QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC512B 4A SMART BATTERY CHARGER LTC4100 DESCRIPTION Demonstration circuit DC512B is a single battery switching step-down charge controller featuring the LTC4100. The recommended input power is 15 to 20V at 3.5A. A two-position jumper allows choice of protected output voltage range suitable for 3- and 4-Cell Li-ion batteries. Removal of the jumper allows full output voltage range. The maximum charge current is 4A. The demo board is initially configured for 12.6V at 3A for popular 3-cell Li-ion battery packs. LTC4100 will automatically charge a Smart Battery to termination as soon as input power is applied with a battery connected prior to power up. A VOUT pin automatically provides Performance Summary power to the system load from the wall adapter or battery. Status LEDs are provided for CHG, ACP, SMBALERT and SMBus activity. The optional DC1223A-B SMBUS to USB adapter and associated software to control, monitor, and data log the system for demonstration purposes only. This software is not required to charge a battery with the DC512B. Contact your LT representative for ordering a DC1223A-B. Design files for this circuit board are available at http://www.linear.com/demo TA = 25C PARAMETER CONDITIONS / NOTES VALUE Input Voltage Range ACP Trip voltage Input Current Limit Battery Voltage Limit VIN > VBAT to charge. Limited by input capacitor ratings. VDCDIV Rising 15 - 25V 14.6V 3% 3.5A 7% 13.104VBAT, Typ. 17.408VBAT, Typ. 28.006, Typ. 0.8% 16mV 2048 steps 82.3mV, Max 107.3mV, Max 5%, 3% is typical 4mA 1024 Steps Programmable Float Voltage Accuracy Minimum Voltage Step # of Voltage Steps Battery Current Sense Voltage Limit Programmable Charge Current Accuracy Minimum Current Step # of Current Steps 3CELL (RVILIM = 10k 1%) 4CELL (RVILIM = 33k 1%) RVILIM OPEN All VLIM Settings 11-Bit range 3A (RILIM = 33k 1%) 4A (RILIM OPEN) 3A & 4A Settings 10-Bit range 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC512B 4A SMART BATTERY CHARGER QUICK START PROCEDURE Demonstration circuit 512B is easy to set up to evaluate the performance of the LTC4100. Refer to Figure 1 for proper measurement equipment setup and follow the procedure below. 1. Set the jumpers according to the voltage and current specifications of the pack under evaluation. 2. With all power off, connect input power supply, and meters as shown in Figure 1. 3. Preset the system load to 0A and the input supply to 0V, 0A current limit. 4. Turn on the supply, setting the current limit to 3.5A. 5. Adjust the input voltage to the desired value, up to 25V. 6. Connect the battery to begin charging. Plug in the battery. An industry standard 5-pin Smart Battery connector is provided as well as generic soldering test points for hardwire connections. Optional 1. For different ILIM & VLIM settings, adjust JP1 & JP3 as necessary. 2. To disable charging through hardware, connect CHGEN to GND. 3. To probe the SMBus communication or connect to an external host, connect leads to SDA, SCL, and GND. 4. To use an external logic supply, disable the onboard 5V linear regulator by setting JP2 to OFF. Note: Not supplying an alternative VLOGIC will disable the LEDs as well as SMBus communications, which prevents charging. It is always recommended to supply a VLOGIC at all times. 5. Use DC1223A-B USB-to-SMBus demoboard to control and configure the provided DC512B evaluation software. Please refer to the LTC4100 datasheet for additional information. 2 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC512B 4A SMART BATTERY CHARGER OPTIONAL DC1223A-B SMBUS TO USB ADAPTER PROVIDES DATA LOGGING AND BATTERY CONTROL - VOUT - LOAD + SMART BATTERY VIN - + V - V + + Figure 1. Proper Measurement Equipment Setup 3 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC512B 4A SMART BATTERY CHARGER PARTS LIST ITEM QTY REFERENCE Required Circuit Components 1 1 C2 2 4 C3, C4, C9, C10 3 1 C5 4 1 C6 5 1 C7 6 2 C8, C14 7 1 C16 8 1 D1 9 1 L1 10 1 Q1 11 1 Q2 12 7 Q3-Q9 13 1 Q11 14 1 R1 15 1 R2 16 2 R4, R5 17 1 R7 18 1 R8 19 1 R10 20 1 R12 21 1 R14 22 1 R16 23 1 R17 24 1 R20 25 1 U1 PART DESCRIPTION MANUFACTURE / PART # Capacitor, Y5V, 0.1F, 80%, 25V 0603 Capacitor, X5R, 10F, 20%, 25V 0603 Capacitor, X7R, 0.01F, 20%, 25V 0603 Capacitor, X7R, 0.1F, 10%, 10V 0603 Capacitor, X7R, 0.12F, 10%, 10V 0603 Capacitor, X7R, 0.1F, 10%, 16V 0805 Capacitor, X7R, 1500pF, 10%, 100V 0603 Diode Schottky, 1A, 40V POWERMITE Inductor, 10H, High Current, WE-HCL 1050 MOSFET, Dual P-Channel, SO-8 MOSFET, Single P-Channel, SO-8 MOSFET, N-Channel, 60V, 115mA, SOT23-3 MOSFET, Single N-Channel, SSOT-6 Resistor, 5.1K, 1/16W, 5% 0603 Resistor, 0.028, 1/2W, 1% 1206 Resistor, 15K, 1/16W, 5% 0603 Resistor, 0.025, 1/2W, 1% 1206 Resistor, 100, 1/16W, 5% 0603 Resistor, 1.13k, 1/16W, 1% 0603 Resistor, 6.04k, 1/16W, 1% 0603 Resistor, 54.9k, 1/16W, 1% 0603 Resistor, 100K, 1/16W, 1% 0603 Resistor, 13.7k, 1/16W, 1% 0603 Resistor, 1.21k, 1/16W, 1% 0603 I.C. Smart Battery Charger SSOP-24 AVX, 06033G104ZAT2A AVX, 18123D106MAT2A AVX, 06033C103KAT2A AVX, 0603ZC104MAT2A AVX, 0603ZC124MAT2A AVX, 0805YC104KAT2A AVX, 06031C152KAT2A Diodes Inc., MMSZ5248BS-7-F Wurth Electronik, 7443251000 Vishay, Si4925DDY-T1-GE3 Vishay, Si4431CDY-T1-GE3 Diodes Inc./Zetex, 2N7002TA Fairchild, FDC655BN Vishay, CRCW06035K10JNEA Vishay, WSL1206R0280FEA Vishay, CRCW04023K00JNED Vishay, WSL1206R0250FEA Vishay, CRCW0603100RJNEA Vishay, CRCW06031K13FKEA Vishay, CRCW06036K04FKEA Vishay, CRCW060354K9FKEA Vishay, CRCW0603100KFKEA Vishay, CRCW060313K7FKEA Vishay, CRCW06031K21FKEA Linear Technology LTC4100EG#PBF 4 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC512B 4A SMART BATTERY CHARGER PARTS LIST Additional Demo Board Circuit Components 1 1 C1 Capacitor, ELECT., 10F, 10% 35V 2 1 C11 Capacitor, Y5V, 1F, 80%, 25V 1206 3 1 C12 Capacitor, X7R, 0.1F, 20%, 16V 0603 4 1 C13 Capacitor, TANT, 10F, 20%, 16V 3828 5 1 C15 Capacitor, X7R, 0.068F, 10%, 16V 0603 6 1 D2 Diode, Zener, 18V SOD-323 7 1 D3 LED, Orange 8 3 D4, D5, D6 LED, Green 9 1 D7 LED, Red 10 1 D8 Diode, Dual Schottky, 75V, 350mW, SOT23-3 11 2 R9, R11 Resistor, 10, 1/16W, 5% 0603 12 1 R13 Resistor, 10k, 1/16W, 5% 0603 13 0 R15 OPT. 14 6 R18, R21-R25 Resistor, 300, 1/16W, 5%, 0603 15 1 R19, R26 Resistor, 33.2k, 1/16W, 1% 0603 16 1 U2 I.C. Linear Regulator SO-8 Hardware/Components (For Demo Board Only) 1 3 JP1-JP3 Header, 3 Pin, single row, 0.079"CC 2 1 J1 Connector., Power Jack 2.1mm 3 1 J2 Header, Right Angle 4 3 JP1-JP3 Shunt 5 9 TP1-TP10, TP12-TP14 Turret, Test Pin, .061" 6 4 MH1-MH4 Standoff, Snap-on Nylon Sun Electronics, 35CE10AX AVX, 12063G105ZAT2A AVX, 0603YC104KAT2A AVX, TAJB106M016RNJ AVX, 0603YC683KAT2A Diode Inc., MMSZ5248BS-7 Rohm, SML-010DTT86L Rohm, SML-010FTT86L Rohm, SML-010VTT86L Diodes Inc., BAV70-7-F Vishay, CRCW060310R0JNEA Vishay, CRCW060310K0FKEA Vishay, CRCW0603300RJNEA Vishay, CRCW060333K2FKEA Linear Technology LT1129CS8-5#PBF Sullins, NRPN031PAEN CUI Inc., PJ-002A TE Connectivity, 5787441-1 Samtec, 2SN-BK-G Mill-Max, 2308-2-00-80-00-00-07-0 KEYSTONE, 8831 5 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC512B 4A SMART BATTERY CHARGER 6