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D.A.S.
D.A.S.
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The MMUN2211LT1 already has a base resistor of 7~13kΩ with an hFE of 35 ~60 but it.

If you apply 2.5V to base resistor it will saturate to 0.2Vmax with 5mA collector current.

added- - I read the above in the product spec. Have you read it? My analysis of this switch is as follows; Output 5mA for input 2.5V/10kΩ nom = 0.25mA which translates to current gain of 20x which is typical for a saturated switch. 5x is common for high current switch.

 

So apply more base voltage to this device. and remove the external base resistor. enter image description here

The MMUN2211LT1 already has a base resistor of 7~13kΩ with an hFE of 35 ~60 but it you apply 2.5V to base resistor it will saturate to 0.2Vmax with 5mA collector current.

So apply more base voltage to this device. enter image description here

The MMUN2211LT1 already has a base resistor of 7~13kΩ with an hFE of 35 ~60.

If you apply 2.5V to base resistor it will saturate to 0.2Vmax with 5mA collector current.

added- - I read the above in the product spec. Have you read it? My analysis of this switch is as follows; Output 5mA for input 2.5V/10kΩ nom = 0.25mA which translates to current gain of 20x which is typical for a saturated switch. 5x is common for high current switch.

 

So apply more base voltage to this device and remove the external base resistor. enter image description here

Source Link
D.A.S.
D.A.S.
  • 148k
  • 3
  • 56
  • 190

The MMUN2211LT1 already has a base resistor of 7~13kΩ with an hFE of 35 ~60 but it you apply 2.5V to base resistor it will saturate to 0.2Vmax with 5mA collector current.

So apply more base voltage to this device. enter image description here