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STMicroelectronics |
L6232B
1.5A MAXIMUM PEAK CURRENT
CONTROLLED SLEW RATE
CENTRAL CHARGE PUMP
PWM AND LINEAR MODES
CUTOFF TIME USER CONFIGURABLE
FAST, FREE-WHEELING DIODES ON CHIP
OVER-TEMPERATURE PROTECTION
BRAKE FUNCTION INPUT
DESCRIPTION
The L6232B is a triple half bridge driver intended
for use in brushless DC motor applications. This
part can be used to form the power stage of a
three-phase, brushless DC motor control loop,
and is especially useful for disk drive applications.
Power drivers are Integrated DMOS transistors
and feature fast recirculating diodes as an integral
BLOCK DIAGRAM
SPINDLE DRIVER
ADVANCE DATA
PLCC21+7
ORDERING NUMBER: L6232B
part of their structure. The logic inputs are TTL-
level compatible, with internal pull-up, allowing in-
terfacing to open collector outputs. All necessary
circuitry to perform PWM and linear motor speed
control is included. A central charge pump is util-
ized to drive the upper DMOS transistors, and
also to power the braking function. The L6232B is
packaged in PLCC28.
March 1993
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This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
L6232B
PIN DESCRIPTION
Pin
1 to 4
5, 9
6
7, 11
8
10
12
13
Name
GND
SENSE
INLB
VS
INLA
CS
CP
RC
14
15
16
17
18
19
20
21
22
23
24
25
26 to 28
INLC
BRK DLY
INUC
PWM Vref
LIN Vref
COMP
OUTA
BRK
OUTB
INUA
INUB
OUTC
GND
Function
Common Ground. Also provides heat-sink to PCB.
Output for current sense resistors.
Logic Input to turn on the lower driver (Active High).
Supply Voltage.
Logic input to turn on the lowey driver (Active High).
External Charge Pump Capacitor.
External Main Charge Pump capacitor.
Cutoff Time RC Network in PWM mode. The Resistor value is also used to define
the slew-rate in linear mode (LIN).
Logic input to turn on the lower driver (Active High).
External RC network for the brake delay.
Logic Input to turn on the upper driver (Active Low).
Input for Reference Control in PWM mode
Input for Reference Control voltage in LIN mode
External compensation for error amplifier
DMOS Half-bridge A Out.
Active LOW logic input that triggers the delayed brake.
DMOS Half-bridge B Out.
Logic Input to turn on the upper drivers (Active Low).
Logic Input to turn on the upper drivers (Active Low).
DMOS Half-bridge C Out.
Common Ground. Also provides heat-sink to PCB.
PIN CONNECTION (Top view)
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