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L6238 Arkusz danych(PDF) 4 Page - STMicroelectronics

Numer części L6238
Szczegółowy opis  SENSORLESS SPINDLE MOTOR CONTROLLER
Download  35 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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ELECTRICAL CHARACTERISTICS (Refer to the test circuit, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
POWER SECTION
VPower
Motor Supply
10.5
12
13.5
V
RDS(on)
Output ON Resistance
Tj =25
°C
Tj = 125
°C
0.25
0.33
0.50
Io(leak)
Output Leakage Current
1
mA
VF
Body Diode Forward Drop
Im = 2.0A
1.5
V
dVo/dt
Output Slew Rate
Rslew = 100K
0.30
V/
µs
Im(max)
Motor Current Limit (Note 1)
Rs = 0.33
Ilim Gain = 0
Ilim Gain = 1
TBD
TBD
0.75
0.38
TBD
TBD
A/V
A/V
Igt
Gate Drive for Ext. Power
DMOS
ILIMSET =5V
Ilim Gain = 0
V33 = 0V, V38 = 5V
5mA
Tsd
Shut Down Temperature
150
180
°C
Thys
Recovery Temperature
Hysteresis
30
°C
Tew
Early Warning Temperature
Tsd-25
°C
Isnsin
Current Sense Amp Input Bias
Current
10
µA
GV
Current Sense Amp Voltage
Gain
3.8
4
4.2
V/V
ZinCT
Center Tap Input Impedance
30
K
PIN FUNCTIONS (continued)
N.
Name
I/O
Function
23
RUN/BRAKE
I
Rising edge will initiate start-up. A Braking rountine is started when this input is
brought low.
24
SEQ INCREMENT
I
A low to high transition on this pin increments the Output State Sequencer.
25
SYSTEM CLK
I
Clock Frequency for the system timer/counters.
26
EXT INDEX
I
External Source of Feedback for the PLL.
27
PLL Fref
I
Reference Frequency for the PLL.
28
LOCK
O
High when the PLL is phase_locked.
30
Vlogic
I
Logic power supply.
31
DETECTOR OUT
O
Output of Frequency/Phase Detector.
32
FILTER IN
I
Filter Input.
33
FILTER COMP
O
Filter output and compensation.
34
CSA INPUT
I
Input to the Current Sense Amplifier.
35
Rsense
O
Output C connection for the Motor Current Sense Resistor to ground.
36
OUTPUT C
I/O
DMOS Half Bridge Output and Input C for Bemf sensing.
37
gm COMP
I
A series RC network to ground that defines the compensation of the
Transconductance Loop.
38
GATE DRIVE
I/O
Drives the Gate of the External P Channel DMOS Driver for Higher Power
Applications. This pin must be grounded if an external driver is not used.
41
I LIMIT SET
I
A voltage applied to this pin, in conjunction with the value for the external
Motor Current Sensing resistor, defines the maximum Motor Current.
43
CENTER TAP
I
Motor Center Tap used for differential BEMF sensing. If the center tap of the
Motor is not brought out, a virtual center tap is integrated and available at this
pin.
44
SLEW RATE
I
A resistor connected to this pin sets the Voltage Slew Rate of the Output
Drivers.
L6238
4/35


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