7.4 Device Functional Modes

The mode of operation is determined by the state of DHL and DLH pins during power up. The state of the pins is sampled at power up and cannot be changed during operation. There are two different modes: independent operation where separate HI and LI signals are required, and PWM mode where one PWM input signal is required and the LMG1210 generates the complementary HI and LI signals. For PWM input, the dead time for the low-to-high and high-to-low switch-node transition is independently set by an external resistor at DHL and DLH. For independent input mode, DLH is tied to V_DD and DHL is internally set to high-impedance and can be tied to V_DD, tied to ground or left floating.

Figure 16. Operation Mode Selection

Table 1 lists the functional modes for the LMG1210.