Hi Support team
This model has encountered a malfunction of the discharge circuit, please help confirm whether there is any doubt about the application of IC150
The discharge circuit is as follows
1. In normal operating, VRA 1.4V or more. what is VKA voltage under this condition?
2. Is there a curve corresponding to the temperature of VRA and VKA ?
3. In D/S IKA is 10mA, the current application is only about 3~4mA, will it affect it?
Hi Red,
1. In normal operating, VRA 1.4V or more. what is VKA voltage under this condition?
The voltage going to the shunt regulator should be 1.24V. Can you tell me why VRA is 1.4V or higher? Too high of a voltage and without limiting the current going into the pin can violate the IREF max spec value of 3mA.
For VKA, the voltage between R701 and R157 is around a VBE (~0.7V). Therefore, the voltage at VKA should be 2VBE because the values for both resistors are the same.
2. Is there a curve corresponding to the temperature of VRA and VKA ?
3. In D/S IKA is 10mA, the current application is only about 3~4mA, will it affect it?
No.
Ben
thanks Ben,
as following circuit, while Vin < Vref, Vout = V+,
when Vin > Vref, what is Vout value?
Hi Red,
Since the circuit is using bipolar devices, the voltage between R701 and R157 is around a VBE (~0.7V). Therefore, the voltage at VKA should be 2VBE because the values for both resistors are the same.
The picture that you have shown above does not have a "clamp" on VOUT.
Ben
