MAX1898EUB41

MAX1898EUB41 Datasheet

MAX1898

Part	Datasheet
MAX1898EUB41	MAX1898EUB41 (pdf)

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Linear Charger for Single-Cell Li+ Battery MAX1898 The MAX1898, with an external PNP or PMOS transistor, forms a complete charger for 1-cell lithium-ion Li+ batteries. The MAX1898 provides accurate constant-current/constant-voltage charging. Battery regulation voltage accuracy is for optimum battery performance and cycle life. Charging current is user set, but is sensed internally so no external current-sense resistor is needed. The MAX1898 also provides outputs to monitor charge status, presence-of-input power source, and charge current. Additional features include shutdown, optional charge-cycle restart without input-power cycling, selectable charge termination safety timer, and low-current preconditioning for deeply discharged cells. The MAX1898 offers the maximum integration and functionality in the smallest, most basic application circuit possible. Very few external components are required. The MAX1898 offers two versions to safely charge all Li+ battery chemistries. The battery regulation voltage is 4.2V for the MAX1898EUB42 and 4.1V for the MAX1898EUB41. Both are available in a 10-pin ultrathin µMAX package. Single-Cell Li+ Powered Portables Self-Charging Battery Packs PDAs Cell Phones Cradle Chargers TOP VIEW IN 1 CHG 2 EN/OK 3 ISET 4 Pin Configuration MAX1898 µMAX 10 CS 9 DRV 8 GND 7 BATT 6 RSTRT o Simple, Safe Linear Charger o Uses Low-Cost PNP or PMOS Pass Element o 4.5V to 12V Input Range o Internal Current-Sense Resistor o Voltage Accuracy o Programmable Charging Current o Automatic Input Power-Source Detection o LED Charge Status Indicator o Programmable Safety Timer o Current-Sense Monitor Output o Optional/Adjustable Auto-Restart o Small µMAX Package PART MAX1898EUB42 MAX1898EUB41 Ordering Information TEMP RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 10 µMAX 10 µMAX Typical Operating Circuit INPUT 4.5V TO 12V ON OFF CT SETS CHARGE TIME MAX1898 EN/OK BATT ISET RSTRT GND SETS CHARGE CURRENT OUTPUT Li+ BATTERY Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at MAX1898 Linear Charger for Single-Cell Li+ Battery ABSOLUTE MAXIMUM RATINGS IN, DRV, CS, CHG to GND to +14V BATT, EN, ISET, RSTRT, CT to GND ........................-0.3V to +6V DRV to +0.3V IN to CS Current DRV Continuous Current Continuous Power Dissipation TA = +70°C 10-Pin µMAX derate 5.6mW/°C above +70°C ..........444mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s 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 VIN = 8V, VBATT = 4V, EN/OK = open, RSET = RSTRT = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. PARAMETER Supply Voltage Range Input OK Trip Point, IN Rising VIN - VBATT Input OK Trip Point, IN Falling VIN - VBATT VIN Input OK Trip Point, IN Rising VIN Input OK Trip Point, IN Falling EN/OK Sink Current When Input Power Not OK EN/OK Source Current When Input Power OK EN/OK Logic Input High EN/OK Logic Input Low BATT Input Current IN, CS Input Current VOLTAGE LOOP Voltage-Loop Set Point Voltage-Loop Gain VBATT Prequal Voltage Threshold DRV Sink Current DRV Output Resistance CONDITIONS VIN = 3.9V, VBATT = 4V, VEN/OK = 0.8V VEN/OK = 2V 4.5V VIN 12V 4.5V VIN 12V Done, RSTRT = GND, VBATT = 4.1V for MAX1898EUB42 and 4.0V for MAX1898EUB41 Done, RSTRT = open, VBATT = 4.1V for MAX1898EUB42 and 4.0V for MAX1898EUB41 EN/OK = GND VIN = 4V VIN = VBATT = 4V IIN + ICS VIN = 12V, IIN + ICS , done, RSTRT = open MAX1898EUB42 MAX1898EUB41 Timers running MAX1898EUB42 MAX1898EUB41 VDRV = VIN - 1V, VBATT = 3.5V MIN TYP MAX UNITS Linear Charger for Single-Cell Li+ Battery MAX1898 ELECTRICAL CHARACTERISTICS continued VIN = 8V, VBATT = 4V, EN/OK = open, RSET = RSTRT = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. PARAMETER Maximum Voltage VIN - VDRV VBATT = 3.5V CONDITIONS MIN TYP MAX UNITS VBATT Restart Threshold As a Percentage of Voltage-Loop Set Point RSTRT = GND 92 98 RSTRT Internal Resistance CURRENT LOOP Internal Current-Sense Resistance RMS Charge Current IN to CS pin-to-pin resistance Current-Sense Amplifier Gain, ISET to IIN Fast Charge Current-Sense Amplifier Gain, ISET to IIN Prequal Current-Loop Regulation Set Point Current-Loop Gain CHG Trip Threshold As a Percentage of Full Load Current TIMER FUNCTION Timer Source/Sink Current Timer Accuracy CHG Output Low Current CHG Output High Leakage CHG Blink Rate ICS = 500mA, VSET = 1.4V ICS = 50mA, VISET = 0.14V, VBATT = 2V RSET = VBATT = 3.5V, closed-loop performance ILOAD falling, RSET = ILOAD rising, RSET =

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Linear Charger for Single-Cell Li+ Battery

MAX1898

The MAX1898, with an external PNP or PMOS transistor, forms a complete charger for 1-cell lithium-ion Li+ batteries. The MAX1898 provides accurate constant-current/constant-voltage charging. Battery regulation voltage accuracy is for optimum battery performance and cycle life. Charging current is user set, but is sensed internally so no external current-sense resistor is needed. The MAX1898 also provides outputs to monitor charge status, presence-of-input power source, and charge current. Additional features include shutdown, optional charge-cycle restart without input-power cycling, selectable charge termination safety timer, and low-current preconditioning for deeply discharged cells.

The MAX1898 offers the maximum integration and functionality in the smallest, most basic application circuit possible. Very few external components are required.

The MAX1898 offers two versions to safely charge all Li+ battery chemistries. The battery regulation voltage is 4.2V for the MAX1898EUB42 and 4.1V for the MAX1898EUB41. Both are available in a 10-pin ultrathin µMAX package.

Single-Cell Li+ Powered Portables Self-Charging Battery Packs PDAs Cell Phones Cradle Chargers

TOP VIEW

IN 1 CHG 2 EN/OK 3 ISET 4

Pin Configuration

MAX1898 µMAX
10 CS 9 DRV 8 GND 7 BATT 6 RSTRT
o Simple, Safe Linear Charger o Uses Low-Cost PNP or PMOS Pass Element o 4.5V to 12V Input Range o Internal Current-Sense Resistor o Voltage Accuracy o Programmable Charging Current o Automatic Input Power-Source Detection o LED Charge Status Indicator o Programmable Safety Timer o Current-Sense Monitor Output o Optional/Adjustable Auto-Restart o Small µMAX Package

PART MAX1898EUB42 MAX1898EUB41
Ordering Information

TEMP RANGE -40°C to +85°C -40°C to +85°C

PIN-PACKAGE 10 µMAX 10 µMAX

Typical Operating Circuit

INPUT 4.5V TO 12V

ON OFF

CT SETS CHARGE TIME

MAX1898

EN/OK

BATT

ISET

RSTRT GND

SETS CHARGE CURRENT

OUTPUT

Li+ BATTERY

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at

MAX1898

Linear Charger for Single-Cell Li+ Battery

ABSOLUTE MAXIMUM RATINGS

IN, DRV, CS, CHG to GND to +14V BATT, EN, ISET, RSTRT, CT to GND ........................-0.3V to +6V DRV to +0.3V IN to CS Current DRV Continuous Current

Continuous Power Dissipation TA = +70°C 10-Pin µMAX derate 5.6mW/°C above +70°C ..........444mW

Operating Temperature Range ...........................-40°C to +85°C Junction Temperature Storage Temperature Range .............................-65°C to +150°C Lead Temperature soldering, 10s

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

VIN = 8V, VBATT = 4V, EN/OK = open, RSET = RSTRT = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.

PARAMETER Supply Voltage Range Input OK Trip Point, IN Rising VIN - VBATT Input OK Trip Point, IN Falling VIN - VBATT VIN Input OK Trip Point, IN Rising VIN Input OK Trip Point, IN Falling EN/OK Sink Current When Input Power Not OK EN/OK Source Current When Input Power OK EN/OK Logic Input High EN/OK Logic Input Low

BATT Input Current

IN, CS Input Current VOLTAGE LOOP Voltage-Loop Set Point Voltage-Loop Gain VBATT Prequal Voltage Threshold DRV Sink Current DRV Output Resistance

CONDITIONS

VIN = 3.9V, VBATT = 4V, VEN/OK = 0.8V

VEN/OK = 2V
4.5V VIN 12V 4.5V VIN 12V Done, RSTRT = GND, VBATT = 4.1V for MAX1898EUB42 and 4.0V for MAX1898EUB41 Done, RSTRT = open, VBATT = 4.1V for MAX1898EUB42 and 4.0V for MAX1898EUB41 EN/OK = GND VIN = 4V VIN = VBATT = 4V IIN + ICS VIN = 12V, IIN + ICS , done, RSTRT = open

MAX1898EUB42

MAX1898EUB41

Timers running

MAX1898EUB42 MAX1898EUB41

VDRV = VIN - 1V, VBATT = 3.5V

MIN TYP MAX UNITS

Linear Charger for Single-Cell Li+ Battery

MAX1898

ELECTRICAL CHARACTERISTICS continued

VIN = 8V, VBATT = 4V, EN/OK = open, RSET = RSTRT = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.

PARAMETER Maximum Voltage VIN - VDRV

VBATT = 3.5V

CONDITIONS

MIN TYP MAX UNITS

VBATT Restart Threshold As a Percentage of Voltage-Loop Set Point

RSTRT = GND
92 98

RSTRT Internal Resistance CURRENT LOOP Internal Current-Sense Resistance RMS Charge Current

IN to CS pin-to-pin resistance

Current-Sense Amplifier Gain, ISET to IIN Fast Charge Current-Sense Amplifier Gain, ISET to IIN Prequal

Current-Loop Regulation Set Point

Current-Loop Gain CHG Trip Threshold As a Percentage of Full Load Current TIMER FUNCTION Timer Source/Sink Current Timer Accuracy CHG Output Low Current CHG Output High Leakage CHG Blink Rate

ICS = 500mA, VSET = 1.4V

ICS = 50mA, VISET = 0.14V, VBATT = 2V RSET = VBATT = 3.5V, closed-loop performance ILOAD falling, RSET = ILOAD rising, RSET =

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Datasheet ID: MAX1898EUB41 647267