MAX1501 Highly Integrated, Linear Battery Charger with Thermal Regulation for Portable Applications General Description Features The MAX1501 intelligent, constant-current, constant- Stand-Alone 1-Cell Li+ Charging, Microprocessor- voltage (CCCV), temperature-regulated battery charger Controlled 3-Cell NiMH/NiCd Charging charges a single lithium-ion (Li+) cell or three-cell No FET, Reverse-Blocking Diode, or Current- NiMH/NiCd batteries. The device integrates the current- Sense Resistor Required sense resistor, PMOS pass element, and thermal- 1.4A (max) Programmable Fast-Charge Current regulation circuitry, while eliminating the reverse- blocking Schottky diode to create the simplest charging +95C, +115C, and +135C Proprietary solution for hand-held equipment. Programmable Die Temperature Regulation Control For single-cell Li+ batteries, the MAX1501 functions as a stand-alone charger to control the charging sequence 4.5V to 13V Input Voltage Range with Input from the prequalification state through fast charge, top- Overvoltage (OVLO) Protection Above 6.5V off, and charge termination. With 3-cell NiMH/NiCd Programmable Top-Off Current Threshold: 10%, batteries, the MAX1501 requires collaboration with a 20%, or 30% of the Fast-Charge Current microcontroller to determine the best charging algorithm. Charge-Current Monitor for Fuel Gauging Proprietary thermal-regulation circuitry limits the die tem- perature when fast charging or while exposed to high Programmable Safety Timer (3, 4.5, or 6 hours) ambient temperatures, allowing maximum charging cur- Input Power Detection Output (ACOK) and Charge rent without damaging the charger. The MAX1501 con- Enable Input (CHGEN) tinually supplies a regulated output voltage under Automatic Recharge no-battery conditions, allowing battery changing without interrupting system power. Digital Soft-Start Limits Inrush Current The device achieves high flexibility by providing an Charge Status Outputs for LEDs or P Interface adjustable fast-charge current, top-off current, safety timer (disabled in the MAX1501Z), and thermal-regula- Ordering Information tion setpoint. Other features include input power detec- tion (ACOK) and input under-/overvoltage protection. PART TEMP RANGE PIN-PACKAGE The MAX1501 provides active-low control inputs. MAX1501ETE -40C to +85C 16 Thin QFN The MAX1501 accepts a 4.5V to 13V supply, but MAX1501ZETE -40C to +85C 16 Thin QFN disables charging when the input voltage exceeds 6.5V, preventing excessive power dissipation. The MAX1501 operates over the extended temperature Typical Operating Circuit range (-40C to +85C) and is available in a compact 16-pin thermally enhanced 5mm x 5mm thin QFN INPUT package with 0.8mm profile. 4.5V TO 13V 4.2V 1-CELL Li+ IN BATT 1F 10F INP Applications MAX1501/MAX1501Z Cellular and Cordless Phones FULLI PDAs GLED VL Digital Cameras and MP3 Players RLED SELV USB Appliances V LOGIC TEMP MODE ( 5.5V) Charging Cradles and Docks TMAX/I.C. CHGEN Bluetooth Equipment R SETI PULLUP ACOK 2.8k Pin Configuration appears at end of data sheet. GND Bluetooth is a trademark of Ericsson. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-2800 Rev 2 4/14MAX1501 Highly Integrated, Linear Battery Charger with Thermal Regulation for Portable Applications ABSOLUTE MAXIMUM RATINGS IN, INP, RLED, GLED to GND ................................-0.3V to +14V Continuous Power Dissipation (T = +70C) A 16-Pin 5mm 5mm Thin QFN IN to INP ................................................................-0.3V to +0.3V VL, BATT, SETI, ACOK, MODE, CHGEN, SELV, (derate 21.3mW/C above +70C).............................1702mW Operating Temperature Range ...........................-40C to +85C FULLI, TMAX/I.C., TEMP to GND .........................-0.3V to +6V Junction Temperature......................................................+150C VL to IN...................................................................-14V to +0.3V 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 (V = V = 5V, V = 3.5V, ACOK = GLED = RLED = TEMP = TMAX/I.C. = FULLI = open, CHGEN = MODE = GND, R = 2.8k, IN INP BATT SETI C = 1F, C = 10F, T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) IN BATT A A PARAMETER CONDITIONS MIN TYP MAX UNITS IN, INP Input Voltage 013V IN, INP Input Operating Range 4.50 6.25 V VL Output Voltage 4.5V V 6.25V, I < 250A 2.7 3 3.3 V IN VL V - V , rising 40 70 100 IN BATT ACOK Trip Point V - V , falling 30 55 85 mV IN BATT V - V , hysteresis 15 IN BATT ACOK Sink Current 4.5V V 6.25V, V = 0.6V 75 A IN ACOK V rising 4.05 4.125 4.20 IN V Undervoltage Lockout Trip Point V falling 3.9 4.025 4.1 IN Hysteresis 100 mV Overvoltage Lockout Trip Point V rising 6.25 6.50 6.75 V IN Li+, NiMH/NiCd, and no-battery modes 5 8 IN Input Current Disable mode 1.5 3 mA Off mode (V = 4V) 0.25 IN V = 4.3V 45 80 BATT BATT Input Current V = 0 3 10 A IN Disable mode 2 6 Leakage into Battery V = V = 13V, V = 0 Disable mode 5 A IN INP BATT RMS Charge Current 1.4 A SELV = VL 4.166 4.2 4.234 Li+ mode SELV = GND 4.067 4.1 4.133 Battery Regulation Voltage V SELV = VL, 4.85 4.95 5.05 V = V = 6V NiMH/NiCd mode IN INP SELV = GND 4.4 4.5 4.6 Output Regulation Voltage No-battery mode 3.700 4.0 4.234 V BATT Precharge Threshold BATT rising 2.675 2.8 2.925 V Voltage R = 2.8k 460 500 540 Fast-Charge Current-Loop SETI mA System Accuracy R = 1.75 k 736 800 864 SETI 2 Maxim Integrated