ST L6225 User Manual

DMOS DUAL FULL BRIDGE DRIVER

■

OPERATING SUPPLY VOLTAGE FROM 8 TO 52V

■ 2.8A OUTPUT PEAK CURRENT (1.4A DC) ■ R ■ OPERATING FREQUENCY UP TO 100KHz ■ NON DISSIPATIVE OVERCURRENT

PROTECTION

■

PARALLE LED OPERATION

■ CROSS CONDUCTION PROTECTION ■ THERMAL SHUTDOWN ■ UNDER VOLTAGE LOCKOUT ■

INTEGRATED FAST FREE WHEELING DIODES

TYPICAL APPLICATIONS

■ BIPOLAR STEPPER MOTOR ■ DUAL OR QUAD DC MOTOR

DESCRIPTION

The L6225 is a DMOS Dual Full Bridge designed for motor control applications, realized in MultiPower-

0.73Ω TYP. VALUE @ Tj = 25 °C

DS(ON)

L6225

PowerDIP20

(16+2+2)

BCD technology, which combines isolated DMOS Power Transistors with CMOS and bipolar c ir cuits 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.

PowerSO20

ORDERING NUMBERS:

L6225N (PowerDIP 20) L6225PD (PowerSO20) L6225D (SO20)

SO20

(16+2+2)

BLOCK DIAGRAM

VBOOT

VCP

EN IN1 IN2

A A A

B B B

V

BOOT

CHARGE

PUMP

VOLTAGE

REGULA TOR

OCD

THERMAL

PROTECTION

10V 5V

OCD

VS

V

BOOT

OVER

A

B

CURRENT

DETECTION

GA TE

LOGIC

OVER

CURRENT

DETECTION

GA TE

LOGIC

10V 10V

V

BOOT

BRIDGE A

BRIDGE B

A

OUT1 OUT2

SENSE

V

S

B

OUT1 OUT2 SENSE

A A

A

B B

B

September 2003

D99IN1091A

1/20

L6225

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Test conditions Value Unit

V

S

V

OD

V

BOOT

V

IN,VEN

V

SENSEA,

V

SENSEB

I

S(peak)

Supply Voltage Differential Voltage between

VSA, OUT1A, OUT2A, SENSEA and VSB, OUT1B, OUT2B, SENSE

Bootstrap Peak Voltage Input and Enable Voltage Range -0.3 to +7 V Voltage Range at pins SENSEA

and SENSE

B

Pulsed Supply Current (for each

pin), internally limited by the

V

S

VSA =

VSB = V

VSA =

VSB = VS = 60V;

V

SENSEA

B

VSA =

VSB = V

= V

S

SENSEB

S

= GND

60 V 60 V

VS + 10 V

-1 to +4 V

VSA = t

PULSE

VSB = VS;

< 1ms

3.55 A

overcurrent protection

I

S

, T

T

stg

RMS Supply Current (for each

pin)

V

S

Storage and Operating

OP

VSA =

VSB = V

S

1.4 A

-40 to 150 °C

Temperature Range

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Test Conditions MIN MAX Unit

V

OD

V

SENSEA,

V

SENSEB

I

OUT

T

f

sw

Supply Voltage

S

Differential Voltage Between VSA, OUT1A, OUT2A, SENSEA and VSB, OUT1B, OUT2B, SENSE

Voltage Range at pins SENSEA and SENSE

B

VSA = VSA =

V

SENSEA

B

(pulsed tW < trr) (DC)

VSB = V VSB = VS;

= V

SENSEB

S

852V

-6

-1 RMS Output Current 1.4 A Operating Junction Temperature -25 +125 °C

j

Switching Frequency 100 KHz

52 V

6 1

V V

2/20

L6225

THERMA L D ATA

Symbol Description PowerDIP20 SO20 PowerSO20 Unit

R

th-j-pins

R

th-j-case

R

th-j-amb1

R

th-j-amb1

R

th-j-amb1

R

th-j-amb2

(1) Mounted on a multi-layer FR4 PCB with a dissipati ng copper surface on the bottom side of 6cm2 (with a thickness of 35µm). (2) Mounted on a multi-layer FR4 PCB with a dissipati ng copper surface on the top side of 6cm2 (with a thic kness of 35µm ). (3) Mounted on a multi-layer FR4 PCB with a dissipating copper surface on the top side of 6cm2 (with a thickness of 35µm), 16 via holes

and a groun d l ayer.

(4) Mounted on a multi-layer FR4 PCB without any hea t s i nking surfac e on the board.

PIN CONNECTIONS (Top View)

MaximumThermal Resistance Junction-Pins 13 15 - °C/W Maximum Thermal Resistance Junction-Case - - 2 °C/W

MaximumThermal Resistance Junction-Ambient Maximum Thermal Resistance Junction-Ambient MaximumThermal Resistance Junction-Ambient Maximum Thermal Resistance Junction-Ambient

1

2

3

4

41 52 - °C/W

--36°C/W

--16°C/W

57 78 63 °C/W

IN1 IN2

SENSE

OUT1

GND GND GND

OUT1

SENSE

IN1 IN2

1

A

2

A

3

A

4

A

5 6 7

B

8

B

9

B

10

B

D99IN1093A

20 19 18 17 16

14 13 12 11

EN

A

VCP OUT2 VS

A

GND15 VS

B

OUT2 VBOOT EN

B

GND GND

VS

A

OUT2

VCP

EN IN1 IN2

B

SENSE

OUT1

GND

PowerDIP20/SO20

(5) The slug is internally connected to pins 1,10,11 and 20 (GND pins).

1

A A

2 3 4

A A A A A

5 6 7 8 9

D99IN1092A

PowerSO20

(5)

20 19 18 17 16 15 14 13 12 11

VS

B

OUT2 VBOOT EN

B

IN2

B

IN1

B

SENSE OUT1 GND10

B

3/20

L6225

PIN DESCRIPTION

PACKA GE

SO20/

PowerDIP20

PowerSO20

Name Type Function

PIN # PIN #

1 6 IN1 2 7 IN2 3 8 SENSE

A

Logic Input Bridge A Logic Input 1. Logic Input Bridge A Logic Input 2.

Power Supply Bridge A Source Pin. This pin must be connected to Power

A

Ground directly or through a sensing power resistor.

4 9 OUT1

5, 6, 15, 16 1, 10, 11,

20

GND GND Signal Ground terminals. In PowerDIP and SO packages,

Power Output Bridge A Output 1.

A

these pins are also used for heat dissipation toward the

PCB. 7 12 OUT1 8 13 SENSE

Power Output Bridge B Output 1.

B

Power Supply Bridge B Source Pin. This pin must be connected to Power

B

Ground directly or through a sensing power resistor. 9 14 IN1

10 15 IN2 11 16 EN

B

Logic Input Bridge B Logic Input 1. Logic Input Bridge B Logic Input 2.

(6)

Logic Input

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.

12 17 VBOOT Supply

Voltage 13 18 OUT2 14 19 VS

Power Output Bridge B Output 2.

B

Power Supply Bridge B Power Supply Voltage. It must be connected to

B

Bootstrap Voltage needed for driving the upper PowerMOSFETs of both Bridge A and Bridge B.

the supply voltage together with pin VS

17 2 VS

Power Supply Bridge A Power Supply Voltage. It must be connected to

A

the supply voltage together with pin VS

18 3 OUT2

Power Output Bridge A Output 2.

A

19 4 VCP 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.

.

A

.

B

(6) Also connect ed at the output dra i n o f the Overcurren t and Thermal prot ection MOSF E T . Therefore, it has to be driven putting in series a

resistor with a value in the range of 2.2kΩ - 180K Ω , recommend e d 100kΩ

4/20

L6225

ELECTRICAL CHARACTERISTICS

(T

= 25 °C, Vs = 48V, unless otherwise specified)

amb

Symbol Parameter Test Conditions Min Typ Max Unit

V

Sth(ON)

V

Sth(OFF)

T

j(OFF)

Turn-on Threshold 5.8 6.3 6.8 V Turn-off Threshold 5 5.5 6 V

I

Quiescent Supply Current All Bridges OFF;

S

Thermal Shutdown Temperature 165 °C

Output DMOS Transistors

R

DS(ON)

High-Side + Low-Side Switch ON Resistance

I

DSS

Leakage Current EN = Low; OUT = V

Source Drain Diodes

V

Forward ON Voltage ISD = 1.4A, EN = LOW 1.15 1.3 V

SD

t

Reverse Recovery Time If = 1.4A 300 ns

rr

Forward Recovery Time 200 ns

t

fr

Logic Input

V

Low level logic input voltage -0.3 0.8 V

IL

= -25°C to 125°C

T

j

(7)

Tj = 25 °C 1.47 1.69 Ω

510mA

=125 °C

T

j

(7)

S

2.35 2.70 Ω

2mA

EN = Low; OUT = GND -0.3 mA

V

th(ON)

V

th(OFF)

V

th(HYS)

High level logic input voltage 2 7 V

IH

I

Low Level Logic Input Current GND Logic Input Voltage -10 µA

IL

I

High Level Logic Input Current 7V Logic Input Voltage 10 µA

IH

Turn-on Input Threshold 1.8 2.0 V Turn-off Input Threshold 0.8 1.3 V Input Threshold Hysteresis 0.25 0.5 V

Switching Characteristics

t

D(on)EN

t

D(on)IN

t

RISE

t

D(off)EN

t

D(off)IN

t

FALL

Enable to out turn ON delay time Input to out turn ON delay time I

Output rise time Enable to out turn OFF delay time

Input to out turn OFF delay time

Output Fall Time

(8)

I

=1.4A, Resistive Load 500 800 ns

LOAD

=1.4A, Resistive Load

LOAD

(dead time included)

I

=1.4A, Resistive Load 40 250 ns

LOAD

(8)

I

=1.4A, Resistive Load 500 800 1000 ns

LOAD

I

=1.4A, Resistive Load 500 800 1000 ns

LOAD

I

=1.4A, Resistive Load 40 250 ns

LOAD

1.9 µs

5/20

L6225

ELECTRICAL CHARACTERISTICS (continued)

(T

= 25 °C, Vs = 48V, unless otherwise specified)

amb

Symbol Parameter Test Conditions Min Typ Max Unit

t

Dead Time Protection 0.5 1 µs

dt

f

CP

Charge pump frequency

-25°C<Tj <125°C 0.6 1 MHz

Over Current Protection

I

SOVER

R

OPDR

t

OCD(ON)

t

OCD(OFF)

(7) Tested at 25°C in a restricted range and guaranteed by characterization. (8) See Fig. 1. (9) See Fig. 2.

Input Supply Overcurrent Protection Threshold

= -25°C to 125°C

T

j

Open Drain ON Resistance I = 4mA 40 60 Ω OCD Turn-on Delay Time (9) I = 4mA; CEN < 100pF 200 ns OCD Turn-off Delay Time (9) I = 4mA; CEN < 100pF 100 ns

Figure 1. Switching Characteristic Definition

EN

V

th(ON)

V

th(OFF)

I

OUT

(7)

2 2.8 3.55 A

t

6/20

90%

10%

D01IN1316

t

D(OFF)EN

t

FALL

t

D(ON)EN

t

RISE

t