Datasheet

FAN
V1
+
_
DC Source
VIN
_
+
DC Source
V5IN
+
_
+
TPS51219 EVM-630
J6
TP7
VIN_GND
V5IN_GND
JP1
J1: V5IN J2: V5IN_GND
GSNS VSNS
TP10
PGOOD
J4
SW1
OFF
ON
TP9
VIN
SW
V5IN
TP12 TP11
A2
A1
_
V2
+
_
V3
+
_
J12 J13
TP3
JP2
Electronic
Load
ILOAD
TP5TP6
GND
Oscilloscope
TP8
GND
TP15
VCCIO
TP16
VCCIO_GND
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Test Setup
4.2 Recommended Test Setup
Figure 4. TPS51219EVM-630 Recommended Test Setup
Figure 4 is the recommended test setup to evaluate the TPS51219EVM. Working at an ESD workstation,
ensure that any wrist straps, bootstraps, or mats are connected referencing the user to earth ground
before power is applied to the EVM.
Input Connections:
1. Prior to connecting the DC source VIN, it is advisable to limit the source current from VIN to 10 A
maximum. Ensure that VIN is initially set to 0 V and connected as shown in Figure 4.
2. Prior to connecting the DC source V5IN, it is advisable to limit the source current from V5IN to 1 A
maximum. Ensure that V5IN is initially set to 0 V and connected as shown in Figure 4.
3. Connect a voltmeter V1 at TP11 (VIN) and TP12 (VIN_GND) to measure VIN voltage, V2 at TP9
(V5IN) and TP10 (V5IN_GND) to measure V5IN voltage as shown in Figure 4.
4. Connect a current meter A1 between DC source VIN and J4 to measure the input current.
5. Connect a voltmeter V2 between DC source V5IN and J1 to measure the 5-V input current.
Output Connections:
1. Connect the load to J12 and J13, and set load to constant resistance mode to sink 0-Adc before VIN
and V5IN are applied.
2. Connect a voltmeter V3 at J6-2 (VSNS) and J6-1 (GSNS) to measure the output voltage.
Other Connections:
Place a fan as shown in Figure 4 and turn it on, ensuring that air is flowing across the EVM.
7
SLUU818April 2012 Using the TPS51219EVM-630 High-Performance, Single, Synchronous,
Step-Down Controller for Notebook Power Supply
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