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MAX17006A Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX17006A Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 23 page 1.2MHz, Low-Cost, High-Performance Chargers ______________________________________________________________________________________ 11 CSA A = 17.5V/V CSSN CSSP Gm = 2.8 μA/mV IINP GMS CSIN CSIP GMI ISET 26mV CHARGER SHUTDOWN CELL SELECT LOGIC BATT VAA VCTL GMV CC LOWEST VOLTAGE CLAMP CSI 60mV PWM FILTER DHI DLO PGND LX BST LEVEL SHIFT HIGH-SIDE DRIVER LOW-SIDE DRIVER CCMP IMIN IMAX IZX 10mV OVP DC-DC CONVERTER 110mV 10mV BDIV BDIV VCTL + 100mV 5.4V LINEAR REGULATOR 4.2V REFERENCE DCIN LDO VAA POWER FAIL LDO AGND BATT VAA/2 ACOK LDO ACIN MAX17005A MAX17006A MAX17015A CSA A = 17.5V/V Figure 2. Functional Diagram The MAX17005A/MAX17006A/MAX17015A feature a voltage-regulation loop (CCV) and two current-regula- tion loops (CCI and CCS). The loops operate indepen- dently of each other. The CCV voltage-regulation loop monitors BATT to ensure that its voltage never exceeds the voltage set by VCTL. The CCI battery charge cur- rent-regulation loop monitors current delivered to BATT to ensure that it never exceeds the current limit set by ISET. The charge current-regulation loop is in control as long as the battery voltage is below the set point. When the battery voltage reaches its set point, the voltage- regulation loop takes control and maintains the battery voltage at the set point. A third loop (CCS) takes control and reduces the charge current when the adapter cur- rent exceeds the input current limit. The MAX17005A/MAX17006A/MAX17015A have single- point compensation. The two current loops are internal- ly compensated while the voltage loop is compensated with a series RC network at CC pin. See the CC Loop Compensation section for the resistor and capacitor selection. A functional diagram is shown in Figure 2. |
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