Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
ML4411 Datasheet(PDF) 9 Page - Micro Linear Corporation |
|
ML4411 Datasheet(HTML) 9 Page - Micro Linear Corporation |
9 / 14 page 9 ML4411/ML4411A BRAKING As shown in figure 9, the braking circuit pulls the N- Channel MOSFET gates high when BRAKE falls below a 1.4V threshold. After a power failure, CDLY is discharged slowly through RDLY providing a delay for retract to occur before the braking circuit is activated. The N-Channel buffer (B1) tri-states when the BRAKE pin reaches 2.1V to ensure that no charge from CBRK is lost through the pull- down transistor in B1. To brake the motor with external signals, first disable power by pulling pin 8 low, then pull pin 26 below 1.4V using an open drain (or diode isolated) output. The bias current for the Braking circuits comes from VCC2. When the N-Channel MOSFETs turn on, no additional power is generated for VCC2 (motor back-EMF rectified through out the MOSFET body diodes). After VCC2 drops below 4V, Q2 turns off. Continued braking relies on the CGS of the N-Channel MOSFETs to sustain the MOSFET gate enhancement voltage. 0 0.01 0.02 0.03 0.04 0.05 60 50 40 30 20 10 0 COS Figure 8. ILIMIT Output Off-Time vs. COS. P3 ONLY – + VCC2 – 3V COMM. LOGIC 26 8 27 28 12 RDLY BRAKE CDLY 1.4V – + A4 A6 VCC2 DIS PWR COMMUTATION LOGIC UVLO ILIMIT ICMD ISENSE – + A3 – + A2 A1 AV = 5 Q ONE SHOT Q2 VCC VCC2 7 P1 . . . P3 N1 . . . N3 RSENSE VIN 13 6 COS COTA CBRK B1 VCC 2.1V – + A5 VCC2 DIS PWR VCC2 16K POWER FAIL 4.5K 17 +5 UVLO Q1 1K TRI- ST. Figure 9. Current Control, Output Drive and Braking Circuits. |
Número de pieza similar - ML4411 |
|
Descripción similar - ML4411 |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes 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 |