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User's Guide
SLVUAB9A–October 2014–Revised November 2014
TPS92638EVM User's Guide
1 Introduction
The TPS92638-Q1 evaluation module is designed to evaluate the TPS92638-Q1 integrated circuit (IC) in a
typical LED application. This user's guide provides descriptions for the connectors and test points as well
as the schematic, bill of materials, and PCB layout of the evaluation module (EVM).
For features and a description of the TPS92638-Q1 device, see the device data sheet, SLVSCK5.
2 Connector and Test Point Descriptions
Table 1. Connectors
CONNECTOR NAME DESCRIPTION
CN1 VBAT This connector is the positive input supply voltage.
This connector is the positive STOP input power supply. When a high level is on the
CN2 STOP connector, the current on the load is determined by 200 × V
REF
/ (R12 // R13). When the level
on the CN2 connector is low, the current on the load is determined by 200 × V
REF
/ R13.
The CN3 connector is TPS92638-Q1 EVM ground. This connector is the return connection to
CN3 GND
the input power supply.
CN4 EN
This connector is the enable pin input for device enable and shutdown.
CN5 PWM1 This connector is the PWM1 input for channel 1 and channel 2.
CN6 PWM2 This connector is the PWM2 input for channel 3 and channel 4.
CN7 PWM3 This connector is the PWM3 input for channel 5 and channel 6.
CN8 PWM4 This connector is the PWM4 input for channel 7 and channel 8.
This connector is the I/O pin. The FAULT status output of the LED driver when an open-load
condition, LED short GND, LED short battery, thermal shutdown, reference resistor short is
CN9 FAULT
detected. This pin can also be pulled high depend on the behavior required by the application.
For additional detail, see the fault table in the TPS92638-Q1 data sheet.
This connector is the input that supplies the voltage source to potentiometer R9. The voltage
CN10 TEMP_IN is divided by the potentiometer R9 which is then sent to the TEMP pin which is used to set the
thermal foldback threshold. See Section 3.4 for additional information.
1
SLVUAB9A–October 2014–Revised November 2014 TPS92638EVM User's Guide
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