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PDF L7203 Data sheet ( Hoja de datos )

Número de pieza L7203
Descripción SMOOTH DRIVE SPINDLE MOTOR FOR OPTICAL DRIVE APPLICATION WITH POWER INTEGRATED
Fabricantes STMicroelectronics　
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No Preview Available ! L7203 Hoja de datos, Descripción, Manual

® L7203
SMOOTH DRIVE SPINDLE MOTOR FOR OPTICAL DRIVE
APPLICATION WITH POWER INTEGRATED
SMOOTH DRIVE™ SYSTEM
1.8A DRIVE PEAK CAPABILITY
SLEW RATE CONTROL
INDUCTIVE SENSE START-UP ROUTINE
THERMAL SHUTDOWN
SUITABLE FOR 5V AND 12V APPLICATION
ONLY ONE HALL SENSOR IS REQUIRED
DESCRIPTION
The L7203 SPINDLE MOTOR IC includes a three
phase brushless spindle motor controller and the
power stage in switching mode. The device is de-
signed for both 5V and 12V OPTICAL DRIVE ap-
plication requiring up to 1.8A peak of current.
The device is realized in BCD5, a 0.7 µm Mixed
technology.
The spindle motor position detection is carried
out by means of a single comparator with hyster-
esis. In the start-up phase the "inductive sense
BLOCK DIAGRAM
SO20
SSO24
ORDERING NUMBERS: L7203 (SO20)
L7203S (SSO24)
start up method" is used to detect the rotor posi-
tion, determining the direction of starting rotation.
This procedure is implemented by a logic circuit
on chip.
The device applies three sinusoidal voltages to
the motor coils.
This is obtained through the application of the
April 2001
PRS
LOW VOLTAGE
DETECTOR
SRC
AGND
DGND
1/13

1 page




L7203 pdf
L7203
DC ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
BIAS
VBIAS
BIAS Output Voltage
IBmax
Max Output Current
H+, H-
VH± H+ H- Input Voltage Range
IH± Input Leakage Current
VOFFISR Comparator Offset
VHy Comparator Hysteresys
MOTOR POWER STAGE
RDSON
High and Low side FET on
Resistance
IU/V/W
Spindle Output Leakage
Current
CURRENT LIMITER
VLim Internal Reference Voltage for
current limitation
VOFFLim Comparator Offset
THERMAL PROTECTION
TS Shutdown temperature
UNDERVOLTAGE
Vccth (fall) Undervoltage threshold (fall)
Vccth (rise) Undervoltage threshold (rise)
Vccth (hys) Undervoltage threshold (hys)
SYSTEM FREQUENCY
fsys System frequency
SLEW RATE CONTROL
VSRC
SRC Output Voltage
ISRC Output Current
RSRC
ISR
External Resistor on pin SRC
VISR Input Range
Test Condition
VCC = 5V; 5mA < I < 15mA
Vin = 0, +VCC
Tj = 125; VM = 4.25V
I = 1.2A
VM = 15V
PRS = 0
PRS = 1
Min. Typ.
3.25
0
-10
-15
4
220 240
-15
130
2.9 -
--
- 0.1
10
20
1.25
10
0
Note 1: An SMBJIZAVCL-TR is recommended to clamp VM in case of high impedance on power supply line.
Max.
3.75
15
2.5
+10
+15
15
2
100
260
+15
170
-
3.4
-
20
34
500
2
Unit
V
mA
V
µA
mV
mV
Ω
µA
mV
mV
°C
V
V
V
MHz
MHz
V
µA
KΩ
V
FUNCTIONAL DESCRIPTION
STB-Thermal protection
Controller drive STB pin by open drain.
When Thermal Shutdown is excited, the device
force this pin LOW.
Controller will manage STB to do a re-start.
When STB is LOW all the drivers are shut off.
Hall Sensor Bias
A regulator on chip supply a 3.3V+-10% refer-
ence on pin Bias. This regulator can supply an
output current up-to 15 mA.
Figure 1.
R PULL UP
STB
OVER TEMP
D98IN880
5/13

5 Page





L7203 arduino
DIM.
MIN.
mm
TYP. MAX. MIN.
inch
TYP. MAX.
A 2.35
2.65 0.093
0.104
A1 0.1
0.3 0.004
0.012
B 0.33
0.51 0.013
0.020
C 0.23
0.32 0.009
0.013
D 12.6
13 0.496
0.512
E 7.4
7.6 0.291
0.299
e 1.27
0.050
H 10
10.65 0.394
0.419
h 0.25
0.75 0.010
0.030
L 0.4
1.27 0.016
0.050
K 0˚ (min.)8˚ (max.)
L7203
OUTLINE AND
MECHANICAL DATA
SO20
B
20
1
e
D
L
A
K
h x 45˚
A1
H
C
11
10
E
SO20MEC
11/13

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