Other Parts Discussed in Thread: LM5166
Customer is planning to use internal +15V & external -15V in voltage mode in order to reduce power dissipation in voltage mode - using internal -15V would drastically increase power dissipation. However, it is observed device consumes high current from -15V even when negative arm is not enabled.
- Is above expected? According to datasheet, VNEG_IN_x is internally shorted to PBKG ==> is this the cause? Is this case, can customer still use external -15V when negative arm is disabled? As this would connect -15V to device substrate.
- Any other setting or workaround to effectively disable the negative arm? Purpose is to reduce power dissipation.