TPS1663_V03 datasheet(28/46 Pages) TI1

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SHDNb

VOUT

PGOOD

IIN

Figure 10-8. Turn OFF Using SHDN Control

10.3 System Examples

10.3.1 Simple 24-V Power Supply Path Protection

With the TPS1663x, a simple 24-V power supply path protection can be realized using a minimum of three

external components, as shown in the schematic diagram in Figure 10-9. The external components required are

a R(ILIM) resistor to program the current limit and C(IN) and C(OUT) capacitors.

TPS16632

31 PŸ

OUT

dVdT

ILIM

P_IN

RILIM

FLT

GND

SHDN

UVLO

PLIM

MODE

IMON

PGOOD

VIN

ON/OFF Control

COUT

VOUT

CIN

Figure 10-9. TPS16630 Configured for a Simple Power Supply Path Protection

Protection features with this configuration include:

• 39-V (maximum) overvoltage clamp output

• Inrush current control with 24-V/500-µs output voltage slew rate

• Accurate current limiting with auto-retry

10.4 Power Supply Recommendations

The TPS1663x eFuse is designed for the supply voltage range of 4.5 V ≤ VIN ≤ 60 V. If the input supply is

located more than a few inches from the device, TI recommends an input ceramic bypass capacitor higher than

0.1 μF. Power supply must be rated higher than the current limit set to avoid voltage droops during overcurrent

and short circuit conditions.

10.4.1 Transient Protection

In case of short circuit and overload current limit, when the device interrupts current flow, input inductance

generates a positive voltage spike on the input and output inductance generates a negative voltage spike on the

output. The peak amplitude of voltage spikes (transients) depends on the value of inductance in series to the

TPS1663

SLVSET9F – SEPTEMBER 2018 – REVISED FEBRUARY 2023

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