Datasheet

Source

Vin

Load

FAN

EXAS

NSTRUMENTS

Test Setup

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4.2 Recommended Test Setup

Figure 3. TPS51218EVM Recommended Test Setup

Figure 3 shows the recommended test setup to evaluate the TPS51218EVM. 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.

4.2.1 Configurations

1. EN J4 setting

(a) No jumper enables the controller.

(b) A jumper shorted on J4 disables the controller (default setting).

2. PWM J3 setting

(a) A jumper on pin 2 and pin 3 of J3 set the auto-skip mode (default setting).

(b) A jumper on pin 1 and pin 2 of J3 sets a forced CCM mode.

4.2.2 Input Connections

1. Prior to connecting the dc input 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 3.

2. Connect a voltmeter V1 at TP6 (Vin) and TP7 (PGND) to measure the input voltage.

3. Connect a current meter A1 to measure the input current.

4.2.3 Output Connections

1. Connect the load to J2, and set the load to constant resistance mode to sink 0 Adc before Vin is

Using the TPS51218EVM-496 High-Performance, Single Synchronous, SLVU346–January 2010

Step–Down Controller for High-Current, Eco-mode™ Applications

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