Texas Instruments TPS22908EVM-025 Evaluation Module TPS22908EVM-025 TPS22908EVM-025 데이터 시트
제품 코드
TPS22908EVM-025
Operation
4.2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the EVM.
up, and use the EVM.
4.2.1
J1/J3 – Input Connections
This is the connection for the leads from the input source. Connect the positive lead to VIN J1, and the
negative lead connection to GND J3.
negative lead connection to GND J3.
4.2.2
J4/J6 – Output Connections
This is the connection for the output of the EVM. Connect the positive connection of the load to VOUT J4,
and the negative connection to GND J6.
and the negative connection to GND J6.
4.2.3
JP3 - ON
This is the enable input for the device. A shorting jumper must be installed on JP3 in either the High or
Low Position . The TPS22907 and TPS22908 are active High. ON must not be left floating. An external
enable source can be applied to the EVM by removing the shunt and connecting a signal to the center pin
of J3. Refer to the datasheet for proper ON and OFF voltage level settings. A switching signal may also be
used and connected at this point.
Low Position . The TPS22907 and TPS22908 are active High. ON must not be left floating. An external
enable source can be applied to the EVM by removing the shunt and connecting a signal to the center pin
of J3. Refer to the datasheet for proper ON and OFF voltage level settings. A switching signal may also be
used and connected at this point.
4.2.4
J2/J5 - VIN Sense and VOUT Sense
These two connections are used when very accurate measurements of the input or output voltage are
required. r
required. r
ON
measurements should be made using these sense connections when measuring the voltage
drop from VIN to VOUT and then calculating the resistance.
4.2.5
JP1/JP2 – Input Capacitors
During normal operation a shorting jumper is placed on JP2 and connects C2 capacitor from the input of
the device to ground. JP1 and C1 may be used to connect a user selected capacitor value from the input
of the device to ground. Refer to the Applications Section of the Datasheet for additional information on
selecting the input capacitors.
the device to ground. JP1 and C1 may be used to connect a user selected capacitor value from the input
of the device to ground. Refer to the Applications Section of the Datasheet for additional information on
selecting the input capacitors.
4.2.6
JP4/JP5 – Output Capacitors
During normal operation a shorting jumper is placed on JP4 and connects C3 capacitor from the output of
the device to ground. JP5 and C4 may be used to connect a user selected capacitor value from the output
of the device to ground. Refer to the Applications Section of the Datasheet for additional information on
selecting the output capacitors.
the device to ground. JP5 and C4 may be used to connect a user selected capacitor value from the output
of the device to ground. Refer to the Applications Section of the Datasheet for additional information on
selecting the output capacitors.
4.2.7
JP6/JP7 – Output Resistors
During normal operation no shorting jumper is placed on JP6 or JP7. A shorting jumper may be used on
JP6 to connect R1 load resistor from the output of the device to ground. JP7 may be used to connect R2
load resistor from the output to ground. R1 and R2 are sized for 1210 1/2W power rated resistors.
JP6 to connect R1 load resistor from the output of the device to ground. JP7 may be used to connect R2
load resistor from the output to ground. R1 and R2 are sized for 1210 1/2W power rated resistors.
5
Operation
Connect the positive input of the power supply to VIN at J1 and the negative lead of the power supply to
GND at J3. The input voltage range of the TPS22907EVM-025 is 1.1V to 3.6V. The input voltage range of
the TPS22908EVM-025 is 1.0V to 3.6V.
GND at J3. The input voltage range of the TPS22907EVM-025 is 1.1V to 3.6V. The input voltage range of
the TPS22908EVM-025 is 1.0V to 3.6V.
Output loads can be applied by connecting between J4 VOUT and J6 GND. The TPS22907/08EVM-025 is
rated for a maximum continuous current of 1A. Configure JP3 as required. JP3 must be installed for
proper operation. When the ON pin is asserted the TPS22907 (or TPS22908) device will control the slew
rate of VOUT. The slew rate of the device is internally controlled to avoid inrush current. When ON is de-
asserted the TPS22908 device will connect a 120
rated for a maximum continuous current of 1A. Configure JP3 as required. JP3 must be installed for
proper operation. When the ON pin is asserted the TPS22907 (or TPS22908) device will control the slew
rate of VOUT. The slew rate of the device is internally controlled to avoid inrush current. When ON is de-
asserted the TPS22908 device will connect a 120
Ω
on-chip load resistor to the output for quick discharge.
3
SLVU765 – October 2012
Using the TPS22907-08EVM-025 Single Channel Load Switch IC
Copyright © 2012, Texas Instruments Incorporated