Texas Instruments TPS61181(82/81A)-259 Evaluation Board TPS61181(82/81A)EVM-259 TPS61181AEVM-259 TPS61181AEVM-259 Manual De Usuario
Los códigos de productos
TPS61181AEVM-259
Input/Output Connector Descriptions
2
Input/Output Connector Descriptions
2.1
Input/Output Connections
The connection points are described in the following paragraphs.
2.1.1
J1 - VIN
This header is the positive connection to the input power supply. Twist the leads to the input supply and
keep them as short as possible.
keep them as short as possible.
2.1.2
J2 - GND
This header is the return connection to the input power supply.
2.1.3
J3 - EN
This header connects to the IC's EN pin and must be taken logic high (above 1.2 V but no higher than 7
V) to enable the IC. Removing the logic high signal allows the internal pulldown resistor to pull EN to
ground, which disables the IC.
V) to enable the IC. Removing the logic high signal allows the internal pulldown resistor to pull EN to
ground, which disables the IC.
2.1.4
J4 - CIN/VCC
For the TPS61181 and TPS61182 IC, this header provides a measurement point for the internal LDO that
outputs 3.3 V on the CIN pin. For the TPS61180, an external 3.3-V supply must be applied to this pin in
order for the IC to operate.
outputs 3.3 V on the CIN pin. For the TPS61180, an external 3.3-V supply must be applied to this pin in
order for the IC to operate.
2.1.5
J5 - GND
This header connects to the board's ground plane.
2.1.6
J6 - GND
This header connects to the board's ground plane.
2.1.7
J7 - GND
This header connects to the board's ground plane.
2.1.8
J8 - 14-pin Connector
This header provides connections to the boost converter output (VOUT) and each of the six current
feedback lines (IFBx). With a 14-pin ribbon cable, this header can be connected to WLEDEVM-260,
containing six strings of 12 LEDs, to facilitate evaluation.
feedback lines (IFBx). With a 14-pin ribbon cable, this header can be connected to WLEDEVM-260,
containing six strings of 12 LEDs, to facilitate evaluation.
2.1.9
JP1-DCTRL
Installing this jumper ties the DCTRL dimming control pin to V
CC
, thereby providing 100% WLED dimming
or GND, thereby effectively disabling the internal current regulators. Removing the jumper allows the
internal pulldown resistor to pull DCTRL to ground, which also effectively disables the internal current
regulators.
internal pulldown resistor to pull DCTRL to ground, which also effectively disables the internal current
regulators.
2.1.10
JFB1S-JFB6S
Installing any of these jumpers shorts the corresponding internal current regulator to ground. These
jumpers are intended to assist in testing the TPS61181 and TPS61182's ability to protect itself from a
WLED string accidentally shorting to ground.
jumpers are intended to assist in testing the TPS61181 and TPS61182's ability to protect itself from a
WLED string accidentally shorting to ground.
3
SLVU223B
–
February 2008
–
Revised May 2011
TPS61181EVM-259 / TPS61182EVM-259
Copyright
©
2008
–
2011, Texas Instruments Incorporated