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STMicroelectronics Electronic Components Datasheet

L6243 Datasheet

VOICE COIL MOTOR DRIVER

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L6243 pdf
L6243
L6243D
VOICE COIL MOTOR DRIVER
12V/5V OPERATION
PARKING FUNCTION FOR HARD DISK
HEAD ACTUATOR
OUTPUT CURRENT UP TO 2A DC, 2.5A
PEAK
LOW SATURATION VOLTAGE
LOGIC AND POWER SUPPLY MONITOR
LINEAR CONTROL
THERMAL PROTECTION
ENABLE FUNCTION
CURRENT SENSE RESISTOR CONNEC-
TIONS
DESCRIPTION
The L6243/D is a Bipolar IC developed for use in
Hard Disk Head Actuator positioning applications.
The Power Op-Amp Output Bridge, Differential
Amplifier, and Error Amplifier, are controlled by
TTL/CMOS, input compatible, Digital Logic, and
an Analog Current Control Voltage. A simple
RC compensation network, tied to the output of
the Error Amp, will configure the system to work
BLOCK DIAGRAM
PLCC44
SO(24+2+2)
ORDERING NUMBERS:
L6243
L6243D
as a Transconductance Amplifier to drive a
Voice Coil Motor in Linear Mode.
Additional features include Power On Reset De-
lay, Enable and Park, as well as a general pur-
pose Operational Amplifier. A logic low at the
Park input activates the parking function. Holding
the Enable input low will disable the device by
forcing the outputs into a tristate mode. Power
Fail Monitors for the logic and power supplies in-
itiate an automatic parking sequence during a
power failure. A resistor programmed parking
voltage enables a constant velocity head retract.
July 1996
1/12
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.


STMicroelectronics Electronic Components Datasheet

L6243 Datasheet

VOICE COIL MOTOR DRIVER

No Preview Available !

L6243 pdf
L6243-L6243D
PIN CONNECTION (Top view)
PLCC-44
GND
ERROR AMP INPUT
ERROR AMP OUTPUT
OP AMP -INPUT
OP AMP +INPUT
OP AMP OUTPUT
GND
WRITE DISABLE OUTPUT
POWER ON RESET OUTPUT
PARK VOLTAGE PROGRAM
GND
6 5 4 3 2 1 44 43 42 41 40
7 39
8 38
9 37
10 36
11 35
12 34
13 33
14 32
15 31
16 30
17 29
GND
SENSE AMP INPUT A
N.C.
GND
N.C.
GND
N.C.
N.C.
GND
ENABLE INPUT
GND
18 19 20 21 22 23 24 25 26 27 28
D96IN449
SO 24+2+2
VREF
N.C.
N.C.
N.C.
ERROR AMP INPUT
ERROR OUTPUT
GND
GND
WRITE DISABLE OUTPUT
POWER ON RESET OUTPUT
PARK VOLTAGE PROGRAM
POWER FAIL THRESHOLD
VCC SENSE OUTPUT
POWER ON RESET DELAY
1 28
2 27
3 26
4 25
5 24
6 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
D96IN450
SENSE AMP OUTPUT
VCC
PARK POWER
OUTPUT B
SENSE AMP INPUT B
SENSE AMP INPUT A
GND
GND
ENABLE
PARK INPUT
OUTPUT A
5V FILTER
VCC
LOGIC SUPPLY SENSE (5V)
2/12


Part Number L6243
Description VOICE COIL MOTOR DRIVER
Maker STMicroelectronics
Total Page 12 Pages
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