SNOSDE3C July 2023 – April 2024 TPS7H6003-SP , TPS7H6013-SP , TPS7H6023-SP
PRODUCTION DATA
When operating in PWM mode, resistors to AGND are required on both DLH and DHL to program the dead time. The DHL resistor sets the dead time between high-side output (HO) turn-off to low-side (LO) output turn-on. Likewise, the resistor on DLH sets the dead-time between low-side (LO) turn-off to high-side (HO) turn-on. The resistor can be used to set the dead time from a minimum value of roughly 5 ns up to 100 ns. The resistor must be populated on both pins to operate the device in this mode.
The resistors required to program for desired dead times are calculated from Equation 8 and Equation 9:
where:
where:
Carefully select dead time to prevent cross-conduction between the high-side and low-side switches, while also minimizing losses during this period. The resistors selected for RHL and RLH are recommended to have a tolerance of 1% or better.