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GS-D200 Datenblatt(PDF) 11 Page - STMicroelectronics |
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GS-D200 Datenblatt(HTML) 11 Page - STMicroelectronics |
11 / 17 page 11/17 USER NOTES Supply Voltage The recommended operating maximum supply voltage must include the ripple voltage for the Vs rail, and a 5V ±5% for the Vss line is required. The two supply voltages must to be correctly se- quenced to avoid any possible erroneous position- ing of the power stages. The correct power-up and power-down sequences are: Power-up 1) Vss (5V) is applied with Enable = Low 2) Vs (the motor supply voltage) is applied 3) Enable is brougth High Power-down 1) Enable is brougth Low 2) Vs is switched off 3) Vss is switched off. Case Grounding The module case is internally connected to pin 1 and 13. To obtain additional effective EMI shield, the PCB area below the module can be used as an effective sixth side shield. Thermal Characteristics The case-to-ambient thermal resistance of the GS- D modules is 5 °C/W. This produces a 50°C tem- perature increase of the module surface for 10W of internal dissipation. According to ambient temperature and/or to power dissipation, an additional heatsink or forced venti- lation may be required. (See derating curves). Supply Line Impedance The module has an internal capacitor connected accross the supply pins (18 and 13) to assure the circuit stability. This capacitor cannot handle high values of current ripple, and would be permanently damaged if the primary energy source impedance is not adequate. The use of a low ESR, high ripple current 470 µF capacitor located as close to the module as possi- ble is recommended. Suitable units are the SPRA- GUE type 672D, the SPRAGUE 678D, the RIFA type PEG 126 or any equivalent unit. When space is a limitation, a 22 µF ceramic multilayer capacitor connected across the module input pins must be used. Module Protections The GS-D200 outputs are protected against occa- sional and permanent short-circuits of the output pin to the supply voltage. The GS-D200S outputs are also protected against short circuits to ground and to another output. When the current exceeds the maximum value, the output is automatically disabled. The GS-D200S protection is of the latching type, i.e. when an overload condition is detected the unit outputs are disabled. To restart the opera- tions it is necessary to disable the unit (pin 11=Low) or to switch off the supply voltage for at least 100ms. Motor Connection The motor is normally quite far from the module and long cables are needed for connection. The use of a twisted pair cable with appropriate cross section for each motor phase is recommended to minimize DC losses and RFI problems. Unused Inputs All the GS-D200 and GS-D200S logic inputs have an internal pull-up, and they are high when uncon- nected. Phase Current Programming The output current of the GS-D200 is factory set to 1A while the GS-D200S has a standard 2A value. The phase current value can be changed by con- necting an appropriate resistor between pin 9 and ground or Vss (see fig. 14). In the first case the phase current will decrease, in the latter it will increase. The maximum phase current must be limited to 2A for the GS-D200 and 2.5A for the GS-D200S to avoid permanent damage to the module. GS-D200 phase current programming: I >1A Ri = 10 − I 0.993 ⋅ I − 1 = kΩ Ri ≥ 8.2kΩ I <1A Rd = I 1 − 0.993 ⋅ I = kΩ GS-D200S phase current programming: I >2A Ri = 10 − 0.33 ⋅ I 0.473 ⋅ I − 1 = kΩ Ri ≥ 50 kΩ I <2A Rd = I 3.03 − 1.43 ⋅ I = kΩ GS-D200/GS-D200S |
Ähnliche Teilenummer - GS-D200 |
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Ähnliche Beschreibung - GS-D200 |
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