Datasheet
APPLICATION INFORMATION
Typical Application Diagram
UCD9080
23
24
11
10
12
13
14
EN1
EN2
EN3
EN4
EN5
EN6
EN7
21
22
1
SDA
SCL
6
7
8
1
8
19
9
15
30
VCC
VS
S
MON1
MON2
MO
N3
MON4
MON5
MON6
MON7
26
25
10
kW
10kW
EN
EN
EN
3.3V
3.3V
3.3V
16
MON8
28
27
2
17
N
C
N
C
32
5
R
OSC
RS
T
3
XI
N
29
TEST
20
31
NC
NC
4 NC
10kW
100k
W
3.3V
3.3V
3.3V
0.01 Fm
3.3V
3.3
V
3.3V
DNP
10kW
3.3V
1kW
10kW
3.3V
DNP
10kW
3.3V
1kW
10kW
POR1
3.3V
PO
R2
POR3
POR4
*
*
*
EX:SlaveI C Address=0x65
(Internal ADDR[7:5]=0b110)
2
I C
Master
2
3.3V
Regulator
V
RTN
BUS
V
BU
S
1 Fm
System
Device
Resets
V
OUT1
V
OUT2
V
OUT3
Power
Supply
1
Power
Supply
2
Power
Supply
3
E
N
V
OUT
X
Power
Supply
X
EN8/
ADDR
1/
G PO1
ADDR3
/
G PO3
ADDR2
/
G PO2
ADDR4
/
G PO4
330W
Status
LEDs
UCD9080
www.ti.com
................................................................................................................................................... SLVS692E – SEPTEMBER 2006 – REVISED MAY 2008
Figure 12 illustrates a typical power-supply sequencing configuration. Power Supply 1 and Power Supply X
require active-low enables, whereas Power Supply 2 and Power Supply 3 require active-high enables. V
OUT1
and
V
OUT3
exceed the selected A/D reference voltage, so these outputs are divided before being sampled by the
MON1 and MON3 inputs. V
OUT2
and V
OUTX
are within the selected A/D reference voltage, so theser outputs can
be sampled directly by the MON2 and MON7 inputs. Figure 12 illustrates the use of the GPO digital output pins
to provide status and power-on reset to other system devices.
Figure 12. Typical Power-Supply Sequencing Application
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