J21 Power Supply Control
This jumper is used to disable or select
power supplies for the board
Table 2-4 Power Supply Control
| Pins |
Label |
Description |
| 1-2 |
5V EN |
Enable Buck Regulator to generate VCC5V |
| 3-4 |
5V-LDO |
Connect LDO_5V to VCC5V |
| 5-6 |
3V3 1V1EN |
Enable the LDO to generate VCC3V3 and VCC1V1 for Hub and MCU |
J10 I2C Connection Jumper
This jumper block expands the I2C1
connections of TPS25772-Q1 and can connect to GPIO expander, I2C temperature sensor and
EEPROM. Since I2C bus can support multiple targets, TI recommends to connect all pins.
Table 2-5 J10 I2C Connection Jumper
| Pins |
Label |
Description |
| 1-2 and 3-4 |
TCA640 GPIO |
Connect the I2C1 Bus of the TPS25772-Q1 to the TCA640 GPIO Expander |
| 4-5 and 7-8 |
LM75 Temp Sense |
Connect the I2C1 Bus of the TPS25772-Q1 to LM75 Temperature Sensor |
| 9-10 and 10-11 |
EEPROM |
Connect the I2C1 Bus of the TPS25772-Q1 to the TCA640 EEPROM |
J1, J2, J23, J24, and J25 TPS55289-Q1
Jumpers
The TPS55289-Q1 device has several
connection options that are supported by the TPS25772-Q1. The five listed jumpers offer the
following feature controls:
- IRQ connection
- Select between GPIO, TPS25772-Q1, and
UVLO divider enable of TPS55289-Q1
- Dither vs sync selection
- I2C address selection
Table 2-6 J1: GPIO9 connect to IRQZ pin of
MCU
| Pins |
Description |
| 1-2 |
Connect GPIO9 of TPS25772-Q1 to the IRQ1 pin of the USB MCU |
| Open |
Do Not connect GPIO9 of TPS25772-Q1 to the IRQ1 pin of the USB MCU |
Table 2-7 J2: TPS55289 Enable Selection
| Pins |
Description |
| 1-2 |
Connect GPIO9 to the EN/UVLO pin of the TPS55289-Q1 |
| Open |
Do not connect GPIO9 of TPS25772-Q1 to EN/UVLO pin of the TPS55289-Q1 |
Table 2-8 J23: TPS55289 Enable Selection
| Pins |
Description |
| 1-2 |
Connect GPIO9 to the EN/UVLO pin of the TPS55289-Q1 |
| 2-3 |
Connect BJ_LDO_3V3 to the EN/UVLO pin of the TPS55289-Q1 |
| Open |
EN/UVLO controlled by resistor divider from VIN (This divider is DNP and must
be populated to support this option) |
Table 2-9 J24: Sync/Dither Selection
| Pins |
Description |
| 1-2 |
Connect the dither capacitor to the DITH/SYNC pin of the TPS55289-Q1 |
| 2-3 |
Connect the sync pin of the TPS25772-Q1 to the DITH/SYNC pin of the
TPS55289-Q1 |
Table 2-10 J25: I2C Address Selection
| Pins |
Description |
| 1-2 |
TPS55289-Q1 I2C address 75h |
| 2-3 |
TPS55289-Q1 I2C address 74h |
J3 NTC Selection Jumper
The J3 header is used to verify the Thermal Foldback function. The NTC pin detects the
voltage of an external NTC circuit and can be connected to a thermistor (NTC or PTC) divider
or NTC_VAR. NTC_VAR is the output of TPL0102, which is a I2C digital potentiometer. The
divider footprints allow the use of either PTC or NTC resistors to match what is used in the
system represented. Another option is to remove the jumper and directly connect pin 2 of the
J3 header to an external voltage. This combination is used to test the Thermal Foldback
function. The thermistor assembled on the EVM is a positive temperature coefficient
(PTC).
Table 2-11 J3 NTC Selection Jumper
| Pins |
Label |
Description |
| 1-2 |
NTC |
Connect NTC resistor to TPS25772DQ1 NTC pin |
| 2-3 |
NTC VAR |
Connect the digital Pot to the NTC pin |
J8 TMP75B-Q1 Alert Connection
Jumper
Table 2-12 J8 TMP75BQ1 Alert Connection
Jumper
| Pins |
Label |
Description |
| 1-2 |
IRQ |
Connect the active low output of the TMP75B-Q1 pin to the IRQ pin (GPIO9 of the
TPS25772-Q1) |
| 3-4 |
NTC |
Connect the Active Low output of the Alert pin of the TMP75B-Q1 to the NTC pin
of the TPS25772-Q1 |
| 5-6 |
NTC |
Connect the inverted (active high) output of the alert pin of the TMP75B-Q1 to
the NTC pin of the TPS25772-Q1 |
Figure 2-4 J13 TVSP Jumper
Figure 2-5 J21 Power Supply Control
Figure 2-6 J10 I2C Connection Jumper
Figure 2-7 J1, J2, J24, J25, and J23: TPS55289-Q1
Jumpers
Figure 2-8 J3 NTC Selection Jumper
Figure 2-9 J8 TMP75BQ1 Alert Connection
Jumper