Texas Instruments TPS54262EVM Evaluation Module TPS54262EVM TPS54262EVM Datenbogen
Produktcode
TPS54262EVM
ENA
ENA
Disabled
Enabled
SR
SR
SR
SR
1 V/2.5 ns
1 V/4 ns
1 V/6 ns
1 V/1.2 ns
Delay
Delay
Delay
Delay
2.2 ms
47 ms
150 ms
200 ms
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Setup
Figure 2. Enable Jumper Settings
JP3 – Slew Rate is the jumper used to set the slew rate for the switch pin. The device slew rate should be
set between 15ns and 200ns. Slower slew rates can improve EMI performance, but they will increase
switching losses. Jumper resistors allow the slew rate to be set to four set points. The user can set a
specific slew rate by changing one of the slew rate set resistors – R8, R9 or R10. Note that the slew rate
should be set to 1V/1.2ns, if the EVM is configured for a 2MHz switch in frequency.
set between 15ns and 200ns. Slower slew rates can improve EMI performance, but they will increase
switching losses. Jumper resistors allow the slew rate to be set to four set points. The user can set a
specific slew rate by changing one of the slew rate set resistors – R8, R9 or R10. Note that the slew rate
should be set to 1V/1.2ns, if the EVM is configured for a 2MHz switch in frequency.
Figure 3. Slew Rate Settings
JP4 – Delay is the jumper used to set the delay time to assert the RESET pin low after the supply has
exceeded the programmed Vreg_RST voltage. The delay may be programmed in the range of 2.2 ms to
200 ms. Jumper capacitors allow the reset delay to be set to four set points. The user can set a specific
delay time by changing one of the delay capacitors – C13, C14 or C15.
exceeded the programmed Vreg_RST voltage. The delay may be programmed in the range of 2.2 ms to
200 ms. Jumper capacitors allow the reset delay to be set to four set points. The user can set a specific
delay time by changing one of the delay capacitors – C13, C14 or C15.
Figure 4. Reset Delay Time Settings
2.2
Setup
The input voltage range for the converter is 3.6 volts to 48 volts. A load should be applied to the Output
terminal for proper operation.
terminal for proper operation.
2.3
Operation
For proper operation of the TPS54262, JP1, JP2, JP3 and JP4 should be properly configured. The
recommended setting, using shorting blocks.
recommended setting, using shorting blocks.
JP1 to Enabled
JP2 to Enabled
JP3 to 1V/2.5ns
JP2 to Enabled
JP3 to 1V/2.5ns
3
SLVU344 – October 2009
TPS54262EVM
Copyright © 2009, Texas Instruments Incorporated