Texas Instruments Evaluation Module for TPS61257 TPS61257EVM-711 TPS61257EVM-711 Datenbogen
Produktcode
TPS61257EVM-711
Connector and Test Point Descriptions
3.2
Output Connectors
3.2.1
J4: VOUT
This header is the positive connection of the output voltage. Connect the load between these pins and J6
(GND).
(GND).
3.2.2
J5: Output Sense Connector
This header is intended to measure the output voltage directly on the output capacitors.
3.2.3
J6: GND
This header is the return connection of the output voltage. Connect the load between these pins and J4
(VOUT).
(VOUT).
3.3
Other Connectors
3.3.1
J7: SMA Output Connector
This SMA connector is connected to the output voltage of the converter. It can be used to easily analyze
the noise spectrum of the output voltage with a spectrum analyzer. By default, J7 is not assembled on the
EVM.
the noise spectrum of the output voltage with a spectrum analyzer. By default, J7 is not assembled on the
EVM.
3.3.2
J8 SMA Input Connector
This SMA connector is connected to the input voltage of the converter. It can be used to easily analyze
the noise spectrum of the input voltage with a spectrum analyzer. By default, J8 is not assembled on the
EVM.
the noise spectrum of the input voltage with a spectrum analyzer. By default, J8 is not assembled on the
EVM.
3.4
Jumpers
3.4.1
JP1: Enable Jumper
Placing a jumper across pins EN and ON ties the EN pin to VIN, and enables the device. Placing a jumper
across pins EN and OFF ties the EN pin to GND, which disables the device.
across pins EN and OFF ties the EN pin to GND, which disables the device.
3.4.2
JP2 Bypass
JP2 is the operating mode selection pin of the device and is only of relevance when the device is disabled
(EN = low). Placing a jumper between BP and Low selects shutdown (that is, true load disconnect mode);
thus, the device is in shutdown mode when EN is pulled low.
(EN = low). Placing a jumper between BP and Low selects shutdown (that is, true load disconnect mode);
thus, the device is in shutdown mode when EN is pulled low.
Placing a jumper between BP and High selects bypass mode. The output is biased at the input voltage
level with a maximum load current capability of approximately 150 mA when EN is pulled low. In this
mode, the device consumes only a standby current of 18
level with a maximum load current capability of approximately 150 mA when EN is pulled low. In this
mode, the device consumes only a standby current of 18
μ
A (typ).
4
TPS6125xEVM
SLVU427
–
September 2011
Copyright
©
2011, Texas Instruments Incorporated