24V Synchronous Buck Converter using low side EiceDRIVER™ 1EDN7550B (TDI)

Open online SPICE simulator circuit link: power_24VDC_Buck_low_side_1EDN7550B_truly_differential_input_concept.tsc

24V Synchronous Buck Converter using 2 low side EiceDRIVER™ 1EDN7550B (TDI)
Concept circut showing Truly Differential Inputs (TDI) advantage

Ground Bounce Effects

1EDN7550B is a new family of single-channel non-isolated gate-driver ICs.
Due to the unique fully differential input circuitry with excellent common-mode
rejection, the logic driver state is exclusively controlled by the voltage difference
between the two inputs, completely independent of the driver’s reference (ground)
potential. This eliminates the risk for wrong triggering and thus is a significant
benefit in all applications exhibiting voltage difference between driver and
controller ground.

{ Please double click here to enter design criteria }

{ Input Voltage [V} }
V_in := 24;
{ Output Current [A] }
I_out := 10;
{ PWM Frequency [HZ] }
Frequency := 500k;
{ PWM Duty Cycle in % }
Duty_Cycle := 50;
{ Time between switching HS OFF and LS ON [us] }
Dead_Time := 200n;
{ Adjustable DC Offset [V] }
DC_Offset := 0;
{ Adjustable AC Distortions [H] }
AC_Distortions := 10n;
{ Ambient Temperature }
TAMB := 25;

Test as follows to see the advantage of the truly differential Input (TDI)
1) simulate ground bounce effects by increasing the value for DC_OFFSET
2) simulate PCB layout constraints by setting higher values for AC_DISTORTIONS

PCB Layout Effects

Collect curves
Product info: BSC010N04LS

Other circuits
Product info: 1EDN7550B
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Evaluation board: EVAL_HB_BC_1EDN8550B
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