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L6235Q Arkusz danych(PDF) 1 Page - STMicroelectronics

Numer części L6235Q
Szczegółowy opis  Tacho output for speed loop
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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November 2011
Doc ID 018997 Rev 2
1/33
33
L6235Q
DMOS driver for 3-phase brushless dc motor
Features
Operating supply voltage from 8 to 52 V
5.6 A output peak current
RDS(on) 0.3 Ω typ. value @ TJ = 25 °C
Operating frequency up to 100 kHz
Non-dissipative overcurrent protection
Diagnostic output
Constant tOFF PWM current controller
Slow decay synchronous rectification
60° and 120° Hall effect decoding logic
Brake function
Tacho output for speed loop
Cross conduction protection
Thermal shutdown
Undervoltage lockout
Integrated fast freewheeling diodes
Description
The L6235Q is a DMOS fully integrated 3-phase
motor driver with overcurrent protection. Realized
in BCDmultipower technology, the device
combines isolated DMOS power transistors with
CMOS and bipolar circuits on the same chip. The
device includes all the circuitry needed to drive a
3-phase BLDC motor including: a 3-phase DMOS
bridge, a constant OFF time PWM current
controller and the decoding logic for single ended
Hall sensors that generates the required
sequence for the power stage. Available in
QFN48 7x7 package, the L6235Q features a non-
dissipative overcurrent protection on the high-side
power MOSFETs and thermal shutdown.
QFN-48
(7 x 7 mm)
Figure 1.
Block diagram
CHARGE
PUMP
VOLTAGE
REGULATOR
HALL-EFFECT
SENSORS
DECODING
LOGIC
THERMAL
PROTECTION
TACHO
MONOSTABLE
OCD1
OCD
OCD
OCD2
10V
5V
VCP
VSA
GATE
LOGIC
VBOOT
VBOOT
OUT1
OUT2
SENSEA
VSB
OUT3
SENSEB
DIAG
EN
FWD/REV
BRAKE
H3
H1
RCPULSE
TACHO
RCOFF
H2
OCD3
ONE SHOT
MONOSTABLE
MASKING
TIME
VBOOT
OCD1
10V
VBOOT
OCD2
10V
VBOOT
OCD3
10V
SENSE
COMPARATOR
+
-
PWM
VREF
AM02555v1
www.st.com


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