TMP815

SLDS153B – MAY 2009 – REVISED NOVEMBER 2015

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Typical Application (continued)

8.2.2 Detailed Design Procedure

Pins:

•

CPWM Capacitor: 220 pF for 30-kHz switching or appropriate.

•

VTH Pin connected to Ground for Full speed or supplied with pulsed input

•

RMI Pin Pulled high to 5VREG output or external connection if required

•

5VREG connected to Hall Sensor. Hall sensor differential inputs connected to IN+ and IN-

•

Current sense resistor connected to SENSE pin or GND.

•

CT connected to Lock Detection capacitor (0.47 uF or calculated values) or to GND

•

Drive outputs connected to the Gates of the H bridge switches.

•

Pull up on FG.

Power Supply:

•

Make sure the power supply has set with sufficient current limit at the decided at the motor voltage.

Build the circuit with the recommended connections at the pins.

Test the motor circuit with hardware connected to it.

8.2.3 Application Curves

Figure 7. Motor Outputs and Phase Current at 100% Duty

Figure 6. Start-up at 12 V (Soft Start)

Cycle

12

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