MC3479 Motorola, MC3479 Datasheet
MC3479
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MC3479 Summary of contents
Page 1
... Stepper Motor Driver The MC3479 is designed to drive a two–phase stepper motor in the bipolar mode. The circuit consists of four input sections, a logic decoding/sequencing section, two driver–stages for the motor coils, and an output to indicate the Phase A drive state. Single Supply Operation: 7.2 to 16.5 V 350 mA/Coil Drive Capability Clamp Diodes Provided for Back– ...
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... NOTES: 2. Algebraic convention rather than absolute values is used to designate limit values. 3. Current into a pin is designated as positive. Current out of a pin is designated as negative OD1,2 – V OD3,4 where: V OD1 OHD1 – V OLD2 ) or (V OHD2 – V OLD1 ), and OHD1 – V OHD2 or V OHD3 – V OHD4 . 2 MC3479 Symbol Value Unit V M ...
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... Propagation Delay (Clk–to–Phase A High) NOTES: 2. Algebraic convention rather than absolute values is used to designate limit values. 3. Current into a pin is designated as positive. Current out of a pin is designated as negative. MOTOROLA ANALOG IC DEVICE DATA MC3479 (Specifications apply over the recommended supply voltage and temperature range, [Notes Pins Symbol ...
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... Phase A General The MC3479 integrated circuit is designed to drive a stepper positioning motor in applications such as disk drives and robotics. The outputs can provide up to 350 mA to each of two coils of a two–phase motor. The outputs change state with each low–to–high transition of the clock input, with the new output state depending on the previous state, as well as the input conditions at the logic controls ...
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... Figure 6). Note the parasitic diodes (Figure 5) across each each output provide for a complete circuit path for the switched current. MOTOROLA ANALOG IC DEVICE DATA MC3479 Figure 4. Clock Timing (Refer to Figure 2) PW CLKL ...
Page 6
... L3 L4 Phase A Output 6 MC3479 outputs to the de–energized coil are in a high impedance condition — and both outputs (Figure 5) are off. When this input Logic “1” (>2.0 V), a low impedance output is provided to the de–energized coil as both outputs have off). To complete the low impedance path requires connecting described elsewhere in this data sheet ...
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... extreme cases, forced air cooling should be considered. The above calculation, and assumes that a ground plane is provided under the MC3479 (either or both sides of the PC board) to aid in the heat dissipation. Single nominal width traces leading from the four ground pins should be ...
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... Gnd Bias/Set R B MC14049UB or equivalent Figure 12. Power Reduction MC3479 6 Bias/Set MC14049UB Reduced or equivalent Power — Suggested value for 150 k . — calculation (see text) must take into account the current through Motor ...
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... T L– 0.007 (0.180 L– 0.010 (0.250 VIEW D–D MOTOROLA ANALOG IC DEVICE DATA MC3479 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 648C–03 ISSUE C –B– 0.13 (0.005 SUFFIX PLASTIC PACKAGE CASE 775– ...
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... JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 *MC3479/D* MOTOROLA ANALOG IC DEVICE DATA MC3479/D ...