MAX1679EUA+ Maxim Integrated Products, MAX1679EUA+ Datasheet
MAX1679EUA+
Specifications of MAX1679EUA+
Related parts for MAX1679EUA+
MAX1679EUA+ Summary of contents
Page 1
... MAX1679 CHG 3 TSEL 4 MAX ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Single-Cell Li+ Battery Charger for Current-Limited Supply Simple Stand-Alone Application Circuit Lowest Power Dissipation 8-Pin µMAX Package Saves Space No Inductor Required 0 ...
Page 2
Single-Cell Li+ Battery Charger for Current-Limited Supply ABSOLUTE MAXIMUM RATINGS IN, CHG, GATE to GND ........................................ -0.3V to +26V BATT, TSEL, THERM, ADJ to GND ........................ -0.3V to +6V GATE to IN................................................................-6V to +0.3V THERM, ADJ to BATT...............................................-6V to +0.3V ...
Page 3
ELECTRICAL CHARACTERISTICS (continued +10V +4.2V, TSEL = GND, GATE = unconnected, ADJ = unconnected, THERM = 10kΩ to GND, T CHG IN BATT to +85°C, unless otherwise noted. Typical values are at T PARAMETER ...
Page 4
Single-Cell Li+ Battery Charger for Current-Limited Supply ELECTRICAL CHARACTERISTICS (continued +10V +4.2V, TSEL = GND, GATE = unconnected, ADJ = unconnected, THERM = 10kΩ to GND, T CHG IN BATT to +85°C, unless otherwise ...
Page 5
+10V, V BATT = +4.2V, THERM = 10kΩ to GND +25°C, unless otherwise noted.) CHG TIMER PERIOD vs. AMBIENT TEMPERATURE 1.0200 NORMALIZED TO +25°C 1.0150 1.0100 1.0050 1.0000 0.9950 0.9900 -40 -20 ...
Page 6
Single-Cell Li+ Battery Charger for Current-Limited Supply CURRENT-LIMITED VOLTAGE SOURCE (800mA) REVERSE-CURRENT PROTECTION DIODE MAX1679 TRICKLE CHARGE (5mA) TSEL STATE MACHINE SEE TABLE 3 FOR TIMEOUT OPTIONS TIMER 30kHz OSCILLATOR HOT QUAL TEST CURRENT * OPTIONAL ** R = 410k ...
Page 7
CELL NOT INSTALLED (FROM ANY STATE) PREQUALIFICATION LED: 50% DUTY CYCLE, 2Hz PMOS FET: OFF 5mA PRECHARGE: ON TEMPERATURE NOT < 2.5V BATT FAST-CHARGE QUALIFICATION LED: ON PMOS FET: OFF TEMPERATURE NOT OK TOP-OFF QUALIFICATION LED: ON ...
Page 8
Single-Cell Li+ Battery Charger for Current-Limited Supply Detailed Description Initiating a Charge Cycle The MAX1679 attempts to initiate fast-charge upon insertion of the battery or application of an external power source (current-limited wall cube). After charge completion, charging restarts when ...
Page 9
Applications Information The MAX1679 was designed to offer the maximum inte- gration and functionality in the smallest, most basic application circuit possible. The only necessary exter- nal components are a current-limited wall cube, a PMOS FET, two small capacitors, and ...
Page 10
Single-Cell Li+ Battery Charger for Current-Limited Supply Table 3. Timer Option (TSEL) Definitions TSEL RECOMMENDED CONNECTION CHARGE RATE BATT 1.5C ADJ 1C GND <1C Selecting Maximum Charge Time As a safety feature, fast-charging and pulsed top-off charging will stop if ...
Page 11
Layout Guidelines The MAX1679 controls the GATE slew rate. The layout is not as sensitive to noise as a high-frequency switching regulator. In addition, since the cell voltage is sensed both during and between high-current pulses, the sys- tem is ...
Page 12
... Maxim reserves the right to change the circuitry and specifications without notice at any time. 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 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...