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Performance Specifications
3
SLUUBM0 – May 2017
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Copyright © 2017, Texas Instruments Incorporated
TPS92518EVM Dual Buck Controller Evaluation Module
Table 1. Connector Descriptions (continued)
Connector
Label
Description
J13 and J15
PWM jumpers
J13 and J15 are jumpers provided to allow for PWM signals to the two channels to
be generated from an LEDSPIMCUEVM-879 (when populated) or applied from an
external source (when jumper is removed and the signal is connected to pin 1 one
of the connector). J13 provides PWM to channel 1 of the chip, while J15 provides
PWM to channel 2.
J9
SSN configuration
jumper
J9 allows configuration of the SSN chip select line for use with multiple chips on the
same SPI bus.
J8
MISO
This jumper enables configurations: shorting pins 5–6 sets the SPI communication
architecture up for a single TPS92518 or the end point of a daisy chain of them,
shorting 1–2 and 5–6 sets up for a TPS92518 in the middle of a daisy-chain, and
shorting 3–4 and 5–6 provides for a star architecture.
J7
SPI DI out
If this jumper is closed, it allows multiple TPS92518 devices to be connected in a
star configuration.
J10
Control connector
This connector allows the TPS92518 board to attach to a microcontroller, such as
the LEDSPIMCUEVM-879.
Table 2. Test Points
Test Point
Description
Metal turrets
All metal turrets are grounds.
PWM1 and PWM2
The test points labeled PWM1 and PWM2 allow for external signal sources to control the TPS92518
hardware PWM dimming.
ENABLE
The test point labeled ENABLE near J10 allows for an external enable signal to control switching of
the TPS92518.
VDIGI
The VDIGI test point allows for external application of power to the MISO pull-up resistors or
monitoring of the pull-up voltage.
SW1 and SW2
The SW1 and SW2 test points provide locations to monitor the switch nodes of the two channels.
VIN
The VIN test point allows for external application of power to the digital system of the chip
independent of the analog power supplies to either channel 1 or 2. On the evaluation board this is
shorted to the analog supply by R16, so separate application of power is neither necessary nor useful
without removal of R16.
2
Performance Specifications
Table 3. TPS92518 EVM Performance Specifications
Parameter
Test Conditions
Min
Typ
Max
Units
Input Characteristics
Voltage
6.5
14
65
V
Maximum Input
Current
2.5
A
Output Characteristics
Output Voltage,
V
LED
Output/LED Voltage (absolute maximum)
0
65
V
Output/LED Voltage (practical limit)
60
Output Current,
I
LED
Output current
0
1.65
A
Default Output Current (Registers = 127/255)
0.538
Dimming Methods
Analog
LEDx_PKTH_DAC register = 0 to 255
yes
PWM
Use PWMx pin input
yes
Shunt FET
Use external FET, program LEDx_MAXOFF_DAC register as per
datasheet outline
yes
