ucn5829 Allegro MicroSystems, Inc., ucn5829 Datasheet

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ucn5829

Manufacturer Part Number
ucn5829
Description
9-bit Serial-input, Latched Sink Driver
Manufacturer
Allegro MicroSystems, Inc.
Datasheet

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GND
GND
Output Current Voltage, V
Output Current, I
Logic Supply Voltage, V
Input Voltage Range,
Package Power Dissipation,
Operating Temperature Range,
Junction Temperature, T
Storage Temperature Range,
* Fault conditions that produce excessive junction
temperature will activate device thermal shut-
down circuitry. These conditions can be
tolerated, but should be avoided.
Caution: This CMOS device has input static
protection but is susceptible to damage when
exposed to extremely high static electrical
charges.
10
11
12
13
14
15
16
17
7
8
9
(Continuous) ................................ 1.6 A
(Peak) ............................................ 1.8 A
V
P
T
T
A
S
IN
D
NC
ONE-SHOT
........................................ See Graph
.................................. -20 C to +85 C
............................... -55 C to +150 C
....................... -0.3 V to V
V
DD
OUT(S)
SHIFT REGISTER
LATCHES
CLK
DD
J
............... +150 C*
OUT
.................. 7.0 V
............ 50 V
CURRENT
CONTROL
DD
NC
+ 0.3 V
Dwg. PP-028A
39
38
37
36
35
34
33
32
31
30
29
GND
GND
5829
printer solenoids, the UCN5829EB serial-input, latched sink driver
provides a complete driver function with a minimum external parts
count. Included on chip are constant-frequency PWM current control
for each output driver, a user-defined output enable timeout, current
sensing, and thermal shutdown.
most microprocessor/LSI-based systems. With a 5 V logic supply,
these BiMOS devices will operate at data input rates greater than 3.3
MHz. The CMOS inputs cause minimum loading and are compatible
with standard CMOS, PMOS, NMOS, and TTL circuits. A CMOS serial
data output allows cascade connections in applications requiring
additional drive lines as required for 24-wire printheads.
rated at 50 V and 1.6 A. Current-control for each output is provided by
an internal current-sensing resistor and a constant-frequency chopper
circuit. An external high-side driver can be used to optimize print head
performance. It is enabled by an on-chip driver during the output
enable timeout. Internal logic sequencing prevents false output
operation during power up. Other high-current devices for driving dot
matrix printheads are the UDN2961B/W and UDN2962W.
batwing construction provides for maximum package power dissipation
in a minimum-area, surface-mountable package.
Always order by complete part number: UCN5829EB .
1.6 A Continuous Output Current
50 V Minimum Sustaining Voltage
Internal Current Sensing
Constant-Frequency PWM Current Control
Control for External High-Side Driver
To 3.3 MHz Data Input Rate
Low-Power CMOS Logic & Latches
Internal Pull-Ups for TTL Compatibility
User-Defined Output Enable Timeout
Internal Thermal Shutdown Circuitry
Intended primarily to drive high-current, dot matrix 9- and 24-wire
The 9-bit CMOS shift register and latches allow operation with
The device features nine open-collector Darlington drivers, each
The UCN5829EB is supplied in a 44-lead power PLCC. Its
LATCHED SINK DRIVER
9-BIT SERIAL-INPUT,

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ucn5829 Summary of contents

Page 1

... Dwg. PP-028A operation during power up. Other high-current devices for driving dot matrix printheads are the UDN2961B/W and UDN2962W. The UCN5829EB is supplied in a 44-lead power PLCC. Its batwing construction provides for maximum package power dissipation in a minimum-area, surface-mountable package. 1.6 A Continuous Output Current ...

Page 2

... LEVEL CHOP INHIBIT CONTROL DRIVER TWO OF NINE DRIVERS 29-39 12.5 10 7.5 5.0 2 TEMPERATURE IN C 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1991, 1995 Allegro MicroSystems, Inc REF OUT – <<1 Dwg. FP-015A 75 ...

Page 3

IN Characteristic Output Power Drivers (OUT through OUT 1 Output Leakage Current Output Saturation Voltage Output Sustaining Voltage Control Logic HSD Output Saturation Voltage Logic Input Voltage Logic Input Current Reference Input Current Logic Supply Current (V = 2.0 V) ...

Page 4

SERIAL-INPUT, LATCHED SINK DRIVER Characteristic Chopping Characteristics ( +150 C) with Fast Clamp Diodes J Enable Timeout Chopping Frequency Duty Cycle Range Chop Current Level Output Current Control Range Delay Chop Inhibit Voltage Range ...

Page 5

V CHARGE PUMP HIGH-SIDE DRIVER (HSD) V REF STROBE CLOCK SERIAL DATA IN Serial Shift Register Data Clock Contents* Input Input I I … … … ...

Page 6

SERIAL-INPUT, LATCHED SINK DRIVER CLOCK DATA IN STROBE HIGH-SIDE DRIVER OUT LOAD CURRENT A. Minimum Data Active Time Before Clock Pulse (Data Set-Up Time ...

Page 7

... SERIAL-INPUT, LATCHED SINK DRIVER The UCN5829EB is designed to drive high-current 24-wire (3 devices cascaded) dot matrix impact printer solenoids. The internal CMOS control logic: 1) selects the operating channels from 24-bit word previously loaded into the shift register, 2) controls the peak load current of the output drivers via nine ...

Page 8

SERIAL-INPUT, LATCHED SINK DRIVER To reduce the current decay time at the end of a print enable cycle, an external high-side driver can be used and controlled by the HIGH-SIDE DRIVER (HSD) output. The HSD is designed to ...

Page 9

... The chopping function is disabled when V operation at higher than allowable current levels, V exceed 3.2 V, except to disable the chopping function. For correct operation of the UCN5829EB, the duty cycle must be between 15% and 50% with 20% to 40% recommended. The lower limit is due to internal lockout circuitry while the upper limit guarantees synchronous operation ...

Page 10

... SERIAL-INPUT, LATCHED SINK DRIVER Shown is a typical application with the UCN5829EB controlling a chop current through a 3 mH, 9 cycle and I /I restrictions OUT(asym) OUT(P) where 1 HSD DIODE OUT(SAT) HSD 3.67 OUT(asym then ...

Page 11

BSC 0.020 MIN 0.180 0.165 NOTES: 1. Webbed lead frame. Leads 7 through 17 and 29 through 39 are internally one piece. 2. Exact body and lead configuration at vendor’s option within limits ...

Page 12

... The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current ...

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