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L6227QTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27
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.
VFQFPN32 5 mm x 5 mm
www.st.com
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
5V10V
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
Contents L6227Q
2/27
Contents
1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Power stages and charge pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Logic inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 PWM current control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.5 Slow decay mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6 Non-dissipative overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.7 Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Output current capability and IC power dissipation . . . . . . . . . . . . . . 21
7 Thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
L6227Q Electrical data
3/27
1 Electrical data
1.1 Absolute maximum ratings
1.2 Recommended operating conditions
Table 1. Absolute maximum ratings
Symbol Parameter Parameter Value Unit
V
S
Supply voltage
V
SA
=
V
SB
=
V
S
60 V
V
OD
Differential voltage between
VS
A
, OUT1
A
, OUT2
A
, SENSE
A
and
VS
B
, OUT1
B
, OUT2
B
, SENSE
B
V
SA
=
V
SB
=
V
S
= 60 V;
V
SENSEA
= V
SENSEB
= GND
60 V
V
BOOT
Bootstrap peak voltage
V
SA
=
V
SB
=
V
S
V
S
+ 10 V
V
IN
,V
EN
Input and enable voltage range -0.3 to +7 V
V
REFA
, V
REFB
Voltage range at pins V
REFA
and
V
REFB
-0.3 to +7 V
V
RCA,
V
RCB
Voltage range at pins RC
A
and RC
B
-0.3 to +7 V
V
SENSEA,
V
SENSEB
Voltage range at pins SENSE
A
and
SENSE
B
-1 to +4 V
I
S(peak)
Pulsed supply current (for each V
S
pin), internally limited by the
overcurrent protection
V
SA
=
V
SB
=
V
S
;
t
PULSE
< 1 ms
3.55 A
I
S
RMS supply current (for each V
S
pin)
V
SA
=
V
SB
=
V
S
1.4 A
T
stg
, T
OP
Storage and operating temperature
range
-40 to 150 ° C
Table 2. Recommended operating conditions
Symbol Parameter Parameter Min Max Unit
V
S
Supply voltage
V
SA
=
V
SB
=
V
S
852V
V
OD
Differential voltage between
VS
A
, OUT1
A
, OUT2
A
, SENSE
A
and
VS
B
, OUT1
B
, OUT2
B
, SENSE
B
V
SA
=
V
SB
=
V
S
;
V
SENSEA
= V
SENSEB
52 V
V
REFA
, V
REFB
Voltage range at pins V
REFA
and
V
REFB
-0.1 5 V
V
SENSEA,
V
SENSEB
Voltage range at pins SENSE
A
and
SENSE
B
(pulsed t
W
< t
rr
)
(DC)
-6
-1
6
1
V
V
I
OUT
RMS output current 1.4 A
T
J
Operating junction temperature -25 +125 °C
f
sw
Switching frequency 100 kHz
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27

L6227QTR

Mfr. #:
Buy L6227QTR
Manufacturer:
STMicroelectronics
Description:
Gate Drivers Bridge w/ PWM
Lifecycle:
New from this manufacturer.
Delivery:
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