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5 Results for Controller ICs for High Side NMOSFET

FAQ Category

Terminal voltage input sequence

Input voltage (VIH / VIL)

Output terminal applied (short / voltage / current)

Input / output reversal (voltage / current)

Output capacitor

EN (CTL, STBY, CE) terminal

Reduced voltage detection (UVLO / LVCC)

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When using high-side and low-side switch ICs as switches (3.3V) for SD, is the input voltage specification of the EN pin the same as when IN=5V?
- The specified input voltage value of the EN (CTRL) pin will not be the same since it is dependent on the supply voltage. When using with IN=3.3V refer to the following graphs in the datasheet. BD6520F and BD6522: Control Input Voltage vs Supply Voltage, BD6524HFV: EN Input Voltage vs Ambient Temperature, and for other models: EN, /EN Input Voltage vs Supply Voltage.

For high-side and low-side switch ICs, when a higher voltage is supplied to the OUT side than the IN side when the switch is OFF, will there be problems (i.e. backflow)?
- Backflow models:
  BD6538G、 BD2224G、 BD2225G、 BD2226G、 BD2227G、 BD2232G、 BD2233G、 BD6538G-LB、 BD2224G-LB、 BD2225G-LB、 BD2226G-LB、 BD2227G-LB、 BD2268G-M、 BD2269G-M、 BD82001FVJ、 BD82000FVJ、 BD82001FVJ-LB、 BD82000FVJ-LB、 BD82004FVJ-M、 BD82005FVJ-M、 BD2200GUL、 BD2201GUL、 BD2202G、 BD2206G、 BD6520F、 BD2202G-LB、 BD2206G-LB、 BUS1DJC0GWZ、 BUS1DJC3GWZ
  . With backflow models, if a higher voltage is supplied to OUT vs IN when the switch is OFF (EN=OFF), current may flow (i.e. through a parasitic diode), which can lead to deterioration and breakdown. If applying a higher voltage to OUT than IN, please use a model that can prevent backflow. Applicable models are described as providing 'reverse current protection while the switch is OFF' in the datasheet.
  Related Link：Technical Document

Is there a problem with connecting a large capacitance capacitor (C_L, USB standard 120uF or more) to the output of high-side and low-side switch ICs?
- There should be no problems even if a large capacitance capacitor (USB standard, 120uF or more) is connected to the output. However, when the IC turns ON and the output rises the capacitor C_L is charged, causing inrush current to flow. Depending on the value of C_L, the inrush current is restricted to the current limit value and the IC enters an overcurrent detection state. If the high-side switch IC continues in this state for more than the /OC pin (flag) output delay time, 'L' is output from the /OC pin.

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