ucn5829 Allegro MicroSystems, Inc., ucn5829 Datasheet - Page 10

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

5829
9-BIT SERIAL-INPUT,
LATCHED SINK DRIVER
a chop current of 1 A through a 3 mH, 9
cycle and I
where
then
The condition of I
be within the proscribed limits. The actual duty cycle is
For a 50 kHz chopping frequency and a 250 s print enable time, the
remaining component values are
with
then
and
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
dc =
Shown is a typical application with the UCN5829EB controlling
v
v
I
I
C
R
R
OUT(asym)
OUT(asym)
d
c
OUT(asym)
C
C
EN
I
OUT(P)
= V
= V
= 250 pF and C
= 1/(2 f
= t
BB
HSD
OUT(asym)
EN
/I
/ I
1 + v
/I
- V
= v
OUT(asym)
OUT(P)
/ C
+ V
OUT(P)
ch
OUT(SAT)
c
EN
C
d
DIODE
/ R
/v
C
/ I
) = 1/(2 x 50 x 10
restrictions
c
= 250 x 10
L
= 3.67 / 1 = 3.67
OUT(P)
+ v
= 33 / 9 = 3.67
EN
- V
d
/v
1.5 + 1.5 = 3
= 0.01 F
HSD
c
> 2.5 is met and the duty cycle will
=
= 36 - 1.5 - 1.5 = 33
-6
1.0/3.67 + 2.5/33
/ 10 x 10
1 + 2.5/33
load. To check the duty
3
x 250 x 10
-9
= 25 k
-12
) = 40 k
= 32%