DIO58056/B/C/D

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DIO58056/B/C/D• Rev.1.8

Application Information

Typical application

Figure 12. Typical applications W/T LED indicate

Stability considerations

The constant-voltage mode feedback loop is not stable without an output capacitor provided a battery is

connected to the charger output. With no battery present, an output capacitor is recommended to reduce ripple

voltage. When using high value, low ESR ceramic capacitors, it is recommended to add a 1 Ω resistor in series

with the capacitor. No series resistor is needed if tantalum capacitors are used.

In constant-current mode, the ISET pin is in the feedback loop, not the battery. The constant-current mode

stability is affected by the impedance at the ISET pin. With no additional capacitance on the ISET pin, the

charger is stable with program resistor values as high as 51 kΩ. However, additional capacitance on this node

reduces the maximum allowed program resistor thus it should be avoided.

Thermal limit

An internal thermal feedback loop reduces the programmed charge current if the die temperature attempts to

rise above a preset value of approximately 160°C. This feature protects the DIO58056/B/C/D from excessive

temperature and allows the user to push the limits of the power handling capability of a given circuit board

without risk of damaging the DIO58056/B/C/D. The charge current can be set according to typical (not

worst-case) ambient temperature with the assurance that the charger will automatically reduce the current in

worst-case conditions.

Power dissipation