptions This is the positive output connection (VOUTP) of the boost converter. Ground to connect the load. This is the negative output connection (VOUTN) of the inverter. Descriptions R6 This adjustable resistor setup the negative output voltage from.0 to 5 V. J J6 Switch Descriptions To enable the converter connect a shorting jumper between J and J SHORT True SD: Short the True Shutdown function: When a jumper is connected, the internal PMOS used disconnect the load from the battery is bypassed. J8 TEST POINT TP TP TP3 TP4 TP5 TP6 TP7 TP8 TP9 A solder dot can be place to short R6 in order to fix VOUTN by R4 and R5 only. Switch Descriptions Test point is directly connected to the PVIN pin to sense the battery voltage. This test point is connected to the SWP pin signal. This test point is connected to the positive output voltage: VOUTP This test point is directly connected to the AVIN pin to sense battery voltage. This test point is connected to the SWN pin signal. This test point is connected to the negative output voltage: VOUTN This test point is connected to the Vref pin signal. This test point is connected to the FBN pin signal. This test point is connected to the VS pin signal.
3 TYPICAL OPERATING CHARACTERISTICS EFFICIENCY (%) V IN = 3.3 V V IN = 3.7 V V IN = 4. V EFFICIENCY (%) V IN = 3.3 V V IN = 3.7 V V IN = 4. V I OUT (ma) Figure. Efficiency vs. I OUT at V OUTN = 5.4 V L = TDK VLF300 4R I OUT (ma) Figure 3. Efficiency vs. I OUT at V OUTN = 5.4 V L = TDK VLF300 4R7, J Short 90 V IN = 4. V EFFICIENCY (%) V IN = 3.3 V V IN = 3.7 V I OUT (ma) Figure 4. Efficiency vs. I OUT at V OUTN = 5.4 V L = TDK VLF300 4R7, D = NSR030, J Short 3
4 PCB Layout As with all switching DC/DC converter, care must has been observed to place the components on the PCB and layout the critical nodes. Noise sensitive feedback path such as VS and FBN has been isolated from SWP and SWN nodes how carry high frequency switching current. Also in order to compensate voltage drop due to the parasitic resistance through output power tracks, feedback pins are sensing directly the corresponding output voltage: TP3 of the boost for VS and TP6 of the inverter for FBN. Finally to provide EMI behavior similar as mass production application, the evaluation board is made of 4 PCB layers where first internal layer is a GND plane at 90 m from to top. Figures 5, 6 and 7 show the layout of the NCP580DGEVB board. For more specific layout guidelines please refer to the NCP580D datasheet. Figure 5. Assembly Layer 4
5 Figure 6. Top Layer Routing Figure 7. Bottom Layer Routing 5
6 BILL OF MATERIALS Qty Ref Des. Description Size Manufacturer Part Number U Dual W Output AMOLED Driver Supply Pin UDFN 3 x 3 x 0.55 ON Semiconductor NCP580D 3 C, C4 Capacitor, Ceramic 4.7 F 0 V 0805 TDK C0X5RA475M C Capacitor, Ceramic 4.7 F 0 V 0603 TDK C608X5RA475M C3 Capacitor, Ceramic.0 F 6 V 0603 TDK C608X5RC05MT C5 Capacitor, Ceramic 0. F 5 V 0603 TDK C608X5RE04M C6 Capacitor, NPO 0 pf 50 V 0603 TDK C608COGH00D D Schottky Diode SOD 33 ON Semiconductor NSR030MWTG D Schottky Diode (Optional) SOD 33 ON Semiconductor NSR030MWTG L, L Inductor, SMT, 4.7 H, 700 ma, 40 m.6 x.8 x.0 mm TDK VLF300AT 4R7MR70 R NC R NC R3 NC R4 Resistor, Chip, 8 k, % 0603 Std Std R5 Resistor, Chip, 5 k, % 0603 Std Std R6 Top Adjust Resistor, 500 k 3.9 x 4.8 x 5.3 mm BOURNS 34W 504 J Mal. SL5.08//90B plus Fem. BLZ 5.08/ Weidmuller SL5.08//90 + BLZ 5.08/ J, J6 Header pin, 00 mil spacing 0.00 x Std Std J3 Mal. SL5.08/3/90B plus Fem. BLZ 5.08/3 Weidmuller SL5.08/3/90 + BLZ 5.08/3 J4, J5 GND Connection Std Std J7 Solder dot to connect VS to VOUTP 9 TP to TP9 Test Point Std Std PCB PCB.0 in x.0 in x.0 mm, 4 Layers Any TLS P 003 C 006 HG ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Typical parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customer s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 563, Denver, Colorado 807 USA Phone: or Toll Free USA/Canada Fax: or Toll Free USA/Canada orderlit@onsemi.com N. American Technical Support: Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: Japan Customer Focus Center Phone: ON Semiconductor Website: Order Literature: For additional information, please contact your local Sales Representative NCP580DGEVB/D
7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: ON Semiconductor: NCP580DGEVB
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NTMS4801NR2G. Power MOSFET 30 V, 12 A, N Channel, SO 8
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NTK3139P. Power MOSFET. 20 V, 780 ma, Single P Channel with ESD Protection, SOT 723
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NCP A, Low Dropout Linear Regulator with Enhanced ESD Protection
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Distributed by: www.jameco.com 1-800-831-44 The content and copyrights of the attached material are the property of its owner. Transient Voltage Suppressors Micro Packaged Diodes for ESD Protection The
Is Now Part of To learn more about ON Semiconductor, please visit our website at
Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC
AND8388/D. Input Dynamic Range Extension of the BelaSigna 300 Series
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MBRA320T3G Surface Mount Schottky Power Rectifier
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NUD4700. LED Shunt. Features. Typical Applications MARKING DIAGRAM PIN FUNCTION DESCRIPTION ORDERING INFORMATION.
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NCV887300LEDGEVB. NCV Automotive Grade High frequency Dimmable LED Boost Controller Evaluation Board User's Manual EVAL BOARD USER S MANUAL
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AND8289. LED Driving with NCP/V3063
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Is Now Part of To learn more about ON Semiconductor, please visit our website at
Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC
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NTMD4820NR2G. Power MOSFET 30 V, 8 A, Dual N Channel, SOIC 8
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Is Now Part of To learn more about ON Semiconductor, please visit our website at
Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC
NCP1529ASNT1GEVB, NCP1529MUTBGEVB
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