Texas Instruments TPS53915, User Manual

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6 Configurations
All jumper selections must be made prior to applying power to the EVM. Configure this EVM using the following
configuration selections.
6.1 PMBus Address Selection
The PMBus address can be changed as shown in Table 6-1 .
Table 6-1. PMBus Address Selection Settings
PMBus ADDRESS
RESISTOR DIVIDER RATIO (Ω) (R
HIGH
) (kΩ)
HIGH-SIDE
RESISTOR
(R
LOW
) (kΩ)
LOW-SIDE
RESISTOR
(R
LOW
/R
LOW
+R
HIGH
) MIN MAX
0011111
> 0.557 1 300
0011110
0.5100
0.4958 0.5247
160 165
0011101
0.4625
04482 0.4772
180 154
0011100
0.4182
0.4073 0.4294
200 143
0011011
0.3772
0.3662 0.3886
200 120
0011010
0.3361
0.3249 0.3476
220 110
0011001
0.2985
0.2905 0.3067
249 105
0011000
0.2641
0.2560 0.2725
249 88.7
0010111
0.2298
0.2215 0.2385
240 71.5
0010110
0.1955
0.1870 0.2044
249 60.4
0010101
0.1611
0.1524 0.1703
249 47.5
0010100
0.1268
0.1179 0.1363
249 36.0
0010011
0.0960
0.0900 0.1024
255 27.0
0010010
0.0684
0.0622 0.0752
255 18.7
0010001
0.0404
0.0340 0.0480
270 11.5
0010000
< 0.013 300 1
For different switching frequency setting, please change R3 and R4 as shown in Table 6-1 .
6.2 Mode Selection
The MODE can be set by J5.
Table 6-2. Mode Selection
JUMPER SET TO: MODE SELECTION
1 to 2 pin shorted FCCM with 2× RC time constant
3 to 4 pin shorted
(1)
FCCM
(2)
with 1× RC time constant
(1)
5 to 6 pin shorted FCCM
(2)
with 2× RC time constant
7 to 8 pin shorted Auto-skip mode with 2× RC time constant
9 to 10 pin shorted Auto-skip mode with 1× RC time constant
(1) Default setting
(2) The device enters FCCM after PGOOD goes high.
6.3 VDD Pin Supply Selection
The controller can be enabled and disabled by J7.
Configurations www.ti.com
6 TPS53915 Step-Down Converter Evaluation Module User's Guide SLUUAS2C – OCTOBER 2013 – REVISED NOVEMBER 2021
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