Datasheet

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Configuration

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 7.

2. Connect a voltmeter V1 at TP303 (VIN) and TP304 (GND) to measure VIN input voltage.

3. Connect a current meter A1 between VIN dc source and J304.

Output Connections (For example, CPU testing)

1. Connect the load to J102, and set the load to constant resistance mode to sink 0 Adc before VIN is

applied.

2. Connect a voltmeter V2 at J101 to measure CPU 1-Vcore voltage as shown in Figure 7.

6 Configuration

All jumper selections must be made prior to applying power to the EVM. Users can configure this EVM per

the following configurations.

6.1 CPU and GPU Configuration

6.1.1 Current-Limit Trip Selection (J104 for CPU and J204 for GPU)

The current-limit trip can be set by J104 and J204 TRIPSEL.

Default setting: 7.2 A.

Table 2. Current-Limit Trip Selection

Jumper set to TRIPSEL OCP Limit, Typ. (A)

Top (1-2 pin shorted) 5VFILT 8.9

Second (3-4 pin shorted) 3.3VBIAS 7.2

Third (5-6 pin shorted) VREF 6

Bottom (7-8 pin shorted) GND 4.6

6.1.2 Frequency Selection (J103 for CPU and J203 for GPU)

The operating frequency can be set by J103 and J203 TONSEL.

Default setting: 300 kHz.

Table 3. Frequency Selection

Jumper set to TONSEL Frequency (kHz)

Top (1-2 pin shorted) 5VFILT 500

Second (3-4 pin shorted) 3.3VBIAS 400

Third (5-6 pin shorted) VREF 300

Bottom (7-8 pin shorted) GND 200

6.1.3 Overshoot Reduction Selection (J105 for CPU and J205 for GPU)

The overshoot reduction can be set by J105 and J205 OSRSEL.

Default setting: Maximum

Table 4. Overshoot Reduction Selection

Jumper set to OSR Overshoot Voltage Reduction

Top(1-2 pin shorted) 5VFILT OFF

Second (3-4 pin shorted) 3.3VBIAS Minimum

Third (5-6 pin shorted) VREF Medium

Bottom (7-8 pin shorted) GND Maximum

SLUU465–November 2010 An 8-V to 14-V Vin 2010 Atom™ E6xx— Tunnel Creek Power System

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