EVALUATION BOARD DATA SHEET EV145 Evaluation Board for the AAT1210 High Power DC/DC Boost Converter Introduction The AAT1210 evaluation board provides a platform for test and evaluation of the AAT1210 switching boost regulator. The evaluation board demonstrates suggested size and placement of external components to achieve output voltages from VIN + 0.5V to 18V and up to 900mA of maximum output current (VOUT = 5V). The external components are selected for small size to suit portable electronic applications while the layout has been optimized to achieve high efficiency and low output noise with the TDFN34-12 package. The design operates across an input voltage range from 2.7 to 5.5V. The AAT1210 evaluation board provides a single 5V or 9V output voltage rail with 380mA (VOUT = 9V) to 600mA (VOUT = 5V) of typical output current respectively. The desired output is determined by the jumpers positioned on JP1, JP2, and the logic level of the SEL pin. Connecting SEL to logic high (VIN) sets the output voltage to 9V while logic low (GND) sets the output voltage to 5V. S2Cwire programming sets the output from 5V (FB2 = 0.6V, default) to 10.1V (FB2 = 1.2V). This document provides details on the operation and testing of the AAT1210 evaluation board. Modification of the resistor divider network (R1, R2, R3) allows outputs from VIN + 0.5V to 18V. Operating Specification Specification Input Voltage Output Error Voltage Output Voltage1 Output Current Description/Conditions VOUT2 = VIN + 0.5V to 18V; 1% tolerance R1, R2, R3 EN/SET = VIN (JP1), SEL = VIN (JP2) EN/SET = VIN (JP1), SEL = GND (JP2) EN/SET = S2Cwire2 ; SEL = GND (JP2) VIN = 2.7 to 4.5V, VOUT = 5V, 1% Load Regulation VIN = 2.7 to 4.5V, VOUT = 5V, 5% Load Regulation VIN = 2.7 to 5.5V, VOUT = 9V, 1% Load Regulation VIN = 2.7 to 5.5V, VOUT = 9V, 5% Load Regulation Min Typ 2.7 -3.0 Max Units 5.5 +3.0 V % 9.0 5.0 5.0 V 10.1 300 600 250 380 mA Table 1: AAT1210 Evaluation Board Operating Specification. 1. Maximum nominal output voltages should be limited to 18.0V to avoid damaging the AAT1210 device. 2. Contact AATI Sales Representative for S2Cwire programming options. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202272A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 16, 2012 1 EVALUATION BOARD DATA SHEET EV145 Evaluation Board for the AAT1210 High Power DC/DC Boost Converter Schematic D1 Schottky L1 0.47µH 5V at 600mA 9V at 300mA 1 2 3 4 5 6 7 8 R1 36.5k C2 10µF 10V VIN: 2.7V to 5.5V U1 R2 549 R3 4.99k R4 16 LIN VP 15 LIN VP 14 FB1 EN/SET 13 FB2 SEL 12 GND VIN 11 PGND N/C 10 PGND SW 9 PGND SW AAT1210_TDFN34-16 10K C1 4.7µF JP1 1 2 3 Enable JP2 1 2 3 Select Figure 1: AAT1210 Evaluation Board Schematic Bill of Materials (BOM) Component U1 Part Number AAT1210IRN C1 C2 L1 D1 R1 R2 R3 R4 JP1, JP2 C1608X5R0J475K GRM188R60J475K C2012X5R1A106K GRM21BR61A106K SD10-R47-R MBR0530T1 CRCW06033652F CRCW0603549RF CRCW06034991F CRCW06031002F PRPN401PAEN Description Manufacturer High Power DC/DC Boost Converter with Optional Dynamic Voltage Programming Ceramic Capacitor: 4.7µF, 6.3V, 0603 Ceramic Capacitor: 10µF, 10V, 0805 0.47µH, 3.54A 30V, 0.5A Schottky Diode SOD-123 36.5KΩ, 1%, 0603, 1/10W 549Ω, 1%, 0603, 1/10W 4.99KΩ, 1%, 0603, 1/10W 10KΩ, 1%, 0603, 1/10W Connecting Header, 2mm Skyworks TDK Murata TDK Murata Cooper Bussmann On Semiconductor Vishay Vishay Vishay Vishay Sullins Electronics Table 2: AAT1210 Evaluation Board Component Listing. Setup 1. Configure the specified test equipment as shown in Figure 2, where Jumper 1 and Jumper 2 placement options are illustrated. 2. An additional 100µF or greater capacitor [CADD in Figure 2] may be required to decouple the input power supply and maintain stable operation. Solder the additional capacitor to the VIN and GND terminals on the AAT1210 evaluation board. 3. Input power supply with remote sense may be used. This simplifies the test procedure and maintains high accuracy of the input voltage across the loading range. Connect remote sense from input power source remote sense terminals to the VIN and GND terminals on the AAT1210 evaluation board (optional, not shown in Figure 2). 2 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202272A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 16, 2012 EVALUATION BOARD DATA SHEET EV145 Evaluation Board for the AAT1210 High Power DC/DC Boost Converter Figure 2: AAT1210 Evaluation Board Connection Diagram with Jumper 1 and Jumper 2 Settings, Including S2Cwire Interface Connections. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202272A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 16, 2012 3 EVALUATION BOARD DATA SHEET EV145 Evaluation Board for the AAT1210 High Power DC/DC Boost Converter Evaluation/Testing Enabling [Jumper 1 initially in ON position on JP1] 1.Turn-Off With input voltage applied, remove Jumper 1 and re-insert in the OFF position on JP1. The output voltage will decay to zero. 2.Turn-On With input voltage applied, remove Jumper 1 on JP1 and re-insert in the ON position on JP1. The output voltage will recover to its nominal DC value of 5V or 9V, depending on the Jumper 2 position/setting. Output Voltage Setting 1. Option 1: Static Output Voltage Most DC/DC boost converter applications require a static (fixed) output voltage. If a static voltage is desired, the FB1 pin should be connected directly to FB2 and a resistor between FB1 and FB2 pins is not required. A static output voltage can be configured by pulling the SEL either logic high or logic low. SEL pin high activates the FB1 reference pin to 1.2V (nominal). Alternatively, the SEL pin is pulled low to activate the FB2 reference at 0.6V (nominal). Table 3 provides details of resistor values for common output voltages from 5V to 18V for SEL = High and SEL = Low options. 2. Option 2: Dynamic Voltage Control Using the SEL Pin The output may be dynamically adjusted between two output voltages by toggling the SEL logic pin. Output voltages VOUT(1) and VOUT(2) correspond to the two output references, FB1 and FB2. Pulling the SEL pin logic high activates VOUT(1), while pulling the SEL pin logic low activates VOUT(2). In addition, the ratio of output voltages VOUT(2)/ VOUT(1) is always less than 2.0, corresponding to a 2X (maximum) programmable range. 3. Option 3: Dynamic Voltage Control Using S2Cwire Interface The output can be dynamically adjusted by the host controller to any of 16 pre-set output voltage levels using the integrated S2Cwire interface. The EN/SET pin serves as the S2Cwire interface input. The SEL pin must be pulled low when using the S2Cwire interface. Skyworks' S2Cwire serial interface is a proprietary high-speed single-wire interface. The S2Cwire interface records rising edges of the EN/SET input and decodes into 16 different states. Each state corresponds to a voltage setting on the FB2 pin, as shown in Table 4. 4.S2Cwire Output Voltage Programming The AAT1210 is programmed through the S2Cwire interface according to Table 4. The rising clock edges received through the EN/SET pin determine the feedback reference and output voltage set point. Upon power-up with the SEL pin low and prior to S2Cwire programming, the default feedback reference voltage is set to 0.6V. Contact AATI Sales Representative for S2Cwire programming options. 5.S2Cwire Serial Interface Timing The S2Cwire serial interface has flexible timing. Data can be clocked-in at speeds up to 1MHz. After data has been submitted, EN/SET is held high to latch the data for a period TLAT. The output is subsequently changed to the predetermined voltage. When EN/SET is set low for a time greater than TOFF, the AAT1210 is disabled. When disabled, the register is reset to the default value, which sets the FB2 pin to 0.6V if EN is subsequently pulled high. Load and Line Regulation 1. Enable the AAT1210 by placing Jumper 1 in the ON position on JP1, as shown in Figure 2. 2. Turn on the input power supply and set to desired input voltage based on the DC voltmeter. 3. Vary the output load from 0 to 600mA (VOUT = 5V and VIN = 2.7V to 4.5V) or 0 to 380mA (VOUT = 9V and VIN = 2.7V to 5.5V). 4 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202272A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 16, 2012 EVALUATION BOARD DATA SHEET EV145 Evaluation Board for the AAT1210 High Power DC/DC Boost Converter R3 = 4.99kΩ VOUT(1) (SEL = High) VOUT(2) (SEL = Low) R1 (kΩ) R2 (kΩ) 5.0V 6.0V 7.0V 8.0V 9.0V 10.0V 12.0V 15.0V 16.0V 18.0V 9.0V 10.0V 12.0V 15.0V 15.0V 16.0V 18.0V 15.0V 16.0V 18.0V 18.0V 5.0V 6.0V 7.0V 8.0V 9.0V 10.0V 12.0V 15.0V 16.0V 18.0V 5.0V 9.0V 10.0V 10.0V 12.0V 10.0V 10.0V 12.0V 12.0V 12.0V 15.0V 15.8 20.0 24.3 28.0 32.4 36.5 44.2 57.6 61.9 69.8 36.5 45.3 53.6 61.9 69.8 78.7 95.3 121 127 143 36.5 66.5 75 76.8 90.9 76.8 78.7 90.9 93.1 93.1 115 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.549 4.02 3.32 1.65 3.01 1.24 0.562 3.01 2.49 1.65 3.32 Table 3: SEL Pin Voltage Control Resistor Values (1% resistor tolerance). EN/SET Rising Edges FB2 Reference Voltage (V) EN/SET Rising Edges FB2 Reference Voltage (V) 1 2 3 4 5 6 7 8 0.60 (Default) 0.64 0.68 0.72 0.76 0.80 0.84 0.88 9 10 11 12 13 14 15 16 0.92 0.96 1.00 1.04 1.08 1.12 1.16 1.20 Table 4: S2Cwire Voltage Control Settings (SEL=Low). Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202272A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 16, 2012 5 EVALUATION BOARD DATA SHEET EV145 Evaluation Board for the AAT1210 High Power DC/DC Boost Converter Printed Circuit Board Figure 3: AAT1210 Evaluation Board Top Layer (not to scale). Figure 4: AAT1210 Evaluation Board Bottom Layer (not to scale). Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. 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Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. 6 Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202272A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 16, 2012