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PDF L6246 Data sheet ( Hoja de datos )
| Número de pieza | L6246 | |
| Descripción | 12V VOICE COIL MOTOR DRIVER | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L6246 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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L6246
12V VOICE COIL MOTOR DRIVER
12V (±10%) OPERATION
3A MAXIMUM CURRENT CAPABILITY
0.3Ω MAXIMUM ON RESISTANCE OF EACH
POWER DMOS AT A JUNCTION TEM-
PERATAURE OF 25°C
CLASS AB POWER AMPLIFIERS
LOGIC AND POWER SUPPLY MONITOR
POWER ON RESET
PARKING FUNCTION WITH SELECTABLE
RETRACT VOLTAGE AND DYNAMIC BRAKE
BEFORE PARKING
ENABLE FUNCTION
GATE DRIVER FOR EXTERNAL BLOCKING
N-MOSFET
OVERTEMPERATURE PROTECTION
OVERTEMPERATURE WARNING OUTPUT
PQFP44 PACKAGE
MULTIPOWER BCD TECHNOLOGY
PQFP44 (10x10)
DESCRIPTION
The voice coil driver L6246 is a linear power am-
plifier designed to drive single phase bipolar DC
motors for hard disk drive applications. The de-
vice contains a selectable transconductance loop,
which allows high precision for head positioning.
The power stage is composed of 2 power amplifi-
ers, in AB class, with 4 DMOSs, with Rdson of
0.5Ω (Sink+Source) maximum, in a H-bridge con-
figuration. Drive voltage for the upper DMOS
FETs is provided by a charge pump circuit to en-
sure low Rdson.
Automatic brake and parking of the head actuator
is performed by logic or when a failure condition
is detected by power supply monitors. An external
resistor programs the parking voltage that en-
ables the head retract. In addition, a 5V stable
output is provided for the external usage, and a
gate driver circuit enables an external power sup-
ply isolation N-MOSFET.
This device is built in BCD II technology allowing
dense digital circuitry to be combined with high
power bipolar power devices and is assembled in
PQFP44.
February 1998
1/12
1 page  
L6246
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
VCC_POR_T_R Logic supply POR thereshold
Resistance
10
I_POR_O POR output current drive
4
LOGIC INTERFACE VOLTAGE LEVEL (All digital inputs are CMOS compatible)
Voh CMOS high level output voltage Iout = 1.0mA
4.10
Vol CMOS low level output voltage Iout = 1.0mA
Vih TTL high level input voltage
2
Vil TTL low level input voltage
5V REFERENCE GENERATOR
Vref Voltage reference at Power On
4.75
Drift Drift from Power On
-2
loref
Current output
10
INPUT AMPLIFIER
Vi Input voltage range
Vref (-)
Vcm
Input common mode voltage
range
0
Vds Input differential voltage swing
-5
Vos Input offset voltage
-5
Ib Input Bias current
-500
Gv Open Loop voltage Gain
80
SR Output slew rate
0.6
GBW Gain bandwidth product
1
PSRR Power supply rejection ratio
80
Vo Output voltage swing
9
ERROR AMPLIFIER
Vi Input voltage range
VCC/2
-0.5
Vos Input offset voltage
-5
Ib Input Bias current
-500
Gv Open Loop voltage Gain
80
SR Output slew rate
0.6
GBW Gain bandwidth product
1
PSRR Power supply rejection ratio
80
Vo Output voltage swing
VCC/2
-2Vbe
SENSE AMPLIFIER
Vi Input voltage range
Gnd
Vos Input offset voltage
-6
Ii Input sink and source current
-1.5
PSRR Power supply rejection ratio
50
Gv Vloltage gain
9.9
Rin Differential input resistance
3
GBW Gain bandwidth product
1
Vli Linear differential input voltage Gv = 10(V/V)
range
-0.35
CMRR Common mode rejection ratio
56
Typ.
5.00
10
Max.
0.40
0.80
5.25
+2
Vref (+)
5.00
+5
+5
+500
VCC/2
+0.5
+5
+500
VCC/2
+2Vbe
Vcc
+6
+1.5
10.1
+0.55
Unit
KΩ
mA
V
V
V
V
V
%
mA
V
V
V
mV
nA
dB
V/µs
MHz
dB
V
V
mV
nA
dB
V/µs
MHz
dB
V
V
mV
mA
dB
V/V
KΩ
MHz
V
dB
5/12
5 Page 
PQFP44 (10x10) PACKAGE MECHANICAL DATA
DIM.
A
A1
A2
B
c
D
D1
D3
e
E
E1
E3
L
L1
K
MIN.
0.25
1.95
0.30
0.13
12.95
9.90
12.95
9.90
0.65
mm
TYP.
2.00
13.20
10.00
8.00
0.80
13.20
10.00
8.00
0.80
1.60
MAX.
2.45
2.10
0.45
0.23
13.45
10.10
MIN.
0.010
0.077
0.012
0.005
0.51
0.390
13.45
10.10
0.510
0.390
0.95 0.026
0°(min.), 7°(max.)
inch
TYP.
0.079
0.52
0.394
0.315
0.031
0.520
0.394
0.315
0.031
0.063
L6246
MAX.
0.096
0.083
0.018
0.009
0.53
0.398
0.530
0.398
0.037
D
D1
D3
33
34
23
22
A
A2
A1
0.10mm
.004
Seating Plane
44
1
e
12
11
PQFP44
C
K
11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet L6246.PDF ] | |
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