ST L6204 User Manual

L6204

DMOS DUAL FULL BRIDGE DRIVER

■SUPPLY VOLTAGE UP TO 48V

■RDS(ON) 1.2Ω L6204 (25°C)

■CROSS CONDUCTION PROTECTION

■THERMAL SHUTDOWN

■0.5A DC CURRENT

■TTL/CMOS COMPATIBLE DRIVER

■HIGH EFFICIENCY CHOPPING

■MULTIPOWER BCD TECHNOLOGY

DESCRIPTION

The L6204 is a dual full bridge driver for motor control applications realized in BCD technology which combines isolated DMOS power transistors with CMOS and Bipolar circuits on the same chip. By using mixed technology it has been possible to optimize the logic circuitry and the power stage to achieve the best possible performance.

The logic inputs are TTL/CMOS compatible. Both channels are controlled by a separate Enable.

BLOCK DIAGRAM

MULTOPOWER BCD TECHNOLOGY

Powerdip 16+2+2	SO 24+2+2
ORDERING NUMBERS:
L6204	L6204D

Each bridge has a sense resistor to control the currenrt level.

The L6204 is mounted in an 20-lead Powerdip and SO 24+2+2 packages and the four center pins are used to conduct heat to the PCB. At normal operating temperatures no external heatsink is required.

	Vs1	OUT 1 OUT 2	Vs2	OUT 3	OUT 4
VBOOT
IN1					IN4
ENABLE 1					ENABLE 2
IN2					IN3
BOOTSTRAP	CHARGE		THERMAL
OSCILLATOR
	PUMP		SHUT DOWN
		SENSE 1	GND	SENSE 2
July 2003					1/12

L6204

PIN CONNECTIONS

										SENSE1	1	28	VBOOT
										IN1	2	27	IN2
			SENS1	1						ENABLE1	3	26	OUT2
							20		VBOOT		4	25	N.C.
			IN1	2						N.C.
							19		IN2		5	24	N.C.
		ENABLE1		3			18			N.C.
									OUT2		6	23	VS1
			OUT1	4			17			OUT1
									Vs1		7		GND
			GND	5			16			GND		22
									GND
			GND	6			15			GND	8	21	GND
									GND
			OUT3	7			14			OUT3	9	20	VS2
									Vs2
		ENABLE2		8			13			N.C.	10	19	N.C.
									OUT4
			IN3	9			12			N.C.	11	18	N.C.
									IN4
		SENSE2								ENABLE2	12	17	OUT4
						10	11		VCP
							DIP20			IN3	13	16	IN4
						DIP16+2+2				SENSE2	14	15	VCP
											SO24+2+2
											SO24+2+2
	PIN DESCRIPTION
	SO		DIP
	Pin						Symbols				Functions
			Pin
	(*)
	1		1				SENSE 1			Sense resistor to provide the feedback for motor current control of the bridge
										A
	2		2				IN1			Digital input from the motor controller (bridge A)
	3		3				ENABLE 1			A logic level low on this pin disable the bridge A
	6		4				OUT 1			Output of one half bridge of the bridge A
	7		5				GND			Common Power Ground
	8		6				GND			Common Power Ground
	9		7				OUT 3			Ouput of one half bridge of the bridge B
	12		8				ENABLE 2			A logic level low on this pin disable the bridge B
	13		9				IN 3			Digital input from the motor controller (bridge B)
	14		10				SENSE 2			Sense resistor to provide the feedback for motor current control of the bridge B
	15		11		BOOSTRAP OSC. VCP					Oscillator output for the external charge pump
	16		12				IN 4			Digital input from the motor controller (bridge B)
	17		13				OUT 4			Output of one half bridge of the bridge B
	20		14				VS2			Supply voltage bridge B
	21		15				GND			Common Power Ground
	22		16				GND			Common Power Ground
	23		17				VS1			Supply Voltage bridge A
	26		18				OUT 2			Output of one half bridge of the bridge A
	27		19				IN 2			Digital input from the motor controller (bridge A)
	28		20				VBOOT			Overvoltage input for driving of the upper DMOS

(*) For SO package the pins 4, 5, 10, 11, 18, 19, 24 and 25 are not connected.

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L6204

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

VS

Supply Voltage

50

V

VIN, VEN

Input or Enable Voltage Range

-0.3 to +7

V

Io

Pulsed Output Current

3

A

VSENSE

Sensing Voltage

-1 to 4

V

VBOOT

Bootstrap Supply

60

V

Ptot

Total power dissipation: (Tpins = 80°C)

5

W

(Tamb = 70°C no copper area on PCB)

1.23

W

(Tamb = 70°C 8cm2 copper area on PCB)

2

W

Tstg, Tj

Storage and Junction Temperature

-40 to 150

°C

THERMAL DATA

Symbol

Parameter

SO

DIP

Unit

Rth j-pins

Thermal Resistance Junction-pins

Max

16

14

°C/W

Rth j-amb

Thermal Resistance Junction-ambient

Max

73

65

°C/W

ELECTRICAL CHARACTERISTCS

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VS

Supply Voltage

12

48

V

IS

Total Quiescent Current

EN1=EN2=H; IN1=IN2=IN3=IN4=L

10

mA

EN1 = EN2 = L

10

mA

fC

Commutation Frequency

20

KHz

TJ

Thermal Shutdown

150

°C

Td

Dead Time Protection

500

ns

TRANSISTORS

IDSS

Leakage Current

OFF

1

mA

RDS

On Resistance

ON

1.2

Ω

LOGIC LEVELS

VINL, VENL

Input Low Voltage

-0.3

0.8

V

VINH, VENH

Input High Voltage

2

7

V

IINL, IENL

Input Low Current

IN1 = IN2 = IN3 = IN4 = EN1 = EN2

-10

μA

= L

IINH, IENH

Input High Current

IN1 = IN2 = IN3 = IN4 = EN1 = EN2

50

μA

= H

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L6204

APPLICATION DIAGRAM

			A	STEPPER MOTOR
				B
Vs
C1	Vs1	OUT1	OUT2	Vs2	OUT3	OUT4
	D1
	VBOOT
	IN1					IN4
	ENABLE1					ENABLE 2
	IN2					IN3
	CHARGE			THERMAL
	PUMP			SHUT DOWN
	BOOTSTRAP		SENSE1	GND	SENSE2
	OSCILLATOR		SENSE1	SENSE2
D2	C2		RS1		RS2

CIRCUIT DESCRIPTION

L6204 is a dual full bridge IC designed to drive DC motors, stepper motors and other inductive loads. Each bridge has 4 power DMOS transistor with RDSon = 1.2Ω and the relative protection and control circuitry. (see fig. 3)

The 4 half bridges can be controlled independently by means of the 4 inputs IN!, IN2, IN3, IN4 and 2 enable inputs ENABLE1 and ENABLE2.

External connections are provided so that sensing resistors can be added for constant current chopper applications.

LOGIC DRIVE (*)

	INPUTS
		IN1	IN2	OUTPUT MOSFETS
		IN3	IN4
		L	L	Sink 1, Sink 2
EN1=EN2=H
		L	H	Sink 1, Source 2
		H	L	Source 1, Sink 2
		H	H	Source 1, Source 2
EN1=EN2=L		X	X	All transistor turned OFF

L = Low H = High X = Don’t care

(*) True table for the two full bridges

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