Texas Instruments TPS61196EVM-600, Руководство пользователя

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Introduction
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1 Introduction
TI's TPS61196EVM-600 evaluation module contains the TPS61196 integrated circuit (IC), a six-channel,
400-mA WLED driver. The TPS61196 provides a highly-integrated solution for LCD TV backlight with an
independent PWM dimming function for each channel. This EVM helps designers evaluate the operation
and performance of the TPS61196. The EVM contains one DC/DC converter as shown in
Table 1 .
Table 1. Device and Package Configurations
CONVERTER IC PACKAGE
U1 TPS61196 HTSSOP
1.1 Performance Specification Summary
The EVM is designed to operate from an input voltage source ranging from 10 V–30 V, and provides a
continuous 200-mA output current for each string. The OVP voltage is set to 60 V but can be adjusted for
the specific application.
Table 2 provides a summary of the TPS61196EVM-600 performance specifications. All specifications are
given for an ambient temperature of 25°C.
Table 2. Typical Performance Specification Summary
CONDITION MIN TYP MAX UNITS
V
IN
supply 10 30 V
I
OUT
787 mA
2 Jumper and Connector Setup
This section describes the jumpers and connectors on the EVM as well and how to properly connect, set
up and use the TPS61196EVM-600.
2.1 Input/Output Connector Description
J1 – Input: This header is the power input terminals for the converter. The terminal block provides a
power (V
IN
) and ground (GND) connection to allow the user to attach the EVM to a cable harness.
J3 – 8-pin Connector: This header provides connections to the boost converter output (V
OUT
) and the six
current feedback lines (IFBx). With a 8-pin ribbon cable, this header can be connected to six LED strings,
to facilitate evaluation.
J4 – FAULT: This header is a fault indicator to indicate abnormal conditions. When the TPS61196 is
operating normally, the voltage at the FAULT pin is low. When a fault condition happens, it is in high
impedance, which can be pulled to high level through an external resistor.
J5 – PWM Combination: This header provides flexible PWM control, PWM1–PWM6 can be controlled
together by one PWM signal or can be controlled by six independent PWM signals.
J6 – GND: This header connects to GND.
JP1, JP3 to JP7 – IFB1 to IFB6: These jumpers are used to enable IFBx channels. Shorting pin 1 and
pin 2 enables the IFBx channel and shorting pin 2 and pin 3 disables the corresponding channel.
JP2 – EN: This jumper is used to enable the device. Connecting pin1 and pin2 will toggle the EN high and
enable the device. Connecting pin2 and pin3 will toggle the EN low and disable the device.
JP8 – PWM: This jumper is used to send a high or low signal to the J5 jumper. Connecting pin1 and pin2
will send a high signal to J5. Connecting pin2 and pin3 will send a low signal to J5.
2 TPS61196EVM-600 User's Guide SLVUA25 – January 2014 – Revised February 2014
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