Texas Instruments 8-14V Vin, 1.8V Vout Synchronous Buck Converter Evaluation Module for TPS40305 TPS40305EVM-488 TPS40305EVM-488 数据表
产品代码
TPS40305EVM-488
Channel B
20
LOG
Channel A
æ
ö
´
ç
÷
è
ø
0
2
4
6
8
10
I - Load Current - A
L
50
55
60
65
70
75
80
85
90
95
h
-Efficiency-%
8 V
12 V
14 V
V
= 8 V-14 V,
V
= 1.8 V,
I
= 0-10 A
IN
OUT
OUT
TPS40305EVM-488 Test Data
www.ti.com
2. Connect a 1-kHz – 1-MHz isolation transformer to TP5 and TP7 as shown in
3. Connect input signal amplitude measurement probe (channel A) to TP7 as shown in
4. Connect output signal amplitude measurement probe (channel B) to TP5 as shown in
5. Connect ground lead of channel A and channel B to TP6 and TP8 as shown in
6. Inject 30mV or less signal across R3 through isolation transformer
7. Sweep frequency from 1kHz to 1MHz with 10-Hz or lower post filter
7. Sweep frequency from 1kHz to 1MHz with 10-Hz or lower post filter
8. Control loop gain can be measured by
9. Control loop phase can be measured by the phase difference between channel A and channel B
10. Control to output response (power stage transfer function) can be measured by connecting channel A
9. Control loop phase can be measured by the phase difference between channel A and channel B
10. Control to output response (power stage transfer function) can be measured by connecting channel A
probe to TP10 (COMP) and channel B probe to TP5 (CHB)
11. Output to control response (compensated error amplifier transfer function) can be measured by
connecting channel A probe to TP7 (CHA) and channel B probe to TP10 (COMP)
12. Follow section 5.3 Start-Up / Shut-Down Procedure steps 6 and 7 to power down
5.6
Equipment Shutdown
1. Shut down oscilloscope
2. Shut down LOAD1
3. Shut down VIN
4. Shut down fan
2. Shut down LOAD1
3. Shut down VIN
4. Shut down fan
6
TPS40305EVM-488 Test Data
through
present typical performance curves for the TPS40305EVM-488. Since actual
performance data can be affected by measurement techniques and environmental variables, these curves
are presented for reference and may differ from actual field measurements.
are presented for reference and may differ from actual field measurements.
6.1
Efficiency
V
IN
= 8.0V – 14V, V
OUT
= 1.8V, I
OUT
= 0A – 10A
Figure 5. TPS40305EVM-488 Efficiency vs Load Current
10
TPS40305EVM-488
SLUU406 – February 2010
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