During the output power limiting operation, FLT asserts after a delay of tCL_PLIM_FLT(dly). The FLT signal remains

asserted until the over power load condition is removed and the device resumes normal operation.

Figure 9-11 illustrates output power limiting performance of TPS16632 with 100-W setting for class-2 power

supply designs .

TPS16632

31 PŸ

IN

OUT

dVdT

ILIM

P_IN

RILIM

FLT

GND

SHDN

UVLO

PLIM

MODE

IMON

RIMON

PGOOD

Protected supply

To Load

4.5 V - 60 V

Load Monitor

ON/OFF Control

R2

RPLIM

R1

COUT

CdVdT

Figure 9-10. TPS16632 Typical Application Schematic

RPLIM = 100 kΩ

RILIM = 3 kΩ

Figure 9-11. 100 W class 2, Output Power Limiting Response of TPS16632

9.3.6 Current Monitoring Output (IMON)

The TPS1663x devices feature an accurate analog current monitoring output. A current source at IMON terminal

is internally configured to be proportional to the current flowing from IN to OUT. This current can be converted

into a voltage using a resistor R(IMON) from IMON terminal to GND terminal. The IMON voltage can be used as

a means of monitoring current flow through the system. The maximum voltage (V(IMONmax) for monitoring the

current is limited to 4 V. This limitation puts a limitation on maximum value of R(IMON) resistor and is determined

by Equation 6.

>

@

IMON

OUT

IMON

IMON

V

I

GAIN

R

u

u

(6)

Where,

• GAIN(IMON) is the gain factor I(IMON):I(OUT) = 27.9μA/A (typical)

• I(OUT) is the load current

TPS1663

SLVSET9F – SEPTEMBER 2018 – REVISED FEBRUARY 2023

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