Sharp FO-2150CM Manuel technique - Page 23

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Sharp FO-2150CM Manuel technique
3. 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 power stage to achieve the best possible performances.
Intended to be used in ink jet Printer Applications as 4 to 28 (2x14) lines selectable decoder/driver,the L6451 device
driver has the advantages of low power CMOS input and logic, with 28 high current and high voltage DMOS outputs
capable of sustaining a maximum of 40V.
On system power up the output drivers are locked out using the chip enable function : two enable inputs are
available for the different driver banks.
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 different decoding.
Control of the energy delivered to the print head is made by means of a special circuitry.
All driver outputs are capable of withstanding a contact discharge of ±8kV with the IC biased.
4. Absolute Maximum Ratings
Symbol
VOUT
VCLAMP
IOUT
IPEAK
TJ
VDD
VIN
TAMB
TSTG
5. Pin Functions
Name
VDD
GND
OUT0 to OUT27
CLAMP
INA, INB, INC, IND
COM1, COM2
CHIP ENABLE
Parameter
Output voltage
Output Clamping Voltage
Output Continuous Current
Output Peak Current (with duty cycle = 10% TON = 4µs)
Junction Temperature
Logic Supply Voltage
Input Voltage Range
Operating Temperature Range
Storage Temperature Range
5V Logic Supply.
Logic and Power Ground.
DMOS Output.
This pin has to be connected to the power supply voltage of the head resistors.
Each of the 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 the device supplied, the CLAMP pin needs to be connected to the power.
Decoder inputs.
A low logic input on these pins enables the outputs selected by the decoder inputs.
A logic high enable the chip.
Function
22
–
–
UX-2200CMU/CMC
FO-2150CMU/CMC
Value
Unit
40
V
40
V
0.8
A
2
A
150
°C
7
V
-0.3V to Vs +0.3
V
0 to 70
°C
-55 to 150
°C