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TPSM846C24: Can TPSM846C24 replace TPS846C23 without PMBus function

Kelly Bai
Intellectual 1330 points
Part Number: TPSM846C24
Other Parts Discussed in Thread: TPSM846C23

hi team,

can we use TPSM846C24 replace C23 directly(two phase in parallel)? the PMBus function only used for overcurrent limit setting, so we plan to set PMBus related pin to DNC and test overcurrent performance and also below basic test items, do you have any other suggestions? are there anything we missed?  

  • Board level (under room temperature):

VDD_INT_0V85_Dynamic load

VDD_INT_0V85_Output Voltage Rise Time and Overshoot

VDD_INT_0V85_over current and short circuit protection

VDD_INT_0V85_current sharing

VDD_INT_0V85_Module noise and ripple

VDD_INT_0V85_Vo Setpoint & Load Regulation

 

PHY_DVDD_0V8_Module noise and ripple

PHY_DVDD_0V8_Vo Setpoint & Load Regulation

PHY_DVDD_0V8_Dynamic load

PHY_DVDD_0V8_Output Voltage Rise Time and Overshoot

PHY_DVDD_0V8_over current and short circuit protection

PHY_DVDD_0V8_current sharing

thanks.

  • 0
    TI__Guru 56985 points

     

    Yes, the TPSM846C23 and TPSM84C24 both use the same default 0.5V reference voltage, integrated inductor and control loop parameters.  Without the PMBus command access, the current limit will be set to it's default level, which can allow more current to flow during a short-circuit or overload conduction, but under normal operating conditions, the two modules will operate similarly.