Fairchild Semiconductor FAN8403D3 Datasheet
FAN8403D3
3-Phase BLDC Motor Driver with PLL
www.fairchildsemi.com
Features
• 3-Phase BLDC motor drive IC with speed control
• Phase Locked Loop (PLL) speed control
• Built-in phase locked detector output
• External clock for control of motor speed
• Built-in FG amplifier and FG schmidt comparator
• Built-in integrating amplifier with phase error
• Auto Gain Control (AGC) circui t for compensation hall
amplifier
• Built-in protection circuits (over-current limit, undervoltage limit, thermal shut down)
Description
The FAN8403D3 is a monolithic integrated circuit. It is suitable for polygon mirror motor of laser beam printer (LBP).
28-SSOPH-375SG2
Typical application
• Polygon mirror motor for laser beam printer
• Polygon mirro r mot o r fo r fac s imile
• Polygon mirro r motor for duplicat or
• Polygon mirror motor for multi-function printer
• General 3 phase BLDC motor
©2002 Fairchild Semiconductor Corporation
Ordering Information
Device Package Operating Temp.
FAN8403D3 28-SSOPH-375SG2 −20°C ~ +80°C
FAN8403D3TF 28-SSOPH-375SG2 −20°C ~ +80°C
Rev.1.0.0
FAN8403D3
Pin Assignments
AGC
FG
FG
FG
OUT
S/S
NC
SGND
LD
IN-
1
2
3
S
4
5
6
7
FIN
FAN8403D3
8
28
27
26
25
24
23
22
FIN
21
H
W-
H
W+
H
U-
H
U+
H
V-
H
V+
W
V
ECLK
PD
E
E
F
V
REG
9
10
11
I
12
O
13
C
14
20
19
18
17
16
15
U
NC
R
F
PGND
PV
CC
SV
CC
2
Pin Definitions
Pin Number Pin Name Pin Function Description
1 AGC AGC Amplifier Frequency Characteristics Correction
2FG
3FG
4FG
IN-
S
OUT
5 S/S Stop And Start
6NC 7 SGND Signal Ground
8 LD Phase Locked Loop Detector Output (Open Collect)
9 ECLK External Clock
10 PD Phase Locked Loop Detector Output
11 EI Error Amplifier Inverting Input
12 EO Error Amplifier Output
13 FC Control Amplifier Frequency Correction
14 V
15 SV
16 PV
REG
CC
CC
17 PGND Power Ground
18 RF Output Current Detection
19 NC 20 U U Output
21 V V Output
22 W W Output
23 HV+ V Hall Amplifier Non Inverting Input
24 HV- V Hall Amplifier Inverting Input
25 HU+ U Hall Amplifier Non Inverting Input
26 HU- U Hall Amplifier Inverting Input
27 HW+ W Hall Amplifier Non Inverting Input
28 HW- W Hall Amplifier Inverting Input
FG Amplifier Inverting Input
FG Pulse Output
FG Amplifier Output (Open collect)
Regulator Voltage Stabilization Output
Signal V
Power V
CC
CC
FAN8403D3
3
FAN8403D3
Internal Block Diagram
AGC
FG
FG
FG
OUT
S/S
NC
SGND
LD
ECLK
IN-
1
2
-
+
3
S
4
5
6
7
+
-
V
REG
2
S/S
AGC
Hall
AMP
Matrix
28
27
26
25
24
23
22
H
W-
H
W+
H
U-
H
U+
H
V-
H
V+
W
PLL
FIN
Clock
Output
FIN
Controller
8
Lock
Detector
21
V
V-type
9
Control
20
U
V
PD
E
E
F
REG
10
11
I
12
O
13
C
14
-
+
V
REG
2
Regulator
OCL
TSD &
UVLO
19
18
17
16
15
NC
R
F
PGND
PV
CC
SV
CC
4
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