User's Guide
SNVU205 – APRIL 2013
LM5122EVM-2PH Evaluation Module
1
Introduction
The LM5122EVM-2PH evaluation module (EVM) provides the design engineer with a fully functional dual
phase synchronous boost converter to evaluate the Texas Instruments LM5122 synchronous boost
controller device. The EVM provides 28 V output at up to 7 A current from a 9 V to 20 V input. The EVM is
designed to start up from a single power supply without any additional bias voltage.
2
Features and Electrical Performance
•
9 V to 20 V input voltage range
•
28 V target output voltage
•
Up to 7 A output current
•
250 kHz typical switching frequency
•
Dual phase interleaved operation
Table 1. Electrical Performance Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Characteristics
Input Voltage
9
12
20
V
Input Current
V
SUPPLY
= 12 V, I
LOAD
= 7A
17
A
Output Characteristics
Output Voltage
I
LOAD
= 7A
27.02
28
28.98
V
Output Current
7
A
System Characteristics
Switching Frequency
250
kHz
Full Load Efficiency
V
SUPPLY
= 12 V
96%
V
SUPPLY
= 20 V
98%
3
Test Points
3.1
Test Points
Table 2. Pin Descriptions
PIN NAME
DESCRIPTIONS
TP7, TP8
Power Ground
TP5, TP9, TP10
Analog Ground
TP6
UVLO
J1#1
External Synchronization Pulse Positive Input
J1#2
External Synchronization Pulse Negative Input
4
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
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