JAJSQS4C July 2023 – April 2024 TPS7H6003-SP , TPS7H6013-SP , TPS7H6023-SP
PRODUCTION DATA
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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.