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Datasheet MAX1647 - Chemistry-Independent Battery Chargers - Maxim Integrated Products

Chemistry-Independent Battery ChargersMAX1647/MAX1648

Table 1a. Component Selection for Figure 3 Circuit (Also Use for Figure 4)

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Datasheet MAX1647 - Chemistry-Independent Battery Chargers - Maxim Integrated Products

Chemistry-Independent

Battery Chargers

Table 1b. Component Suppliers

_______________Detailed Description

Output Characteristics

The MAX1647/MAX1648 contain both a voltage-regulation loop and a current-regulation loop. Bothloops operate independently of each other. The volt-age-regulation loop monitors BATT to ensure that itsvoltage never exceeds the voltage set point (V0). Thecurrent-regulation loop monitors current delivered toBATT to ensure that it never exceeds the current-limitset point (I0). The current-regulation loop is in controlas long as BATT voltage is below V0. When BATT volt-age reaches V0, the current loop no longer regulates,and the voltage-regulation loop takes over. Figure 5shows the V-I characteristic at the BATT pin.

Figure 4. MAX1648 Typical Operating Circuit

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MAX1647/MAX1648