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L6239 Datasheet

  • L6239

  • 155.36KB

  • 13頁

  • ETC

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L6239
12V DISK DRIVE SPINDLE DRIVER
PRODUCT PREVIEW
General
12V OPERATION
REGISTER BASED ARCHITECTURE
SLEEP AND IDLE MODES FOR LOW
POWER CONSUMPTION
SERIAL INTERFACE
Spindle Driver
BEMF PROCESSING FOR SENSOR-LESS
MOTOR COMMUTATION
INTERNAL POWER DEVICES
PROGRAMMABLE SLEW-RATE FOR RE-
DUCED E.M.I.
20 FOR ANY HALF BRIDGE WORST CASE
(1鈩?PER DEVICE)
B.E.M.F. DETECTION READABLE FROM
REGISTER OR PIN
NO SNUBBERS REQUIRED FOR LOOP
COMPENSATION OR E.M.I. CONTROL
Other Functions
POWER UP SEQUENCING
POWER DOWN SEQUENCING
PWM OPERATION
LOW VOLTAGE SENSE
DYNAMIC BRAKE
THERMAL WARNING
THERMAL SHUTDOWN
NEGATIVE VOLTAGE REGULATOR SUP-
PORT
DESCRIPTION
The L6239 is a single chip sensorless (DC) spin-
dle motor controller including power stages suit-
able for use in disk drives.
The device has a serial interface for a microproc-
essor running up to 10 mega bits per second.
There are registers on chip to allow the setting of
the desired operating modes No external compo-
nents are required in the sensor-less operation as
the control functions are integrated on chip (e.g.
March 1995
MULTIPOWER BCD TECHNOLOGY
PLCC44
ORDERING NUMBER:
L6239
B.E.M.F. processing & digital masking).
When a power On Reset (P.O.R.) is accepted,
the internal registers are reset, the spindle power
circuitry is tri-stated, and dynamic braking of the
spindle is applied.
This device is built in BCD II technology allowing
dense digital/analog circuitry to be combined with
high power DMOS output stage.
PIN CONNECTION
Rsense1
Rsense3
Rsense2
Out C
Out C
Out A
Out A
Out B
Out B
GND
6
GND
Vpower
Vpower
Cpump1
Vpump
Cpump2
Vanalog
bemf_det
Vreg_Base
Vreg_Vsense
GND
7
8
9
10
11
12
13
14
15
16
17
5
4
3
2
1 44 43 42 41 40
39
38
37
36
35
34
33
32
31
30
29
GND
AGND
N.C.
Ctr Tap
CSA Input
PWM/Slew
gm Comp
Gate Drive
PWM Timer
N.C.
GND
18 19 20 21 22 23 24 25 26 27 28
SYS CLOCK
SDIO
POR
Seq. Increment
Vreg_Isense
Vdgtl
R/W
Sclk
SLoad
Brake
N.C.
D95IN222
GND
1/13
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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