Table of Contents
PWM Capstan + Sensorless Drum
+ Loading Motor Drivers
LB11885/4
Overview
The LB11885 and LB11884 are 3-in-1 motor driver ICs for VCR units.
Functions and Features
[Capstan Motor Drive Block]
Three-phase 120 round-trip excitation direct PWM drive
PWM oscillator
Current limiter function (fixed internal and externally settable)
Forward/reverse function
Two-stage FG amplifier (built-in gain resistor)
Control amplifier output pin
[Drum Motor Drive Block]
Three-phase 120 round-trip excitation soft switching sensorless drive
Sensorless FG function
Two-stage PG amplifier function
Mixed FG and PG output function (separate output is also possible)
C_FR
+
C_HU
-
C_HU
+
C_HV
MATRIX
&
LOGIC
-
C_HV
+
C_HW
-
C_HW
V CC
62k
2k
-
C_FG IN
-
2.5k
+
+
2.5k
C_FG OUT
C_FG
680pF
OSC
C_PWM
S GND
D_FGO
Rotor position
V CC
Masking
Start up
Timing
Soft switching
Control
Control
Drive circuit
2200p
D C1
D C2
2200p
PLL
VCO
8 frequency
560k
D PC OUT
D VCO IN
0.47
D CX
0.022
-
+
+
D_CNT
200
-
0.1
D_FC
+
-
-
+
200
200
+
-
D_PG
D_PG
D_PGO1
D_PGO2
63
SANYO TV . VCR
[Loading Motor Drive Block]
H bridge forward/reverse function
Motor voltage switching function
Short-circuit braking function
Three-value input control
[Common Circuits]
Thermal protection circuit (TSD)
Package: LB11885: HSSOP48 (375mil)
LB11884: SSOP44J (275mil)
Block Diagram
C_V CC
Rising voltage protect
C_U OUT
C_V OUT
C_W OUT
C_RFP
TSD
Q
-
R
C_RFS
V CC
+
S
C_CNT
+
-
C_LIM
C_MGND
Rising voltage protect
C_FC
D_V CC
D_COM
Detect
D_U OUT
D_V OUT
D_W OUT
0.022 F
TSD
D_RF
1k
0.5
Upper side non saturatc circuit
D_MGND
L_V CC
Rising voltage protect
L_GND
L_OUT1
L_OUT2
L_IN
L_VREI
Package Dimensions
Package Dimensions
SIP/DIP/SQFP/QIP
SIP/DIP/SQFP/QIP
SIP7H
SIP7H
18.0
3.0
3.4
1
1
7
1.38
2.54
0.6
1.0
0.6
1.2
DIP24S(300mil)
DIP30SD(400mil)
DIP24S(300mil)
DIP30SD(400mil)
21.0
24
13
30
1
12
1
0.9
(0.71)
1.78
0.48
0.95
(1.04)
1.78
DIP42S(600mil)
DIP54S(600mil)
DIP42S(600mil)
DIP54S(600mil)
37.7
42
22
54
1
1
21
0.95
1.78
(0.65)
1.78
0.48
(1.05)
SQFP64(10 10)
SQFP144(20 20)
SQFP64(10 10)
SQFP144(20 20)
12.0
10.0
108
48
33
109
49
32
64
17
1
16
144
(0.5)
0.15
0.18
(1.25)
1
(1.25)
(Reference Drawing)
SIP10H
SIP10HD
SIP10H
SIP10HD
25.6
4.0
26.8
C 0.7
(10.0)
3.4
20.0
1
10
(1.37)
2.54
0.5
(1.97)
1.4
0.5
2.54
0.4
2.0
DIP36S(400mil)
DIP36S(400mil)
27.0
32.4
16
36
1
15
0.95
0.95
0.48
1.78
0.48
(1.1)
SQFP48(7 7)
SQFP48(7 7)
9.0
7.0
47.58
36
25
28
37
24
27
48
13
1.05
1
12
(0.5)
0.18
(0.75)
0.48
QIP48E(14 14)
QIP48E(14 14)
17.2
22.0
20.0
14.0
73
36
25
72
37
48
37
1
12
1.0
0.35
36
0.145
(1.5)
0.5
0.2
(unit:mm)
( 2.0)
2.4
10
1.15
0.4
1.2
19
18
0.15
24
13
0.15
64
SANYO TV . VCR
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