Texas Instruments TPS65165 Evaluation Module TPS65165EVM-233 TPS65165EVM-233 Datenbogen
Produktcode
TPS65165EVM-233
www.ti.com
1.2
Modifications
1.2.1
Customizing the Power Supply
1.2.2
Input to Output Isolation
2
Setup and Test Results
2.1
Connections and Jumpers
Setup and Test Results
The primary goal of this EVM is to facilitate user evaluation of the TPS65165 in a power-supply application
for a typical large TFT display. To facilitate user customization of the EVM, the board was designed with
devices having 603 or larger footprints. A production-optimized implementation would likely occupy less
total board space.
for a typical large TFT display. To facilitate user customization of the EVM, the board was designed with
devices having 603 or larger footprints. A production-optimized implementation would likely occupy less
total board space.
The user can change each rail’s regulated output voltage by changing the appropriate feedback resistors
per the device data sheet (
per the device data sheet (
). The user is responsible for not exceeding each output’s maximum
voltage specifications. In addition, alternate capacitors, inductors and/or diodes can be used. When using
alternate capacitors, ensure that at least the minimum recommended capacitance per the data sheet is
used, and that the capacitor voltage rating is appropriate for the application. The switching converters are
designed to be used with ceramic output capacitors. Using non-ceramic output capacitors with significantly
large equivalent series resistances (ESR) can result in larger output ripple or unstable operation of the
inductive switching converters. Each charge pump's flying and output capacitors must be ceramic
capacitors. When selecting an alternate inductor, use the datasheet design equations to ensure that an
appropriate inductance value is selected, and that the inductor current rating is appropriate for the desired
output current. Using an inductor with larger dc resistance will result in lower efficiency. When using
alternate diodes, ensure that the diode is rated for both the expected peak current and expected power
per the datasheet design equations.
alternate capacitors, ensure that at least the minimum recommended capacitance per the data sheet is
used, and that the capacitor voltage rating is appropriate for the application. The switching converters are
designed to be used with ceramic output capacitors. Using non-ceramic output capacitors with significantly
large equivalent series resistances (ESR) can result in larger output ripple or unstable operation of the
inductive switching converters. Each charge pump's flying and output capacitors must be ceramic
capacitors. When selecting an alternate inductor, use the datasheet design equations to ensure that an
appropriate inductance value is selected, and that the inductor current rating is appropriate for the desired
output current. Using an inductor with larger dc resistance will result in lower efficiency. When using
alternate diodes, ensure that the diode is rated for both the expected peak current and expected power
per the datasheet design equations.
The user can change the soft-start time of Vs (boost converter), VGL (negative charge pump), VGH
(positive charge pump) by changing the value of C15 on the ADLY pin and C14 on the GDLY pin,
respectively. When the EN pin goes high, Vs and VGL start up after a delay time set by C15 on the ADLY
pin. C14 on the GDLY pin sets the startup delay time until VGH goes active with CTRL=high.
(positive charge pump) by changing the value of C15 on the ADLY pin and C14 on the GDLY pin,
respectively. When the EN pin goes high, Vs and VGL start up after a delay time set by C15 on the ADLY
pin. C14 on the GDLY pin sets the startup delay time until VGH goes active with CTRL=high.
The non-synchronous boost converter has a path from input to output, i.e VIN to Vs, through external
switching diode D1. Therefore, even though EN is low, the Vs terminal has a voltage equal to VIN-V
switching diode D1. Therefore, even though EN is low, the Vs terminal has a voltage equal to VIN-V
f
where V
f
is the diode forward voltage.
This chapter explains the input, output and jumper connections of the TPS65165EVM-233. It also
describes how to set up test equipment for evaluating the EVM, and provides test results.
describes how to set up test equipment for evaluating the EVM, and provides test results.
The DEFAULT jumper settings are required for the EVM to operate within the specifications of
.
Table 2. Default Jumper Settings
Jumper
Default Setting
JP1 – EN
GND
JP2 – HVS
GND
JP3 – CTRL
VIN
JP4 – DRN
GND
JP5 – POS3
GND
JP6 – POS2
GND
JP7 – NEG2
OUT2
JP8 – NEG1
OUT1
JP9 – POS1
GND
TPS65165EVM-233
2
SLVU203 – March 2007