Datasheet L6451 Datasheet (SGS Thomson Microelectronics)

L6451

28 CHANNEL INK JET DRIVER

ADVANCE DATA

40VDMOS OUTPUTBREAKDOWN
PRECISEOUTPUTENERGY
ESD OUTPUT PROTECTION WITH CLAMP-

ING DIODES
VERYLOW QUIESCENTCURRENT
PLCC44 OR PQFP44(10 x 10mm)

DESCRIPTION

The L6451 is realized in Multipower BCD Tech­nology which combines isolated DMOS power
transistors with CMOS and Bipolar circuits on the
same IC. By using mixed technology it has been
possible to optimize the logic circuitry and the
powerstage to achieve the best possible perform­ances.

Intended to be used in ink jet Printer Applications
as 4 to 28 (2 x 14)lines selectable decoder/driver,
the L6451 device driver has the advantages of
low power CMOS inputs and logic, with 28 high
current and high voltage DMOS outputs capable
of sustaining a maximum of 40V.
On systempower up the output drivers are locked
out using the chip enable function; two enable in­puts areavailable for the differentdriver banks.

MULTIPOWER BCD TECHNOLOGY

PQFP44 PLCC44

An internal power-on system is implemented in
order to avoid wrong output commutation during
the supply voltage transients.
Using a mask option during manufacturing allows
a differentdecoding.
Control of the energy delivered to the print head
ismade by means of a specialcircuitry.
All driver outputs are capable of withstanding a
contactdischargeof ±8kV with the ICbiased.

BLOCK DIAGRAM (case of 4 bit)

May 1995

This is advanced information on a new product now in developmentor undergoing evaluation. Details are subject to change without notice.

1/9

L6451

PLCC44PIN CONNECTION (Top view)

PQFP44PIN CONNECTION (Top view)

2/9

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

CLAMP

I

I

PEAK

V

V

T

T

OUT

OUT

T

DD

IN

amb

stg

J

Output Voltage 40 V
Output Clamping Voltage 40 V
Output Continuous Current 0.8 A
Output Peak Current (with duty cycle = 10% TON=4µs) 2 A
JunctionTemperature 150 °C
LogicSupply Voltage 7 V
InputVoltage Range -0.3V to VS+0.3 V
Operating Temperature Range 0 to 70 °C
Storage Temperature Range -55 to 150 °C

PIN FUNCTIONS

Name Function

V

DD

GND Logic and Power Ground.

OUT0 to OUT27 DMOS Outputs.

CLAMP This pin has to be connected to the power supply voltage of the head resistors. Each ofthe

INA, INB, INC, IND Decoder inputs.

COM1, COM2 A low logic input on these pins enables the outputs selected by the decoder inputs.
CHIP ENABLE A logic high enable the chip.

5V Logic Supply.

output DMOS have their drain connected with the anode of a protection diode, all the cathodes
of the protection diodes are connected to the clamp pin. In order to have thedevice supplied,
the CLAMP pin needs to be connected to the power..

L6451

THERMAL DATA

Symbol Parameter PQFP44 PLCC44 Unit

R

th j-amb

(*) device mountedon PCB.

Thermal Resistance Junction-Ambient Max. 55 (*) 65 (*) °C/W

3/9

L6451

D.C. ELECTRICAL CHARACTERISTICS atT

=25°C, VDD=5V,V

amb

=18V( unless otherwisespecified) .

clamp

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

V

CLAMP

V

I

DD

V

IL

IH

I

LL

I

LH

DD

Logic Supply Voltage 4.75 5 5.25 V
Clamping Voltage 9 38 V
Low Level Input Voltage 1.2 V
High Level Input Current VDD-1.2 V
Low Level Input Current VIN=V
High Level Input Current VIN=V

IL
IH

Logic Supply Current (Independent from the output

-200 µA
10 µA

5mA

conditions)

V

OUT

∆V

CE

Output Saturation Voltage Tj 25 °C D.C. 0.4A

Tj 25 °C D.C. 0.5A
Tj 90 °C D.C. 0.4A
Tj 90 °C D.C. 0.5A

Output saturation absolute
voltage variationaround the

Tj = 25°Cto90°C D.C.: 0.4A
Tj = 25°Cto90°C D.C.: 0.5A

0.9

1.1

1.4

1.7

±0.2

±0.25

typ. values for extended
temperature ranges

R

ON 2.2 Ω

DS

A.C. ELECTRICAL CHARACTERISTICS at T

=25°C, VDD=5V.

amb

Symbol Signal Name Parameter Test Condition Min. Typ. Max. Unit

T

S

INA, INB, INC,

SET - UP Time 30 ns

IND Vs COMn

T

H

INA, INB, INC,

HOLD Time 0 ns

IND Vs COMn

T

T

T

∆P

on

off

t
t

wout

r
f

D

COM1,2,3,4

V

OUT 0 to N

S

COM1,2,3,4

V

OUT 0 to N

S

TURN - ON Time I

TURN - OFF Time I

= 0.5A, RL=39Ω

OUT

T

=25to90°C

j

= 0.5A, RL=39Ω

OUT

T

=25to90°C

j

150 ns

150 ns

Rise Time 100 ns
Fall Time 100 ns
Output Pulse Width T

Maximum allowable
variation of the output

= 3.5µsRL=40Ω

win

I

= 0.5A

OUT

R

=39Ω

L

V

= 18V

CLAMP

-20 T

win

+80 ns

±4%

powertransmitted by
eachdriver to the
resistive load

∆P

D

Maximum
allowable

R
V

L
clamp

=40Ω

= 18V

æ4 %

variation of
the output
power
transmitted
by each
driver to the
resistive load

V
V
V
V

V
V

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Figure1: Timing Waveforms

L6451

OUTPUTSELECTION

Decoder Truth Table

IND INC INB

0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1

INA

(LSB)

0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1

OUTPUTS

0.27

1.26

2.25

3.24

4.23

5.22

6.21

7.20

8.19

9.18

10.17

11.16

12.15

13.14
ALL OFF
ALL OFF

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L6451

Figure2: ApplicationCircuit

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications men­tioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without ex­press written approval of SGS-THOMSON Microelectronics.

 1993 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved

SGS-THOMSON Microelectronics GROUP OF COMPANIES

Australia - Brazil - France - Germany - Hong Kong- Italy - Japan - Korea - Malaysia - Malta -Morocco - The Netherlands -

Singapore - Spain - Sweden - Switzerland - Taiwan - United Kingdom - U.S.A.

6/9

PQFP44(14 x 14) PACKAGEMECHANICAL DATA

L6451

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 3.40 0.134
A1 0.25 0.0098
A2 2.55 2.80 3.05 0.100 0.110 0.120

B 0.35 0.50 0.0138 0.0197

C 0.13 0.23 0.005 0.009

D 16.95 17.20 17.45 0.667 0.677 0.687
D1 13.90 14.00 14.10 0.547 0.551 0.555
D3 10.00 0.394

e 1.00 0.039

E 16.95 17.20 17.45 0.667 0.677 0.687
E1 13.90 14.00 14.10 0.547 0.551 0.555
E3 10.00 0.394

L 0.65 0.80 0.95 0.025 0.0315 0.0374

L1 1.60 0.063

K 0°(min.), 7°(max.)

D

D1

33

34

B

44

1

e

23

11

PQFP44

22

L1

E

L

E3D3E1

12

0.10mm
.004

Seating Plane

K

A

A2

A1

B

C

7/9

L6451

PLCC44PACKAGE MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 17.4 17.65 0.685 0.695

B 16.51 16.65 0.650 0.656
C 3.65 3.7 0.144 0.146
D 4.2 4.57 0.165 0.180

d1 2.59 2.74 0.102 0.108
d2 0.68 0.027

E 14.99 16 0.590 0.630

e 1.27 0.050

e3 12.7 0.500

F 0.46 0.018

F1 0.71 0.028

G 0.101 0.004
M 1.16 0.046

M1 1.14 0.045

mm inch

8/9

L6451

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or otherrights of third parties which may result from itsuse. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications men­tioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without ex­press written approval of SGS-THOMSON Microelectronics.

 1995 SGS-THOMSON Microelectronics - All RightsReserved

Australia - Brazil- France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore -

SGS-THOMSON Microelectronics GROUP OF COMPANIES

Spain - Sweden - Switzerland - Taiwan - Thaliand- United Kingdom - U.S.A.

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