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L6229PD Datasheet(PDF) 10 Page - STMicroelectronics

Part # L6229PD
Description  DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR
PDF  25 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6229PD Datasheet(HTML) 10 Page - STMicroelectronics

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verse recovery of the freewheeling diodes. The L6229 provides a 1µs Blanking Time tBLANK that inhibits the
comparator output so that the current spike cannot prematurely retrigger the monostable.
Figure 10. PWM Current Controller Simplified Schematic
Figure 11. Output Current Regulation Waveforms
DRIVERS
+
DEAD TIME
S
Q
R
DRIVERS
+
DEAD TIME
DRIVERS
+
DEAD TIME
OUT3
OUT2
SENSEB
SENSEA
RSENSE
D02IN1380
RCOFF
ROFF
COFF
VREF
OUT1
+
+
-
-
1
µs
5mA
BLANKER
SENSE
COMPARATOR
MONOSTABLE
SET
2.5V
5V
FROM THE
LOW-SIDE
GATE DRIVERS
BLANKING TIME
MONOSTABLE
VSB
VS
VSA
TO GATE
LOGIC
(0)
(1)
OFF
BC
DD
A
tON
tOFF
BC
ON
2.5V
0
Slow Decay
Slow Decay
1
µs tBLANK
tRCRISE
tRCRISE
SYNCHRONOUS RECTIFICATION
1
µs tBLANK
5V
VRC
VSENSE
VREF
IOUT
VREF
RSENSE
D02IN1351
tOFF
1
µs tDT
1
µs tDT
tRCFALL
tRCFALL



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