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L7250 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 L7250은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 L7250 자료 제공

부품번호 L7250 기능
기능 5V & 12V SPINDLE AND VCM MOTORS DRIVER
제조업체 STMicroelectronics
로고 STMicroelectronics 로고


L7250 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




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L7250 데이터시트, 핀배열, 회로
L7250
5V & 12V SPINDLE AND VCM MOTORS DRIVER
PRODUCT PREVIEW
s 12V & 5V (±10%) OPERATION
s REGISTER BASED ARCHITECTURE
s 3 WIRE SERIAL COMMUNICATION
INTERFACE UP TO 33 MHZ
s BCD TECHNOLOGY
Spindle Motor Controller
s INTERNAL POWER DEVICE 0.9 OHM MAX
VALUE @ 125°C (SINK+SOURCE)
s 2.5A PEAK CURRENT CAPABILITY
s ST SMOOTHDRIVE SINUSOIDAL PWM
COMMUTATION
s DEDICATED ADC FOR POWER SUPPLY
VOLTAGE COMPENSATION
s SPINDLE CURRENT LIMITING VIA FIXED
FREQUENCY PWM OF SPINDLE POWER
OUTPUTS AT THE SMOOTHDRIVE PWM
RATE
s SYNCHRONOUS RECTIFICATION DURING
PWM TO REDUCE POWER DISSIPATION
s CURRENT SENSING VIA EXTERNAL
CURRENT SENSE RESISTOR
s INDUCTIVE SENSE POSITION START UP
DRIVEN BY µPROCESSOR
s SPINDLE BRAKING DURING POWER DOWN
CONDITION
Voice Coil Motor Driver with Ramp Load/Unload
s INTERNAL POWER DEVICE 0.9 OHM MAX
VALUE @ 125°C (SINK+SOURCE)
s 2A PEAK CURRENT CAPABILITY
s 15 BIT LINEAR DAC FOR CURRENT
COMMAND, WITH INTERNAL REFERENCE
VOLTAGE
s SENSE AMPLIFIER GAIN SWITCH
s CLASS AB OUTPUT STAGE WITH ZERO
DEAD-BAND AND MINIMAL CROSSOVER
DISTORTION
s RAMP LOAD AND UNLOAD CAPABILITY AS
WELL AS CONSTANT VOLTAGE RETRACT
s EXTERNAL CURRENT SENSE RESISTOR IN
SERIES WITH MOTOR.
s HIGH CMRR (>70DB) AND PSRR (>60DB)
SENSE AMP
s EXTERNAL CURRENT CONTROL LOOP
COMPENSATION
s HIGH BANDWIDTH VCM CURRENT
CONTROL LOOP CAPABILITY
s HIGH PSRR, LOW OFFSET, LOW DRIFT GM
LOOP
TQFP64
ORDERING NUMBER: L7250
s VCM VOLTAGE MODE, CONTROLLED BY
VCM DAC
s GM LOOP OFFSET CALIBRATION SCHEME
INCLUDES A COMPARATOR ON THE
ERROR AMP
Auxiliary Functions
s 3.3V AND 1.8V LINEAR REGULATOR
CONTROLLER
s NEGATIVE VOLTAGE REGULATOR
s INTERNAL ISOFET 0.1 OHM @125C
s POWER MONITOR OF 12V, 5V, 3.3V AND
1.8V
s SHOCK SENSOR CIRCUIT TAKES INPUTS
FROM PIEZO OR CHARGING ELEMENT
s 10 BIT ADC WITH 4 MUXED INPUTS
s THERMAL SENSE CIRCUIT AND OVER
TEMPERATURE SHUT DOWN
s CHARGE PUMP BOOST VOLTAGE
GENERATOR FOR HIGH SIDE GATE DRIVE
s ANALOG PINS AVAILABLE TO ENTER
SIGNALS TO BE CONVERTED BY THE
INTERNAL ADC
DESCRIPTION
L7250 is a power IC for driving the SPINDLE and
VCM motors, suitable for 5V & 12V application. The
spindle system includes integrated power FETs
which are driven using ST's Smoothdrive pseudo-si-
nusoidal commutation technology. The voice coil mo-
tor (VCM) system includes integrated power FETs,
as well as ramp load and unload capability. Linear
3.3V and1.8V voltage regulators are included, as well
as a negative regulator.
Power monitoring of VCC5, VCC12, and of the two
positive voltage regulators is also included.L7250
uses a 3 wire serial interface: S_DATA, S_CLK and
S_ENABLE
July 2001
1/46
This is preliminary information on a new product now in development. Details are subject to change without notice.




L7250 pdf, 반도체, 판매, 대치품
L7250
PIN DESCRIPTION (continued)
N° Pin
V
Description
44 VCMGND4 gnd VCM power ground
45
VCMN1
O12 VCM negative output
46
VCMN2
O12 VCM negative output
47
RSEN1
O12 Spindle power sensing resitor
48
RSEN2
O12 Spindle power sensing resitor
49 Rsense I5 Spindle sensing resistor input
50
OUTW1
O12 Spindle phase C output
51
OUTW2
O12 Spindle phase C output
52
VM1
IO12 Vmotor
53
VM2
IO12 Vmotor
54
VCV4
S12 12V power supply
55
VCV3
S12 12V power supply
56
OUTV1
O12 Spindle phase B output
57
OUTV2
O12 Spindle phase B output
58
RSEN3
O12 Spindle power sensing resitor
59
RSEN4
O12 Spindle power sensing resitor
60
OUTU1
O12 Spindle phase A output
61
OUTU2
O12 Spindle phase A output
62 CT I12 Spindle central tap
63 CPOSCH IO20 Charge pump diodes connection
64 VBOOST IO20 Charge Pump voltage
(*) used also to set the IC power supply application. If this pin is pull-up externally the L7250 became a 5V application
S = Supply ; IO = Input/Output ; I = Input ; O = Output ; gnd = Ground.
4/46

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L7250 전자부품, 판매, 대치품
L7250
ELECTRICAL CHARACTERISTCS (continued)
POWER SUPPLY [VCC5 & VCV] VCC5 = 5V ±10%, VCV = 12V ±10%. Tamb = 25°C (unless otherwise specified)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
CURdacr DAC resolution
3 bit
CURdac_L DAC output
Reg04H ‘b4b3b2’ = 000
250 mV
CURdac_H DAC output
Reg04H ‘b4b3b2’ = 111
600 mV
CURlin DAC linearity
-10 +10 mV
Cbrake
Icbrake VCbrake leakage
VCbrake=5V
1 µA
VCM SECTION
CURRENT SENSE AMPLIFIER
Vts Common mode input voltage
range.
Sns _voff Input offset voltage
Sns_gain0 Differential Voltage GAIN0
Sns _gain1 Differential Voltage GAIN1
Sns_low VSENSE output saturation
voltage
Sns_high
sns_slew Output slew rate
Sns_band -3dB Bandwidth
GBD - not tested
Reg09H ‘b7’ = 0
Reg09H ‘b7’ = 1
Iload=+/-1mA
Vin_diff=+/- 500mV
Cload=50pF
Guaranteed by design
-0.6 VM+1 V
-12 12 mV
-5% 4.5 +5%
-5% 16 +5%
250 mV
4.75
1
200 400
V
V/µs
kHz
sns _cmrr Common mode rejection ratio
f < 10 KHz, tested at DC only
CMRR=AV DIFF/AV CM
sns _svrr supply voltage rejection ratio VCV f < 10 KHz, tested at DC only
ERROR SUMMING AMPLIFIER
err _gain Voltage gain
no load
err _band Unity gain bandwidth
Guaranteed by design
err _slew Output Slew Rate
Cload=50pF
err _ibias Input bias current
err _off Input offset voltage
err_svrr supply voltage rejection ratio
f < 10 KHz, tested at DC only
err _clamp Low output (clamp) voltage
low
Isink = 1 mA, referred to Vref25
70
60
60
1.5
-10
60
dB
dB
dB
4 MHz
V/µS
1 µA
0 10 mV
dB
TBD
V
7/46

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부품번호상세설명 및 기능제조사
L7250

5V & 12V SPINDLE AND VCM MOTORS DRIVER

STMicroelectronics
STMicroelectronics

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