DEMO MANUAL DC1969A-A/DC1969A-B LTC4120EUD-4.2/LTC4120EUD Wireless Power Receiver and 400mA Buck Battery Charger DESCRIPTION Demonstration circuit DC1969A is a kit of: the DC1967A‑A/B LTC®4120EUD demonstration board, the DC1968A basic wireless transmitter, a 35mm receiver ferrite disk, and an assortment of different length standoffs. The basic transmitter can deliver 2W to the receive board with up to 10mm spacing between the transmit and the receive coils. The basic transmitter does not support foreign object detection, i.e. coins or other metallic objects. Design files for this circuit board are available at http://www.linear.com/demo/DC1969A 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. CONTENTS n n n n n n 1X DC1967A-A/B (LTC4120EUD) Demo Board 1X DC1968A (Wireless Basic Transmitter) Demo Board 1X 35mm Ferrite Bead 4X 6.25mm (0.25") Nylon Standoffs 4X 12.5mm (0.50") Nylon Standoffs 4X 15.875mm (0.625") Nylon Standoffs Kit Build Options KIT NUMBER Tx BOARD Rx BOARD DC1969A-A DC1968A DC1967A-A DC1969A-B DC1968A DC1967A-B Receiver Board Build Options Rx BOARD PART NUMBER FUNCTION DC1967A-A LTC4120EUD-4.2 Fixed 4.2V Float Voltage DC1967A-B LTC4120EUD Adjustable Float Voltage PERFORMANCE SUMMARY Specifications are at TA = 25°C SYMBOL PARAMETER CONDITIONS HVIN DC1968A High Voltage Input Voltage Range IHVIN ≤ 500mA at HVIN = 8V VCC DC1968A VCC Input Range IVCC = 0mA to 700mA VBAT DC1967A BAT Pin Voltage R9 = 1.40MΩ, R10 = 1.05MΩ 2.5 IBAT DC1967A BAT Pin Current VBAT = 3.7V, DC1967A(R5) = 3.01kΩ 370 Figure 1. DC1968A Basic Transmitter Board MIN TYP MAX UNITS 8 38 V 4.75 5.25 V 385 4.25 V 400 mA Figure 2. DC1967A-B LTC4120 Receiver Board dc1969aabfb 1 DEMO MANUAL DC1969A-A/DC1969A-B DEMO BOARD PROCEDURE Refer to Figure 7 for the proper measurement equipment setup and jumper settings and follow the procedure below. Please test DC1968A first, by itself. 4. Connect a bipolar1 supply (PS3) to the DC1967A demo board BAT pin. Set the supply to 3.7V and turn on. Observe AM3. 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 8 for proper scope probe technique. 5. Place the DC1967A board atop the DC1968A board, by aligning: 1. Set PS1 = 36V, observe VCC (VM1) and IHVIN AM1. The DC1968A can be powered by 5V on the VCC pin or up to 38V on the HVIN pins. The HVIN pins are connected to an LT3480 buck regulator that makes 5V at the VCC pins. Standby power in the DC1968A basic transmitter varies between 0.5W and 0.6W, for a VCC current at 5V of 100mA ~ 130mA. If the DC1968A is powered via the HVIN pins then this current is scaled by the ratio 5V/ [VHVIN × 0.92], where 0.92 is efficiency of the regula‑ tor. So the standby HVIN current is approximately 5.5/ [VHVIN × (100mA ~ 130mA)]. 2. Remove PS1, VM1 and AM1. Attach PS2 and AM2. 3. Set PS2 to 5V, and observe AM2. The transmitter is being powered directly with no intervening buck regulator, so the standby current should be between 100mA ~ 130mA. DC1967A Mounting Hole DC1968A Mounting Hole MH1 => MH1 MH2 => MH2 MH3 => MH3 MH4 => MH4 This should result in the transmit antenna being directly above the receive antenna, with the centers aligned. Observe AM2 and AM3. All the charge LEDs on the DC1967A should now be lit. AM2 should have increased from 100mA ~ 130mA to about 600mA. AM3 should be reading 380mA ~ 400mA of charge current into the battery emulator. Figure 6 shows the approximate full power (400mA of charge current into 4.15V ≈ 1.7W) and half power contours. 1 A bipolar supply can both sink and source current to maintain the correct output voltage. A unipolar supply can be converted into a suitable bipolar supply by putting a 3.6Ω, 10W, resistor across the output. THEORY OF OPERATION The DC1969A kit demonstrates operation of a double tuned magnetically coupled resonant power transfer circuit. DC1968A – Basic Transmitter The DC1968A Basic Transmitter is used to transmit wire‑ less power and is used in conjunction with the DC1967A wireless power receiver board featuring the LTC4120. The DC1968A is configured as a current fed astable multi‑ vibrator, with oscillation frequency set by a resonant tank. 2 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 0.15µF PPE film capaci‑ tors (Cx1 and Cx2) and the 5.0µH (Lx) transmit coil. 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. dc1969aabfb DEMO MANUAL DC1969A-A/DC1969A-B THEORY OF OPERATION IBAT VBAT = 3.7V 100µA/DIV VCx-Cy 20V/DIV VCx 10V/DIV Cx TO GND 20V/DIV VCy 10V/DIV 2µs/DIV DC1969A F03 2µs/DIV DC1969A F04 Figure 3. DC1968A Basic Transmitter Figure 4. DC1967A Receiver The current fed topology makes the peak-to-peak voltage on the resonant tank equal to 2πVCC. VCC is 5V, so the peak-to-peak tank voltage is 31.5V, see Figure 3. The waveforms in Figure 4 were captured at a transmit to receive gap of 8mm. The blue trace is the waveform at the CX pin of the receiver board (Figure 10), and the red trace is the charge current into the battery. Although the transmit waveform is a sine wave, the series-parallel con‑ nection 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, 20mA has been diverted to the charge LEDs, for a net battery charge current of 380mA. The ripple on the charge current is synchronous to the transmit waveform. The blue and green traces are the drains of the transmitter MOSFETs M1 and M2 (see Figure 12), 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 2πVCC = 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. DC1967A – Wireless Power Receiver Board Featuring the LTC4120 The 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 Lr, and C2S, although it must be noted that C2S is ac grounded through C5, the LTC4120 decoupling capacitor, to be in parallel with Lr. C2S also serves to tap power off the resonant circuit and send it to the LTC4120, see Figure 4. 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 Lr 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 6 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. 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 dc1969aabfb 3 DEMO MANUAL DC1969A-A/DC1969A-B THEORY OF OPERATION and receive coils. The LTC4120 wireless power receiver IC increases power transfer when power transfer is insuf‑ ficient. This is accomplished by switching capacitors into the resonant circuit using the DHC pin. This gives a much wider operating transmit distance, see Figure 5. VIN TO GND 5V/DIV IBAT VBAT = 3.7V 100mA/DIV DC1969A F05 2µs/DIV Figure 5. DC1967A Receiver 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. 35mm Ferrite Disk The DC1969A-A/DC1969A-B kit includes a 35mm ferrite disk. The purpose of this disk is to increase the power received by the DC1967A-A/DC1967A-B receiver board. The 25mm ferrite disk that is shipped and attached to the DC1967A-A/DC1967A-B board is attached with doublesided tape, and is likely to break if removed. Laying the 35mm ferrite on top of the shipped 25mm ferrite disc will increase received power approximately 30%. Removing the 25mm ferrite disk and attaching the 35mm disk will increase received power approximately 20%. In both cases the minimum clearance distance will increase to approximately 3mm. Since the 25mm ferrite disk shipped on the DC1967A-A/DC1967A-B board is likely to break, exchanging disks can only be done once. ½ Power ±1mm ½ 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 DC1969A F06 Figure 6. Power Transfer vs Axial Distance and Misalignment 4 dc1969aabfb DEMO MANUAL DC1969A-A/DC1969A-B THEORY OF OPERATION PS1 8V to 38V Supply 1A + + – AM1 – + VM1 – Figure 7a. Using High Voltage Input PS2 5V Supply 1A + – + – AM2 Figure 7b. Using the VCC Input PS3 3.7V Bipolar Supply 1A + + – AM3 – Figure 7c. Receive Board with Battery Emulator Figure 7 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. dc1969aabfb 5 DEMO MANUAL DC1969A-A/DC1969A-B THEORY OF OPERATION GND VIN Figure 8. Measuring Input or Output Ripple 60 50 CISPR 11 CLASS A LIMIT 40 CISPR 11 CLASS B LIMIT dBµV/m 30 1968A AND 1967A-B 20 10 1968A ONLY 0 1968A AND 1967A-B AND BATT –10 –20 10 100 FREQUENCY (MHz) GTEM CELL MEASUREMENT CORRECTED PER IEC 61000-4-20 TO 10m DETECTOR = PEAK HOLD RBW = 120kHz VBW = 300kHz SWEEP TIME = 680ms # OF POINTS = 501 # OF SWEEPS ≥ 10 1,000 DC1969A F09 Figure 9. LTC4120 (DC1968A and DC1967A-B) Radiated Emissions Radiated Emissions Radiated emissions information was gathered using a gigahertz transverse electromagnetic (GTEM) cell. The GTEM cell dimensions were 0.2m × 0.2m × 0.15m. The data was normalized to a 10m semi-anechoic chamber (SAC) per IEC61000-4-20 using peak hold detection. The limits shown on the graph are for CISPR 11 class A (yellow) and class B (red). The CISPR 11 limits are ap‑ plicable to industrial commercial and medical equipment. The emissions detection method was peak hold of the square root of the sum of the emissions from each face, X, Y, Z, squared. As the emissions are always at least 6dB from the regulatory limits, the use of quasi-peak detec‑ tion was not necessary. Data was gathered on a single representative system. 6 The blue line shape is data gathered from a DC1968A basic transmitter operating alone and powered at VCC = 5V from a bench supply. The yellow line shape is data gathered from a DC1968A basic transmitter powered at VCC = 5V from a bench supply, and energizing a DC1967A LTC4120 wireless power receive board with no battery. And the green line shape is data gathered from a DC1968A basic transmitter powered at VCC = 5V from a bench supply, and energizing a DC1967A LTC4120 wireless power receive board charging a Li-Ion battery at 400mA. The LTC4120 wireless power system is intended to be a part of a complete end product. Only the complete end product needs to be FCC certified. The data presented here on the wireless power system is for end product design purposes only, not to obtain FCC certification. dc1969aabfb DEMO MANUAL DC1969A-A/DC1969A-B PARTS LIST ITEM QTY REFERENCE DC1967A Required Circuit Components 1 2 C2S1, C2P1 2 1 C2P2 3 1 C2S2 4 1 C1 5 1 C2 6 1 C3 7 1 C4 8 1 C5 9 3 D1, D2, D3 10 1 D4 11 1 FB1 12 0 Lr 13 1 L1 14 1 R1 15 1 R2 16 2 R3, R7 R5 17 1 18 2 R6, R8 Additional Demo Board Circuit Components 1 2 C7, C10 2 3 C6, C8, C9 3 8 D5, D6, D7, D8, D9, D10, D11, D12 1 R4 4 5 2 R11, R12 6 1 R13 7 2 R14, R35 8 2 R15, R33 9 1 R16 10 7 R17, R18, R19, R20, R21, R22, R23 11 1 R24 12 8 R25, R26, R27, R28, R29, R30, R31, R32 13 1 R34 14 2 U2, U3 Hardware For Demo Board Only 1 6 E1, E2, E5, E6, E9, E10 2 4 E3, E4, E7, E8 3 0 J1-OPT 4 4 JP1, JP3-JP5 5 1 JP2 6 5 JP1-JP5 7 4 PART DESCRIPTION MANUFACTURER/PART NUMBER CAP, CHIP, C0G, 0.0047µF, ±5%, 50V, 0805 CAP, CHIP, C0G, 0.0018µF, ±5%, 50V, 0603 CAP, CHIP, C0G, 0.022µF,±5%, 50V, 0805 CAP, CHIP, X5R, 10µF, ±20%, 16V, 0805 CAP, CHIP, X5R, 47µF, ±10%, 16V, 1210 CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0603 CAP, CHIP, X5R, 2.2µF, ±20%, 6.3V, 0402 CAP, CHIP, X7S, 10µF, ±20%, 50V, 1210 DIODE, SCHOTTKY, 40V, 2A, PowerDI123 DIODE, Zener, 39V, ±5%, 1W, PowerDI123 25mm Ferrite Bead IND, EMBEDDED, 47µH, 43 turns IND, SMT, 15µH, 260mΩ, ±20%, 0.86A, 4mm × 4mm RES, CHIP, 1.40M, ±1%, 1/16W, 0402 RES, CHIP, 412kΩ, ±1%, 1/16W, 0402 RES, CHIP, 10kΩ, ±1%, 1/16W, 0402 RES, CHIP, 3.01kΩ, ±1, 1/16W, 0402 RES, CHIP, 0Ω JUMPER, 1/16W, 0402 MURATA, GRM2165C1H472JA01D KEMET, C0603C182J5GAC7533 MURATA, GRM21B5C1H223JA01L TDK, C2012X5R1C106K MURATA, GRM32ER61C476KE15L TDK, C1608X7R1H103K MURATA, GRM155R60J225ME15D TDK, C3225X7S1H106M DIODES, DFLS240L DIODES, DFLZ39 ADAMS MAGNETICS, B67410-A0223-X195 EMBEDDED LPS4018-153ML VISHAY, CRCW04021M40FKED VISHAY, CRCW0402412KFKED VISHAY, CRCW040210K0FKED VISHAY, CRCW04023K01FKED VISHAY, CRCW04020000Z0ED CAP, CHIP, X5R, 1µF, ±10%, 16V, 0402 CAP, CHIP, X7R, 0.01µF, ±10%, 25V, 0402 DIODE, LED, GREEN, 0603 TDK, C1005X5R1C105K TDK, C1005X7R1E103K LITE-ON, LTST-C193KGKT-5A RES, CHIP, 2kΩ, ±5%, 1/16W, 0402 RES, CHIP, 100kΩ, ±5%, 1/16W, 0402 RES, CHIP, 10kΩ, ±5%, 1/16W, 0402 RES, CHIP, 432Ω, ±1%, 1/16W, 0402 RES, CHIP, 22.6kΩ, ±1%, 1/16W, 0402 RES, CHIP, 34.8kΩ, ±1%, 1/16W, 0402 RES, CHIP, 100kΩ, ±1%, 1/16W, 0402 VISHAY, CRCW04022K00JNED VISHAY, CRCW0402100KJNED VISHAY, CRCW040210K0JNED VISHAY, CRCW0402432RFKED VISHAY, CRCW040222K6FKED VISHAY, CRCW040234K8FKED VISHAY, CRCW0402100KFKED RES, CHIP, 49.9kΩ, ±1%, 1/16W, 0402 RES, CHIP, 1kΩ, ±5%, 1/16W, 0402 VISHAY, CRCW040249K9FKED VISHAY, CRCW04021K00JNED RES, CHIP, 787kΩ, ±1%, 1/16W, 0402 Ultralow Power Quad Comparators with Reference, 5mm × 4mm DFN-16 VISHAY, CRCW0402787KFKED LINEAR TECH., LTC1445CDHD TURRET, 0.091" TURRET, 0.061" CONN, 3 Pin Polarized HEADER, 3 Pin, SMT, 2mm HEADER, 4 Pin, SMT, 2mm SHUNT, 2mm CLEAR 0.085" × 0.335" BUMPER MILL-MAX, 2501-2-00-80-00-00-07-0 MILL-MAX, 2308-2-00-80-00-00-07-0 HIROSE, DF3-3P-2DSA SAMTEC, TMM-103-01-L-S-SM SAMTEC, TMM-104-01-L-S-SM SAMTEC, 2SN-BK-G KEYSTONE, 784-C dc1969aabfb 7 DEMO MANUAL DC1969A-A/DC1969A-B PARTS LIST ITEM QTY REFERENCE 8 15 4 9 DC1967A-A Required Circuit Components 1 0 R9 2 1 R10 3 1 U1 DC1967A-B Required Circuit Components 1 1 R9 2 1 R10 3 1 U1 DC1968A Required Circuit Components 1 1 CX1, CX2 2 2 C4, C5 3 1 C6 4 1 C7 5 1 C8 6 1 C9 7 1 C10 8 2 D1, D4 2 D2, D3 9 10 1 D5 11 2 L1, L2 12 1 L3 13 1 Lx 2 M1, M2 14 15 1 M3 16 1 M4 17 2 R1, R2 18 2 R3, R8 19 1 R4 20 1 R5 21 2 R6, R10 22 1 R7 23 1 U1 Additional Demo Board Circuit Components 1 0 CX3-OPT, CX4-OPT 2 1 D6 3 1 R9 Hardware For Demo Board Only 6 E1-E6 1 2 40 3 4 8 PART DESCRIPTION 15mm DOUBLE SIDED TAPE STAND-OFF, NYLON, 0.375" MANUFACTURER/PART NUMBER 3M, 34-8705-5578-5 KEYSTONE, 8832 NO LOAD. SMD 0402 RES, CHIP, 0Ω JUMPER, 1/16W, 0402 400mA Wireless Synchronous Buck Battery Charger, 3mm × 3mm QFN-16 VISHAY, CRCW04020000Z0ED LINEAR TECH., LTC4120EUD-4.2 RES, CHIP, 1.40M, ±1%, 1/16W, 0402 RES, CHIP, 1.05M, ±1%, 1/16W, 0402 400mA Wireless Synchronous Buck Battery Charger, 3mm × 3mm QFN-16 VISHAY, CRCW04021M40FKED VISHAY, CRCW04021M05FKED LINEAR TECH., LTC4120EUD CAP, CHIP, PPS, 0.15µF, ±2%, 50V, 6.0mm × 4.1mm CAP, CHIP, X7R, 0.01µF, ±10%, 50V, 0402 CAP, CHIP, X5R, 4.7µF, ±10%, 50V, 1206 CAP, CHIP, X5R, 0.068µF, ±10%, 50V, 0603 CAP, CHIP, C0G, 330pF, ±5%, 50V, 0402 CAP, CHIP, X7R, 0.47µF, ±10%, 25V, 0603 CAP, CHIP, X5R, 22µF, ±20%, 6.3V, 0805 DIODE, ZENER, 16V, 350mW, SOT23 DIODE, SCHOTTKY, 40V, 1A, 2DSN DIODE, SCHOTTKY, 40V, 2A, PowerDI123 IND, SMT, 68µH, 0.41A, 0.40Ω, ±20%, 5mm × 5mm IND, SMT, 4.7µH, 1.6A, 0.125Ω, ±20%, 4mm × 4mm TRANSMIT COIL MOSFET, SMT, N-CHANNEL, 60V, 11mΩ, SO8 MOSFET, SMT, P-CHANNEL, -12V, 32mΩ, SOT23 MOSFET, SMT, N-CHANNEL, 60V, 7.5Ω, 115mA, SOT23 RES, CHIP,100Ω, ±5%, 1/16W, 0402 RES, CHIP, 150kΩ, ±5%, 1/16W, 0402 RES, CHIP, 40.2kΩ, ±1%, 1/16W, 0402 RES, CHIP, 20kΩ, ±1%, 1/16W, 0402 RES, CHIP, 100kΩ, ±1%, 1/16W, 0402 RES, CHIP, 536kΩ, ±1%, 1/16W, 0402 LT3480EDD, PMIC 38V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current PANASONIC, ECHU1H154GX9 MURATA, GRM155R71H103KA88D MURATA,GRM31CR71H475KA12L MURATA, GRM188R71H683K TDK, C1005C0G1H331J MURATA,GRM188R71E474K TAIYO-YUDEN,JMK212BJ226MG DIODES, BZX84C16 ON SEMICONDUCTOR, NSR10F40NXT5G DIODES, DFLS240L TDK, VLCF5028T-680MR40-2 COILCRAFT, LPS4018-472M TDK, WT-505060-8K2-LT VISHAY, Si4108DY-T1-GE3 VISHAY, Si2333DS ON SEMI, 2N7002L VISHAY, CRCW0402100RJNED VISHAY, CRCW0402150JNED VISHAY, CRCW040240K2FKED VISHAY, CRCW040220K0FKED VISHAY, CRCW0402100KFKED VISHAY, CRCW0402536KFKED LINEAR TECH., LT3480EDD CAP, PPS, 0.15µF, ±2.5%, 63Vac, MKS02 LED, GREEN, 0603 RES, CHIP, 1kΩ, ±5%, 1/16W, 0402 WIMA, MKS0D031500D00JSSD LITE-ON, LTST-C190KGKT VISHAY, CRCW04021K00JNED TURRET, 0.09 DIA 40mm DOUBLE SIDED TAPE STAND-OFF, NYLON, 0.375" MILL-MAX, 2501-2-00-80-00-00-07-0 3M, 34-8705-5578-5 KEYSTONE, 8832 dc1969aabfb 1 2 3 4 PROG E4 E3 E2 E1 NTC GND Cx 5% R4 2.0k 4 VPROG Lr 47µH Embedded Inductor 43T CONNECTED DISCONNECTED EMBEDDED INDUCTOR 4 JP1 C2P1 4700pF 5% 50V 0805 C2S1 4700pF 5% 50V 0805 C2P2 1800pF 5% 50V 0603 C2S2 0.022µF 5% 50V 0805 D2 DFLS240L D1 DFLS240L D3 DFLS240L 3 3 R7 10k R6 0 EXT R5 3.01k PROG BATSNS/FB 10 13 NTC DHC FREQ RUN 12 6 7 16 5 GND 3 IN 17 GND THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 C5 10µF 50V 1210 -B ASSY -A * 11 9 8 4 2 1 15 14 R12 100k 5% 6.3V C4 2.2µF INTVCC NC GEORGE B. APP ENG. TECHNOLOGY VIN GND 1 2 3 DF3-3P-2DSA BAT GND ENTC J1 OPT BAT 2.7 V - 11V C2 400mA 47uF 16V 1210 E5 GND VBAR nCHRG nFAULT E6 E7 E8 E9 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 0 Ohm 1.05MEG R10 R8 0 DATE 9 - 17- 13 5V - 40V E10 GEORGE B. APPROVED DATE: N/A SIZE 1 SHEET 1 LTC4120EUD - 4.2 / LTC4120EUD DEMO CIRCUIT 1967A - A / B 9 - 17 - 13 IC NO. OF 2 2 REV. 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER TITLE: SCHEMATIC LTC4120EUD R9 R10 * OPEN 1.40MEG R9 * U1 PCB DES. SCALE = NONE L1 15.0uH R11 100k 5% PRODUCTION FAB 2 1 DESCRIPTION REVISION HISTORY REV R10 TO BE CONNECTED TO " BAT " NODE AT BAT TURRET (E6) C1 10uF 16V 0805 0603 C3 0.01µF - ECO LTC4120 - 4.2EUD APPROVALS NC/FBG BAT CHGSNS SW BOOST INTVCC FAULT CHRG U1 LTC4120EUD-4.2 / LTC4120EUD 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. CUSTOMER NOTICE UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V 1.5 MHz 750 kHz JP3 FREQ R2 412k D4 DFLZ39 39V Figure 10. DC1967A Circuit Schematic INT JP4 NTC 10k R3 INTVCC JP2 RUN ON VIN > 11V OFF R1 1.40MEG 2 1 2 3 4 DEMO MANUAL DC1969A-A/DC1969A-B SCHEMATIC DIAGRAM dc1969aabfb 9 1 2 3 8 V-REF 9 4 JP5 ENABLE 1.221V LTC1445CDHD U2E VPROG VBAR C7 1µF 10V R14 432 5% DISABLE R13 10k 4 4 R24 49.9k R23 100k R22 100k R21 100k R20 100k R19 100k R18 100k R17 100k R16 34.8k R15 22.6k C6 0.01µF C8 0.01µF U3.3 C9 0.01µF U2.3 787k R34 R33 22.6k 3 C10 1µF 10V R35 432 LTC1445CDHD U3D U3C LTC1445CDHD U3B LTC1445CDHD 1.186V U3A LTC1445CDHD U2D LTC1445CDHD LTC1445CDHD U2C 1.186V LTC1445CDHD U2B LTC1445CDHD U2A 3 12 13 10 11 6 7 4 5 12 13 10 11 6 7 4 5 8 V-REF 10 9 MONITOR 15 16 1 2 15 16 1 2 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 2 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 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. 5% R25 1k 5% R26 1k 5% R27 1k 5% R28 1k 5% R29 1k 5% R30 1k 5% R31 1k 5% R32 1k 2 GEORGE B. SCALE = NONE NC PCB DES. APP ENG. APPROVALS Figure 11. DC1967A Circuit Schematic 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 TECHNOLOGY 1 SHEET 2 LTC4120EUD - 4.2 / LTC4120EUD DEMO CIRCUIT 1967A-A/B 9 - 17 - 13 IC NO. BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER DATE: N/A SIZE TITLE: SCHEMATIC OF 2 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 1 1 2 3 4 DEMO MANUAL DC1969A-A/DC1969A-B SCHEMATIC DIAGRAM dc1969aabfb 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 representa‑ tion 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 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 DATE Cx E5 Cy Lx 5.0uH 5% E6 9 - 17 - 13 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 M2 Si4108DY-T1-GE3 Cx2 0.15uF 2% FC6041 Cx4 0.15uF 2.5% MKS02 OPT GEORGE B. APPROVED 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 Cx1 0.15uF 2% FC6041 Cx3 0.15uF 2.5% MKS02 OPT PRODUCTION FAB 3 1 DESCRIPTION REVISION HISTORY REV NC GEORGE B. TITLE: SCHEMATIC APPROVALS D4 BZX84C16 16V PCB DES. 5% R2 C5 0.01uF 100 5% L2 68uH D3 NSR10F40NXT5G M3 Si2333DS R1 M4 2N7002L 2 3 100 2 3 R10 100k 1 CUSTOMER NOTICE D1 BZX84C16 16V C4 0.01uF D2 NSR10F40NXT5G L1 68uH 6.3V 0805 20% C10 22uF Figure 12. DC1968A Circuit Schematic 321 5678 R6 100k R7 536k 5V OUT 2 1 2 3 4 DEMO MANUAL DC1969A-A/DC1969A-B SCHEMATIC DIAGRAM dc1969aabfb 11 DEMO MANUAL DC1969A-A/DC1969A-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 applica‑ tion engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation 12 Linear Technology Corporation dc1969aabfb LT 0215 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