L6235 Datasheet, PDF (1/25 Pages) STMicroelectronics – DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR

L6235
DMOS DRIVER FOR
THREE-PHASE BRUSHLESS DC MOTOR
s OPERATING SUPPLY VOLTAGE FROM 8 TO 52V
s 5.6A OUTPUT PEAK CURRENT (2.8A DC)
s R_DS(ON) 0.3Ω TYP. VALUE @ T_j = 25 °C
s OPERATING FREQUENCY UP TO 100KHz
s NON DISSIPATIVE OVERCURRENT
DETECTION AND PROTECTION
s DIAGNOSTIC OUTPUT
s CONSTANT t_OFF PWM CURRENT CONTROLLER
s SLOW DECAY SYNCHR. RECTIFICATION
s 60° & 120° HALL EFFECT DECODING LOGIC
s BRAKE FUNCTION
s TACHO OUTPUT FOR SPEED LOOP
s CROSS CONDUCTION PROTECTION
s THERMAL SHUTDOWN
s UNDERVOLTAGE LOCKOUT
s INTEGRATED FAST FREEWEELING DIODES
DESCRIPTION
The L6235 is a DMOS Fully Integrated Three-Phase
Motor Driver with Overcurrent Protection.
Realized in MultiPower-BCD technology, the device
PowerDIP24
(20+2+2)
PowerSO36
ORDERING NUMBERS:
L6235N
L6235PD
SO24
(20+2+2)
L6235D
combines isolated DMOS Power Transistors with
CMOS and bipolar circuits on the same chip.
The device includes all the circuitry needed to drive a
three-phase BLDC motor including: a three-phase
DMOS Bridge, a constant off time PWM Current Con-
troller and the decoding logic for single ended hall
sensors that generates the required sequence for the
power stage.
Available in PowerDIP24 (20+2+2), PowerSO36 and
SO24 (20+2+2) packages, the L6235 features a non-
dissipative overcurrent protection on the high side
Power MOSFETs and thermal shutdown.
BLOCK DIAGRAM
VBOOT
VCP
DIAG
EN
BRAKE
FWD/REV
H₃
H₂
H₁
V_BOOT
CHARGE
PUMP
THERMAL
PROTECTION
OCD
OCD1
OCD2
OCD3
OCD
HALL-EFFECT
SENSORS
DECODING
LOGIC
GATE
LOGIC
V_BOOT
OCD1
10V
V_BOOT
OCD2
10V
V_BOOT
VS_A
OUT1
OUT2
SENSE_A
VS_B
RCPULSE
TACHO
TACHO
MONOSTABLE
10V 5V
VOLTAGE
REGULATOR
OCD3
10V
OUT3
ONE SHOT
MONOSTABLE
PWM
MASKING
TIME
+
SENSE
-
COMPARATOR
SENSE_B
VREF
RCOFF
D99IN1095B
September 2003
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