Moteur de recherche de fiches techniques de composants électroniques |
|
STK672-520 Fiches technique(PDF) 6 Page - Sanyo Semicon Device |
|
STK672-520 Fiches technique(HTML) 6 Page - Sanyo Semicon Device |
6 / 23 page STK672-520 No. A1179-6/23 • Motor current peak value IOH setting • When RO2 is open IOH= [Vref×1k/(1k+3.9k)] ÷Rs= (Vref÷4.9) ÷Rs The values 1k and 3.9k represent internal driver resistance values, while Rs represents the internal driver current detection resistance. Vref= (4.9k ÷ (4.9k+RO1)) ×5V (or 3.3V) =IOH×4.9×Rs The value 4.9k represents the series resistance value of the internal driver values of 1k and 3.9k. • If RO2 is connected IOH= [Vref×1k/ (1k+3.9k)] ÷Rs= (Vref÷4.9) ÷Rs The values 1k and 3.9k represent the internal driver resistance values, while Rs represents the internal driver current detection resistance. Vref= (R0x ÷ (RO1+R0x)) ×5V (or 3.3V) =IOH×4.9×Rs = [(4.9k ×RO2) ÷ ((4.9k×RO2) +RO1× (4.9k+RO2))] ×5V(or 3.3V) R0x= (4.9k ×RO2) ÷ (4.9k+RO2) Rs represents the current detection resistance inside the HIC, while the value 4.9k in the formula above represents the internal resistance value of the Vref pin. Rs=0.33 Ω when using the STK672-520 Rs=0.165 Ω when using the STK672-530 Rs=0.11 Ω when using the STK672-540 [Smoke Emission Precuations] If any of the output pins 2, 3, 4, and 5 is held open, the electrical stress onto the driver due to the inductive energy accumulated in the motor could cause short-circuit followed by permanent damage to the internal MOSFET. As a result, the STK672-520 may give rise to emit smoke. Input Pin Functions Pin Name Pin No. Function Input Conditions When Operating CLOCK 9 Reference clock for motor phase current switching Operates on the rising edge of the signal MODE 8 Excitation mode selection Low: 2-phase excitation High: 1-2 phase excitation CWB 10 Motor direction switching Low: CW (forward) High: CCW (reverse) RESETB 11 System reset and A, AB, B, and BB outputs cutoff. Applications must apply a reset signal for at least 10 μs when VDD is first applied. A reset is applied by a low level ENABLE 12 The A, AB, B, and BB outputs are turned off, and after operation is restored by returning the ENABLE pin to the high level, operation continues with the same excitation timing as before the low-level input. The A, AB, B, and BB outputs are turned off by a low- level input. (1) A simple reset function is formed from D1, CO2, RO3, and RO4 in this application circuit. With the CLOCK input held low, when the 5V supply voltage is brought up a reset is applied if the motor output phases A and BB are driven. If the 5V supply voltage rise time is slow (over 50ms), the motor output phases A and BB may not be driven. Increase the value of the capacitor CO2 and check circuit operation again. (2) See the timing chart for the concrete details on circuit operation. IOH 0 |
Numéro de pièce similaire - STK672-520 |
|
Description similaire - STK672-520 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |