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XC6223

Series

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OPERATIONAL EXPLANATION

<Low ESR Capacitor>

<Current Limiter, Short-Circuit Protection>

The protection circuit operates as a combination of an output current limiter and fold-back short circuit protection. When

load current reaches the current limit level, the output voltage drops. As a result, the load current starts to reduce with

showing fold-back curve. The output current finally falls at the level of 50mA when the output pin is short-circuited.

<CE Pin>

The IC's internal circuitry can be shutdown via the signal from the CE pin. In shutdown mode, the XC6223B/D/F/H series

the XC6223A/B/E/F series because of a high active and no pull-down. On the other hand, the XC6223C/D/G/H series has a

pull-down resistor at the CE pin inside, so that the CE pin input current flows.

<Thermal Shutdown>

The over heat protection circuit is built-in with the XC6223 series. When the junction temperature of the IC reaches the

temperature limit level (150℃ TYP.), the thermal shutdown circuit operates and the driver transistor will be turned off.

The IC resumes its operation when the thermal shutdown function is released as a result of the junction temperature drops

to the release point.

<Inrush Current Protection>

The inrush current protection circuit is built in the XC6223 series.

function is built in the XC6223E/F/G/H series.

The voltage divided by resistors R1 & R2 is compared with the

internal reference voltage by the error amplifier. The

P-channel

controlled and stabilized by a system of negative feedback. The

current limit circuit and short circuit protection operate in relation to

the level of output current and heat dissipation. Further, the IC’s

internal circuitry can be shutdown via the CE pin signal.