Texas Instruments LM10500, Руководство пользователя

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3 5 7 9 11 13 15 17
5
6
7
8
9
10
Q
U
IESC
EN
T
C
U
R
R
EN
T
(
mA
)
INPUT VOLTAGE (V)
-40°C
25°C
85°C
Figure 10-7. I
Q
When EN = 1, I
OUT
= 0, FPWM = 0
0 20 40 60 80 100 120 140 160 180
0
200
400
600
800
1000
1200
1400
1600
1800
F
R
EQ
U
EN
C
Y
(
kH
z
)
RFRQ(k )
-40°C
25°C
125°C
Figure 10-8. Switching Frequency (kHz)
vs.
R
FRQ
(kΩ)
PWROK 0.5V/DIV
Inductor Current 1A/DIV
Output Voltage 0.2V/DIV
EN 1V/DIV
1 ms/DIV
1.2V
5A
Figure 10-9. Soft Start With 5 A Load,
Triggered By EN Rising Edge
PWROK 0.5V/DIV
Inductor Current 0.5A/DIV
Output Voltage 0.2V/DIV
EN 1V/DIV
1 ms/DIV
0.5V
1.2V
Figure 10-10. Soft Start With 0.5V Pre-bias Voltage,
DCM Operation,
Triggered By PWI 'Wakeup' Command
PWROK 0.5V/DIV
Inductor Current 0.5A/DIV
Output Voltage 0.2V/DIV
EN 1V/DIV
1 ms/DIV
0.5V
1.2V
Figure 10-11. Soft Start With 0.5V Pre-bias Voltage,
CCM Operation,
Triggered By PWI 'Wakeup' Command
Output Voltage 20 mV/DIV AC coupling
Inductor Current 1A/DIV
Switch Node 2V/DIV
2 µs/DIV
1.2V
5A
Figure 10-12. Switching Waveform With 5 A Load
Typical Performance Characteristics www.ti.com
12 LM10500 Step-Down Converter Evaluation Module User's Guide SNVA453B – AUGUST 2011 – REVISED JANUARY 2022
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