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my customer wants to reach 50ns dead time on LM5105 / LM5102.
our D/S says that deadtime can be adjusted from 100ns to 600ns which seems to tell that 50ns is not achievable
it also says that one can use 5kOhm RDT, which implies deadtime < 80ns because 80ns typ is achieved with 10kOhm.
What shall the customer expect with 5kOhm RDT? (or can they reach 50ns deadtime with LM5105 / LM5102?)
exerpt from LM5105 D/S:
DT1, DT2 Dead-Time LO OFF to HO ON & HO OFF to LO ON /// RDT = 10k /// 80 ns
The LM5105 is a single PWM input Gate Driver with Enable that offers a programmable dead-time. The deadtime
is set with a resistor at the RDT pin and can be adjusted from 100ns to 600ns. The wide dead-time
programming range provides the flexibility to optimize drive signal timing for a wide range of MOSFETS and
The RDT pin is biased at 3V and current limited to 1 mA maximum programming current. The time delay
generator will accommodate resistor values from 5k to 100k with a dead-time time that is proportional to the RDT
resistance. Grounding the RDT pin programs the LM5105 to drive both outputs with minimum dead-time.
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