If no load is connected between OUT1 and OUT2, then no current flows from the internal regulator (AVDD). This OLD example will show why an OLD flag occurs when the H-bridge is open. The voltages on the positive terminal of high-side comparator of OUT1's half-bridge (OL1_HS) and the negative terminal of low-side comparator of OUT2's half-bridge (OL2_LS) will be as follows:

High-side comparator of OUT1's half-bridge (OL1_HS)

Since no current is flowing from AVDD, the voltage on OUT1 (which is also the positive terminal of OL1_HS is clamped to AVDD (for example 4.2 V). OL1_HS has positive input that can be called V_{OL1_HS}(+) and negative input V_{OL_HS}. The V_{OL_HS} is also called the OLD threshold voltage. Since V_{OL1_HS}(+) (4.2 V) is greater than V_{OL_HS} (2.3 V), the OL1_HS output is set to "1".

Low-side comparator of OUT2's half-bridge (OL2_LS)

Since no current flows through the SW2_LS switch, the negative terminal of OL2_LS (V_{OL2_LS}(-)) is pulled down to 0.0 V (GND). OL2_HS has positive input V_{OL_LS}. Since V_{OL_LS} (1.2 V) is greater than V_{OL2_LS}(-) (0.0 V), the OL2_LS output is set to "1". If both OL1_HS and OL2_LS are set to "1", it signifies an OLD.