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PDF FAN8420D3 Data sheet ( Hoja de datos )
| Número de pieza | FAN8420D3 | |
| Descripción | 3-Phase BLDC Motor Driver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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FAN8420D3
3-Phase BLDC Motor Driver
www.fairchildsemi.com
Features
• 3-phase, full-wave, linear BLDC motor driver
• Power save at stop mode
• Built-in current limiter
• Built-in TSD (Thermal shutdown) circuit
• Built-in 3X and 1X hall FG output
• Built-in hall bias circuit
• Built-in rotational direction detector
• Built-in reverse rotation preventer
• Built-in short braker
• Corresponds to 3.3V DSP
Description
The FAN8420D3 is a monolithic IC, suitable for a 3-phase
spindle motor driver of a CD-media system.
28-SSOPH-375SG2
Typical Applications
• Compact disk ROM (CD-ROM) spindle motor
• Compact disk RW (CD-RW) spindle motor
• Digital video disk ROM (DVD-ROM) spindle motor
• Digital video disk RAM (DVD-RAM) spindle motor
• Digital video disk Player (DVDP) spindle motor
• Other compact disk media spindle motor
• Other 3-phase BLDC motor
Ordering Information
Device
Package
Operating Temp.
FAN8420D3 28-SSOPH-375SG2 −25°C ~ +75°C
FAN8420D3TF 28-SSOPH-375SG2 −25°C ~ +75°C
©2000 Fairchild Semiconductor International
Rev. 1.0.1
Oct. 2000.
1 page  
Absolute Maximum Ratings (Ta = 25°C)
FAN8420D3
Parameter
Symbol
Value
Maximum supply voltage (Signal)
Maximum supply voltage (Motor)
Power dissipation
Maximum output current
Operating temperature range
Storage temperature range
VCCmax
VMmax
PD
IOmax
TOPR
TSTG
7
15
2.5note
1.3
−25 ~ +75
−55 ~ +150
NOTE:
1. When mounted on a 76.2mm × 114mm × 1.57mm PCB (Phenolic resin material).
2. Power dissipation reduces 16.6mW/°C for using above Ta = 25°C
3. Do not exceed PD and SOA (Safe operating area).
Power Dissipation Curve
Unit
V
V
W
A
°C
°C
Pd (mW)
3,000
2,000
1,000
SOA
0
0 25
50
75 100 125 150 175
Ambient temperature, Ta [°C]
Recommended Operating Conditions (Ta = 25°C)
Parameter
Supply voltage
Motor supply voltage
Symbol
VCC
VM
Min.
4.5
3.0
Typ.
5
12
Max.
5.5
14
Unit
V
V
Rev. 1.0.1
Oct. 2000.
5
5 Page 
FAN8420D3
H1
H2
H3
(b) Forward rotation
Therefore, the output of the rotational direction detector is low, when the spindle rotates forward, and high in the reverse rota-
tion.
6. Reverse Rotation Prevention
EC
ECR
+
−
H2+ +
H2− −
H3+ +
H3− −
DQ
CK
D-F/F
Low Active
A
Current
Sense
Amp
Gain
Controller
Driver
M
• When the output of the OR Gate, A is LOW, it steers all the output current of the current sense Amp to the Gain Controller
zero. The output current of the Driver becomes zero and the motor stops.
• As in the state of the forward rotation, the D-F/F output, Q is HIGH and the motor rotates normally. At this state, if the
control input is changed such that EC>ECR, then the motor rotates slowly by the reverse commutation in the Driver. When
the motor rotates in reverse direction, the D-F/F output becomes Low and the OR Gate output, becomes LOW. This
prevents the motor from rotating in reverse direction. The operation principle is shown in the table and the flow chart.
Rotation
Forward
Reverse
Reverse rotation preventer
H2 H3 D-F/F(Q)
EC<ECR
EC>ECR
H H→L H
Forward
-
L H→L L
- Brake and stop
Rev. 1.0.1
Oct. 2000.
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet FAN8420D3.PDF ] | |
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