2547
PROTECTED
QUAD POWER DRIVERS
2547
PROTECTED
QUAD POWER DRIVERS
Providing interface between low-level logic and power loads, the
UDK/UDN/UDQ2547B and UDK/UDN/UDQ2547EB quad power
drivers combine logic gates and high-current bipolar outputs with
complete output protection. Each of the four outputs will sink 600 mA
in the ON state. The outputs have a minimum breakdown voltage
(load dump) of 60 V and a sustaining voltage of 40 V. The inputs are
compatible with TTL and 5 V CMOS logic systems and include internal
pull-down resistors to ensure that the outputs remain OFF if the inputs
are open-circuited.
Over-current protection for each channel has been designed into
these devices and is activated at approximately 1.3 A. It protects each
output from short circuits with supply voltages up to 25 V. When a
maximum driver output current is reached, that output drive is reduced
linearly, maintaining a constant load current. If the over-current or
short circuit condition continues, each channel has an independent
thermal limit circuit which will sense the rise in junction temperature
and turn OFF the individual channel that is at fault. Foldback circuitry
decreases the output current if excessive voltage is present across the
output and assists in keeping the device within its SOA (safe operating
area).
Each output also includes diagnostics for increased device protec-
tion. If any output is shorted or opened, the diagnostics can signal the
controlling circuitry through a common FAULT pin.
These devices can be used to drive various resistive loads includ-
ing incandescent lamps (without warming or limiting resistors). With
the addition of external output clamp diodes, they can be used to drive
inductive loads such as relays, solenoids, or dc stepping motors.
The suffix 鈥楤鈥?devices are 16-pin power DIPs while the suffix 鈥楨B鈥?/div>
devices are 28-lead power PLCCs for surface-mount applications.
Both packages are of batwing construction to provide for maximum
package power dissipation.
Data Sheet
29317.4C
UDx2547B
FAULT
OUT
1
OUT
2
GROUND
GROUND
OUT
3
NO
CONNECT.
OUT
4
1
2
3
4
5
6
7
8
V
CC
16
15
14
13
12
11
10
9
IN
1
IN
2
ENABLE
GROUND
GROUND
SUPPLY
IN
3
IN
4
Dwg. PP-018A
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25
擄
C
Output Voltage, V
OUT
............................
60 V
Over-Current Protected Output Voltage,
V
OUT
...............................................
25 V
Output Current, I
OUT
..........................
1.3 A*
FAULT Output Voltage, V
F
...................
40 V
Supply Voltage, V
CC
............................
7.0 V
Input Voltage, V
IN
or V
EN
......................
7.0 V
Package Power Dissipation,
P
D
........................................
See Graph
Operating Temperature Range, T
A
Prefix 鈥楿DK鈥?...............
-40
擄
C to +125
擄
C
Prefix 鈥楿DN鈥?.................
-20
擄
C to +85
擄
C
Prefix 鈥楿DQ鈥?.................
-40
擄
C to +85
擄
C
Storage Temperature Range,
T
S
...............................
-55
擄
C to +150
擄
C
*Outputs are current limited at approximately
1.3 A per driver and junction temperature limited
if current in excess of 1.3 A is attempted. See
Circuit Description and Application for further
information.
FEATURES
s
s
s
s
s
Output SOA Protection
s
Low Output-Saturation Voltage
Diagnostic FAULT Output
s
TTL and 5 V CMOS Compatible Inputs
Independent Over-Current Protection for Each Driver
Independent Thermal Protection for Each Driver
600 mA Output Current per Channel
Always order by complete part number: a prefix to indicate operat-
ing temperature range + the basic four-digit part number + a suffix to
indicate package style, e.g.,
UDK2547EB
.
1
2
3
4
5
6
7
8
