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參數(shù)資料
| 型號： | L6245 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | VOICE COIL MOTOR CONTROLLER, 1.5 A, PQFP64 |
| 封裝： | PLASTC, QFP-64 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大小： | 1025K |
| 代理商： | L6245 |
PIN DESCRIPTION (continued)
Pin Number
Pin Name
Pin Type
Description
44
SYNTH_HALL
O
A TTL compatible signal that emulates one of the Hall signals.
SYNTH_HALL is an open drain output with an internal 20K
pull-up.
49, 50,
58
SPIN SENSE
1,2,3
A
The current sensing resistors is connected from these pins to ground.
46
PWM_OFFT
A
A parallel R-C from this pin to ground sets the PWM mode OFF time.
56
SLEW
A
A resistor from this pin to ground sets the slew rate of the driver.
51
S_COMP
A
An R-C network from this pin to GND sets the spin driver
compensation.
VCM Driver and 8 bit D/A
Pin Number
Pin Name
Pin Type
Description
8
VCM_DAC
O
The output of an 8 bit D/A used to command the VCM driver.
9
VCM_CMD
I
VCM driver input command which is relative to VREF.
21
VCM_COMP
A
An R-C network from this pin to ground compensates the VCM driver.
14
VCM_RS1
A
The high gain current sense resistor is attached from this pin to ground.
23
VCM_RS2
A
The low gain current sense resistor is connected from this pin to
VCM_RS1
13
VCM+
O
One end of the load is attached to this pin (Positive).
15
VCM-
O
The other end of the load is attached to this pin (Negative).
20
OV_VOLT
O
A voltage which is proportional to the voltage across the load,
referenced to VREF.
19
OV_CUR
O
A voltage which is proportional to the current through the load,
referenced to VREF.
16
OV_SUM–
I
Over-velocity summing op-amp inverting input.
18
OV_SUM_OUT
O
Over-velocity summing op-amp output.
22
ISENSE
O
A voltage which is proportional to the current through the VCM load as
sensed by the sense resistor. This signal is enabled by setting bit 2 in
the VCM Control Register.
54
VCM_STRB
I
The 8 bit input to the VCM D/A is updated on the rising edge of
VCM_STRB.
Solenoid Pre-drivers and Power Down Sequencing
Pin Number
Pin Name
Pin Type
Description
11,55,
63
V_RECIR
P
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 to a voltage which supplies the park circuit.
2
LOAD_SOL
O
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.
1
UNLOAD_SOL
O
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.
4
PD_SEQ_CAP
A
When power is removed, the charge stored on this capacitor keeps
selected blocks alive long enough to effect an orderly power down.
52
BRK_DLY
A
An external parallel RC network from this point to ground delays
activation of the dynamic brake after power is removed.
L6245
5/15
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