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PDF NCT3527U Data sheet ( Hoja de datos )
| Número de pieza | NCT3527U | |
| Descripción | Power-Distribution Switch | |
| Fabricantes | novoTon | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NCT3527U (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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Nuvoton
Adjustable Current-Limited,
Power-Distribution Switch
NCT3527U
NCT3527U-A
1 page  
NCT3527U/NCT3527U-A
5. PIN DESCRIPTION
PIN NAME I/O DESCRIPTION
1 VOUT O Voltage output pin
2 GND Ground Power ground
3 EN/FLAG# I/O
This is a bi-directional interface pin. As an input pin, pulling up this pin
to enable chip and pulling down to disable chip. As an output pin, this
pin goes low during fault event(s) occurs.
4 DSG
I External resistor used to set output discharge current.
5
ILIM
O
External resistor used to set current limit threshold. This pin cannot be
left floating.
6 VIN Power Supply voltage input pin.
6. FUNCTIONAL DESCRIPTION
Power Switch
The internal power switch is a high-side N-channel MOSFET with low on-state resistance. The
device incorporates an internal charge pump and gate driver circuitry to drive the N-channel
MOSFET. The charge pump supplies power to the driver circuit and provides necessary voltage
to pull the gate of the MOSFET above the source. The charge pump operates from input
voltages as low as 3V and requires little supply current. The driver controls the gate voltage to
limit the power switch. The driver incorporates circuitry that controls the rise and fall times of the
output voltage to limit large current and voltage surges and provides built-in soft start
functionality.
EN/FLAG#
This pin serves as both an input and an output. As an output, a logic level fault flag issues to
host. As an input, if kept inactive (low) by the host, shuts down the power switch. An external pull
up resistor is required.
The FLAG# signal indicates when any of the following conditions occur:
Over-current fault persists beyond the 3-ms deglitch timeout.
The chip temperature exceeds the thermal shut down temperature limit of 150°C.
VIN is below UVLO threshold.
The device features deglitch timeout to blank FLAG# assertion when an over-current condition
occurs. Once the deglitching time has elapsed, this output remains asserted (active low) until
cycling the VIN below the UVLO to reset the switch. Blanking allows momentary over-current to
be ignored, for example, current surges caused by hot-plugging into a capacitive load or when
the device is powering up, thus prevent fault alarm from being relayed to the host system. The
internal over-current deglitch eliminates the need for external components to remove unwanted
Publication Date: Jul., 2014
-3- Revision A0
5 Page 
8. SWITCHING CHARACTERISTICS
NCT3527U/NCT3527U-A
Publication Date: Jul., 2014
-9- Revision A0
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet NCT3527U.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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| NCT3527U-A | Power-Distribution Switch | novoTon |
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