參數(shù)資料
型號(hào)： L6256
廠商： 意法半導(dǎo)體
英文描述： 12V COMBO
中文描述： 12V的組合
文件頁(yè)數(shù)： 1/28頁(yè)
文件大?。?/td> 258K
代理商： L6256
L6256
12V COMBO
DESCRIPTION
The 12 Volt Combo chip is a combination spindle
motor driver, voice coil driver and D/A converter.
The part can be used in,application like HDD.
The VCM amplifiers drive a low impedance coil
and are set up to accept RC compensation, which
allows a wide bandwidth with absolute minimum
phase lag. The sense resistor/amplifier arrange-
ment allows full current loop operation. The loop
gain is changeable by attenuating the VCM DAC
voltage amplitude in cascadable stages.
The Spindle driver is a PWM only voltage loop
with power supply feedforward, driving a 3 phase
sensorless brushless DC motor. Since it uses
PWM operation at full run speed, it has output
slew rate control during start and run modes.
There is an inductive clamp circuit to limit flyback
voltage transients across the supply voltage dur-
ing motor phase changes and during the braking
sequence. Only the 2 phase or bipolar commuta-
tion pattern is produced by the internal commuta-
tion circuitry. A commutation register allows arbi-
Figure 1. Block Diagram
trary winding sequencing during certain opera-
tions. Internal protection against crossover
spikes is built in.
3 phase or tripolar commutation can be supported
in software during start by writing a commutation
pattern directly to the preload register.
Tripolar operation requires that more than two
phase drivers contribute current simultaneously.
The current limit circuitry reflects this and allows
33% higher current limit, which produces nearly
December 1997
CHARGE
PUMP
VPWR
2
UV
DETECT
POR
VCM
COMMAND
CHANNEL
10 BIT
DAC
VCM
RETRACT
VCM CONTROL
CLK
SYNC
SERIAL INTERFACE
BANDGAP
VOLTAGE
REFERENCE
CURRENT
SOURCES
SPINDLE LOGIC
SPINDLE SEQUENCER
ANALOG
TEST MUX
3
24
3.3V LINEAR
REGULATOR
3
FEEDFORWARD
COMPENSATION
VCM
LOGIC
THERMAL
h_vpwr
h_vpwr
+
-
A
AMP
+
-
B
AMP
A_OUT
B_OUT
BRAKE
DELAY
COUNTER
BEMF SENSING
ZERO CROSSING
DETECTION
PWR GND
VCM CLASS AB
DRIVERS
R_
SLEW
PWM_
IN
PWM_
DC
FF_
COMP
SP_
CLK
upper
lower
PRE-DRIVERS
DYNAMIC
CLAMPING
SPINDLE DRIVERS
CURRENT
LIMIT
SENSING
SH_
OUT
BEMF_
DET
SP_
G2
SP_
G1
REF_
IN
C_TAP
SP_C
SP_B
SP_A
SP_P2
SP_P1
VC_PWR
A_IN
I_VC
IO_VC
DAC
CP_OUT
CP_CAP
H_VPWR
VDD
VCC
nPOR
POR_RC
PARK
SCLK
SDIO
CSELB
BYPASSC
QDRIVE
VREG_IN
CUR_IN
6,7,17,29,39,40
8
11
36
37
5
38
12
35
44
4
41
3
1
43
42
2
24
23
25
30
26
31
32
18
19
33
34
15
10
9
27
13
14
28
16
20
21
22
D97IN571
SYNC
CLAMP
PLCC44
ORDERING NUMBER:
L6256
1/28
相關(guān)PDF資料
PDF描述
L6258E PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER
L6258EX PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER
L6260 4.5 - 5.5V DISK DRIVER SPINDLE & VCM, POWER & CONTROL COMBO’S
L6268 12V DISK DRIVE SPINDLE & VCM, POWER & CONTROL “COMBO”
L6269 12V DISK DRIVE SPINDLE & VCM, POWER & CONTROL “COMBO”
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6258 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver
L6258_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver
L6258A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Stepper Motor Controller/Driver
L6258E 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
L6258E_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver
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