MAX8814 MAXIM [Maxim Integrated Products], MAX8814 Datasheet
MAX8814
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MAX8814 Summary of contents
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... The MAX8814 accepts an input supply range from 4.25V to 28V, but disables charging if the input voltage exceeds +7V to protect against unqualified or faulty AC adapters. The IC operates over the extended tempera- ture range (-40° ...
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Linear Li+ Battery Charger with Smart Autoboot Assistant ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +30V ABI, BATT, EN, POK to GND....................................-0.3V to +6V ABO to GND............................................-0. ISET to GND .............................................................-0. BATT ...
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Linear Li+ Battery Charger with ELECTRICAL CHARACTERISTICS (continued) = 1MΩ to BATT 0V 5V 4V, R POK IN BATT wise noted. Typical values are +25°C.) (Note 1) A PARAMETER ...
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... IN V 5V/div EN 0V 5V/div 0V V POK 40μs/div CHARGE CURRENT vs. R ISET 1000 100 100 1000 10,000 R (kΩ) ISET AUTOBOOT ENABLED BY INPUT SUPPLY MAX8814 toc12 5V/div V 0V ABI 5V/div 5V/div BATT 0V 5V/div 0V V ABO 4μs/div ...
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... Exposed Paddle. Connect the exposed paddle to a large ground plane for maximum power — EP dissipation. Connect GND to the exposed paddle directly under the IC. _______________________________________________________________________________________ Smart Autoboot Assistant FUNCTION = 1596V / configure the MAX8814 as a USB charger, see FAST-CHARGE ISET > 4.25V and (V IN Pin Description ) ≥ 40mV ≥ ...
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... L MAX8814 Figure 1. Functional Diagram Detailed Description The MAX8814 charger uses voltage, current, and ther- mal-control loops to charge a single Li+ cell and pro- tect the battery (Figure 1). When a Li+ battery with a cell voltage below 2.5V is inserted, the MAX8814 charger enters the prequalification stage where it precharges that cell with 10% of the user-programmed fast-charge current (Figure 2) ...
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... CONSTANT-CURRENT CHARGE 100% CHARGE CURRENT Figure 2. Charge-State Diagram Charger Enable Input The MAX8814 contains an active-low logic input (EN) used to enable the charger. Drive EN low, leave uncon- nected, or connect to GND to enable the charger- control circuitry. Drive EN high to disable the charger- control circuitry. EN has an internal 200kΩ pull-down resistor ...
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... Connect a 1µF ceramic capacitor ). from IN to GND. Use a larger input bypass capacitor ISET for high charging currents to reduce supply noise. The MAX8814 is available in a thermally enhanced TDFN package with an exposed paddle. Connect the exposed paddle to a large copper ground plane to pro ISET vide a thermal contact between the device and the cir- cuit board for increased power dissipation ...
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... The MAX8814 can be configured to charge a battery at the highest current possible from the host port. Figure 4 shows the MAX8814 as a USB battery charger. To make the circuit compatible with either 100mA or 500mA USB ports, the circuit initializes at 100mA charging current ...
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... Linear Li+ Battery Charger with Smart Autoboot Assistant Pin Configuration TOP VIEW BATT POK EN ABO MAX8814 EXPOSED PADDLE + GND ISET ABI TDFN 2mm x 2mm 10 ______________________________________________________________________________________ ...
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Linear Li+ Battery Charger with (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Smart Autoboot Assistant Package Information PACKAGE OUTLINE 6 & 8L ...
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Linear Li+ Battery Charger with Smart Autoboot Assistant (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) COMMON DIMENSIONS MIN. MAX. SYMBOL A 0.70 0.80 ...