DEMO MANUAL DC1674A-B LTC4156EUFD Dual Input Power Manager/3.5A LiFePO4 Battery Charger with I2C Control and USB OTG DESCRIPTION Demonstration Circuit 1674A-B is dual input power manager/3.5A LiFePO4 battery charger with I2C control and USB On-The-Go (OTG). Most functions on the LTC®4156EUFD are controlled via the I2C serial interface. The LTC4156EUFD also provides extensive status information via the I2C serial interface. The dual input multiplexer, overvoltage protection (OVP) and reverse voltage protection (RVP) is implemented with external N-channel MOSFETs. Please refer to the LTC4156EUFD data sheet for details about the I2C serial interface, control and status registers, and the electrical and timing specifications. An on board buck regulator generates the VOUT voltage from the active input voltage. This voltage is regulated to minimize the dissipation in the battery charger. The minimum voltage of the VOUT regulator is 3.2V to provide an instant-on function when the battery is fully discharged. The LTC4156EUFD does modify several of its own control registers to reflect the current operating conditions. PERFORMANCE SUMMARY (TA = 25°C) SYMBOL PARAMETER CONDITIONS VWALL WALL Input Voltage Range IWALL Input Current from WALL Input VUSB USB Input Voltage Range IUSB Input Current from USB Input Design files for this circuit board are available at http://www.linear.com/demo L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks and QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 4.35V < VWALL < 6V 4.35V < VUSB < 6V VOUT Voltage on the VOUT Pin 0A < IVOUT ≤ 4A, 2.7V < VBAT ≤ 3.8V IVOUT Output Current from VOUT Total Load Current Including Battery Charger VBAT Voltage on the BAT Pin IBAT BAT Pin Source or Sink Current VWALL,USB Input Voltage Range, Non-Operating MIN TYP MAX 4.35 5 5.5 UNITS V 0 0.1 3 A 4.35 5 5.5 V 0 0.1 3 A 3.19 3.5 4.6 V 4.5 A 3.6 V –4 3 A 5.75 27 V 3.3 Switching Regulator Efficiency I2C Controlled High Power Battery Charger/USB Power Manager VIN VOUT CHGSNS VBUS 10μF 3.6k 2 LTC4156 USBGT BATSNS USBSNS ID I2C IRQ GND CLPROG2 CLPROG1 PROG VC 1.21k 499Ω 22μF BATGATE 90 TO SYSTEM LOAD 100k 80 EFFICIENCY (%) 1μH SW WALLSNS WALLGT 100 70 60 50 40 30 NTCBIAS NTC OVGCAP 20 10 0.1μF VBAT = 3.3V 0 47nF 0 0.5 2.0 1.5 1.0 LOAD CURRENT (A) 2.5 3.0 DC1674ab TA01b dc1674ab TA01a dc1674abf 1 DEMO MANUAL DC1674A-B QUICK START PROCEDURE DC1674A-B working input voltage range is 4.35V to 5.5V on both the WALL and USB input. The DC1674A-B will tolerate non-operating overvoltage inputs up to 27V. DC1674A-B utilizes the DC590B, USB to I2C interface board, to control the LTC4156EUFD and to read back the contents of the command and status registers. The DC1674A-B is easy to set up to evaluate the performance of the LTC4156EUFD. Refer to Figure 1 and Figure 2 for proper measurement equipment setup and follow the evaluation procedure below using the DC590B board. NOTE. When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the input or output voltage ripple by touching the probe tip directly across the VIN or VOUT and GND terminals. See Figure 2 for proper scope probe technique. Figure 1. Proper Measurement Equipment Setup Figure 2. Measuring Input or Output Ripple dc1674abf 2 DEMO MANUAL DC1674A-B QUICK START PROCEDURE 1. Ensure that JP1 and JP2 are in their default positions, as shown in Figure 1. Set PS3 to 3.6V and turn on. The DVCC voltage level may be selected on the DC590B. This is done by setting the VCCIO jumper, JP6, on the DC590B board to one of the following settings: 3.3V, 5V, removed for 2.7V or set to external if an external supply is desired to be used. Please set DVCC to 3.3V. 2. Start the Linear Technology QuickEval™ program. Download and install the latest version of the QuikEval program from the following weblink: http://www.linear. com/designtools/software/. This program should automatically detect the presence of the LTC4156EUFD demo board (DC1674A-B) and activate the appropriate GUI, as seen in Figure 3. 3. Set PS1 to 5V, and turn on. The “WALL Input Power Available” and “External Power Available” indicators on the GUI should turn green. The current on PS1 should indicate approximately 80mA. 4. Set “WALL ILIM” to 3000mA. To compensate for the sense resistance of IM1, adjust PS3 such that VM3 reads 3.6V. PS1 should now read approximately 2A, and IM1 should read approximately 2.4A. 5. Set PS2 to 5V, and turn on. The only change should be the “USB Input Power Available” indicator should turn green. 6. Set the “USB ILIM” to 3000mA, and select the USB Input radio button in the “Input Power Priority” frame. PS1 should now read 0A, PS2 should read approximately 2A, and IM1 should be unchanged at 2.4A 7. Set LD1 to 1A, and turn on. PS2 should now read approximately 3A, and IM1 should be unchanged. 8. Set “ICHARGE%” to 50%. PS2 should now read approximately 2A, and IM1 should be 1.2A. USING THE LTC4156EUFD SOFTWARE Introduction The DC1674A-B GUI provides control of most aspects of operation of the LTC4156EUFD. The DC1674A-B GUI continuously reads back the LTC4156EUFD registers and updates the displayed status accordingly. The DC1674A-B GUI also provides a means to change the value of the CLPROGx and PROG resistors, as well as the β of the NTC device. The user is responsible for ensuring that these values match the values on the physical Demo Board. The DC1674A-B GUI will remember these values from session to session, and they can be reset to the default values at any time. The DC1674A-B GUI is composed of three forms, the LTC4156 form (Figure 3) that is brought up by the QuickEval program, the Manage Current Limit Resistors form (Figure 4), that is brought up by pressing the “Change Resistors” button on the LTC4156 form, and the Manage β Value form (Figure 5) that is brought up by pressing the “Change β” button on the LTC4156 form. Any changes made in the Manage Current Limit Resistors or Manage β Value forms will be reflected on the main form as soon as “Apply” is pressed. All changes made in these two forms will be remembered from session to session. The values can be set to default at any time. View LTC4156EUFD Product Page This button opens your default internet browser, and searches the Linear Technology Corporation web site for information on the LTC4156EUFD when an internet connection is available. WALL and USB ILIM Sections 9. Turn off and disconnect PS1, VM1, and PS2. These sections allow control over the WALL and USB input current limit. 10. Select the “Force OTG Boost On” radio button. VM2 should now read approximately 5V. These sections should default to 100mA at power-up, when the USB/USER (JP1) is in the “USB” position. They dc1674abf 3 DEMO MANUAL DC1674A-B QUICK START PROCEDURE should both default to the 1000mA value at the top of the frame, at power-up, with the USB/USER (JP1) in the “USER” position. If the USB input power becomes unavailable, the USB ILIM section will return to 100mA. Input Power Priority By default, the WALL input has priority on the input power multiplexer. The priority can be reassigned to USB input by selecting the appropriate radio button. OTG Boost Automatic Enable ICHARGE% Section This section controls the battery charging current as a percent of maximum. The maximum is shown at the top of the frame, and is calculated from the displayed PROG resistor value. C/x Set Select the End of Charging condition. This selects the current, as a percent of the maximum that indicates end of charging. Optionally, charging may also be terminated at the C/x current threshold by selecting the “4hr or C/x” timer mode. Timer This selects the timeout for the charging timer. When the end of charging condition is reached, the charger is not turned off, but the timer is started, and when it times out, the charger is turned off. The exception is “4hr or C/x” mode, where whichever 4hrs or C/x, occurs first will terminate charging. VFLOAT This selects the desired battery float voltage, and defaults to 3.45V. Selectes whether or not the ID pin of the USB connector enables USB On-The-Go (OTG) operation. It may be desirable to control USB OTG directly, without the need to set the USB connector ID pin voltage level below VID_OTG. To control USB OTG directly, check the “Force OTG Boost On” box. Automatic enable has no effect on ID pin status indication. Disable Input UVCL As the active input voltage (USB or WALL) drops below 4.3V, the LTC4156EUFD will lower the input current limit to attempt to prevent the input voltage from drooping lower. This is a useful feature in the input supply voltage is not very stiff, or if there is significant impedance between the input supply and the LTC4156EUFD. If this function is not desired, check the “Disable Input UVCL” box. Interrupts The LTC4156EUFD can monitor a variety of conditions, which it reports over the I2C buss. By selecting the check boxes in the Interrupt section, the LTC4156EUFD can also issue interrupts whenever one of these conditions changes. The presence of an interrupt is indicated by the indicator changing to red and displaying “Interrupt Pending.” The interrupt can be cleared by pressing the “Clear Interrupt” button. Changing the interrupt mask also clears all pending interrupts. dc1674abf 4 DEMO MANUAL DC1674A-B QUICK START PROCEDURE Figure 3. LTC4156 Main Form Figure 4. Manage Current Limit Resistors Form Figure 5. Manage β Value Form dc1674abf 5 DEMO MANUAL DC1674A-B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Capacitor, Chip, X5R, 22μF, ±10%, 25V, 1210 Murata, GRM32ER61E226KE15L Required Circuit Components 1 2 C1, C2 2 3 C3, C11, C12 Capacitor, Chip, X5R, 22μF, ±20%, 6.3V, 0805 TAIYO-YUDEN, JMK212BJ226MG 3 1 C5 Capacitor, Chip, X7R, 0.01μF, ±10%, 25V, 0402 TDK, C1005X7R1E103K 4 1 C9 Capacitor, Chip, X7R, 0.047μF, ±10%, 25V, 0402 TDK, C1005X7R1E473K 5 1 C10 Capacitor, Chip, X5R, 100μF, ±20%, 6.3V, 1210 Murata, GRM32ER60J107ME20L 6 1 L1 Inductor, SMT, 1μH, 10.8mΩ, ±20%, 4mm × 4mm Coilcraft, XFL4020-102ME 7 2 M1-M2 MOSFET, 40V, 25mΩ, 12A, Power33 Fairchild, FDMC8030 8 1 M3 MOSFET, –20V, 22mΩ, 12A, Power PAK ChipFET Single Vishay, Si5481DU-T1-GE3 9 1 Q1, Q2 Dual NPN, SOT363 Diodes/Zetex, MMDT3904-7-F 10 2 R1, R5 Resistor, Chip, 1MΩ, ±5%, 1/16W, 0402 Vishay, CRCW04021M00JNED 11 2 R2, R6 Resistor, Chip, 3.6k, ±5%, 1/8W, 0805 Vishay, CRCW08053K60JNED 12 2 R3, R4 Resistor, Chip, 47k, ±5%, 1/16W, 0402 Vishay, CRCW040247K0JNED 13 2 R13, R17 Resistor, Chip, 100k, ±1%, 1/16W, 0402 Vishay, CRCW0402100KFKED 14 2 R14, R15 Resistor, Chip, 1.21k, ±1%, 1/16W, 0402 Vishay, CRCW04021K21FKED 15 1 R16 Resistor, Chip, 499Ω, ±1%, 1/16W, 0402 Vishay, CRCW0402499RFKED 16 4 R18, R19, R22, R23 Resistor, Chip, 0Ω Jumper, 1/16W, 0402 Vishay, CRCW04020000Z0ED 17 1 U1 (ASSEMBLY - A) U1 (ASSEMBLY - B) Dual Input Power Manager/3.5A Li-Ion Battery Charger with I2C Control and USB OTG Linear Technology, LTC4155EUFD Linear Technology, LTC4156EUFD Murata, GRM31CR71H475KA12L Additional Demo Board Circuit Components 1 1 C4 Capacitor, Chip, X7R, 4.7μF, ±10%, 50V, 1206 2 1 C6 Capacitor, Chip, X7R, 0.01μF, ±10%, 25V, 0402 TDK, C1005X7R1E103K 3 1 C7 Capacitor, Chip, X5R, 0.1μF, ±10%, 25V, 0402 TDK, C1005X5R1E104K 4 0 C8-OPT Capacitor, Chip, TBD, 0402 User Defined 5 0 C13-OPT Capacitor, Chip, X5R, 22μF, ±10%, 25V, 1210 Murata, GRM32ER61E226KE15L 6 1 D1 LED, Red, 0603 Panasonic, LNJ208R8ARA 7 1 R7 Resistor, Chip, 1.0Ω, ±5%, 1/16W, 0402 Vishay, CRCW04021R00JNED 8 1 R8 Resistor, Chip, 100k, ±1%, 1/16W, 0402 Vishay, CRCW0402100KFKED 9 1 R9 Resistor, Chip, 0Ω Jumper, 1/16W, 0402 Vishay, CRCW04020000Z0ED 10 2 R10, R11 Resistor, Chip, 5.1k, ±5%, 1/16W, 0402 Vishay, CRCW04025K10JNED 11 1 R12 Resistor, Chip, 51k, ±5%, 1/16W, 0402 Vishay, CRCW040251K0JNED 12 1 R20 Resistor, Chip, 1k, ±5%, 1/10W, 0603 Vishay, CRCW06031K00JNED 13 0 R21-OPT Resistor, Chip, TBD, 0402 User Defined 14 1 U2 I2C EEPROM Microchip, 24LC025-I/ST Turret, 0.09 DIA Mill-Max, 2501-2-00-80-00-00-07-0 Hardware/Components (For Demo Board Only) 1 8 E1, E2, E3, E4, E11, E13, E14, E15 2 7 E5, E6, E7, E8, E9, E10, E12 Turret, 0.061 DIA Mill-Max, 2308-2-00-80-00-00-07-0 3 1 J1 Connector, USB Micro-B Tyco, 1981568-1 4 1 J2 Header, 2 × 7 Pin, 0.079CC Molex, 87831-1420 5 0 J3-OPT Connector, Battery Hirose, DF3-3P-2DSA 6 2 JP1, JP2 Header, 3-Pin 1 Row 0.079CC Samtec, TMM-103-02-L-S 7 2 JP1, JP2 Shunt, 2mm Samtec, 2SN-KB-G 8 4 Stand-Off, Nylon, 0.375” Tall (Snap On) Keystone, 8832 (SNAP ON) 9 1 FAB, Printed Circuit Board Demo Circuit 1674A 10 2 Stencil - Top & Bottom DC1674A-2 dc1674abf 6 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C USB C1 22uF 1210 25V E4 PROG CLPROG2 CLPROG1 NTC NTCBIAS E9 E8 E7 E6 E5 1 3 5 7 9 11 13 + + + + + + + J2 + + + + + + + DC590 INTERFACE GND 2 4 6 8 10 12 14 J1 MICRO-B GND D+ D- ID VBUS 5 R10 5.1k 5% R8 100k D+ TP1 DTP2 NON - OPERATING FAULT TOLERANCE TO + / - 27V CONTINUOUS. 4.35V - 5.5V E3 GND GND GND GND GND GND D E1 4.35V - 5.5V E2 GND WALL NON - OPERATING FAULT TOLERANCE TO + / - 27V CONTINUOUS. R7 1.0 5% WP 24LC025I/ST 7 4 VSS A0 256X8 A1 A2 1 2 3 8 VCC SCLK SDA 5 U2 C7 0.1μF 25V Q2A MMDT3904 Q2B MMDT3904 R4 47k 5% R3 47k 5% 6 C4 4.7uF 1206 50V ID TP3 C2 22uF 1210 25V Q1B MMDT3904 R11 5.1k 5% 0 R9 DVCC 4 1Meg 5% R1 R6 R12 51k 5% R14 1.21k C6 0.01uF 25V DVCC TP14 FDMC8030 M1B R15 1.21k R16 499 3 SCL TP16 OVGCAP TP8 R17 100k R18 0 USER 1 23 OVGCAP USBGT USBSNS NTC NTCBIAS PROG CLPROG2 CLPROG1 SCL SDA DVCC ID 24 25 29 GND SW 26 SW 27 IRQ 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C9 0.047μF 25V BATGATE TP10 GEORGE B. APP ENG. 2 SCALE = NONE NC PCB DES. APPROVALS BATSNS 16 VC 12 BATGATE 17 3 0 R23 L1 1.0μH XFL4020-102ME VOUTSNS TP13 TP11 SW 2 DATE: N/A SIZE LTC4156EUFD -B GEORGE B. APPROVED C12 22uF 0805 6.3V 20% GND R22 0 E10 E11 IRQ GND BATSNS E12 BAT E13 VFLOAT = 4.05V, 4.1V, 4.15V, 4.2V 4A DF3-3P-2DSA 1 BAT J3 2 GND OPT 3 NTC E14 VOUT 3.5V - 4.5V 4A E15 DATE 05-05-11 05-05-11 IC NO. 1 LTC4155EUFD / LTC4156EUFD DEMO CIRCUIT 1674A-A/B SHEET 1 OF 1 2 REV. DUAL INPUT POWER MANAGER / 3.5A Li-Ion BATTERY CHARGER WITH I2C CONTROL AND USB OTG 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only R19 0 C10 100uF 6.3V 1210 20% C13 22uF 1210 25V 20% OPT NOTES: UNLESS OTHERWISE SPECIFIED 1. RESISTORS: OHMS, 0402, 1%, 1/16W 2. CAPACITORS: uF, 0402, 10%, 50V U1 LTC4155EUFD -A TECHNOLOGY 0603 R20 1k 5% DVCC TITLE: SCHEMATIC C8 TBD 25V OPT R21 TBD OPT VC TP9 1 ASSY M3 Si5481DU * PRODUCTION FAB DESCRIPTION REVISION HISTORY D1 LNJ208R8ARA INTERRUPT PENDING RED 2 - C11 22uF 0805 6.3V 20% REV ECO LEAKAGE CURRENT MUST BE < 50nA VOUT 22 VOUT 21 CHGSNS 20 CHGSNS 19 VOUTSNS 13 VBUS VBUS VBUS WALLSNS WALLGT * CUSTOMER NOTICE NTC 3 EXT 15 14 18 6 5 28 1 2 4 10 9 8 7 11 U1 VBUS TP12 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. JP2 1 INT R13 100k USB 3 JP1 C5 0.01μF 25V U1.7,9,10 : LEAKAGE CURRENT MUST BE < 400nA C3 22uF 0805 6.3V 20% TP4 WALLSNS TP5 WALLGT R2 3.6k 5% 0805 INPUT CURRENT SDA TP15 USBGT TP6 M2A FDMC8030 USBSNS TP7 5% R5 1Meg M2B FDMC8030 FDMC8030 M1A 3.6k 5% 0805 4 2 Q1A MMDT3904 2 5 A B C D DEMO MANUAL DC1674A-B SCHEMATIC DIAGRAM dc1674abf 7 DEMO MANUAL DC1674A-B DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation dc1674abf 8 Linear Technology Corporation LT 0312 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2012