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L6225 Schematic ( PDF Datasheet ) - ST Microelectronics

Teilenummer L6225
Beschreibung DMOS DUAL FULL BRIDGE DRIVER
Hersteller ST Microelectronics
Logo ST Microelectronics Logo 




Gesamt 20 Seiten
L6225 Datasheet, Funktion
www.DataSheet4U.com
L6225
DMOS DUAL FULL BRIDGE DRIVER
s OPERATING SUPPLY VOLTAGE FROM 8 TO 52V
s 2.8A OUTPUT PEAK CURRENT (1.4A DC)
s RDS(ON) 0.73TYP. VALUE @ Tj = 25 °C
s OPERATING FREQUENCY UP TO 100KHz
s NON DISSIPATIVE OVERCURRENT
PROTECTION
s PARALLELED OPERATION
s CROSS CONDUCTION PROTECTION
s THERMAL SHUTDOWN
s UNDER VOLTAGE LOCKOUT
s INTEGRATED FAST FREE WHEELING DIODES
TYPICAL APPLICATIONS
s BIPOLAR STEPPER MOTOR
s DUAL OR QUAD DC MOTOR
DESCRIPTION
The L6225 is a DMOS Dual Full Bridge designed for
motor control applications, realized in MultiPower-
BLOCK DIAGRAM
PowerDIP20
(16+2+2)
PowerSO20
SO20
(16+2+2)
ORDERING NUMBERS:
L6225N (PowerDIP20)
L6225PD (PowerSO20)
L6225D (SO20)
BCD technology, which combines isolated DMOS
Power Transistors with CMOS and bipolar circuits on
the same chip. Available in PowerDIP20 (16+2+2),
PowerSO20 and SO20(16+2+2) packages, the
L6225 features a non-dissipative protection of the
high side PowerMOSFETs and thermal shutdown.
VBOOT
VCP
VBOOT
CHARGE
PUMP
OCDA
ENA
IN1A
IN2A
THERMAL
PROTECTION
VOLTAGE
REGULATOR
10V
5V
ENB
IN1B
IN2B
OCDB
OVER
CURRENT
DETECTION
GATE
LOGIC
OVER
CURRENT
DETECTION
GATE
LOGIC
VBOOT
10V
September 2003
VBOOT
VSA
OUT1A
OUT2A
10V
SENSEA
BRIDGE A
BRIDGE B
D99IN1091A
VSB
OUT1B
OUT2B
SENSEB
1/20






L6225 Datasheet, Funktion
L6225
ELECTRICAL CHARACTERISTICS (continued)
(Tamb = 25 °C, Vs = 48V, unless otherwise specified)
Symbol
Parameter
Test Conditions
tdt Dead Time Protection
fCP Charge pump frequency
-25°C<Tj <125°C
Over Current Protection
ISOVER Input Supply Overcurrent
Protection Threshold
Tj = -25°C to 125°C (7)
ROPDR Open Drain ON Resistance
I = 4mA
tOCD(ON) OCD Turn-on Delay Time (9)
I = 4mA; CEN < 100pF
tOCD(OFF) OCD Turn-off Delay Time (9)
I = 4mA; CEN < 100pF
(7) Tested at 25°C in a restricted range and guaranteed by characterization.
(8) See Fig. 1.
(9) See Fig. 2.
Min Typ Max Unit
0.5 1
µs
0.6 1 MHz
2
2.8 3.55
A
40 60
200
100
ns
ns
Figure 1. Switching Characteristic Definition
EN
Vth(ON)
Vth(OFF)
IOUT
90%
10%
D01IN1316
tD(OFF)EN
tFALL
t
tD(ON)EN
tRISE
t
6/20

6 Page









L6225 pdf, datenblatt
L6225
APPLICATION INFORMATION
A typical application using L6225 is shown in Fig. 11. Typical component values for the application are shown
in Table 2. A high quality ceramic capacitor in the range of 100 to 200 nF should be placed between the power
pins (VSA and VSB) and ground near the L6225 to improve the high frequency filtering on the power supply and
reduce high frequency transients generated by the switching. The capacitors connected from the ENA and ENB
inputs to ground set the shut down time for the Brgidge A and Bridge B respectively when an over current is
detected (see Overcurrent Protection). The two current sources (SENSEA and SENSEB) should be connected
to Power Ground with a trace length as short as possible in the layout. To increase noise immunity, unused logic
pins (except ENA and ENB) are best connected to 5V (High Logic Level) or GND (Low Logic Level) (see pin
description). It is recommended to keep Power Ground and Signal Ground separated on PCB.
Table 2. Component Values for Typical Application
C1
100uF
D1
C2
100nF
D2
CBOOT
220nF
RENA
CP
10nF
RENB
CENA
5.6nF
RP
CENB
5.6nF
Figure 11. Typical Application
+
VS
8-52VDC
C1
POWER
GROUND
-
SIGNAL
GROUND
VSA 17
C2 VSB 14
D1
CBOOT
RP VCP
D2 CP
VBOOT
SENSEA
SENSEB
19
12
3
8
LOADA
OUT1A
OUT2A
4
18
LOADB
OUT1B
OUT2B
7
13
1N4148
1N4148
100K
100K
100
ENA RENA
20
CENA
ENB RENB
11
CENB
9 IN1B
10 IN2B
1 IN1A
2 IN2A
16
GND
15
GND
6
GND
5
GND
D02IN1345
ENABLEA
ENABLEB
IN1B
IN2B
IN1A
IN2A
12/20

12 Page





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