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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 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 191K |
| 代理商： | L6245 |
PIN DESCRIPTION
(continued)
Pin Number
44
Pin Name
SYNTH_HALL
Pin Type
O
Description
A TTL compatible signal that emulates one of the Hall signals.
SYNTH_HALL is an open drain output with an internal 20K
pull-up.
The current sensing resistors is connected from these pins to ground.
49, 50,
58
46
56
51
SPIN SENSE
1,2,3
PWM_OFFT
SLEW
S_COMP
A
A
A
A
A parallel R-C from this pin to ground sets the PWM mode OFF time.
A resistor from this pin to ground setsthe slew rate of the driver.
An R-C network from this pin to GND sets the spin driver
compensation.
VCM Driver and 8 bit D/A
Pin Number
8
9
21
14
23
Pin Name
VCM_DAC
VCM_CMD
VCM_COMP
VCM_RS1
VCM_RS2
Pin Type
O
I
A
A
A
Description
The output of an 8 bit D/A used to command the VCM driver.
VCM driver input command which is relative to V
REF
.
An R-C network from this pin to ground compensates the VCM driver.
The high gain currentsense resistor is attached from this pin to ground.
The low gain current sense resistor isconnected from this pin to
VCM_RS1
One end of the load is attached to this pin (Positive).
The other end of the load is attached to this pin (Negative).
A voltage which is proportional to the voltage across the load,
referenced to V
REF
.
A voltage which is proportional to the current through the load,
referenced to V
REF
.
Over-velocity summing op-amp inverting input.
Over-velocity summing op-amp output.
13
15
20
VCM+
VCM-
OV_VOLT
O
O
O
19
OV_CUR
O
16
18
OV_SUM–
OV_SUM_OUT
I
O
22
ISENSE
O
A voltage which is proportional to the current through the VCM load as
sensed by the sense resistor. This signal isenabled by setting bit 2 in
the VCM Control Register.
The 8 bit input to the VCM D/A is updated on the rising edge of
VCM_STRB.
54
VCM_STRB
I
Solenoid Pre-drivers and Power Down Sequencing
Pin Number
11,55,
63
Pin Name
V_RECIR
Pin Type
P
Description
Under normal conditions, power is supplied to various blocks via the
V_RECIR pin. When external power is removed, energy stored in the
rotating spindle is converted toa voltage which suppliesthe parkcircuit.
When a logic one is written to bit 3 of the VCM Control Register,
current is sourced from the LOAD_SOL pin. Otherwise, the pin is high
impedance.
When a logic one is written to bit 4 of the VCM Control Register,
current is sourced from the UNLOAD_SOL pin. Otherwise, the pin is
high impedance.
When power is removed, the charge stored on this capacitor keeps
selected blocks alive long enough to effect an orderly power down.
An external parallel RC network from this point to ground delays
activation of the dynamic brake after power is removed.
2
LOAD_SOL
O
1
UNLOAD_SOL
O
4
PD_SEQ_CAP
A
52
BRK_DLY
A
L6245
5/15
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| L6246 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:12V VOICE COIL MOTOR DRIVER |
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| 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 |
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| 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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