19-3565; Rev 3; 12/08 KIT ATION EVALU E L B A IL AVA Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer The MAX8600/MAX8601 single-/dual-input linear battery chargers safely charge single-cell Li+ batteries. The charging rate is optimized to accommodate the thermal characteristics of a given application. There is no need to reduce the maximum charge current or worst-case charger power dissipation. Charging is optimized for Li+ cells using a control algorithm that includes low-battery precharging, voltage and currentlimited fast-charging, and top-off charging, while continuously monitoring the battery for overvoltage, over/undertemperature, and charging time. The charger timeout protection is programmable. The charger status is indicated by three open-drain outputs. The MAX8601 automatically selects between either a USB or AC adapter input source. The AC adapter charge current is programmable, while USB charge current is set not to exceed either 100mA or 500mA, depending on the USEL input. The MAX8600 is a single-input charger with no USB source input. The MAX8600/MAX8601 are available in a 3mm x 3mm power-enhanced TDFN package. Features Single- (MAX8600) or Dual- (MAX8601) Input Li+ Charger Up to 1A Programmable Fast-Charge 100mA/500mA USB Select Input (MAX8601) 5% Fast-Charge Current-Limit Accuracy 14V Input Overvoltage Protection Programmable On-Chip Charge Timers Battery Thermistor Input Charger-Status Outputs Thermally Optimized Charge Rate 14-Pin, 3mm x 3mm TDFN Package Ordering Information PART TEMP RANGE PIN-PACKAGE MAX8600ETD+ -40C to +85C 14 TDFN-EP* 3mm x 3mm (T1433-2) ABB -40C to +85C 14 TDFN-EP* 3mm x 3mm (T1433-2) AAC Applications Cell Phones Portable Media Players MAX8601ETD+ Digital Cameras MP3 Players PDAs Wireless Appliances *EP = Exposed pad. +Denotes a lead(Pb)-free/RoHS-compliant package. TOP MARK Typical Operating Circuit Pin Configurations VLOGIC TOP VIEW + BAT 1 14 FLT SETI 2 13 DC THM 3 12 DC GND 4 11 CHG CT 5 10 POK N.C. 6 9 N.C. N.C. 7 8 EN MAX8600 AC ADAPTER FLT DC CHARGE STATUS POK USB PORT GND CHG USB BAT MAX8601 Li+ 500mA USEL 100mA OFF ON EN SETI THM CT TDFN Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX8600/MAX8601 General Description MAX8600/MAX8601 Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer ABSOLUTE MAXIMUM RATINGS DC, USB to GND ....................................................-0.3V to +16V BAT, CT, CHG, EN, FLT, SETI, POK, THM, USEL to GND..................................-0.3V to +6.0V Continuous Power Dissipation (TA = +70C) 14-Pin TDFN 3mm x 3mm Multilayer PCB (derate 24.4mW/C above +70C) ........................ 1951.2mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VDC = VUSB = 5V, VBAT = 4V, V EN = 0V, RSETI = 2k, CCT = 0.068F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C. Note 1) PARAMETER CONDITIONS MIN TYP MAX UNITS DC OR USB (Note 2) Input Voltage Range 0 14 V Input Operating Range (Note 3) 4.15 7.00 V Input Undervoltage Threshold Input rising, 500mV hysteresis (typ) 3.85 4.0 4.15 V Input Overvoltage Threshold Input rising, 200mV hysteresis (typ) 7.2 7.5 7.8 V Input Overvoltage Delay From overvoltage event to charger disabled 0.25 Input Supply Current IBAT = 0mA, RTHM = 10k 750 1200 A Shutdown Input Current VEN = 5V, TA = +25C 275 435 A Input to BAT On-Resistance Input = 3.7V, VBAT = 3.6V Input to BAT Dropout Voltage Input falling, 200mV hysteresis (typ) s 0.5 0.8 5 55 120 mV TA = +25C 4.179 4.2 4.221 TA = -40C to +85C 4.166 4.2 4.234 -180 -150 -120 RSETI = 1.5k 950 1000 1050 RSETI = 2k 727 750 773 RSETI = 5k 280 300 320 BAT BAT Regulation Voltage IBAT = 0mA BAT Restart Fast-Charge Threshold From BAT regulation voltage DC Charging Current USB Charging Current VUSB = 0V VDC = 0V Prequal, RSETI = 2k, VBAT = 2.5V 60 75 90 VUSEL = 5V 450 475 500 VUSEL = 0V 80 95 100 Prequal, RSETI = 2k, VBAT = 2.5V 60 75 90 Soft-Start Time Ramp time to fast-charge current BAT Prequal Threshold VBAT rising, 180mV hysteresis (typ) BAT Leakage Current VDC = VUSB = 0V, VBAT = 4.2V 1.2 2.9 V mV mA mA ms 3.0 3.1 V 0.001 5 A 5.0 k SETI RSETI Resistance Range 2 Guaranteed by charging current 1.5 _______________________________________________________________________________________ Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer (VDC = VUSB = 5V, VBAT = 4V, V EN = 0V, RSETI = 2k, CCT = 0.068F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C. Note 1) PARAMETER CONDITIONS MIN TYP MAX UNITS EN, USEL Logic Input Thresholds Logic Input Leakage Current Rising 1.6 Falling V EN = VUSEL = 0 to 5.5V 0.4 TA = +25C 0.001 TA = +85C 0.01 1 12 100 TA = +25C 0.001 1 TA = +85C 0.01 V A POK, CHG, FLT Logic Output Voltage, Low I POK, = I CHG = I FLT = 1mA Logic Output Leakage Current, High V POK = V CHG = V FLT = 5.5V, VDC = VUSB = 0V mV A CHG CHG/Top-Off Threshold IBAT falling, battery is charged RSETI = 1.5k RSETI = 2k 75 37.5 RSETI = 5k 56.25 75.0 mA 22.5 THM THM Pullup Resistance 10 k THM Resistance, Hot RTHM falling, 420 hysteresis (typ) 3.72 3.94 4.13 k THM Resistance, Cold RTHM rising, 2.7k hysteresis (typ) 26.7 28.3 29.7 k THM Resistance, Disabled RTHM falling, 230 hysteresis (typ) 274 309 337 Timer Accuracy CCT = 0.068F -20 Prequal Time Limit From entering prequal to FLT low, VBAT < 3V CT +20 % 34.8 min Charge Time Limit From entering fast-charge to FLT low, 3V < VBAT < 4.2V 334 min Top-Off Time Limit From CHG high to charger disabled 34.8 min Thermal-Limit Temperature Junction temperature when the charge current is reduced, TJ rising +100 C Thermal-Limit Gain Reduction of IBAT for increase of TJ, from VDC, RSETI = 1.5k 5 %/C THERMAL LOOP Note 1: Limits are 100% production tested at TA = +25C. Limits over the operating temperature range are guaranteed by design and characterization. Note 2: Input refers to either DC or USB. Note 3: Guaranteed by undervoltage- and overvoltage-threshold testing. For complete charging, the input voltage must be greater than 4.32V. _______________________________________________________________________________________ 3 MAX8600/MAX8601 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VDC = 5V, RSETI = 2k, VBAT = 3.6V, MAX8601 evaluation kit with thermal resistance of 50C/W. TA = +25C, unless otherwise noted.) DISABLED SUPPLY CURRENT vs. INPUT VOLTAGE MAX8600/01 toc02 800 700 600 500 400 300 1000 RSETI = 1.5k CHARGE CURRENT (mA) 800 900 SUPPLY CURRENT (A) 900 700 600 500 400 300 200 200 100 800 600 4 6 8 10 12 0 2 4 6 8 10 12 14 0 INPUT VOLTAGE (V) VBAT (V) CHARGE CURRENT vs. DC VOLTAGE CHARGE CURRENT vs. USB VOLTAGE CHARGE CURRENT vs. INPUT VOLTAGE HEADROOM 400 DASHED DATA TAKEN WITH PULSE TESTING TO AVOID THERMAL LIMIT 200 600 1000 900 800 VUSEL = 5V 500 400 300 VUSEL = 0V 200 700 600 500 400 300 200 100 100 0 0 4 6 8 10 12 0 0 14 2 4 6 8 10 12 14 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 VUSB (V) VDC (V) (VIN - VBAT) (V) CHARGE CURRENT vs. AMBIENT TEMPERATURE (750mA CHARGE) BATTERY REGULATION VOLTAGE vs. AMBIENT TEMPERATURE 4.205 4.200 4.195 4.190 1000 900 VBAT = 4V 800 CHARGE CURRENT (mA) MAX8600/01 toc07 4.210 BATTERY REGULATION VOLTAGE (V) MAX8600/01 toc06 700 RSETI = 3k 600 DASHED DATA TAKEN WITH PULSE TESTING TO AVOID THERMAL LIMIT MAX8600/01 toc08 RSETI = 2k 800 800 CHARGE CURRENT (mA) RSETI = 1.5k 2 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 INPUT VOLTAGE (V) 1000 0 DASHED DATA TAKEN WITH PULSE TESTING TO AVOID THERMAL LIMIT VEN = 5V 0 14 CHARGE CURRENT (mA) 2 MAX8600/01 toc04 0 RSETI = 3k 400 0 0 RSETI = 2k 200 100 VEN = 0V MAX8600/01 toc05 SUPPLY CURRENT (A) 1000 MAX8600/01 toc01 1000 CHARGE CURRENT vs. BATTERY VOLTAGE 700 600 VBAT = 3.6V 500 400 300 200 4.185 100 0 4.180 -40 -15 10 35 TA (C) 4 MAX8600/01 toc03 SUPPLY CURRENT vs. INPUT VOLTAGE CHARGE CURRENT (mA) MAX8600/MAX8601 Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer 60 85 -40 -15 10 35 60 85 TA (C) _______________________________________________________________________________________ Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer CHARGE CURRENT vs. AMBIENT TEMPERATURE (1A CHARGE) 800 VBAT = 3.6V 700 600 500 400 MAX8600/01 toc10 CHARGE CURRENT (mA) 900 800 700 FAST-CHARGE TIME (MIN) VBAT = 4V 1000 FAST-CHARGE TIME vs. CCT MAX8600/01 toc09 1100 600 500 400 300 200 300 200 100 RSETI = 1.5k 100 -40 -15 10 35 60 85 0 0.010 0.045 0.080 0.115 0.150 CCT (F) TA (C) Pin Description PIN NAME FUNCTION MAX8600 MAX8601 1 1, 7 BAT Battery Connection. The IC delivers charging current and monitors battery voltage using BAT. Bypass BAT to GND with a 2.2F or larger ceramic capacitor. Connect both BAT inputs together externally (MAX8601). BAT is high impedance when the IC is disabled. 2 2 SETI DC Charge-Current Programming Input. Connect a resistor from SETI to GND to set the maximum charging current when using the DC input, the prequal current from either input, and the CHG turn-off threshold. 3 3 THM Thermistor Input. Connect a 10k NTC thermistor, in close proximity to the battery, from THM to ground to monitor the battery temperature. Connect THM to GND to disable the thermistor functionality. The IC suspends charging when RTHM is outside the hot and cold limits. 4 4 GND Ground 5 5 CT 6, 7, 9 -- N.C. 8 8 EN 10 10 POK Power-OK Monitor. POK is an open-drain output that pulls low when a valid charging source is detected at either DC or USB (MAX8601). POK is high impedance when EN is high. 11 11 CHG Charging-Status Output. CHG goes low when the battery is above 3V and being charged with a current greater than 7.5% of the current programmed with RSETI. CHG is high impedance when the charger is in prequal, top-off, or disabled. Timing Capacitor Input. Connect a capacitor from CT to GND to set the precharge timeout, top-off time, and fast-charge timeout. Connect CT to GND to disable the timers. No Connection. Make no external circuit connection. Active-Low Enable Input. Drive low or connect EN to GND to enable the charger. Drive EN high to disable the charger. _______________________________________________________________________________________ 5 MAX8600/MAX8601 Typical Operating Characteristics (continued) (VDC = 5V, RSETI = 2k, VBAT = 3.6V, MAX8601 evaluation kit with thermal resistance of 50C/W. TA = +25C, unless otherwise noted.) MAX8600/MAX8601 Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer Pin Description (continued) PIN NAME FUNCTION 12, 13 DC DC Input Supply. Connect DC to a 4.5V to 7V charging source. Bypass DC to GND with a 1F or larger capacitor. DC takes priority over USB when both are present (MAX8601). Both DC inputs should be connected together externally. 14 14 FLT Fault Status Output. FLT goes low when either the prequal timer or the fast-charge timers expire and the battery voltage is not above the required threshold. Clear the fault by raising EN or removing input power. -- 9 USB USB Input Source. Connect to a USB port. Bypass USB to GND with a 1F or larger capacitor. -- 6 USEL USB Charge-Select Input. Logic input that determines the maximum charge current drawn from the USB input. IBAT = 95mA when USEL = low, and IBAT = 475mA when USEL = high. -- -- EP MAX8600 MAX8601 12, 13 Exposed Pad. Connect to the GND plane for optimum thermal dissipation. OFF POK = HIGH, CHG = HIGH, FLT = HIGH IBAT = 0A VIN < 4.1V OR VIN < 7.5V OR VIN < VBAT OR EN HIGH ANY STATE EN LOW AND POWER-GOOD SET TIMER = 0s THM OUT OF RANGE POK = PREVIOUS STATE CHG = PREVIOUS STATE IBAT = 0A PREQUAL TIMER HELD RTHM > 3.97k AND RTHM < 28.7k PREQUAL POK = LOW, CHG = HIGH IBAT = 150 / RSETI FAULT CHG = HIGH FLT = LOW RTHM < 3.97k OR RTHM > 28.7k VBAT < 2.82V SET TIMER = 0s THM OUT OF RANGE POK = PREVIOUS STATE CHG = PREVIOUS STATE IBAT = 0A FAST-CHARGE TIMER HELD VBAT < 3V AND PREQUAL TIMEOUT RTHM > 3.97k AND RTHM < 28.7k VBAT > 3V SET TIMER = 0s FAST-CHARGE POK = LOW, CHG = LOW IBAT(DC) = 1500 / RISET IBAT(USB) = 100mA / 500mA RTHM < 3.97k OR RTHM > 28.7k IBAT < 172.5/RSETI AND VOLTAGE MODE SET TIMER = 0s IBAT > 112.5 / RSETI AND FAST-CHARGE TIMEOUT IBAT < 112.5 / RSETI AND VOLTAGE MODE SET TIMER = 0s TOP-OFF POK = LOW, CHG = HIGH VBAT < 4.05V SET TIMER = 0s TOP-OFF TIMEOUT DONE POK = LOW, CHG = HIGH IBAT = 0A Figure 1. Charger State Diagram 6 _______________________________________________________________________________________ Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer DC Charging The MAX8600/MAX8601 are designed to charge a single-cell Li+ battery from a DC source voltage between 4.15V and 7V. The precharge current, charge current, and top-off threshold are programmable with RSETI. USB Charging (MAX8601) The MAX8601 contains a USB input that allows operation from either a DC source or a USB port. A USEL input allows the user to select either a 100mA or 500mA maximum charging current when using the USB input. If both VUSB and VDC are valid, the MAX8601 operates from DC. If VDC is invalid (undervoltage/overvoltage), the MAX8601 operates from USB. When charging at 100mA from the USB input, the fast-charge timer is inhibited. EN Charger-Enable Input EN is a logic input (active low) that enables the charger. Drive EN high to disable the charger-control circuitry. Drive EN low or connect to GND for normal operation. Soft-Start To prevent input transients, the rate of change of charging current is limited. When the charger is turned on or when the input source is changed, charge current is ramped from 0 to the set current value in typically 1.2ms. This also means that if charging is taking place from USB, and the DC input is then powered, charge current falls to zero and then is reramped to the DC charge rate. This is done to ensure that the DC source is not subjected to a severe load current step. Charge-current ramp up is also limited when transitioning from prequal to fast-charge, and when changing the USB charge current from 100mA to 500mA with USEL. There is no di/dt limiting, however, if ISET is changed suddenly using a switch at RSETI. Fault Indicator (FLT) The MAX8600/MAX8601 contain an open-drain FLT output to signal the user when a fault occurs. FLT goes low if the charger is in prequal and the prequal timer expires, or if the charger is in fast-charge and the fastcharge time expires. FLT does NOT go low if the THM thermistor temperature is out of range. Toggle EN or the input power to reset the FLT indicator. Power-OK Indicator (POK) The MAX8600/MAX8601 contain an open-drain POK output that goes low when a valid input source is detected at DC or USB (MAX8601 only). A valid input source is one whose voltage is between 4.15V and 7V and exceeds the battery voltage by 320mV. After a valid input has been established, charging is sustained with inputs as low as 3.5V as long as the input voltage remains above the battery voltage by at least 55mV (typ). POK is high impedance when the charger is disabled. Applications Information Figure 2 shows the typical operating circuit for the MAX8601. The following section describes component changes for different charging current and timer durations. TO LOGIC SUPPLY (3.3V) 100k AC ADAPTER 4.5V TO 7V (OVP TO 16V) FLT FAULT POK POWER-OK GND CHG BAT USB PORT 4.5V TO 5.5V USB 2.2F MAX8601 THM 500mA 100mA OFF ON CHG Charge-Indicator Output CHG is an open-drain output that indicates charger status. CHG goes low during charge cycles where VBAT is greater than 3V and IBAT is greater than 7.5% of the maximum charge current set by R SETI . When the MAX8600/MAX8601 are used in conjunction with a microprocessor (P), connect a pullup resistor between CHG and the logic I/O voltage to indicate charge status to the P. Alternatively, CHG can sink up to 20mA for an LED charge indicator. 330 DC 1F Thermal-Limit Control The MAX8600/MAX8601 feature a thermal limit that reduces the charge current when the die temperature exceeds +100C. As the temperature increases above +100C, the IC lowers the charge current by 5%/C. 100k NTC 10k AT +25C USEL EN SETI CT CCT 0.068F RSETI 2k Figure 2. Typical Operating Circuit for USB/AC-Adapter Input Charger. An RSETI of 2k sets an AC adapter fast-charge of 750mA. _______________________________________________________________________________________ 7 MAX8600/MAX8601 Detailed Description MAX8600/MAX8601 Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer Table 1. Fault Temperatures for Different Thermistors THERMISTOR BETA Resistance at +25C Resistance at +50C 3000 3250 3500 3750 10,000 10,000 10,000 10,000 4587.78 4299.35 4029.06 3775.75 25,140.55 27,148.09 29,315.94 31,656.90 Nominal Hot Trip Temperature +55.14C +52.60C +50.46C +48.63C Nominal Cold Trip Temperature -3.24C -1.26C +0.46C +1.97C Resistance at 0C Charge Current Selection The maximum charging current from a supply connected to DC is programmed by an external resistor (RSETI) connected from SETI to GND. Calculate the RSETI value as follows: RSETI = 1500 / ICHARGE(MAX) where ICHARGE(MAX) is in amps and RSETI is in ohms. SETI can also be used to monitor the actual chargecurrent level. The output voltage at SETI is proportional to the charging current as follows: VSETI = (ICHARGE x RSETI) / 1000 Note that the prequal current for both USB and DC input operation is 1/10 of the fast-charge current set by RSETI. Also, the top-off charge-current threshold for both USB and DC input operation is set to 7.5% of the fast-charge current set by RSETI. IPREQUAL = 150 / RSETI ITOP-OFF = 112.5 / RSETI Timer Capacitor Selection The MAX8600/MAX8601 contain timers for prequal, fast-charge, and top-off operation. These time periods are determined by the capacitance from CT to GND. To set the charge times, calculate CCT as follows: TFASTCHARGE = 334min x (CCT / 0.068F) TPREQUAL = TTOPOFF = 34.8min x (CCT / 0.068F) Note that when charging at 100mA from the USB input (MAX8601), the fast-charge timer is inhibited. When THM halts charging, the timers stop and hold their value. Battery Temperature Control The MAX8600/MAX8601 monitor battery temperature through a negative TC thermistor which is in close thermal contact with the battery. Select a thermistor resistance that is 10k at +25C and has a beta of 3500. The IC compares the resistance from THM to GND and suspends charging when it is greater than 28.3k or 8 less than 3.94k, which translates to a temperature of 0C to +50C. Table 1 shows the nominal temperature limits that result from a wide range of available thermistor temperature curves. The curves are defined by the following equation: 1 1 - 298 RT = R25C x e T + 273 where is the BETA term in Table 1. Connect THM to GND to disable the temperature-control function. When RTHM disables charging, all timers pause and hold their value. Capacitor Selection Connect a 2.2F ceramic capacitor from BAT to GND for proper stability. Connect a 1F ceramic capacitor from DC to GND. If using the USB input for the MAX8601, bypass USB to GND with a 1F ceramic capacitor. Use a larger input bypass capacitor for high charging currents to reduce supply noise. All capacitors should be X5R dielectric or better. Be aware that some capacitors have large voltage coefficients and should be avoided. Thermal Considerations The MAX8600/MAX8601 are in a thermally enhanced TDFN package with an exposed paddle. Connect the exposed paddle of the package to a large copper ground plane to provide a thermal contact between the device and the circuit board. The exposed paddle transfers heat away from the device, allowing the IC to charge the battery with maximum current, while minimizing the increase in die temperature. Note that the MAX8600/MAX8601s' thermal-limit control allows the charger to be tolerant of thermally restricted PC board layouts that are sometimes unavoidable in compact portable designs. With such non-optimal layouts, the charger still operates, but may reduce charge current to manage temperature rise. _______________________________________________________________________________________ Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer D1 GREEN LED R5 1k R3, R4 100k FLT DC AC ADAPTER C1 1F CHARGE STATUS POK GND The MAX8600/MAX8601 operating input voltage range is 4.15V to 7V. The device survives input voltages up to 16V without damage to the IC. If the input voltage is greater than 7.5V (typ), the IC stops charging. An appropriate power supply must provide at least 4.2V plus the voltage drop across the internal pass transistor when sourcing the desired maximum charging current. CHG VIN(MIN) > 4.2V + ICHARGE(MAX) x RON MAX8600 BAT where RON is the input-to-BAT resistance (typically 0.5). Failure to meet this requirement results in an incomplete charge or increased charge time. C3 2.2F R2 10k OFF ON EN Li+ SETI CT R1 2k Stand-Alone Li+ Charger The MAX8600 provides a complete Li+ charging solution. Figure 3 shows the MAX8600 as a stand-alone Li+ battery charger. The 2k resistor connected to SETI sets a charging current of 750mA. The LED indicates when fast-charge has begun. When fast-charge is complete, the LED turns off. THM C4 0.068F USB-Powered Li+ Charger (MAX8601) Figure 3. Stand-Alone Li+ Battery-Charger with the MAX8600 The universal serial bus (USB) provides a high-speed serial communication port as well as power for the VI/O R5 100k R3, R4 100k VBUS USB FLT GND CHG C1 1F GND POK DC MAX8601 BAT C2 2.2F USEL 500mA USB PORT EN SETI R1 2k R2 10k Li+ SYSTEM THM CT C3 0.068F D+ D- Figure 4. USB Battery Charger with the MAX8601 _______________________________________________________________________________________ 9 MAX8600/MAX8601 DC Input Sources +5V MAX8600/MAX8601 Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer remote device. The MAX8601 can be configured to charge its battery at the highest current possible from the host port. Figure 4 shows the MAX8601 configured as a USB battery charger. A USEL input sets the maximum charging current from the USB input at 100mA or 500mA. Layout and Bypassing Connect the input capacitors as close to the device as possible. Provide a large copper GND plane to allow the exposed paddle to sink heat away from the device. Connect the battery to BAT as close to the IC as possible to provide accurate battery voltage sensing. Make all high-current traces short and wide to minimize voltage drops. For an example layout, refer to the MAX8601 evaluation kit. Chip Information Pin Configurations (continued) TOP VIEW + BAT 1 14 FLT SETI 2 13 DC THM 3 12 DC GND 4 11 CHG CT 5 10 POK USEL 6 9 USB BAT 7 8 EN MAX8601 TRANSISTOR COUNT: 6838 PROCESS: BiCMOS 14 TDFN 10 ______________________________________________________________________________________ Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE CODE DOCUMENT NO. 14 TDFN-EP T1433-2 21-0137 6, 8, &10L, DFN THIN.EPS PACKAGE TYPE ______________________________________________________________________________________ 11 MAX8600/MAX8601 Package Information MAX8600/MAX8601 Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer Package Information (continued) For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. 12 COMMON DIMENSIONS PACKAGE VARIATIONS SYMBOL MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e A 0.70 0.80 T633-2 6 1.500.10 2.300.10 0.95 BSC MO229 / WEEA 0.400.05 1.90 REF D 2.90 3.10 T833-2 8 1.500.10 2.300.10 0.65 BSC MO229 / WEEC 0.300.05 1.95 REF E 2.90 3.10 T833-3 8 1.500.10 2.300.10 0.65 BSC MO229 / WEEC 0.300.05 1.95 REF A1 0.00 0.05 T1033-1 10 1.500.10 2.300.10 0.50 BSC MO229 / WEED-3 0.250.05 2.00 REF L 0.20 0.40 T1033-2 10 1.500.10 2.300.10 0.50 BSC MO229 / WEED-3 0.250.05 2.00 REF k 0.25 MIN. T1433-1 14 1.700.10 2.300.10 0.40 BSC ---- 0.200.05 2.40 REF A2 0.20 REF. T1433-2 14 1.700.10 2.300.10 0.40 BSC ---- 0.200.05 2.40 REF ______________________________________________________________________________________ Single-/Dual-Input 1-Cell Li+ Chargers with OVP Protection and Programmable Charge Timer REVISION NUMBER REVISION DATE 2 7/08 Corrected Absolute Maximum Rating 3 12/08 Corrected Absolute Maximum Ratings and made various updates DESCRIPTION PAGES CHANGED 2 1, 2, 3, 6, 7 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 (c) 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. 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