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L6225
September 2003 s OPERATING SUPPLY VOLTAGE FROM 8 TO 52V s    2.8A OUTPUT PEAK CURRENT (1.4A DC)s R DS(ON) 0.73Ω TYP. VALUE @ T j  = 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-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.
BLOCK DIAGRAM
DMOS DUAL FULL BRIDGE DRIVER
L6225
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ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter
Test conditions
Value Unit V S Supply Voltage
V SA  = V SB  = V S
60V V OD
Differential Voltage between VS A , OUT1A , OUT2A , SENSE A  and VS B , OUT1B , OUT2B , SENSE B V SA  = V SB  = V S  = 60V;
V SENSEA  = V SENSEB = GND 60
V
V BOOT Bootstrap Peak Voltage
V SA  = V SB  = V S
V S  + 10V V IN ,V EN Input and Enable Voltage Range  -0.3 to +7V V SENSEA, V SENSEB Voltage Range at pins SENSE A  and SENSE B
-1 to +4V 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  < 1ms    3.55
A
I S RMS Supply Current (for each V S  pin)
V SA  = V SB  = V S    1.4A T stg , T OP
Storage and Operating Temperature Range
-40 to 150
°C
Symbol Parameter
Test Conditions
MIN MAX Unit V S Supply Voltage
V SA  = V SB  = V S
8
52V V OD
Differential Voltage Between VS A , OUT1A , OUT2A , SENSE A  and VS B , OUT1B , OUT2B , SENSE B
V SA  = V SB  = V S ;V SENSEA  = V SENSEB 52
V
V SENSEA, V SENSEB Voltage Range at pins SENSE A  and SENSE B (pulsed t W  < t rr )(DC)-6
-1
61V V I OUT RMS Output Current
1.4A T j Operating Junction T emperature -25+125°C f sw
Switching Frequency
100
KHz
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L6225
THERMAL DATA
(5)The slug is internally connected to pins 1,10,11 and 20 (GND pins).
Symbol Description
PowerDIP20
SO20PowerSO20
Unit R th-j-pins MaximumThermal Resistance Junction-Pins 1315-°C/W R th-j-case Maximum Thermal Resistance Junction-Case --2°C/W R th-j-amb1MaximumThermal Resistance Junction-Ambient 1(1)Mounted on a multi-layer FR4 PCB with a dissipating copper surface on the bottom side of 6cm 2 (with a thickness of 35µm).4152-°C/W R th-j-amb1Maximum Thermal Resistance Junction-Ambient 2(2)Mounted on a multi-layer FR4 PCB with a dissipating copper surface on the top side of 6cm 2 (with a thickness of 35µm).
--36°C/W R th-j-amb1MaximumThermal Resistance Junction-Ambient 3(3)Mounted on a multi-layer FR4 PCB with a dissipating copper surface on the top side of 6cm 2 (with a thickness of 35µm), 16 via holes and a ground layer.
--16°C/W R th-j-amb2
Maximum Thermal Resistance Junction-Ambient 4
(4)
Mounted on a multi-layer FR4 PCB without any heat sinking surface on the board.
57
78
63
°C/W
L6225
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(6) Also connected at the output drain of the Overcurrent and Thermal protection MOSFET. Therefore, it has to be driven putting in series a
resistor with a value in the range of 2.2k Ω - 180K Ω, recommended 100k Ω
PIN DESCRIPTION
PACKAGE
Name
Type
Function
SO20/PowerDIP20PowerSO20PIN #PIN #16IN1A Logic Input Bridge A Logic Input 1.27IN2A Logic Input Bridge A Logic Input 2.
38SENSE A Power Supply Bridge A Source Pin. This pin must be connected to Power Ground directly or through a sensing power resistor.49OUT1A Power Output
bootstrappedBridge A Output 1.
5, 6, 15, 16
1, 10, 11,
20
GND
GND
Signal Ground terminals. In PowerDIP and SO packages, these pins are also used for heat dissipation toward the PCB.
712OUT1B Power Output Bridge B Output 1.
813SENSE B Power Supply Bridge B Source Pin. This pin must be connected to Power Ground directly or through a sensing power resistor.914IN1B Logic Input Bridge B Logic Input 1.1015IN2B Logic Input Bridge B Logic Input 2.
11
16
EN B
Logic Input (6)
Bridge B Enable. LOW logic level switches OFF all Power MOSFETs of Bridge B. This pin is also connected to the collector of the Overcurrent and Thermal Protection transistor to implement over current protection.
If not used, it has to be connected to +5V through a resistor.
1217VBOOT Supply Voltage Bootstrap Voltage needed for driving the upper PowerMOSFETs of both Bridge A and Bridge B.1318OUT2B Power Output
Bridge B Output 2.
1419VS B Power Supply Bridge B Power Supply Voltage. It must be connected to
the supply voltage together with pin VS A .172VS A Power Supply Bridge A Power Supply Voltage. It must be connected to the supply voltage together with pin VS B .183OUT2A Power Output
Bridge A Output 2.
194VCP Output Charge Pump Oscillator Output.
20
5
EN A
Logic Input (6)
Bridge A Enable. LOW logic level switches OFF all Power MOSFETs of Bridge A. This pin is also connected to the collector of the Overcurrent and Thermal Protection transistor to implement over current protection.
If not used, it has to be connected to +5V through a resistor.
L6225 ELECTRICAL CHARACTERISTICS
(T amb = 25 °C, V s = 48V, unless otherwise specified)
Unit
Conditions Min Typ Max Symbol Parameter Test
V Sth(ON)Turn-on Threshold  5.8  6.3  6.8V
V Sth(OFF)Turn-off Threshold5  5.56V
510mA
I S Quiescent Supply Current All Bridges OFF;
T j = -25°C to 125°C (7)
T j(OFF)Thermal Shutdown Temperature165°C
Output DMOS Transistors
T j = 25 °C  1.47  1.69Ω
R DS(ON)High-Side + Low-Side Switch ON
Resistance
T j =125 °C (7)  2.35  2.70Ω
I DSS Leakage Current EN = Low; OUT = V S2mA
EN = Low; OUT = GND-0.3mA
Source Drain Diodes
V SD Forward ON Voltage I SD = 1.4A, EN = LOW  1.15  1.3V
t rr Reverse Recovery Time I f = 1.4A300ns
t fr Forward Recovery Time200ns
Logic Input
V IL Low level logic input voltage-0.30.8V
V IH High level logic input voltage27V
I IL Low Level Logic Input Current GND Logic Input Voltage-10µA
I IH High Level Logic Input Current7V Logic Input Voltage10µA
V th(ON)Turn-on Input Threshold  1.8  2.0V
V th(OFF)Turn-off Input Threshold0.8  1.3V
V th(HYS)Input Threshold Hysteresis0.250.5V
Switching Characteristics
t D(on)EN Enable to out turn ON delay time (8)I LOAD =1.4A, Resistive Load500800ns
t D(on)IN Input to out turn ON delay time I LOAD =1.4A, Resistive Load
1.9µs
(dead time included)
t RISE Output rise time(8)I LOAD =1.4A, Resistive Load40250ns
t D(off)EN Enable to out turn OFF delay time (8)I LOAD =1.4A, Resistive Load5008001000ns
t D(off)IN Input to out turn OFF delay time I LOAD =1.4A, Resistive Load5008001000ns
t FALL Output Fall Time (8)I LOAD =1.4A, Resistive Load40250ns
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L6225
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(8)See Fig. 1.(9)
See Fig. 2.
t dt Dead Time Protection 0.5
1µs f CP
Charge pump frequency
-25°C<T j  <125°C
0.6
1
MHz
Over Current Protection ELECTRICAL CHARACTERISTICS  (continued)(T amb  = 25 °C, V s  = 48V, unless otherwise specified)
Symbol Parameter Test Conditions
Min Typ Max Unit

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