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L6238S Datasheet(PDF) 5 Page - STMicroelectronics

Part # L6238S
Description  12V SENSORLESS SPINDLE MOTOR CONTROLLER
PDF  31 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6238S Datasheet(HTML) 5 Page - STMicroelectronics

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PIN FUNCTIONS
PLCC44 PQFP44 TQFP64
Name
I/O
Function
38
32
45
GATE DRIVER
I/O
Drivers the Ext. PFET Gate Driver for Higher Power applications.
This pin must be grounded if an external driver is not used.
41
35
51
MASK/DELAY
O
Internal Logic Signals used for production Testing
43
37
54
CENTER TAP
I
Motor Center Tap used for differential BEMF sensing.
44
38
55
PWM/SLEW
I
R/C at this input set the Linear Slew Rate and PWM OFF-Time
0.0
0.3
1.0
3.0
Cb(
µF)
0.0
0.3
1.0
3.0
TBD
(s)
D95IN274
Figure 1: Brake Delay Timeout vs Cbrake
(Rbrake = 1Meg)
10
30
100
300
Rs(K
Ω)
0.0
0.3
1.0
3.0
SVR
(V/
µs)
D95IN275
Figure 2: Linear Slew Rate vs Rslew
100
300
Coff(pF)
1
3
10
30
PWM
(
µs)
D95IN276
Figure 3: PWM Off - Time vs Rslew/Coff
100
300
Ctimer(pF)
10
30
PWM
(
µs)
D95IN277
Figure 4: PWM Limit Time - Out vs Ctimer
L6238S
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