DEMO MANUAL DC2181A-A/B LTC4120EUD Wireless Power Receiver and 400mA Buck Battery Charger Description Demonstration circuit 2181 is an LTC(R)4120EUD demonstration board. The DC2181 is used with the DC1968A wireless power transmitter or the PowerByProxi ProxiPoint transmitter (both available separately). Either can deliver 2W to the DC2181, with up to 10mm spacing between the transmitter and the receive coil. The basic transmitter doesn't support foreign metal object detection. Transmitters available separately. See last page for details. FEATURED PART DC2181A-A LTC4120EUD-4.2 (Fixed Output) DC2181A-B LTC4120EUD (Adjustable Output) Design files for this circuit board are available at http://www.linear.com/demo/DC2181A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Performance Summary Specifications are at TA = 25C SYMBOL PARAMETER CONDITIONS HVIN DC1968A High Voltage Input Voltage Range IHVIN 500mA at HVIN = 8V VCC DC1968A VCC Input Range IVCC = 0 ~ 700mA V(BAT) DC2181A BAT Pin Voltage R9 = 1.40M, R10 = 1.05M 2.5 I(BAT) DC2181A BAT Pin Current V(BAT) = 3.7V, DC1967A(R5) = 3.01k, All Bar Graph LEDs on. 370 MIN TYP MAX UNITS 8 38 V 4.75 5.25 V 380 4.25 V 390 mA Board Photo OR OR Figure 1. DC2181 Wireless Power Receiver Demo Board NOTE: These boards are not included with DC2181 and must be ordered separately. See last page for details. Figure 2. DC1968A Wireless Power Basic Transmitter Demo Board Figure 3. PowerByProxi ProxiPoint Transmitter dc2181afb 1 DEMO MANUAL DC2181A-A/B Assembly Test Procedure For the proper measurement equipment setup and jumper settings refer to Figure 6a, if you are using the DC1968A wireless power basic transmitter, or Figure 5a, if you are using the PowerByProxi ProxiPoint transmitter. Please follow the checkout procedure, below, to familiarize yourself with the DC2181 demo 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 VCC or VIN and GND terminals. See Figure 4 for proper scope probe technique. 1. Connect power to the transmitter. For the DC1968A basic transmitter set PS1 to 5V, and turn on. For the PowerByProxi ProxiPoint transmitter, plug in the power supply that came with the transmitter. 2. Set PS2 to 3.6V, and turn the supply on. PS2 is the battery emulator battery voltage. The purpose of the 3.6 is to make PS2 into a bipolar supply. Most power supplies can only source current not sink current, bipolar supplies can do both. A bipolar supply is necessary for a battery emulator, as it must absorb the current coming from the charger. By placing a 3.6 resistor in parallel with a normal supply, the supply can absorb up to 1A, at 3.6V. 3. Place the DC2181A receive board on the transmitter as shown in Figure 5c, if you are using the PowerByProxi ProxiPoint transmitter. Or as shown in Figure 6c, if using the DC1968A. Note: for the ProxiPoint transmitter, the LED the ProxiPoint transmitter should change from green to solid red. If the LED turns blinking red, please remove the DC2181A board, wait until the LED turns green, and once again place the DC2181 on the transmitter. If the ProxiPoint transmitter LED does not change to solid red on the second try, please contact your FAE. 4. The green bar graph LEDs on the DC2181 demo board should light. Observe AM1, there is an additional 10mA flowing from the BAT into the bar graph LEDs. Please ensure that VM1 measures less than 4V. If not lower PS2 until it does. The bar graph LEDs indicate the percent of programmed charge current flowing into the battery. They do so by monitoring the PROG voltage. PROG will be 1V, at full programmed charge current. If you lower the battery emulator voltage, by lowering PS2, until VM1 reads approximately 2.9V, you will see the bar graph drop to 10%. This is the trickle current, which is set to 10% of the programmed charge current. 5. Test is complete. Figure 4. Proper Measurement Technique for Measuring Ripple 2 dc2181afb DEMO MANUAL DC2181A-A/B Assembly Test Procedure PS1 - 3.6V POWER SUPPLY 1A - 3.6 + VM1 + AM1 A - V + Figure 5a. DC2181A-A/B Wireless Power Demo Board Connection Figure 5b. PowerByProxi's ProxiPoint Transmitter Figure 5c. DC2181A-A/B Wireless Power Demo Board Mounted on PowerByProxi's ProxiPoint Transmitter Note: All connections from equipment should be Kelvin connected directly to the board pins which they are connected on this diagram and any input or output leads should be twisted pair. dc2181afb 3 DEMO MANUAL DC2181A-A/B Assembly Test Procedure - PS2 3.6V BIPOLAR SUPPLY + 1A - 3.6 VM1 + AM1 A - V + Figure 6a. DC2181A-A/B Wireless Power Demo Board Connection PS1 + 5V POWER SUPPLY 1A - Figure 6b. DC1968A Wireless Power Basic Transmitter Connection Figure 6c. DC2181A-A/B Wireless Power Demo Board Mounted on DC1968A Wireless Power Basic Transmitter Note: All connections from equipment should be Kelvin connected directly to the board pins which they are connected on this diagram and any input or output leads should be twisted pair. 4 dc2181afb DEMO MANUAL DC2181A-A/B Theory of Operation The DC2181A demo board demonstrates operation of a double tuned magnetically coupled resonant power transfer circuit. The DC2181A demo Board must be used in conjunction with either the DC1968A wireless power basic transmitter or the PowerByProxi ProxiPoint transmitter. For theory of operation of the PowerByProxi ProxiPoint transmitter, please refer to the ProxiPoint documentation. DC1968A - Basic Transmitter The DC1968A basic transmitter is used to transmit wireless power and is used in conjunction with the DC2181A wireless power receiver board featuring the LTC4120. The DC1968A is configured as a current fed astable multivibrator, with oscillation frequency set by a resonant tank. The DC1968A basic transmitter is set to 130kHz operation and the DC1967A LTC4120 demonstration board resonant frequency is 127kHz with DHC enabled and 140kHz with DHC disabled. For the DC1968A basic transmitter the resonant components are the 2X 0.15F PPE film capacitors (Cx1 and Cx2) and the 5.0H (Lx) transmit coil (see Schematic: Basic Inductive Transmitter with PreRegulator). This gives a resonant frequency of 129.95kHz. The tolerance on the transmit coil and resonant capacitors is 2%, or 2.6kHz. Inductors L1 and L2 are used to make the resonant structure current fed. The current fed topology makes the peak-to-peak voltage on the resonant tank equal to 2VCC. VCC is 5V, so the peak-to-peak tank voltage is 31.5V, see Figure 7. The blue and green traces are the drains of the transmitter MOSFETs M1 and M2 (see Schematic: Basic Inductive Transmitter with Pre-Regulator), respectively. The red trace is the difference (VCX - VCY) of those two nodes, and shows that the resonant tank is producing a sine wave. The peak-to-peak voltage of 2VCC = 31.5V, results from the current fed topology. This in turn determines the breakdown of the MOSFETs and diodes D2 and D3. To increase transmit power by raising VCC, you must also change M1, M2, D2 and D3, to reflect the higher voltages on the CX and CY nodes. The magnitude of the magnetic field is directly proportional to the current in the transmit coil. For a resonant system this current is Q times the input current. So the higher the Q the larger the magnetic field. Therefore the transmit coil is constructed with Litz wire, and the resonant capacitors are very low dissipation PPS film capacitors. This leads to a Q of approximately 10 at 130kHz, and a circulating current of approximately 6AP-P, at full load. DC2181 - Wireless Power Receiver Board Featuring the LTC4120 The DC2181 LTC4120 wireless power receiver IC implements dynamic harmonization control (DHC), which tunes or detunes the receive circuit to receive more or less power as needed. The primary receive tank is composed of AE1, and C2S, although it must be noted that C2S is AC grounded through C5, the LTC4120 decoupling capacitor, to be in parallel with AE1. C2S also serves to tap power off the resonant circuit and send it to the LTC4120, (see Schematic: 400mA Wireless Synchronous Buck Battery Charger). VCx-Cy 20V/DIV VCx 10V/DIV VCy 10V/DIV 2s/DIV DC2181A F07 Figure 7. DC1968A Basic Transmitter dc2181afb 5 DEMO MANUAL DC2181A-A/B Theory of Operation The waveforms in Figure 8 were captured at a transmitto-receive gap of 8mm. The blue trace is the waveform at the CX pin of the receiver board (see Schematic: 400mA Wireless Synchronous Buck Battery Charger), and the red trace is the charge current into the battery. Although the transmit waveform is a sine wave, the series-parallel connection of the secondary resonant circuit does not yield a sine wave, and this waveform is correct. The charge current into the battery has an average of 400mA, for a delivered power of 1.5W (VBAT = 3.7V). However, 10mA has been diverted to the charge LEDs, for a net battery charge current of 390mA. The ripple on the charge current is synchronous to the transmit waveform. IBAT VBAT = 3.7V 100A/DIV Summary The LTC4120 wireless power receiver IC adjusts the receiver resonant frequency to keep the system from transferring too much power when the coupling is high between transmit and receive coils. The LTC4120 wireless power receiver IC increases power transfer when power transfer is insufficient. This is accomplished by switching capacitors into the resonant circuit using the DHC pin. This gives a much wider operating transmit distance. Figure 9 shows VIN to the LTC4120 and the battery charge current. The blue trace is the charge current into the battery, and the red trace is the voltage at VIN on the receiver board. VIN is about 25V, while the LTC4120 delivers 1.5W at a distance of 8mm, to the battery. There is negligible transmit frequency ripple on VIN, and the voltage is well above the 14V DHC voltage. This indicates that the input rectifiers are operating in peak detect mode, and that DHC is inactive. Cx TO GND 20V/DIV 2s/DIV DC2181A F08 Figure 8. DC2181A Receiver Board DHC When VIN is above 14V, the DHC pin is open and C2P doesn't enhance the energy transfer; this is the detuned state, and the resonant frequency of the receive tank is 142kHz. When VIN falls below 14V, the DHC pin is grounded putting C2P in parallel with both C2S and AE1 thus changing the resonant frequency to 127.4kHz. When the receiver is tuned at 127.4kHz and drawing significant power, the transmit frequency is pulled down to 127kHz. So, at full power the system is now a double-tuned resonant circuit. Figure 10 shows approximate power transfer vs distance between transmitter and receiver. Note the minimum clearance. The minimum is needed to avoid exceeding the maximum input voltage. 6 VIN TO GND 5V/DIV IBAT 100mA/DIV VBAT = 3.7V 2s/DIV DC2181A F09 Figure 9. DC2181A Receiver dc2181afb DEMO MANUAL DC2181A-A/B Theory of Operation AE1, the Receive Antenna The manufacturers can be contacted at: One of the main differences between the DC1967A and the DC2181 demo boards, is that the wireless power receive antenna is separate for the DC2181 demo board. Inter-Technical www.inter-technical.com, search for LTC4120 TDK www.tdk.components.com Wurth http://katalog.we-online.de/pbs/ datasheet/760308101303.pdf Several antennas were tested, with the criteria of passing 2.5W at 8mm spacing. The following table lists the antennas that passed successfully: MANUFACTURER CONSTRUCTION MFG PART NUMBER TDK Ferrite on PCB B67410-A0223-X195 Inter-Technical Ferrite on PCB L41200R01 Inter-Technical Ferrite on PCB L41200R02* Inter-Technical Litz on Ferrite L41200R03 Inter-Technical Litz on Ferrite L41200R04 Inter-Technical Ferrite on PCB L41200R05 TDK Wire on Ferrite WR282830-37M8-LR4 Wurth Wire on Ferrite 760308101303 AE1 is physically mounted with double sided tape, as well as the electrical connection pins. Removing AE1 is likely to damage the ferrite on the backside of the antenna. Only remove AE1 when you have the a suitable replacement at hand. *AE1 wireless power receive antenna shipped with DC2181 1/2 Power 1mm 1/2 Power Envelope Full Power Envelope Full Power 1mm DC1967A-B with 25mm Receive Antenna 9mm 8mm 7mm 6mm 17mm 5mm 4mm 13mm 3mm 18mm 2mm 15mm 1mm Minimum Clearance Transmit Antenna DC2181A F10 Figure 10. Power Transfer vs Axial Distance and Misalignment dc2181afb 7 DEMO MANUAL DC2181A-A/B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2181A General Bill of Materials DC2181A Required Circuit Components 1 1 AE1 RECEIVE ANTENNA INTER-TECHNICAL, L41200R02 2 2 C2S1, C2P1 CAP, CHIP, C0G, 0.0047F, 5%, 50V, 0805 MURATA, GRM2165C1H472JA01D 3 1 C2P2 CAP, CHIP, C0G, 0.0018F, 5%, 50V, 0603 KEMET, C0603C182J5GAC7533 4 1 C2S2 CAP, CHIP, C0G, 0.022F, 5%, 50V, 0805 MURATA, GRM21B5C1H223JA01L 5 1 C1 CAP, CHIP, X5R, 10F, 20%, 16V, 0805 TDK, C2012X5R1C106K 6 1 C2 CAP, CHIP, X5R, 47F, 10%, 16V, 1210 MURATA, GRM32ER61C476KE15L 7 1 C3 CAP, CHIP, X7R, 0.01F, 10%, 50V, 0603 TDK, C1608X7R1H103K 8 1 C4 CAP, CHIP, X5R, 2.2F, 20%, 6.3V, 0402 MURATA, GRM155R60J225ME15D 9 1 C5 CAP, CHIP, X7S, 10F, 20%, 50V, 1210 TDK, C3225X7S1H106M 10 3 D1, D2, D3 DIODE, SCHOTTKY, 40V, 2A, PowerDI123 DIODES, DFLS240L-7 11 1 L1 IND, SMT,15H, 260m, 20%, 0.86A, 4mm x 4mm COILCRAFT, LPS4018-153ML 12 1 R1 RES, CHIP, 1.40M, 1%, 1/16W, 0402 VISHAY, CRCW04021M40FKED 13 1 R2 RES, CHIP, 412k, 1%, 1/16W, 0402 VISHAY, CRCW0402412KFKED 14 2 R3, R7 RES, CHIP, 10k, 1%, 1/16W, 0402 VISHAY, CRCW040210K0FKED 15 1 R5 RES, CHIP, 3.01k, 1%, 1/16W, 0402 VISHAY, CRCW04023K01FKED 16 1 R36 RES, CHIP, 0 JUMPER, 1/16W, 0402 VISHAY, CRCW04020000Z0ED Additional Demo Board Circuit Components 1 3 C6, C8, C9 CAP, CHIP, X7R, 0.01F, 10%, 25V, 0402 TDK, C1005X7R1E103K 2 2 C7, C10 CAP, CHIP, X5R, 1F, 10%, 16V, 0402 TDK, C1005X5R1C105K 3 1 D4 DIODE, ZENER, 39V, 5%, 1W, PowerDI123 DIODES, DFLZ39 4 8 D5, D6, D7, D8, D9, D10, DIODE, LED, GREEN, 0603 D11, D12 LITE-ON, LTST-C193KGKT-5A 5 1 R4 RES, CHIP, 2k, 5%, 1/16W, 0402 VISHAY, CRCW04022K00JNED 6 2 R11, R12 RES, CHIP, 100k, 5%,1/16W, 0402 VISHAY, CRCW0402100KJNED 7 1 R13 RES, CHIP, 10k, 5%, 1/16W, 0402 VISHAY, CRCW040210K0JNED 8 2 R14, R35 RES, CHIP, 432, 1%, 1/16W, 0402 VISHAY, CRCW0402432RFKED 9 2 R15, R33 RES, CHIP, 22.6k, 1%, 1/16W, 0402 VISHAY, CRCW040222K6FKED 10 1 R16 RES, CHIP, 34.8k, 1%, 1/16W, 0402 VISHAY, CRCW040234K8FKED 11 7 R17, R18, R19, R20, R21, R22, R23 RES, CHIP, 100k, 1%, 1/16W, 0402 VISHAY, CRCW0402100KFKED 12 1 R24 RES, CHIP, 49.9k, 1%, 1/16W, 0402 VISHAY, CRCW040249K9FKED 13 8 R25 TO R32 RES, CHIP, 1k, 5%, 1/16W, 0402 VISHAY, CRCW04021K00JNED 14 1 R34 RES, CHIP, 787k, 1%, 1/16W, 0402 VISHAY, CRCW0402787KFKED 15 2 R6, R38 RES, CHIP, 0 JUMPER, 1/16W, 0402 VISHAY, CRCW04020000Z0ED 16 0 R8-OPT, R37-OPT RES, CHIP, 0 JUMPER, 1/16W, 0402 VISHAY, CRCW04020000Z0ED 17 2 U2, U3 ULTRALOW POWER QUAD COMPARATORS WITH REFERENCE, 5mm x 4mm DFN16 LINEAR TECHNOLOGY, LTC1445CDHD 8 dc2181afb DEMO MANUAL DC2181A-A/B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Hardware: For Demo Board Only 1 4 E3, E4, E7, E8 TURRET, 0.091 MILL-MAX, 2501-2-00-80-00-00-07-0 2 4 E1, E2, E5, E6 TURRET, 0.061 MILL-MAX, 2308-2-00-80-00-00-07-0 3 2 J1, J2 HEADER, 1PIN, 0.020 x 0.020 SAMTEC, TMM-101-02-L-S 4 0 J3-OPT CONN, 3 PIN POLARIZED HIROSE, DF3-3P-2DSA 5 2 BP1, BP2, BP3, BP4 CLEAR 0.200 x 0.440 BUMPER KEYSTONE, 785-C 6 0.00058 7 4 ITEM QTY 3M, 0.5IN WIDE, 1/16IN THICK, DOUBLE SIDED FOAM 3M, 4466 TAPE, 0.75IN x 0.50IN PIECE STAND-OFF, NYLON, 0.375 REFERENCE PART DESCRIPTION KEYSTONE, 8832 MANUFACTURER/PART NUMBER DC2181A-A Required Circuit Components 1 0 R9 NO LOAD. SMD 0402 2 1 R10 RES, CHIP, 0 JUMPER, 1/16W, 0402 VISHAY, CRCW04020000Z0ED 3 1 U1 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER, 3mm x 3mm QFN16 LINEAR TECHNOLOGY, LTC4120EUD-4.2 ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC2181A-B Required Circuit Components 1 1 R9 RES, CHIP, 1.40M, 1%, 1/16W, 0402 VISHAY, CRCW04021M40FKED 2 1 R10 RES, CHIP, 1.05M, 1%, 1/16W, 0402 VISHAY, CRCW04021M05FKED 3 1 U1 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER, 3mm x 3mm QFN16 LINEAR TECHNOLOGY, LTC4120EUD dc2181afb 9 DEMO MANUAL DC2181A-A/B Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER DC1968A Bill of Materials DC1968A Required Circuit Components 1 1 CX1, CX2 CAP, CHIP, PPS, 0.15F, 2%, 50V, 6mm x 4.1mm PANASONIC, ECHU1H154GX9 2 2 C4, C5 CAP, CHIP, X7R, 0.01F, 10%, 50V, 0402 MURATA, GRM155R71H103KA88D 3 1 C6 CAP, CHIP, X7R, 4.7F, 10%, 50V, 0402 MURATA, GRM31CR71H475KA12L 4 1 C7 CAP, CHIP, X5R, 0.068F, 10%, 50V, 0603 MURATA, GRM188R71H683K 5 1 C8 CAP, CHIP, C0G, 330pF, 5%, 50V, 0402 TDK, C1005COG1H331J 6 1 C9 CAP, CHIP, X7R, 0.47F, 10%, 25V, 0603 MURATA, GRM188R71E474K 7 1 C10 CAP, CHIP, X5R, 22F, 20%, 6.3V, 0805 TAIYO-YUDEN, JMK212BJ226MG 8 2 D1, D4 DIODE, ZENER, 16V, 350mV, SOT23 DIODES, BZX84C16 9 2 D2, D3 DIODE, SCHOTTKY, 40V, 1A, 2DSN ON SEMICONDUCTOR, NSR10F40NXT5G 10 1 D5 DIODE, SCHOTTKY, 40V, 2A, PowerDI123 DIODES, DFLS240L 11 2 L1, L2 IND, SMT, 68H, 0.41A, 0.40, 20%, 5mm x 5mm TDK, VLCF5028T-680MR40-2 12 1 L3 IND, SMT, 4.7H, 1.6A, 0.125, 20%, 4mm x 4mm COILCRAFT, LPS4018-472M 13 1 Lx TRANSMIT COIL TDK, WT-505060-8K2-LT 14 2 M1, M2 MOSFET, SMT, N-CHANNEL, 60V, 11m, SO8 VISHAY, Si4108DY-T1-GE3 15 1 M3 MOSFET, SMT, P-CHANNEL, -12V, 32m, SOT23 VISHAY, Si2333DS 16 1 M4 MOSFET, SMT, N-CHANNEL, 60V, 7.5, 115mA, SOT23 ON SEMI, 2N7002L 17 2 R1, R2 RES, CHIP, 100, 5%, 1/16W, 0402 VISHAY, CRCW0402100RJNED 18 2 R3, R8 RES, CHIP, 150k, 5%, 1/16W, 0402 VISHAY, CRCW0402150JNED 19 1 R4 RES, CHIP, 40.2k, 1%, 1/16W, 0402 VISHAY, CRCW040240K2FKED 20 1 R5 RES, CHIP, 20k, 1%, 1/16W, 0402 VISHAY, CRCW040220K0FKED 21 2 R6, R10 RES, CHIP, 100k, 1%, 1/16W, 0402 VISHAY, CRCW0402100KFKED 22 1 R7 RES, CHIP, 536k, 1%, 1/16W, 0402 VISHAY, CRCW0402536KFKED 23 1 U1 LT3480EDD, PMIC 38V, 2A, 2.4MHz STEP-DOWN SWITCHING LINEAR TECHNOLOGY, LT3480EDD REGULATOR WITH 70A QUIESCENT CURRENT Additional Demo Board Circuit Components 1 0 CX3-OPT, CX4-OPT CAP, PPS, 0.15F, 2.5%, 63VAC, MKS02 WIMA, MKS0D031500D00JSSD 2 1 D6 LED, GREEN, 0603 LITE-ON, LTST-C190KGKT 3 1 R9 RES, CHIP, 1k, 5%, 1/16W, 0402 VISHAY, CRCW04021K00JNED TURRET, 0.09 DIA MILL-MAX, 2501-2-00-80-00-00-07-0 STAND-OFF, NYLON, 0.375 KEYSTONE, 8832 Hardware: For Demo Board Only 1 6 2 4 10 E1 TO E6 dc2181afb 1 2 3 4 PROG NTC GND Cx E2 E1 J2 J1 AE1 J2 J1 5% R4 2.0k 4 VPROG C2P1 4700pF 5% 50V 0805 C2S1 4700pF 5% 50V 0805 NOTE: PCB AE1 CONNECTS TO J1 AND J2 FIGURE 1. 4 C2P2 1800pF 5% 50V 0603 C2S2 0.022F 5% 50V 0805 D2 DFLS240L D1 DFLS240L R36 0 R37 0 OPT 3 R7 10k 13 10 12 6 7 16 PROG BATSNS/FB NTC DHC FREQ RUN C5 10F 50V 1210 IN 17 GND -B ASSY -A * 11 9 8 4 2 1 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE L1 15.0uH R12 100k 5% 6.3V C4 2.2F INTVCC TECHNOLOGY R10 0 Ohm 1.05MEG DATE 7 - 17 - 14 FAULT VBAR CHRG 1 2 3 J3 OPT DF3-3P-2DSA BAT GND ENTC BAT 2.7 V - 4.2V C2 400mA 47uF 16V 1210 E3 GND E4 E5 E6 GND VIN 12V - 40V E7 E8 GEORGE B. DATE: N/A SIZE 1 SHEET LTC4120EUD - 4.2 / LTC4120EUD DEMO CIRCUIT 2181A - A / B 7 - 17 - 14 I C NO. 1 OF 3 2 REV. 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER TITLE: SCHEMATIC LTC4120EUD R9 OPEN 1.40MEG R10 * U1 R9 * APPROVED 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only PRODUCTION 3 R11 100k 5% DESCRIPTION REV R10 TO BE CONNECTED TO " BAT " NODE AT BAT TURRET (E4) C1 10uF 16V 0805 0603 C3 0.01F - ECO 1 REVISION HISTORY LTC4120EUD - 4.2 APPROVALS NC/FBG BAT CHGSNS SW BOOST INTVCC FAULT CHRG 15 14 U1 3 LTC4120EUD-4.2 / LTC4120EUD 2 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. NC VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. GEORGE B. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CUSTOMER NOTICE 5 GND D4 DFLZ39 39V UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V EXT INT R5 3.01k R8 0 OPT 10k R3 INTVCC 412k R2 RUN FOR VIN > 11V R1 1.40MEG R6 0 DO *NOT* INSTALL R36 AND R37 SIMULTANEOUSLY 750 kHz 1.5 MHz D3 DFLS240L INTVCC 3 1 2 3 4 DEMO MANUAL DC2181A-A/B Schematic Diagram 11 dc2181afb 1.221V LTC1445CDHD U2E VPROG 8 V-REF 9 5% R13 10k C7 1F 10V R14 432 0 R38 49.9k R24 R23 100k R22 100k R21 100k R20 100k R19 100k R18 100k R17 100k 34.8k R16 R15 22.6k C6 0.01F C8 0.01F U3.3 C9 0.01F U2.3 787k R34 R33 22.6k C10 1F 10V 432 R35 LTC1445CDHD U3D U3C LTC1445CDHD U3B LTC1445CDHD 1.186V U3A LTC1445CDHD U2D LTC1445CDHD LTC1445CDHD U2C 1.186V LTC1445CDHD U2B LTC1445CDHD U2A 12 13 10 11 6 7 4 5 12 13 10 11 6 7 4 5 8 V-REF 12 9 VBAR 15 16 1 2 15 16 1 2 LTC1445CDHD U3E 149 17 3 149 17 3 149 17 3 149 17 3 149 17 3 149 17 3 149 17 3 149 17 3 D5 D6 D7 D8 D9 D10 D11 D12 2 2 2 2 2 2 2 2 6% 19% 31% 44% 56% 69% 81% 94% CHG CURRENT THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE 1 1 1 1 1 1 1 1 SCALE = NONE GEORGE B. NC APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 5% R25 1k 5% R26 1k 5% R27 1k 5% R28 1k 5% R29 1k 5% R30 1k 5% R31 1k 5% R32 1k TECHNOLOGY SHEET LTC4120EUD - 4.2 / LTC4120EUD DEMO CIRCUIT 2181A - A / B 7 - 17 -14 IC NO. 2 BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER DATE: N/A SIZE TITLE: SCHEMATIC OF 3 2 REV. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V DEMO MANUAL DC2181A-A/B Schematic Diagram dc2181afb 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. 1 2 3 4 VCC GND E4 E3 4.75V - 5.25V GND E2 HVIN 8V - 38V C7 0.068uF 50V 0603 5% R3 150k C6 4.7uF 50V 1206 4 R4 40.2k 4 RT FB 8 SYNC RUN/SS 10 6 5 4 11 GND VIN Vc PG SW BOOST BD 9 7 3 2 1 U1 LT3480EDD 5% C8 330pF R5 20k C9 0.47uF 25V 0603 1 L3 4.7uH R9 1K 5% D6 ON D5 DFLS240L 40V 2A 3 3 M1 Si4108DY-T1-GE3 2 E1 321 5678 R6 100k R7 536k 4 1 5% R8 150k 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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. SCALE = NONE APP ENG. 4 123 8765 - ECO TECHNOLOGY DAT E Cx Cy 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only E5 Lx 5.0uH 5% E6 9 - 17 - 13 9 - 17 - 13 IC NO. 1 LTC4120EUD-4.2 / LTC4120EUD DEMO CIRCUIT 1968A SHEET 1 OF 1 3 REV. BASIC INDUCTIVE TRANSMITTER WITH PRE - REGULATOR DATE: N/A SIZE Cx4 0.15uF 2.5% MKS02 OPT GEORGE B. APPROVED UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V M2 Si4108DY-T1-GE3 Cx2 0.15uF 2% FC6041 Cx3 0.15uF 2.5% MKS02 OPT DESCRIPTION PRODUCTION FAB 3 Cx1 0.15uF 2% FC6041 1 REVISION HISTORY REV NC GEORGE B. TITLE: SCHEMATIC APPROVALS D4 BZX84C16 16V PCB DES. 5% 100 C5 0.01uF 100 5% L2 68uH D3 NSR10F40NXT5G M3 Si2333DS R2 M4 2N7002L 2 3 R1 2 3 R10 100k 1 CUSTOMER NOTICE D1 BZX84C16 16V C4 0.01uF D2 NSR10F40NXT5G L1 68uH 6.3V 0805 20% C10 22uF 5V OUT 2 1 2 3 4 DEMO MANUAL DC2181A-A/B Schematic Diagram dc2181afb 13 DEMO MANUAL DC2181A-A/B The DC1968A Basic Wireless Transmitter is available from Linear Technology as part of the DC1969A-B Wireless Power Kit. To obtain the DC1968A Basic Wireless Transmitter, please order the DC1969A-B kit. The ProxiPoint Transmitters are available from PowerByProxy: www.powerbyproxi.com/evaluation-kits/proxi-point/ 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 (c) 2004, Linear Technology Corporation 14 Linear Technology Corporation dc2181afb LT 0815 REV B * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2014