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PDF KA2820D Data sheet ( Hoja de datos )
| Número de pieza | KA2820D | |
| Descripción | Stepping Motor Driver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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KA2820D
Stepping Motor Driver
Features
• Built-in power save function
• Low saturation voltage
• Low power dissipation
• Input level: TTL, LSTTL, 5V CMOS compatible
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• Built-in Thermal Shutdown(TSD) circuit
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Description
The KA2820D is a monolithic integrated circuit, and suit-
able as a the two-phase stepping motor driver of a 5.25-inch
FDD system.
20-SOP-375
Typical Application
• Floppy disk drive (FDD)
• General stepping motor
Ordering Information
Device
Package
KA2820D2 20-SOP-375
Operating Temp.
−20 ~ +75°C
©2000 Fairchild Semiconductor International
1
Rev. 1.0.2
May. 2000.
1 page  
KA2820D
Application Information
1. MOTOR CONTROL LOGIC
Mode selection-truth table
Input
PS DIRX
LL
LH
HL
HH
Output
XOUT
XOUT
L H+
H+ L
L H−
H− L
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Notes:
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)
2. HOLDING AND SEEKING MODE
Seeking Mode
Open Mode
Operating Mode
H+: Operating by VS1
(VS1=12V)
H−: Operating by VS2
(VS2=5V)
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
• Peak seeking output current: 0.5A
• Continued seeking output current: 0.33A
• Holding output current: 0.2A
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet KA2820D.PDF ] | |
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