Texas Instruments Evaluation Board for the LM10010 LM10010EVM/NOPB LM10010EVM/NOPB データシート
製品コード
LM10010EVM/NOPB
Powering and Loading Considerations
Figure 1. LM10010 Evaluation Kit Hardware
5.2
Quick Setup Procedure for Board
Step 1: Set the input source current limit to 10A. Turn off the input source. Connect the positive output of
the input source to V
the input source to V
IN
and the negative output to the corresponding GND.
Step 2: Connect the load (with 15A capability) to V
OUT
for the positive connection and GND for the
negative connection.
Step 3: The ENABLE pin should be left open for normal operation.
Step 4: Set the input source voltage to 5V. The load voltage should be in regulation with a nominal 1.0V
output.
output.
Step 5: Slowly increase the load while monitoring the load voltage at V
OUT
. It should remain in regulation
with a nominal 1.0V output as the load is increased up to 15A.
Step 6: Slowly sweep the input source voltage from 2.95V to 5.5V. The load voltage should remain in
regulation with a nominal 1.0V output. If desired, the output of the device can be disabled by connecting
the ENABLE pin to GND.
regulation with a nominal 1.0V output. If desired, the output of the device can be disabled by connecting
the ENABLE pin to GND.
Step 7: The frequency of operation can be varied as desired by connecting a 2.0V square-wave positive
signal between SYNC and GND.
signal between SYNC and GND.
5.3
Powering Up
It is suggested that the load power be kept low during the first power up. Once the device is powered up,
immediately check for 1.0V at the output.
immediately check for 1.0V at the output.
A quick efficiency check is the best way to confirm that everything is operating properly. If something is
amiss you can be reasonably sure that it will adversely affect the efficiency. Few parameters can be
incorrect in a switching power supply without creating losses and potentially damaging temperature.
amiss you can be reasonably sure that it will adversely affect the efficiency. Few parameters can be
incorrect in a switching power supply without creating losses and potentially damaging temperature.
Some voltage supplies can exhibit severe voltage overshoot during high current transients. If a supply
overshoots above 6.0V, damage to the LM21215A-1 or the LM10010 can occur. For these supplies, a
large capacitor across the terminals of the supply (1000µF) can alleviate this problem.
overshoots above 6.0V, damage to the LM21215A-1 or the LM10010 can occur. For these supplies, a
large capacitor across the terminals of the supply (1000µF) can alleviate this problem.
5.4
Over Current Protection
The evaluation board is configured with over-current protection. This function is completely contained in
the LM21215A-1. The peak current is limited to approximately 17A.
the LM21215A-1. The peak current is limited to approximately 17A.
3
SNVA498B – July 2011 – Revised May 2013
AN-2176 LM10010 Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated