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SA1582S Datenblatt(PDF) 4 Page - Silan Microelectronics Joint-stock

Teilenummer SA1582S
Bauteilbeschribung  BIDIRECTIONAL DC MOTOR DRIVER FOR DISK TRAY MOTION
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Hersteller  SILAN [Silan Microelectronics Joint-stock]
Direct Link  http://www.silan.com.cn
Logo SILAN - Silan Microelectronics Joint-stock

SA1582S Datenblatt(HTML) 4 Page - Silan Microelectronics Joint-stock

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SA1582
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
REV:1.2
2006.06.26
Http: www.silan.com.cn
Page 4 of 8
FUNCTION DESCRIPTION
1. LOGIC INPUT & OUTPUT TABLE
Input
Output
Pin4
Pin5
Pin2
Pin8
Motor
Low
Low
*Low
*Low
Brake
High
Low
High
Low
Forward
Low
High
Low
High
Reverse
High
High
*Low
*Low
Brake
INPUT High is above 2.0V.
INPUT Low is below 0.7V.
* Low: all power TRs are off-state. But internal bias makes output voltage low state.
2. DRIVE OUTPUT CIRCUIT
V1
M
V2
PVCC
Q2
Q5
R1
R2
RL
VO1
VO2
Q3
Q6
Q1
Q4
When one input pin is “H”and another is “L”, and pin3 connect to GND with a zener diode; Vzd is the voltage
between pin3 and GND.
V1 = Vzd + 2Vbe
≅ 7.4V + 2 * 0.7V = 8.8V
V2 = Vbe + Vsat
≅ 0.2V + 0.7V = 0.9V
VO1 = V1 - VBEQ1 - VBEQ2
VO2 = VQ6SAT
VO = VO1 - VO2 = V1 - VBEQ1 - VBEQ2 - VQ6SAT
IRL = (VO1 - VO2) / RL


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