STMicroelectronics Demonstration board using a dual full-bridge L6227Q EVAL6227QR EVAL6227QR Data Sheet
Product codes
EVAL6227QR
January 2009
Rev 3
1/27
27
L6227Q
DMOS dual full bridge driver
with PWM current controller
Features
■
Operating supply voltage from 8 to 52 V
■
2.8 A output peak current (1.4 A DC)
■
R
DS(on)
0.73
Ω typ. value @
T
J
= 25 °C
■
Operating frequency up to 100 kHz
■
Non dissipative overcurrent protection
■
Dual independent constant t
OFF
PWM current
controllers
■
Slow decay synchronous rectification
■
Cross conduction protection
■
Thermal shutdown
■
Under voltage lockout
■
Integrated fast free wheeling diodes
Applications
■
Bipolar stepper motor
■
Dual or quad DC motor
Description
The L6227Q is a DMOS dual full bridge designed
for motor control applications, realized in
BCDmultipower technology, which combines
isolated DMOS power transistors with CMOS and
bipolar circuits on the same chip. The device also
includes two independent constant off time PWM
current controllers that performs the chopping
regulation. Available in VQFPN32 5 mm x 5 mm
package, the L6227Q features a non-dissipative
overcurrent protection on the high side power
MOSFETs and thermal shutdown.
for motor control applications, realized in
BCDmultipower technology, which combines
isolated DMOS power transistors with CMOS and
bipolar circuits on the same chip. The device also
includes two independent constant off time PWM
current controllers that performs the chopping
regulation. Available in VQFPN32 5 mm x 5 mm
package, the L6227Q features a non-dissipative
overcurrent protection on the high side power
MOSFETs and thermal shutdown.
VFQFPN32 5 mm x 5 mm
Figure 1.
Block diagram
D99IN1085A
GATE
LOGIC
OCD
A
OCD
B
OVER
CURRENT
DETECTION
OVER
CURRENT
DETECTION
GATE
LOGIC
VCP
VBOOT
EN
A
IN1
A
IN2
A
EN
B
IN1
B
IN2
B
VREF
A
V
BOOT
5V
10V
VS
A
V
S
B
OUT1
A
OUT2
A
OUT1
B
OUT2
B
SENSE
A
CHARGE
PUMP
VOLTAGE
REGULATOR
ONE SHOT
MONOSTABLE
MASKING
TIME
THERMAL
PROTECTION
V
BOOT
V
BOOT
10V
10V
BRIDGE A
SENSE
COMPARATOR
BRIDGE B
RC
A
+
-
SENSE
B
VREF
B
RC
B
PWM