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Part: FAN8728
Category:
Description: BLDC + 4CH BTL Driver
Company: Fairchild Semiconductor
Datasheet: Download FAN8728 datasheet File size : 400 kB
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FAN8728
Spindle + 4-CH Input PWM Motor Drive IC
Features
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Description
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5/!&5/!0/.6/60 "7"48-QFPH-1414
Typical Applications
&"4
7 ."4
7 &"4
7 07"
Ordering Information
Device FAN8728 Package 48-QFPH-1414 Operating Temp -5°C ~ 8°C
Rev. 1.0.0
©2002 Fairchild Semiconductor Corporation
FAN8728
Pin Assignments
48 2 1
47
46
45
44
43
42
41
40
39
38
37 36
35 34 33 32 31
3
4
5
6
7 8 30 29 9 28
10
27
11
26
12 13 14 15 16
17 18 19 20 21 22 23 24
25
2
FAN8728
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 H 1+ H1H 2+ H2H 3+ H3FG DIR SVCC1 VM1 CS1 PGND1 A3 A2 A1 SGND IN 3+ IN3OUT3 IN 2+ IN2OUT2 VM2 IN 2+ IN2OUT2 DO1+ DO1DO2+ DO2PGND2 DO3+ DO3I/O I I I I I I O O I O O O I I O I I O I I O O O O O O O Hall1(+) Input Hall1(-) Input Hall2(+) Input Hall2(-) Input Hall3(+) Input Hall3(-) Input FG Output Direction SIGNAL VCC1 Motor Power Supply Current Sensor Power Ground 3-Phase Output 3 3-Phase Output 2 3-Phase Output 1 Signal Ground Op-amp CH3 Input(+) Op-amp CH3 Input(-) Op-amp CH3 Output Op-amp CH2 Input(+) Op-amp CH2 Input(-) Op-amp CH2 Output BTL CH1,2 Supply Voltage Op-amp CH2 Input(+) Op-amp CH2 Input(-) Op-amp CH2 Output BTL Drive 1 Output(+) BTL Drive 1 Output(-) BTL Drive 2 Output(+) BTL Drive 2 Output(-) BTL Power Gnd BTL Drive 3 Output(+) BTL Drive 3 Output(-) Pin Function Descrition
3
FAN8728
Pin Definitions (Continued)
Pin Number 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name DO4+ DO4IN4 VREF4 VM4 VM3 SVCC2 VREF123 MUTE123 MUTE4 SS OUTS INSINS+ PC1 I/O O O I I I I I I O I I I Pin Function Descrition BTL Drive 4 Output(+) BTL Drive 4 Output(-) BTL CH4 Input BTL CH4 Reference BTL CH4 Motor Supply BTL CH3 Motor Supply BTL Signal VCC BTL CH1,2,3 Rference BTL CH1,2,3 Mute BTL CH4 Mute Spindle Start/Stop Opamp Spindle Output Opamp Spindle Input(-) Opamp Spindle Input(+) Phase Compesation Cap.
4
FAN8728
Internal Block Diagram
MUTE4 (LOADING)
FIN(GND)
MUTE123
VREF123
SVCC2
INS+
INS-
48
47
46
45
44
43
2 4
41
40
39
38
H1+ H1H2+ H2H3+ H3-
VREF4
37
OUTS
PC1
SS
VM3
VM4
1
36
IN4 DO4DO4+ DO3DO3+ PGND2
2
35
Hall Amp
3
34
4
Absolute Values
V M 1 CS1 Current Sense Amp
VM4
33
5
32
6
Output Current Limit
VM3
31
FG1X Generator
Detection FIN(GND) Logic Reverse Rotation
VM2
0 3
FIN(GND)
FG DIR SVCC1 VM1 CS1 PGND1
8
7
DO2DO2+ DO1DO1+
29
9
28
Distributor
10
VM2
27
11
26
OUT1 IN1-
12
25
Driver
13 14 15 16 17 18 9 1 20 21 22 23 24
SGND
A3
A2
A1
FIN(GND)
OUT2
IN3+
IN2+
IN3-
OUT3
VM2
IN2-
IN1+
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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