Overview
The LB1913 is a three-phase disk drive motor driver IC
that is optimal for use as a 3.5-inch floppy disk drive
spindle motor driver.
Functions and Features
Three-phase full-wave linear drive
On-chip digital speed control
Start and stop circuits (active low)
Speed switching
High: 300 rpm, Low: 360 rpm
Current limiter circuit
Index comparator circuit
Index delay circuit
Thermal protection circuit
Package Dimensions
unit: mm
3222-HSOP28
Monolithic Integrated IC
Ordering number : EN5503
83196HA (0T) No. 5503-1/6
SANYO: HSOP28
[LB1913]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
FDD Spindle Motor Driver
LB1913
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
7.0
V
Maximum output current
I
O
max1
t
0.5 s
1.0
A
Maximum steady-state output current
I
O
max2
0.7
A
Allowable power dissipation
Pd max
Independent IC
0.5
W
Operating temperature
Topr
20 to +80
C
Storage temperature
Tstg
40 to +150
C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
CC
4.2 to 6.5
V
Specifications
Absolute Maximum Ratings
at Ta = 25C
Allowable Operating Ranges
at Ta = 25C
No. 5503-2/6
LB1913
Note:
*
These items are design target values and are not tested.
A "high-level" (H) Hall amplifier input means: U
IN
+ > U
IN
V
IN
+ > V
IN
W
IN
+ > W
IN
Electrical Characteristics
at Ta = 25C, V
CC
= 5.0 V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Current drain
I
CCO
S/S = 5 V (standby mode)
10
A
I
CC
S/S = 0 V (normal mode)
12
18
mA
SL bias current
I
SL
V
SL
= 0V
10
A
SL input low-level voltage
V
SLL
0
1.0
V
SL input high-level voltage
V
SLH
3.5
V
CC
V
S/S bias current
I
S/S
180
270
A
S/S low-level voltage
V
S/SL
0
0.8
V
S/S high-level voltage
V
S/SH
3.5
V
CC
V
Hall amplifier input bias current
I
HB
10
A
Common-mode input voltage range
Vh
1.5
V
CC
1.0
V
Differential-mode input voltage range
Vdif
50
200
mVp-p
Hall bias output voltage
V
H
I
H
= 5 mA
0.8
V
Leakage current
I
HL
S/S = 5 V
10
A
Output saturation voltage
Vsat
I
O
= 0.7 A, sink + source
1.3
1.8
V
Output leakage current
I
OL
1.0
mA
Current limiter
Vlim
0.27
0.3
0.33
V
Control amplifier voltage gain
G
C
7
dB
Interphase voltage gain difference
G
C
1
dB
V/I converter source current
I+
9
14
19
A
V/I converter sink current
I
9
14
19
A
V/I converter current ratio
I+/I
0.8
1.0
1.2
DSC buffer input current
I
DSC
1.0
A
FG Schmitt hysteresis
Vsh
*
50
mV
Number of speed discriminator counts
N
1041.5
Discriminator operating frequency
F
D
*
1.1
MHz
Oscillator frequency range
F
OSC
*
1.1
MHz
Index output low-level voltage
V
IDL
I
O
= 2 mA
0.4
V
Index output leakage current
I
IDL
10
A
FG amplifier voltage gain
G
FG
*
48
dB
FG amplifier input offset
V
FGO
10
mV
FG amplifier internal reference voltage
V
FGB
2.2
2.5
2.8
V
Schmitt hysteresis
V
SH
*
50
mV
Index input hysteresis
V
ID
*
20
mV
Index common-mode input voltage range
V
ID
1.0
V
CC
1.0
V
Thermal shutdown circuit operating
TSD
*
150
180
C
temperature
Hysteresis
TSD
*
40
C
Source
Sink
Hall input
U
V
W
1
V phase
W phase
H
H
L
2
V phase
U phase
L
H
L
3
W phase
U phase
L
H
H
4
W phase
V phase
L
L
H
5
U phase
V phase
H
L
H
6
U phase
W phase
H
L
L
Truth Table
Pin Assignment
No. 5503-3/6
LB1913
Pin no.
Pin
Pin voltage
Equivalent circuit
Function
18
U
IN
+
1.5 V min
U-phase Hall element input
19
U
IN
V
CC
1.0 V max
20
V
IN
+
V-phase Hall element input
21
V
IN
22
W
IN
+
W-phase Hall element input
23
W
IN
24
HB
0.8 V typ
Minus-side pin for applying the Hall bias current
(I
H
= 5 mA)
This pin goes to the open state in the stopped state
and the Hall bias is cut off.
25
FG
IN
+
FG amplifier plus input
26
FG
IN
A reference voltage of 2.5 V is generated by the IC
internally.
27
FG
OUT
FG amplifier minus input
FG amplifier output pin
28
I+
Index input
1
I
Pin Functions
Continued on next page
No. 5503-4/6
LB1913
Pin no.
Pin
Pin voltage
Equivalent circuit
Function
2
ID
Low: 0.4 V max
Index output
High: 4.5 V min
3
CD
Connection for external RC time constant circuit.
4
SS
Low: 0.8 V max
Start/stop switching input
High: 3.5 V min
This is an active-low input.
5
SL
Low: 1.0 V max
Speed switching input
High: 3.5 V min
6
CLK
Low: 1.0 V max
Reference clock input
High:
Use a clock rate of 1 MHz for 300 and 360 rpm
V
CC
1.0 V min
speeds.
7
GND
Ground connection
Connect this pin, pin 14, and the frame to ground.
8
V
CC
Power supply
Provide a well-stabilized power supply so that ripple
and noise do not enter the LB1913 from this pin.
9
Rf
Used for output current detection.
The output current is converted to a voltage and
detected by connecting a resistor (Rf) between this
pin and V
CC
. The current limiter operates by
detecting the voltage on this pin.
Continued on next page
Continued from preceding page
No. 5503-5/6
LB1913
Pin no.
Pin
Pin voltage
Equivalent circuit
Function
10
D
O
Speed discriminator
11
F
C
Frequency characteristics correction
Current control system open loop oscillation can be
prevented by inserting a capacitor between this pin
and ground.
13
U
OUT
U-phase output
15
V
OUT
V-phase output
16
W
OUT
W-phase output
14
PGND
Output transistor ground connection
Continued from preceding page
Index Delay Pulse Timing Chart
No. 5503-6/6
LB1913
This catalog provides information as of August, 1996. Specifications and information herein are subject to
change without notice.
s
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
s
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
s
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
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