Texas Instruments TPS53513, User Manual

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6 Configurations
All jumper selections should be made prior to applying power to the EVM. The user can configure this EVM per
the following configurations.
6.1 Switching Frequency Selection
Switching frequency can be changed according to Table 6-1 .
Default setting: 1 MHz
Table 6-1. Switching Frequency
SWITCHING FREQUENCY
(F
SW
)(KHZ)
RESISTOR DIVIDER
RATIO (R
DR
)
EXAMPLE RF FREQUENCY COMBINATIONS
R
RF_H
(kΩ) R
RF_L
(kΩ)
1000 > 0.557 1 300
850 0.461 180 154
750 0.375 200 120
600 0.297 249 105
500 0.229 240 71.5
400 0.16 249 47.5
300 0.096 255 27
250 < 0.041 270 11.5
For different switching frequency settings, change R3 and R4 according to Table 6-1 .
6.2 Mode Selection
The MODE can be set by J5.
Default setting: FCCM
Table 6-2. MODE Selection
JUMPERS SET TO: MODE SELECTION
1-2 pin shorted FCCM with 2× RC time constant
3-4 pin shorted Forced CCM
(1)
with 1× RC time constant
5-6 pin shorted Forced CCM
(1)
with 2× RC time constant
7-8 pin shorted Auto-Skip Mode with 2× RC time constant
9-10 pin shorted Auto-Skip Mode with 1× RC time constant
(1) Device goes into FCCM after PGOOD becomes high.
6.3 VDD Pin Supply Selection
The controller can be enabled and disabled by J7.
Default setting: VDD pin connected to VIN pins through R19
Table 6-3. The Controller Can Be Enabled and Disabled by J7
(1)
SET ON CONNECTION ENABLE SELECTION
R19 = 0 Ω VDD pin connected to VIN pins
R19 = Open VDD pin disconnected to VIN pins
(1) J7 requires the proper input voltage for power up. The VDD pin input voltage range is from 4.5 V to 25 V.
Configurations www.ti.com
6 TPS53513 Step-Down Converter Evaluation Module User's Guide SLUUAQ0C – OCTOBER 2013 – REVISED NOVEMBER 2021
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