IC DRIVER FULL BRIDGE DUAL 24DIP

L6227N

Manufacturer Part NumberL6227N
DescriptionIC DRIVER FULL BRIDGE DUAL 24DIP
ManufacturerSTMicroelectronics
TypeH Bridge
L6227N datasheet
 


Specifications of L6227N

Input TypeNon-InvertingNumber Of Outputs4
On-state Resistance730 mOhmCurrent - Output / Channel1.4A
Current - Peak Output2.8AVoltage - Supply8 V ~ 52 V
Operating Temperature-25°C ~ 125°CMounting TypeThrough Hole
Package / CasePowerSSO-24Operating Supply Voltage8 V to 52 V
Supply Current1.4 AMounting StyleThrough Hole
For Use With497-6817 - EVAL BOARD FOR L6227QLead Free Status / RoHS StatusLead free / RoHS Compliant
Other names497-3648  
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L6227
CIRCUIT DESCRIPTION
POWER STAGES and CHARGE PUMP
The L6227 integrates two independent Power MOS
Full Bridges. Each Power MOS has an Rdson =
0.73ohm (typical value @ 25°C), with intrinsic fast
freewheeling diode. Cross conduction protection is
achieved using a dead time (td = 1 s typical) be-
tween the switch off and switch on of two Power MOS
in one leg of a bridge.
Using N Channel Power MOS for the upper transis-
tors in the bridge requires a gate drive voltage above
the power supply voltage. The Bootstrapped
(VBOOT) supply is obtained through an internal Os-
cillator and few external components to realize a
charge pump circuit as shown in Figure 3. The oscil-
lator output (VCP) is a square wave at 600kHz (typi-
cal) with 10V amplitude. Recommended values/part
numbers for the charge pump circuit are shown in
Table1.
Table 1. Charge Pump External Components
Values
C
220nF
BOOT
C
10nF
P
R
100
P
D1
1N4148
D2
1N4148
Figure 3. Charge Pump Circuit
D1
C
BOOT
D2
R
P
C
P
VCP
VBOOT
VS
VS
A
LOGIC INPUTS
Pins IN1
, IN2
, IN1
and IN2
A
B
B
B
uC compatible logic inputs. The internal structure is
shown in Fig. 4. Typical value for turn-on and turn-off
thresholds are respectively Vthon = 1.8V and Vthoff
= 1.3V.
Pins EN
and EN
have identical input structure with
A
B
the exception that the drains of the Overcurrent and
8/22
thermal protection MOSFETs (one for the Bridge A
and one for the Bridge B) are also connected to these
pins. Due to these connections some care needs to
be taken in driving these pins. The EN
puts may be driven in one of two configurations as
shown in figures 5 or 6. If driven by an open drain
(collector) structure, a pull-up resistor R
pacitor C
driver is a standard Push-Pull structure the resistor
R
and the capacitor C
EN
in Fig. 6. The resistor R
range from 2.2k
for R
EN
More information on selecting the values is found in
the Overcurrent Protection section.
Figure 4. Logic Inputs Internal Structure
Figure 5. EN
V
S
OPEN
COLLECTOR
OUTPUT
Figure 6. EN
D01IN1328
B
PUSH-PULL
are TTL/CMOS and
OUTPUT
A
are connected as shown in Fig. 5. If the
EN
are connected as shown
EN
should be chosen in the
EN
to 180K . Recommended values
and C
are respectively 100K
EN
5V
ESD
PROTECTION
D01IN1329
and EN
Pins Open Collector
A
B
Driving
5V
R
EN
EN
or EN
A
B
C
EN
and EN
Pins Push-Pull Driving
A
B
R
EN
or EN
EN
A
B
C
EN
and EN
in-
B
and a ca-
EN
and 5.6nF.
5V
D02IN1349
5V
D02IN1350