New Charger Maximizes Charging Speed

Posted on Sep 25, 2012

The block diagram in Figure 1 shows the basic functions performed by a battery charger IC using this patented topology*. The LT1511 is a high efficiency 200kHz switching regulator IC in a step-down configuration suitable for charging lithium-ion batteries. It contains multiple feedback loops for constant charge voltage, constant charge current and input current limit.

Low value resistors (RS1 and RS2) are used to sense the charge current and the current drawn from the input power source (AC adapter). The input current limit control loop allows the input power supply or AC adapter to provide current to power noteboo

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