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PDF KA2820D2 Data sheet ( Hoja de datos )
| Número de pieza | KA2820D2 | |
| Descripción | Stepping Motor Driver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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FDD PRODUCTS
STEPPING MOTOR DRIVER
The KA2820D2 is a monolithic integrated circuit, and
suitable as a the two-phase stepping motor driver of
a 5.25” FDD system.
20-SOP-375
KA2820D2
FEATURES
www.DataSh•eet4UB.ucoilmt-in power save function
• Low saturation voltage
• Low power dissipation
• Input level: TTL, LSTTL, 5V CMOS compatible
• Standard MPU direct interface
• Built-in TSD circuit
ORDERING INFORMATION
Device
KA2820D2
Package Operating Temperature
20-SOP-375
−20 ~ +75°C
BLOCK DIAGRAM
VS2A
DIRA
VCC
GND
TTL
Interface
VS2B
DIRB
PS
TTL
Interface
TSD
VS1A
AOUT
AOUT
GND
VS1B
BOUT
BOUT
GND
© 1999 Fairchild Semiconductor Corporation
MIC-98D002
August 1998
Rev. B
1
1 page  
FDD PRODUCTS
KA2820D2
APPLICATION INFORMATION
1. MOTOR CONTROL LOGIC
Mode selection-truth table
PS
L
L
www.DataSheet4U.com
H
H
Input
DIRX
L
H
L
H
Output
XOUT
XOUT
L H+
H+ L
L H−
H− L
NOTE:
DIRX: DIRA or DIRB (Direction input)
XOUT: AOUT or BOUT (Non-inverting output)
XOUT: AOUT or BOUT (Inverting output)
X: Indicate each channel (A and B)
Seeking Mode
Open Mode
Operating Mode
H+: Operating by VS1
(VS1=12V)
H−: Operating by VS2
(VS2=5V)
2. HOLDING AND SEEKING MODE
In rotating high speed (Seeking Mode), stepping motor is operated by high voltage (VS1: Seeking power supply
voltage “12”).
In holding mode, stepping motor is operated by low voltage (VS2: Holding power supply voltage “5”).
When the PS input signal is high, it will be minimized power consumptio in this device.
3. MAXIMUM DRIVE CURRENT CAPACITY AS FOLLOWS
• Peak seeking output current: 0.5A
• Continued seeking output current: 0.33A
• Holding output current: 0.2A
MIC-98D002
August 1998
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet KA2820D2.PDF ] | |
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