ADP1043ADC1-EVALZ

ADP1043A Daughter Card Evaluation Board ADP1043ADC1-EVALZ PRD1274 FEATURES ADP1043A Daughter Card with I2C interface Retrofit controller to any topology or existing design Software GUI Low component count ADP1043A EVALUATION BOARD OVERVIEW The daughter card evaluation board allows the ADP1043A to be quickly evaluated in any existing switching power supply application. Using the daughter card and its accompanying software, the IC can be interfaced to any PC running Windows 2000/NT/XP/Vista via the computers USB port. The daughter card can be connected to any existing ADP1043A evaluation board or reference design. It can also be connected to any power supply as a replacement for the existing controller. The daughter card has a connector through which the pin outs of the ADP1043A can be probed. The software GUI allows control and read/write functionality of the ADP1043 internal registers to modify, for example, the PWM settings or over current protection limits. Rev. 1.0 Reference designs are as supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of reference designs. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Reference designs are not authorized to be used in life support devices or systems. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved. ADP1043ADC1-EVALZ PRD1274 TABLE OF CONTENTS Features ....................................................................................................................................................................................... 1 EVALUATION BOARD HARDWARE............................................................................................................................................ 3 CONNECTORS ............................................................................................................................................................................ 4 REFURNISHING AND EXISTING DESIGN WITH ADP1043A DAUGHTER CARD ..................................................................... 5 Additional key points and checklist: .............................................................................................................................................. 7 SCHEMATIC ............................................................................................................................................................................. 8 LAYOUT ....................................................................................................................................................................................... 9 BILL OF MATERIALS ................................................................................................................................................................. 12 Notes .......................................................................................................................................................................................... 13 REVISION HISTORY 09/15/2010 - Revision 1.0: SPM 09/21/2010 - Revision 2.0: SPM with MS feedback 10/04/2010 - Revision 3.0: MS feedback implemented ADP1043ADC1-EVALZ EVALUATION BOARD HARDWARE PRD1274 ADP1043ADC1-EVALZ PRD1274 CONNECTORS The pin outs of the USB dongle are given below: Figure 4 – I2C connector (pin1 on left) Pin Evaluation Board Function 1 5V 2 SCL 3 SDA 4 Ground ADP1043ADC1-EVALZ PRD1274 REFURNISHING AND EXISTING DESIGN WITH ADP1043A DAUGHTER CARD To evaluate the IC with an existing power supply, a jumper cable can be used. Figure 6 and Figure 7 demonstrate how a jumper cable is connected on one end to the daughter card and the other end to the respective function of the pin on the power supply. Care must be taken to ensure that the traces/wires that are connected at their respective sensing points are short and are not routed through any high frequency traces (switching nodes) of the power stage that would result in poor signal integrity due to noise injection or EMI. A spread of wires must definitely be avoided as this increases the probability of injected noise due to bigger loop areas and common impedance coupling between the power ground and the analog and digital grounds. Note: The ADP1043A provides control and logic signals for the power switches. External drivers need to be used to turn on/off the switches in the power stage of the design. ADP1043ADC1-EVALZ PRD1274 ADP1043ADC1-EVALZ PRD1274 ADDITIONAL KEY POINTS AND CHECKLIST: 1. The daughter card is powered using the USB cable. The 3.3V LDO present on the PCB converts the 5V to 3.3V which supplies power to the ADP1043A. Alternately an isolated power supply 5V or 12V (referenced to AGND) may be used and connected to pins on the daughter card. The I2C connecter also has the SDA and SCL pins which are used for serial communication to the ADP1043A using the software GUI. 2. The RTD pin is referenced to AGND and the thermistor must be ideally placed close to the hottest part of the power stage for monitoring over temperature. Leave open if not used. 3. Connect the FLAGIN pin to 3.3V if this function is not required or set the flag to ignore in the Flags and Settings window in the GUI. 4. Connect PS_ON to 3.3V using a switch or permanently connected to 3.3V. If permanently connected then the power supply can be turned on using software PS_ON in the GUI. 5. OUTA, OUTB, OUTC, OUTD, and OUTAUX, are the PWMs used for the primary power switches while SR1 and SR2 are the PWMs used for the secondary side synchronous rectifiers. 6. The ACSNS flag is set when the ACSNS pin reads a value less than 0.45V. The flag is configurable. 7. CS2+ and CS2- (differential input) must be connected across the current sense resistor. Care must be taken not to exceed 150mV as it exceeds the maximum range of the ADC. 8. The voltage dividers for sensing the output voltage (VS1, VS2, and VS3) are on the daughter card. VS1 and VS2 are referenced to PGND whereas VS3+ and VS3- are differential inputs. VS3- must be connected to PGND. The voltage divider must be configured to provide 1V at the divider at the nominal output voltage to provide enough range for trimming. Care must be taken not to exceed 1.55V as it exceeds the maximum range of the ADC. 9. The GATE pin must be left open if the OrFET functionality is not used. 10. The CS1 signal is referenced to PGND. Care must be taken not to exceed 1.55V as it exceeds the maximum range of the ADC. The CS1 fast OCP comparator is set to trip at 1.2V. When using a current sense transformer the resistor R (see Figure 8) is sized by the equation: R V_CS1 N 2 ( N1 I PRIMARY_PEAK ) . 11. An external 12V connection can be provided to pin 30 of the daughter card to provide power for the switch drivers. NOTES: R2 1k R1 27K C10 100pF ACSNS DNI DNI DNI 33pF 33pF DNI R4 10k CS2+ C17 DNI C10 C13 C16 C17 DNI 10k High Side 110k 110k DNI R4 R3 SHARE0 SHAREi SDA SCL RTD FLAGIN PGOOD2 PGOOD1 PSON OUTAUX OUTD OUTC OUTB OUTA CS1 ACSNS SR1 SR2 CS2- CS2+ VS1 VS2 GATE VS3+ VS3- +5V +3.3V Low Side 10k 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 +12V 2 2 PGND C13 100pF C16 DNI CS2- R13 0 R3 10k C2 DNI C1 DNI AGND R6 1k R5 11k VS1 R16 0 R11 1k R10 11k C15 1000pF C4 DNI C3 DNI DGND CS1 R8 1k R7 11k VS2 8 7 6 5 4 3 2 1 C14 0.1uF VS3+ PGND CS1 ACSNS CS2+ CS2- VS1 AGND VS2 C9 DNI C7 DNI VS3- 2.2k R19 28 31 32 VS3- VS3+ RTD 28 C11 +3.3V U1 ADP1043 RTD 0.1uF C6 26 VCORE SCL SDA PSON FLAGIN PGOOD2 PGOOD1 SHAREO SHAREI 0.1uF R29 2.2k 17 18 19 20 21 22 23 24 R33 DNI +3.3V R24 2.2k R14 1.2k +3.3V SCL SDA PSON FLAGIN PGOOD2 PGOOD1 SHARE0 SHAREi C5 1.0uF 50V R17 0 D1 1N4148 +12V 5 6 8 7 D2 1N4148 GND NR OUT1 OUT2 SDA SCL +5V 4 3 2 1 U2 ADP3303 SD ERR IN1 IN2 +5V 2 1 29 33 PAD DNI R32 49.9k 30 R20 RES OUTA 11 OUTA SR1 9 SR1 29 ADD OUTB 12 OUTB OUTC 13 OUTC SR2 10 SR2 27 VDD OUTD 14 OUTD 25 DGND GATE 16 GATE OUTAUX 15 OUTAUX 1.2k R15 2 1 30 1: R3, R4, R5, R6, R7, R8, R10, R11 ARE 0.1% 25ppm UNLESS OTHERWISE SPECIFIED. 2 J1 4 3 1 2 J7 C8 0.1uF C12 0.47uF R12 1 +3.3V ADP1043ADC1-EVALZ PRD1274 SCHEMATIC ADP1043ADC1-EVALZ LAYOUT PRD1274 ADP1043ADC1-EVALZ PRD1274 ADP1043ADC1-EVALZ PRD1274 ADP1043ADC1-EVALZ PRD1274 BILL OF MATERIALS 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 36 37 38 39 40 41 42 Part Ref C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 J1 J7 R1 R2 R3 R4 R5 R6 R7 R8 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R24 R29 R32 R33 U1 U2 Part Description DNI DNI DNI DNI CAPACITOR CERAMIC 1.0UF 50V 10% X7R CAPACITOR CERAMIC 0.1UF 10% 50V X7R DNI CAPACITOR CERAMIC 0.1UF 10% 50V X7R DNI DNI CAPACITOR CERAMIC 0.1UF 10% 50V X7R CAPACITOR CERAMIC 0.47UF 5% 17V X7R DNI CAPACITOR CERAMIC 0.01UF 10% 100V X7R CAPACITOR CERAMIC 1000pF 10% 100V X7R CONNETOR HEADER FEMALE 30PS .1" DL TIN CONNECTOR HEADER 4POS SGL PCB 30 GOLD RESISTOR 27.0K OHM 1/8W 1% SMD RESISTOR 1.00K OHM 1/8W 1% SMD RESISTOR 10.0K OHM 1/10W .1% +/-25ppm SMD RESISTOR 10.0K OHM 1/10W .1% +/-25ppm SMD RESISTOR 11.0K OHM 1/10W .1% +/-25ppm SMD RESISTOR 1.00K OHM 1/10W .1% +/-25ppm SMD RESISTOR 11.0K OHM 1/10W .1% +/-25ppm SMD RESISTOR 1.00K OHM 1/10W .1% +/-25ppm SMD RESISTOR 11.0K OHM 1/10W .1% +/-25ppm SMD RESISTOR 1.00K OHM 1/10W .1% +/-25ppm SMD RESISTOR 0.0 OHM 1/8W 5% SMD RESISTOR 0.0 OHM 1/8W 5% SMD RESISTOR 1.00K OHM 1/8W 1% SMD RESISTOR 1.00K OHM 1/8W 1% SMD RESISTOR 0.0 OHM 1/8W 5% SMD RESISTOR 0.0 OHM 1/8W 5% SMD DNI RESISTOR 10.0K OHM 1/8W 1% SMD RESISTOR 49.9K OHM 1/8W 1% SMD RESISTOR 2.20K OHM 1/8W 1% SMD RESISTOR 2.20K OHM 1/8W 1% SMD DNI DNI I.C. Secondary Side Power Supply Controller I.C. LDO LINEAR REGULATOR 200MA 3.3V Package Manufacturer Murata 1210 Murata 805 AVX GRM32RR71H105KA01L 08055C104KAT2A 805 AVX 08055C104KAT2A 805 AVX 805 AVX 08055C104KAT2A 0805YC474JAT2A 805 603 Fmal Socket Header-4POS 805 805 805 805 805 805 805 805 805 805 805 805 805 805 805 805 805 805 805 805 LFCSP-32 SOIC-8 Mfg Part No GRM32RR71H105KA01L AVX Murata Sullins Connector Solutions FCI Any Any Any Any Any Any Any Any Any Any Any Any Any Any Any Any 08051C103KAT2A GRM188R72A102KA01D PPTC152LFBN-RC 69167-104HLF Any Any Any Any ADP1043A ADP3303 Analog Devices Analog Devices ADP1043ADC1-EVALZ NOTES ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Error! Unknown document property name. PRD1274