Texas Instruments TPS22966-007 Evaluation Module TPS22966EVM-007 TPS22966EVM-007 데이터 시트
제품 코드
TPS22966EVM-007
Test Setup
5.5
R
ON
Test Procedure
1. Setup the EVM per
.
2. Set SOURCE1 level to 5.0V.
3. Place a shunt across JP1.
4. Connect ON1 to a DC source between 1.05v and 5.5v, SOURCE1 supply can be used for this. (When
testing R
ON
it is desired to have the switch operating in the always ON condition.)
5. Connect ON2 to GND. This keeps switch 2 in the off state.
6. Place a load on VOUT1 and VOUT2.
7. Turn on SOURCE1.
8. Record the voltage reading from METER1, record the input current reading from SOURCE1. Calculate
Ron by dividing METER1 voltage level by the current reading from SOURCE1. The result will be the
R
R
ON
value for switch 1.
9. Turn SOURCE1 off.
10. Remove ON1 from SOURCE1 and connect to GND.
11. Remove ON2 from GND and connect to SOURCE1.
12. Turn SOURCE1 on.
13. Record the voltage reading from METER2, record the input current reading from SOURCE1. Calculate
R
ON
by dividing the voltage reading of METER2 by the current reading from SOURCE1. The results will
be the R
ON
value for switch 2.
14. Turn SOURCE1 off.
5.6
t
R
, t
ON
, t
F
, t
OFF
Test Procedure
1. The rise time (t
R
) is selected by the CT capacitor value on each switch channel.
shows CT
value and the associated t
R
value. The EVM is shipped with a default CT value of 1nF.
2. Set up the EVM per
3. Set SOURCE1 level to 5.0V.
4. Place a shunt across JP1.
5. Place a load on VOUT1 and VOUT2 (a 10
Ω
, 3.25W resistor is recommended for this test).
6. Set Signal Generator output to 0-2Vpp, 10-100Hz, and 25% duty cycle.
7. Turn SOURCE1 on.
8. Enable the Signal Generator output.
9. Rise time (t
R
) and turn-on time (t
ON
) can be observed from the Oscilloscope channel 1 for switch 1 and
channel 4 for switch 2. A detailed description of t
R
, t
ON
, t
F
and t
OFF
are listed in the TPS22966 Datasheet
under the Switching Characteristics Section.
10. Turn SOURCE1 off and disable the signal Generator output.
11
SLVU757A – August 2012 – Revised March 2013
TPS22966EVM-007 Dual 6A Load Switch
Copyright © 2012–2013, Texas Instruments Incorporated