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參數(shù)資料
| 型號(hào)： | L6245 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 5V HARD DISK DRIVE POWER COMBO |
| 中文描述： | 5V的硬盤驅(qū)動(dòng)器電源組合 |
| 文件頁(yè)數(shù)： | 1/15頁(yè) |
| 文件大小： | 191K |
| 代理商： | L6245 |
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L6245
5V HARD DISK DRIVE POWER COMBO
PRODUCT PREVIEW
General
+5V OPERATION
REGISTER BASED ARCHITECTURE
MINIMUMEXTERNAL COMPONENTS
SLEEP
AND
IDLE
POWERCONSUMPTION
SELECTABLE GAINS FOR BOTH VCM AND
SPINDLEGm LOOP
LINEAR CURRENT CONTROL LOOPS FOR
BOTH VCM AND SPINDLE
8 BIT D/A FOR ACTUATOR DRIVER AND
SPINDLEDRIVER
MODES
FOR
LOW
VCM Driver
CURRENT SENSE CONTROL (VOLTAGE
PROPORTIONAL TO CURRENT)
VOLTAGE SENSE
PROPORTIONAL
TO
ACROSS THE VCM)
TWO CURRENT RANGES FOR SEEKING
AND TRACKING
INTERNAL REGISTER FOR POWER AMP
CONTROL LINES
SPEED
OUTPUT
TIONAL TO BEMF)
CONTROL
(VOLTAGE
VOLTAGE
THE
(VOLTAGE
PROPOR-
Spindle Driver
BEMF PROCESSING FOR SENSORLESS
MOTOR COMMUTATION
PROGRAMMABLE COMMUTATION PHASE
DELAY
PROGRAMMABLE SLEW-RATE FOR RE-
DUCED EMI
0.7
TYP. FOR ANY HALFBRIDGE
CROSS CONDUCTION PROTECTION
SYNTHESIZEDHALL OUTPUT
OtherFunctions
POWER UP SEQUENCING
POWER DOWN SEQUENCING
LOW VOLTAGESENSE
ACTUATOR RETRACTION
DYNAMIC BRAKE
THERMAL SHUTDOWN
DESCRIPTION
The L6245 contains in a single chip all the func-
tions to operate a sensorless brushless (DC) mo-
tor and a voice coil motor, suitable for hard disk
drive applications.
The device is configured to interface directly to
an 8 bit parallel microprocessor bus, and has a
register based architecture to reduce number of
interconnection lines. All the positioning loop for
sensorless spindle is integrated, including BEMF
sensing, digital masking, digital delay and se-
quencing. All timing function are performed digi-
tally, thus no external filtering componentsare re-
quired.
The VCM driver is a transconductanceamplifier,
able to provide 2 differentcurrent ranges, suitable
for seeking or tracking of the head actuator.
When a low voltage is detected, a monitor, in se-
quence, resets the internal registers, puts in tris-
tate the spindle powers, retractsthe actuator, and
appliesthe dynamicbrake of the spindle.
The L6245 is realized in Multipower-BCD 2 tech-
nology, which combine isolate DMOS power tran-
sistors with CMOS and
same monolithic layer, and is assembled in a 64-
pin PQFP.
Bipolar circuits in the
This is advanced information on a new product now indevelopment or undergoing evaluation. Details are subjectto change withoutnotice.
October 1992
PQFP64
ORDERING NUMBER:
L6245
MULTIPOWER BCD TECHNOLOGY
1/15
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6246 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:12V VOICE COIL MOTOR DRIVER |
| L624F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:THYRISTOR MODULE|BRIDGE|HALF-CNTLD|CA|480V V(RRM)|42.5A I(T) |
| L625 | 制造商:Lufkin 功能描述:25' Ultralok Tape Measure 制造商:Lufkin 功能描述:LUFKIN 25 FEET ULTRALOK TAPE MEASURE, COLOR: HI-VIZ ORANGE, WIDTH: 1 , FEATURES: ONE PIECE SLIDE LOCK HOLDS BLADE FIRMLY AT ANY LENGTH, BUILT-IN SHOCK ABSORBER CUSHIONS BLADE RETURN & PROTECTS END HOOK, FEET, INCH MARKS & STUD MARKIN |
| L6-250BLU | 功能描述:JUMPER 0.025" SQ SOCKET 6" BLUE RoHS:是 類別:測(cè)試設(shè)備 >> 測(cè)試引線 - 跳線，專用型 系列:E-Z-LINK 標(biāo)準(zhǔn)包裝:1 系列:MG-B 配置:短頭鱷魚夾至短頭鱷魚夾 第一連接器:接線夾，微型，絕緣 第二連接器:接線夾，微型，絕緣 線纜長(zhǎng)度:60.0"（1524.00mm） 所含物品:1 根引線，橙 材料 - 絕緣體:聚氯乙烯（PVC） 線規(guī):18 AWG 電壓 - 額定:33VAC，70VDC 額定電流:5A 溫度范圍:122°F（50°C） 其它名稱:5995008270878 |
| L6254 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:12V DISK DRIVE SPINDLE & VCM, POWER & CONTROL “COMBO” |
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