Datasheet

HARDWARE SETUP www.ti.com
2 HARDWARE SETUP
This section describes the jumpers and connectors of the EVM and how to properly connect, set up and
use the TPS61310EVM-638.
2.1 EVM Hardware Setup
Table 1. Board Input/Output Connector Descriptions
Jumper/Connecter Function
J1 is for the IC positive input supply voltage and ground. The leads to the input supply should be
J1 – VIN/GND twisted and kept as short as possible to minimize EMI transmission and reduce inductive voltage
droop during a load-transient event. V
IN
should be between 2.5V and 5.5V.
J2 is connected to the device output and GND pins. In flash or movie mode, V
OUT
is connected to
the LED anodes and can be used to access the high-side LED voltage. In voltage regulation
J2 – VOUT/GND
mode, the header can be used to measure the regulated output voltage and connect an external
load.
These headers support external LEDs. The LED1 and LED2 headers link the LED cathodes to the
J3 –
device current sinks. The LED anodes are connected to the VOUT output. The TS header is
VOUT/LED1/LED2/TS/GND
provided for the NTC resistor (220kΩ) connection.
J4 is connected to the device I
2
C SCL and SDA. The serial clock and data line can be used to
J4 – SCL/SDA/GND
monitor the traffic between the PC and the EVM or set up I
2
C communication.
J5 – I
2
C Input for the J5 provides a link to the USB-To-GPIO 10-pin ribbon cable interface. The included software uses
USB-To-GPIO the adapter to communicate with the EVM via the I
2
C protocol.
J6 – I
2
C Input for the MSP430 J6 is a 14-pin JTAG interface. It links the device to the MSP430 USB debug interface. The
USB-Debug-Interface MSP430 embedded software uses the adapter to communicate with the EVM via the I
2
C protocol.
This jumper is used to connect the SCL and SDA to two 2.2kΩ pull-up resistors. These resistors
JP1 – I
2
C Pull-Up are either linked to the board input voltage or to ground. In normal use, the I
2
C pull-up resistor
should be connected to Vin. This configuration is due to the I
2
C open-drain architecture.
JP2 is employed if the LED temperature is not monitored. In this case, the TS input should be tied
JP2 – TS
to Vin.
The nReset jumper is directly linked to the device hardware reset input. If this pin is LOW, the
JP3 – nReset device is forced to shutdown mode, and the I
2
C control and all internal control registers are reset.
Otherwise, if nReset = HIGH, the device operates normally.
JP4 is connected to the RF PA synchronization control input of the TPS61310. Tying this input
JP4 – Tx-Mask HIGH switches the LED current from flash to video-light operation. In video-light mode, the peak
current drained from the battery is significantly reduced.
JP5 selects the LED current to a high or low level. If the low current level is selected, the flash
JP5 – STRB1
mode is enabled. In the other configuration, the video light mode is selected.
JP6 – STRB0 JP6 sets STRB0 to Vin or to GND. If STRB0 is HIGH, all the LED current regulators are activated.
The middle pin of JP7 is connected to GPIO/PG on the TPS61310. The jumper is used to set
JP7 – GPIO/PG/XINT
GPIO to a high or a low level.
JP8 allows connecting the GPIO/PG pull-up resistor to Vin. It is used to avoid setting a high level
JP8 – Pull-up Resistor
when the GPIO pin is not used.
JP9, 10 and 11 – Output
These jumpers facilitate LED current measurements.
current evaluation
Table 2. Default Jumper Settings
JUMPER DEFAULT
JP1 High
JP2 Unconnected
JP3 High
JP4 Low
JP5 Low
JP6 High
JP7 Unconnected
JP8 Unconnected
JP9 Connected
2
TPS61310EVM-638 Evaluation Module User Guide SLVU419–April 2011
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