ZHCSMR1C october 2019 – september 2021 UCC5870-Q1
PRODUCTION DATA
VREG2 is internally generated from VCC2. VREG2 regulates to 1.8V with respect to VEE2, and supplies internal circuits on the secondary side. VREG2 requires a 4.7µF bypass capacitance from VREG2 to VEE2 for proper operation. The current out of VREG2 is limited and this current limit is monitored. If the current limit is active for the deglitch time, a internal regulation overcurrent fault is recorded in STATUS3[VREG2_ILIMIT_FAULT] (STATUS3). If unmasked, nFLT1 goes low. Additionally, VREG2 is monitored for both undervoltage and overvoltage conditions. Any VREG2 OV/UV faults are recorded in STATUS3[INT_REG_SEC_FAULT] (STATUS3). Any OV condition on VREG2 causes the VREG2 output to latch off and shuts down the driver output. The VCC2 power must be recycled in order to restart the driver output. Additionally, the driver must be reconfigured to ensure correct operation.