EVM Characteristics
7
SNVU620A – September 2018 – Revised April 2019
Copyright © 2018–2019, Texas Instruments Incorporated
LM5164-Q1 EVM User Guide
3
EVM Characteristics
(1)
The default output voltage of this EVM is 12 V. Efficiency and other performance metrics will change based on the operating
input voltage, output voltage, load current, output capacitance, and other parameters.
Table 2. EVM Electrical Performance Characteristics
Parameter
Test Conditions
MIN
TYP
MAX
UNITS
INPUT CHARACTERISTICS
Input voltage range, V
VIN
EVM input voltage operating range
15
48
100
V
Input voltage turn on, V
IN(ON)
Adjusted by EN/UVLO resistors
6.0
V
Input voltage turn off, V
IN(OFF)
5.6
V
Input voltage hysteresis, V
IN(HYS)
0.4
V
Input current, no load, I
IN(NL)
I
OUT
= 0 A
V
IN
= 24 V
44
µA
V
IN
= 48 V
60
µA
Input current, disabled, I
IN(OFF)
V
EN/UVLO
= 0 V
V
IN
= 24 V
29
µA
OUTPUT CHARACTERISTICS
Output voltage, V
OUT
(1)
V
OUT
follows V
IN
for V
IN
< 12V
12.0
V
Output current, I
OUT
V
VIN
= 15 V to 100 V
0
1
A
Output voltage regulation,
Δ
V
OUT
Load regulation
I
OUT
= 0.1 A to 1 A
0.75%
Line regulation
V
VIN
= 15 V to 100 V
1.5%
Output voltage ripple, V
OUT(AC)
V
IN
= 48 V, I
OUT
= 1 A
30
mVp-p
Output overcurrent protection, I
OCP
V
IN
= 48 V
1.4
A
Soft-start time, t
SS
3
ms
SYSTEM CHARACTERISTICS
Switching frequency in CCM, F
SW(nom)
V
IN
= 48 V
300
kHz
Half-load efficiency,
η
HALF
(1)
I
OUT
= 0.5 A
V
IN
= 24 V
95%
Full load efficiency,
η
FULL
I
OUT
= 1 A
V
IN
= 15 V
93.2%
V
IN
= 24 V
93.4%
V
IN
= 48 V
92.1%
V
IN
= 100 V
86%
4
LM5164-Q1 Evaluation Module
The LM5164-Q1 EVM is configured to deliver 12 V and 1 A at a switching frequency of 300 kHz. As
shown in
, a type 3 ripple generation circuit is used to generate the appropriate voltage ripple on
FB. This circuit uses an RC network (consisting of R
A
and C
A
) between SW and V
OUT
to create a triangular
ramp. This triangular ramp is then AC coupled into the feedback node with capacitor C
B
. This method is
best suited for applications where low output voltage ripple is required and where ceramic output
capacitors are used (since it is not using the output voltage to generate the ripple signal).
4.1
Quick Start Procedure
1. Connect the voltage supply between VIN and GND connectors using short wires.
2. Connect the load of the converter between VOUT and GND connectors using short wires.
3. Set the supply voltage (V
VIN
) at an appropriate level between 15 V to 100 V. Set the current limit of the
supply to an appropriate level as well.
4. Turn on the power supply. The EVM powers up and provides V
OUT
= 12 V.
5. Monitor the output voltage while increasing the load current to 1 A max.
See
for the location of the connectors.
