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參數(shù)資料
| 型號： | L6246 |
| 廠商： | 意法半導體 |
| 英文描述： | 12V VOICE COIL MOTOR DRIVER |
| 中文描述： | 12V的音圈電機驅(qū)動 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 103K |
| 代理商： | L6246 |
L6246
12V VOICE COIL MOTOR DRIVER
12V (
±
10%) OPERATION
3A MAXIMUMCURRENT CAPABILITY
0.3
MAXIMUM ON RESISTANCE OF EACH
POWER DMOS AT
PERATAURE OF 25
°
C
CLASS ABPOWER AMPLIFIERS
LOGIC AND POWER SUPPLY MONITOR
POWER ON RESET
PARKING FUNCTION WITH SELECTABLE
RETRACT VOLTAGE AND DYNAMIC BRAKE
BEFORE PARKING
ENABLEFUNCTION
GATE DRIVER FOR EXTERNAL BLOCKING
N-MOSFET
OVERTEMPERATUREPROTECTION
OVERTEMPERATUREWARNING OUTPUT
PQFP44PACKAGE
A
JUNCTION
TEM-
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 transconductanceloop,
which allows high precision for head positioning.
The power stage is composedof 2 power amplifi-
ers, in AB class, with 4 DMOSs, with Rdson of
0.5
(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.
Automaticbrake and parking of the head actuator
is performed by logic or when a failure condition
is detectedby 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
PQFP44(10x10)
MULTIPOWER BCD TECHNOLOGY
1/12
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