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TPIC0298 Fiches technique(PDF) 7 Page - Texas Instruments |
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TPIC0298 Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 9 page TPIC0298 DUAL FULLH DRIVER SLIS006 − D2942, JUNE 1987 − REVISED JANUARY 1990 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001 2−9 APPLICATION INFORMATION This circuit shows one half of a TPIC0298 used to provide full-H bridge drive for a 24-V, 2-A dc motor. Speed control is achieved with a TLC555 timer. This provides variable duty-cycle pulses to the EN input of the TPIC0298. In this configuration, the operating frequency is approximately 1.2 kHz. The duty cycle is adjustable from 10% to 90% to provide a wide range of motor speeds. The motor direction is determined by the logic level at the direction control input. The circuit can be enabled or disabled by the logic level at the EN input. A 5-V supply for the logic and timer circuit is provided by a TL431 shunt regulator. For circuit operation, refer to the function table. FUNCTION TABLE ENABLE DIRECTION 1Y1 1Y2 ENABLE DIRECTION CONTROL 1Y1 1Y2 H H Source Sink H L Sink Source L X Disabled Disabled X = don’t care H = high level L = low level OUT Direction Control Enable 2.7 k Ω 2.7 k Ω 2.7 k Ω VCC1 1E GND 1A1 1Y1 1Y2 1/2 TPIC0298 VCC2 1A2 24 -V Reversible DC Motor GND CONT TLC555 TRIG THR DISC RESET VDD 1N914 1 k Ω 1N914 0.1 µF 10 k Ω 1 k Ω Speed Control + 10 µF TL431 1.2 k Ω 24 V †† †† SN7401 0.01 µF 1EN 820 Ω 2.7 k Ω 2.7 k Ω † Diodes are 1N4934 or equivalent. Figure 3. TPIC0298 as Bidirectional-DC Motor Drive |
Numéro de pièce similaire - TPIC0298 |
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Description similaire - TPIC0298 |
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