ISL6251EVAL2Z Evaluation Board Setup Procedure ® Application Note Low Cost Multi-Chemistry Battery Charger Controller • ±0.5% Charge Voltage Accuracy (-10°C to +100°C) The constant output voltage can be selected for 2, 3 and 4 series Li-Ion cells with 0.5% accuracy over-temperature. It can be also programmed between 4.2V + 5%/cell and 4.2V - 5%/cell to optimize battery capacity. When supplying the load and battery charger simultaneously, the input current limit for the AC adapter is programmable to within 3% accuracy to avoid overloading the AC adapter, and to allow the system to make efficient use of available adapter power for charging. It also has a wide range of programmable charging current. The ISL6251, ISL6251A provides outputs that are used to monitor the current drawn from the AC adapter, and monitor for the presence of an AC adapter. The ISL6251, ISL6251A automatically transitions from regulating current mode to regulating voltage mode. • ±3% Accurate Input Current Limit • ±3% Accurate Battery Charge Current Limit • ±25% Accurate Battery Trickle Charge Current Limit (ISL6251A) • Programmable Charge Current Limit, Adapter Current Limit and Charge Voltage • Fixed 300kHz PWM Synchronous Buck Controller with Diode Emulation at Light Load • Output for Current Drawn from AC Adapter • AC Adapter Present Indicator • Fast Input Current Limit Response • Input Voltage Range 7V to 25V • Support 2, 3 and 4 Cells Battery Pack • Up to 17.64V Battery-Voltage Set Point • Thermal Shutdown • Support Pulse Charging • Less than 10µA Battery Leakage Current • Charge Any Battery Chemistry: Li-Ion, NiCd, NiMH, etc. Ordering Information PART MARKING AN1293.0 Features The ISL6251, ISL6251A is a highly integrated battery charger controller for Li-Ion/Li-Ion polymer batteries and NiMH batteries. High Efficiency is achieved by a synchronous buck topology and the use of a MOSFET, instead of a diode, for selecting power from the adapter or battery. The low side MOSFET emulates a diode at light loads to improve the light load efficiency and prevent system bus boosting. PART NUMBER (Notes 1, 2) April 10, 2007 TEMP RANGE (°C) • Pb-Free Plus Anneal Available (RoHS Compliant) PACKAGE (Pb-Free) PKG. DWG. # Applications ISL6251HRZ ISL 6251HRZ -10 to +100 28 Ld 5x5 QFN L28.5×5 • Notebook, Desknote and Sub-notebook Computers ISL6251HAZ ISL 6251HAZ -10 to +100 24 Ld QSOP • Personal Digital Assistant M24.15 ISL6251AHRZ ISL6251 AHRZ -10 to +100 28 Ld 5x5 QFN L28.5×5 ISL6251AHAZ ISL6251 AHAZ -10 to +100 24 Ld QSOP M24.15 NOTES: 1. Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 2. Add “-T” for Tape and Reel. 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1293 Pinouts NA ACSET VDD DCIN NA ACPRN CSON ISL6251, ISL6251A (28 LD QFN) TOP VIEW 28 27 26 25 24 23 22 CSIN ICOMP 3 19 CSIP VCOMP 4 18 NA ICM 5 17 NA VREF 6 16 PHASE CHLIM 7 15 UGATE 8 9 10 11 12 13 14 BOOT 20 VDDP 2 LGATE CELLS PGND CSOP GND 21 VADJ 1 ACLIM EN ISL6251, ISL6251A (24 LD QSOP) TOP VIEW 2 VDD 1 24 DCIN ACSET 2 23 ACPRN EN 3 22 CSON CELLS 4 21 CSOP ICOMP 5 20 CSIN VCOMP 6 19 CSIP ICM 7 18 PHASE VREF 8 17 UGATE CHLIM 9 16 BOOT ACLIM 10 15 VDDP VADJ 11 14 LGATE GND 12 13 PGND AN1293.0 April 10, 2007 Application Note 1293 What’s Inside This Evaluation Board Kit contains the following materials: • Qty(1) ISL6251EVAL2Z Evaluation Board • Qty(1) ISL6251EVAL2Z Setup Procedure What is Needed The following materials are recommended to perform testing: • One adjustable 25V 6A power supply Step 3: Select the Battery Charger Current Limit (Table 3) The CHLIM pin chooses the desired battery charger current limit threshold. Preset battery charger current limit thresholds are selected by placing a shunt jumper across the appropriate pins of JP4. For other battery charger current limit thresholds install a shunt jumper across pins 3 and 4 which connects the wiper of potentiometer R22 to CHLIM. Potentiometer R22 may be removed and replaced with resistors R6 and R7. TABLE 3. JUMPER JP4 FUNCTIONS • Two adjustable 6A constant current electronic loads 100% CURRENT CHLIM PIN SHUNT FEEDBACK JUMPER CONNECTED CSOP TO CSON TO: LOCATION • Two DVMs • One 500MHz four channel oscilloscope • Four passive oscilloscope voltage probes 100% CONSTANT CURRENT 1 to 3 VREF 120mV 4.80A Removed Floating 0V 0A • Two 10ADC Current Probes 3 to 5 GND 0V 0A • One Signal generator 3 to 4 R22 or R6/R7 0mV to 120mV 0A to 4.8A Jumper Selection Guide Step 4: Select the AC Adapter Current Limit (Table 4) Step 1: Select the Number of Cells (Table 1) The CELLS pin chooses the correct output voltage clamp for a given number of cells series-connected in the battery pack. Select the output voltage by placing a shunt jumper across the appropriate pins of JP1. TABLE 1. JUMPER JP1 FUNCTIONS CELLS PIN CONNECTED TO: NUMBER OF CELLS CONNECTED IN SERIES 100% CONSTANT OUTPUT VOLTAGE 1 to 2 VDD 4 16.8 2 to 3 GND 3 12.6 Removed Floating 2 8.4 SHUNT JUMPER LOCATION Step 2: Select the Cell Trim Voltage (Table 2) The VADJ pin trims the battery charger output voltage limit. Preset battery charger output voltage limits are selected by placing a shunt jumper across the appropriate pins of JP6. For other battery charger output voltage limits, install a shunt jumper across pins 3 and 4, which connects the wiper of potentiometer R24 to VADJ. Potentiometer R24 may be removed and replaced with resistors R19 and R21. Resistor R20 limits the trim increase to 1%. Shorting R20 allows the trim to increase 5%. Decreasing trim range is unaffected. TABLE 2. JUMPER JP6 FUNCTIONS SHUNT LOCATION VADJ PIN BATTERY VOLTAGE CHANGE PER CELL 1 to 3 Through R20 to VREF +5% 3 to 5 To GND -5% 5 to 6 Floating None 3 to 4 R24 Wiper or R19/R21 Adjustable between -5% to +5% 3 The ACLIM pin chooses the desired AC adapter current limit threshold. Preset AC adapter current limit thresholds are selected by placing a shunt jumper across the appropriate pins of JP5. For other AC adapter current limit thresholds, install a shunt jumper across pins 3 and 4, which connects the wiper of potentiometer R23 to ACLIM. Potentiometer R23 may be removed and replaced with resistors R17 and R18. TABLE 4. JUMPER JP5 FUNCTIONS 100% ADAPTER CURRENT ACLIM PIN CONNECTED TO: 100% CURRENT FEEDBACK CSIP TO CSIN 1 to 3 VREF 100mV 5.15A Removed Floating 75mV 3.90A SHUNT JUMPER LOCATION 3 to 5 GND 50mV 2.65A 3 to 4 R23 or R17/R18 50mV to 100mV 2.65A to 5.15A Interface Connections TABLE 5. HEADER PIN# H1 INPUT POWER 1 H2 SYSTEM LOAD OUTPUT H3 BATTERY CHARGER OUTPUT CONNECT TO “+” INPUT POWER 2 “+” SENSE (if used) 3 “-” SENSE (if used) 4 “-” INPUT POWER 1 “+” SYSTEM LOAD OUTPUT 2 “+” SENSE (if used) 3 “-” SENSE (if used) 4 “-” SYSTEM LOAD OUTPUT 1 “+” BATTERY CHARGER OUTPUT 2 “+” SENSE (if used) 3 “-” SENSE (if used) 4 “-” BATTERY CHARGER OUTPUT AN1293.0 April 10, 2007 ISL6251EVAL2Z Schematic 4 Application Note 1293 AN1293.0 April 10, 2007 Application Note 1293 TABLE 6. BILL OF MATERIALS QTY REF DES 1 C6 1 DESCRIPTION MFG NAME PART NUMBER Capacitor, SMD, 0603, 100pF, 50V, 5%, COG TDK C1608COG1H101J C7 Capacitor, SMD, 0805, 0.01µF, 50V, 5%, COG TDK C2012COG1H103J 1 C5 Capacitor, SMD, 0805, 6800pF, 50V, 5%, COG TDK C2012COG1H682J 3 C2, C4, C8 Capacitor, SMD, 0805, 1.0µF, 16V, 20%, X7R TDK C2012X7R1C105M 3 C3, C9, C10 Capacitor, SMD, 0805, 0.1µF, 50V, 10%, X7R TDK C2012X7R1H104K 2 C14, C15 Capacitor, SMD, 1812, 22µF, 25V, 20%, X5R TDK C4532X5R1E226M 1 D2 SURFACE MOUNT SCHOTTKY BARRIER DIODE Diodes Inc BAT54WT1 1 L1 Choke, SMD, 8mm, 15µH, 20%, 5.65A, Shielded Sumida CDRH127/LD-150NC 1 U1 IC, Battery Charger, 24 Ld QSOP, -10°C to +100°C Intersil ISL6251HAZ 1 Q2 MOSFET, N-CH, 8P, SOIC, 30V, 8.4A, 0.022Ω Fairchild FDS6612A 1 Q1 MOSFET, N-CH, 8P, SOIC, 30V, 10.8A, 0.011Ω IR IRF7811AV 1 Q5 MOSFET, P-CH, 3P, SOT23, -30V, -0.9A, 0.5Ω Fairchild NDS352AP 1 D1 DIODE SCHOTTKY 40V 10A POWERDI5 Diodes Inc. PDS1040-13 1 R2 Resistor, Shunt, SMD, 2010, 0.020Ω, 1W, 1% IRC LRC-LRF2010-01-R020-F 1 R1 Resistor, Shunt, SMD, 2010, 0.025Ω, 1W, 1% IRC LRC-LRF2010-01-R025-F 1 R13 Resistor, SMD, 0805, 18Ω, 0.125W, 5% KOA RK73B2AT180J 1 R12 Resistor, SMD, 0805, 2.2Ω, 0.125W, 5% KOA RK73B2AT2R2J 1 R15 Resistor, SMD, 0805, 4.7Ω, 0.125W, 5% KOA RK73B2AT4R7J 1 R14 Resistor, SMD, 0805, 10kΩ, 0.125W, 1% KOA RK73H2AT1002F 1 R11 Resistor, SMD, 0805, 7.87kΩ, 0.125W, 1% KOA RK73H2AT7871F 3 R3, R4, R8 Resistor, SMD, 0805, 100kΩ, 0.125W, 1% KOA RK73H2AT1003F 1 R20 Resistor, SMD, 0805, 33.2kΩ, 0.125W, 1% KOA RK73H2AT3322F 1 R16 Resistor, SMD, 0805, 0Ω, 2A, 50mΩ Max KOA RK73Z2AT 5 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 1. TOP SILK 6 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 2. TOP LAYER 7 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 3. LAYER 2 GROUND 8 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 4. LAYER 3 SIGNAL 9 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 5. LAYER 4 GROUND 10 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 6. LAYER 5 GROUND 11 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 7. BOTTOM COPPER 12 AN1293.0 April 10, 2007 Application Note 1293 FIGURE 8. BOTTOM SILK All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 13 AN1293.0 April 10, 2007