TMP816

SLVS787A – MAY 2009 – REVISED JUNE 2015

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Typical Application (continued)

8.2.1 Design Requirements

For this design example, use the following parameters:

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Input Voltage: 6 to 16 V

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VCC capacitor: 1 µF or more

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H Bridge Top side: P-channel FETs or PNP transistors

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Bottom side: N-channel FETs

8.2.2 Detailed Design Procedure

Pins:

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CPWM Capacitor: 100 pF for 25-kHz switching or appropriate.

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VTH Pin connected to Ground for full-speed or supplied with pulsed input.

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RMI Pin Pulled high to 6VREG output or external connection if required.

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ROFF pulled to 6VREG.

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6VREG connected to Hall Sensor. Hall sensor differential inputs connected to IN+ and IN-.

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SENSE pin or GND.

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

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

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Pullup on FG.

Power Supply:

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

Build the circuit with previously 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

Cycle

12

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