MAX1898EUB41 Maxim Integrated Products, MAX1898EUB41 Datasheet
MAX1898EUB41
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MAX1898EUB41 Summary of contents
Page 1
... 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 ultra- thin µMAX package. Single-Cell Li+ Powered Portables Self-Charging Battery Packs ...
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... CONDITIONS V = 3.9V 4V, IN BATT V = 0.8V EN/ EN/OK 4.5V ≤ V ≤ 12V IN 4.5V ≤ V ≤ 12V IN Done, RSTRT = GND 4.1V for BATT MAX1898EUB42 and 4.0V for MAX1898EUB41 Done, RSTRT = open 4.1V for BATT MAX1898EUB42 and 4.0V for MAX1898EUB41 EN/OK = GND BATT 12V done, RSTRT = open ...
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Linear Charger for Single-Cell Li+ Battery ELECTRICAL CHARACTERISTICS (continued 8V 4V, EN/OK = open, RSET = 2.8kΩ, RSTRT = GND BATT +25°C.) A PARAMETER Maximum Voltage ( ...
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... Linear Charger for Single-Cell Li+ Battery ELECTRICAL CHARACTERISTICS (continued 8V 4V, EN/OK = open, RSET = 2.8kΩ, RSTRT = GND BATT PARAMETER Done, RSTRT = GND, V MAX1898EUB42 and 4.0V for MAX1898EUB41 Done, RSTRT = open, V BATT Input Current MAX1898EUB42 and 4.0V for MAX1898EUB41 EN/OK = GND V V IN, CS Input Current V ...
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Linear Charger for Single-Cell Li+ Battery ( 4V, EN/OK = open, RSET = 2.8kΩ, RSTRT = GND BATT NORMALIZED TIMER PERIOD vs. TEMPERATURE 1.02 NORMALIZED TO +25°C 1.00 0.98 0.96 0.94 0.92 0.90 -15 ...
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... Figure 6): • An external power source is connected AND the cell voltage is above 2.5V. • The cell voltage falls to the restart threshold, 4.0V in the MAX1898EUB42, or 3.9V for the MAX1898EUB41. • The IC is reset by driving the EN/OK pin low and then high again. 6 ...
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Linear Charger for Single-Cell Li+ Battery DC IN 0.1µF LED 5mA CHG CT CHARGING FOR OSC 3hr 100nF CT TIMEOUT ISET RSET (2.8kΩ FOR 500mA CHARGE CURRENT) 280mV ISET (FALLING) CONTROL LOGIC DONE 100kΩ EN/OK ...
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Linear Charger for Single-Cell Li+ Battery 4.2 BATTERY VOLTAGE 4.0 3.8 AMP HOURS BATTERY CURRENT 3.6 3.4 POWER DISSIPATION 3 120 TIME (MINUTES) Figure 2. Li+ Charging Profile the ISET pin is 1mA per amp of ...
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Linear Charger for Single-Cell Li+ Battery power is present at IN. If there is no (or insufficient) voltage at IN, EN/OK will remain low and the charger will remain off. Battery Drain Current The MAX1898 uses advanced CMOS circuitry to ...
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... Ground the RSTRT pin to enable the default restart threshold of 4V for the MAX1898EUB42 and 3.9V for the MAX1898EUB41. Once the battery is charged and the charge timer expires, charging restarts when the cell voltage drops to the restart-threshold voltage. ...
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Linear Charger for Single-Cell Li+ Battery Selecting External Components The MAX1898 drives an external transistor to control charging current. The most important specifications for the pass transistor (MOSFET or bipolar) are current rating and package power dissipation. Since the MAX1898 ...
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... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...