Texas Instruments TPS546B24AEVM-2PH, Руководство пользователя, Страница: 5 / 47

1.3 Features
This EVM has the following features:
• Regulated 0.8-V output up to 40-A
DC
steady-state output current
• The output voltage is marginable and trimmable using the PMBus interface
– Programmable UVLO, soft-start, and enable via the PMBus interface
– Programmable overcurrent warning and fault limits and programmable response to faults through the
PMBus interface
– Programmable overvoltage and undervoltage warning and fault limits and programmable response to
faults through the PMBus interface
– Programmable turn-on and turn-off delays
• Convenient test points for probing critical waveforms
2 Electrical Performance Specifications
Table 2-1 lists the electrical performance specifications in room temperature (20 to 25°C). Characteristics are
given for an input voltage of V
IN
= 12 V, unless otherwise specified.
Table 2-1. TPS546B24AEVM-2PH Electrical Performance Specifications
Parameter Test Conditions MIN TYP MAX Unit
Input Characteristics
Input voltage range, V
IN
5 12 18 V
Full load input current I
OUT
= 40 A 3.1 A
Full load input current V
IN
= 5 V, I
OUT
= 40 A 7.3 A
No load input current I
OUT
= 0 A, switching enabled 100 mA
Enable switching threshold
Set by default resistor divider, JP2_P1 and JP2_P2 pins
3 and 4 shorted
5.26 V
Disable switching threshold
Set by default resistor divider, JP2_P1 and JP2_P2 pins
3 and 4 shorted
4.75 V
Output Characteristics
Output voltage, V
OUT
0.8 V
Output load current, I
OUT
0 40 A
Output voltage regulation
Line regulation: V
IN
= 5 V to 18 V 0.1%
Load regulation: I
OUT
= 0 A to 40 A 0.1%
Output voltage ripple I
OUT
= 40 A 9 mVpp
Output voltage undershoot I
OUT
= 10-A to 30-A step at 10 A/µs 100 mV
Output voltage overshoot I
OUT
= 30-A to 10-A step at 10 A/µs 100 mV
Output overcurrent fault threshold
Phase current limit setting of U1_P1 programmed by
MSEL2
26 A
Phase current limit setting of U1_P2 programmed by
MSEL2
26 A
Systems Characteristics
Switching frequency Programmed by MSEL1 550 kHz
Full load efficiency, V
OUT
(1)
I
OUT
= 40 A 86.8%
Operating case temperature I
OUT
= 40 A, 10 minute soak 50 °C
Loop bandwidth
I
OUT
= 20 A
60 kHz
Phase margin 56 °
PMBus Interface and Pin-Strapping
U1_P1 PMBus address Programmed by NVM and ADRSEL 36 Decimal
U1_P1 Voltage reference
Default setting of VOUT_COMMAND programmed by
VSEL
800 mV
U1_P1 Soft-start time (TON_RISE) Default setting of TON_RISE programmed by MSEL2 3 ms
(1) The efficiency is measured using the test points listed in Table 6-2 to minimize the effect of DC drops caused by on-board copper
traces.
www.ti.com Description
SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022
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User's Guide
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