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Part: FAN8732BG
Category:
Description: FAN8732BG - 3-Phase BLDCM + 5CH BTL Driver
Company: Fairchild Semiconductor
Datasheet: Download FAN8732BG datasheet File size : 400 kB
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Datasheet text preview:
www.fairchildsemi.com
FAN8732G/32BG
Features
Common
· · · · Built-in thermal shutdown circuit (TSD) Built-in power save circuit 4 Independent voltage sources Corresponds to 3.3V or 5V DSP
Spindle
· Output PWM mode control
BTL(Sled 2-channels)
· Output PWM mode control
BTL(Other 3-channels)
· Output LINEAR mode control
Typical Applications
· · · · · · Compact disk ROM (CD-ROM) Compact disk RW (CD-RW) Digital video disk ROM (DVD-ROM) Digital video disk RAM (DVD-RAM) Digital video disk Player (DVDP) Other compact disk media
©2003 Fairchild Semiconductor Corporation
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Description
The FAN8732G/BG is a monolithic IC suitable for a PWM 3-phase BLDC spindle motor driver, 2-CH PWM motor drivers for sled motor and 3-CH linear drivers which drive the focus actuator, tracking actuator and loading motor of the optical media applications.
42-SSOP-EP
Ordering Information
Devi ce FAN8732G FAN8732GX FAN8732BG FAN8732BGX Package 4 2 - S S OP - E P 4 2 - S S OP - E P 4 2 - S S OP - E P 4 2 - S S OP - E P Operating Temp. -20°C ~ +75°C -20°C ~ +75°C -20°C ~ +75°C -20°C ~ +75°C
X:Tape & Reel type
FAN8732G:FG1X FAN8732BG:FG3X
Rev. 1.0.0
FAN8732G/32BG
Pin Assignments
IN4
1
42
OSC
IN5 PVCC3 CS 2
2 3
41 40
MUTE IN3 PVCC1
4
39
DO5+ DO5-
5
38 37
SB DO3 -
6
PGND3
7
36
DO3 + DO1 DO1 +
CS 1 DO4+
8 9
35 34
DO4-
10 11
33
PGND1
PGND2 W
12
FAN8732G/32BG
32
SVCC
31
DO2 + DO2 -
V U
13 14
30
29
SGND IN2 IN1
CS 3 HWHW+
15
28 27
16
17
26
SPIN
HV-
18 19
25 24 23 22
VREF FG
HV+ HU-
20 21
VH PVCC2
HU+
2
FAN8732G/32BG
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Pin Name IN4 IN5 PVCC3 CS2 DO 5 + D O5 P GN D3 CS1 DO 4 + D O4 P GN D 2 W V U CS3 HW HW + HV HV + HU HU + PVCC2 VH FG V RE F SPIN IN1 IN2 S GN D D O2 DO 2 + S V CC P GN D 1 I/O I I O O O O O O O I I I I I I I O I I I I O O Pin Function Description CH4 input (typically sled1 input) CH5 input (typically sled2 input) Pow er supply for CH4 and CH5 Current sense for CH5 CH5 + drive output (typically sled2 output +) CH5 - drive output (typically sled2 output -) Pow er ground 3 Current sense for CH4 CH4 + drive output (typically sled1 output +) CH4 - drive output (typically sled1 output -) Pow er ground 2 3-phase output W for spindle 3-phase output V for spindle 3-phase output U for spindle Current sense for spindle driver Hall W(-) input Hall W(+) input Hall V(-) input Hall V(+) input Hall U(-) input Hall U(+) input Pow er supply for spindle driver Hall bias Frequency generator (FAN8732G:FG1X, FAN8732BG:FG3X) Reference voltage input Spindle torque control Channel 1 input (typically focus input) Channel 2 input (typically tracking input) Signal ground CH2 - drive output (typically tracking output +) CH2 + drive output (typically tracking output -) Pow er supply for signal block and CH1, CH2 Pow er ground 1
3
FAN8732G/32BG
Pin Definitions (Continued)
Pin Number 34 35 36 37 38 39 40 41 42 Pin Name DO1 + DO1 DO3 + DO3 SB PVCC 1 IN 3 MUTE OSC I/O O O O O I I I I Pin Function Description CH1 + drive output ((typically focus output +) CH1 - drive output (typically focus output -) CH3 + drive output (typically loading output +) CH3 - drive output (typically loading output -) Short Brake mode selection Power supply for CH3 Channel 3 input (typically loading input) All channel mute PWM carrier frequency set
4
FAN8732G/32BG
Internal Block Diagram
IN4 IN5 PVCC3 CS2
1 2 3 4 OSC
Oscillator All mute
42 41 40 39
OSC MUTE IN3 PVCC1 SB DO3DO3+ DO1DO1+ PGND1 SVCC DO2+ DO2SGND IN2 IN1
LPF
IN3
Short Brake Mode
+
4 4
38 37 36
DO5+ DO5PGND3 CS1 DO4+ DO4PGND2
5 6
Drive Logic
QR S
Gm
IOMAX
7
+
H bridge
6 6
35 34 33 32
PW M Control
LPF
OSC
-
8 PVCC3 9 10
H bri dge
Spindle power
PW M Control
OSC
+
TSD
6 6
31 30 29
11
-
Commutator & Power driver
OSC 28 27
W V U CS3
12 13 14
PW M Control
15
LPF
Reverse detector HW HW + HVHV+ HUHU+
26 25
SPIN VREF FG
17 18 19 20 21
Hall Amp
16
Frequency generator
24
Focus, Tracking, Loading block Spindle power
Bootstrap Regulator
Hall bias
23 22
VH PVCC2
5
Others parts begin by fa
FA-1 FA-2 FA-3 FA-4 FA-5 FA-6 FA-7 FA-8 FA-9 FA-10 FA-11 FA-12 FA-13 FA-14 FA-15 FA-16 FA-17
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