SMH4804 Datasheet, PDF (2/41 Pages) Summit Microelectronics, Inc. – -48V Programmable Hot Swap Sequencing Power Controller

Functional Block Diagram
–
FUNCTIONAL BLOCK DIAGRAM
SMH4804
SCL
11
SDA
10
2.5VREF
20
ENPGA ENPGB ENPGC
23
22
21
VDD 28
EN/TS 4
PD1# 5
PD2# 6
UV 15
OV ₁₇
DRAIN ₁
SENSE
12VREF
50kΩ
PROGRAMMING
STEERING
LOGIC
50kΩ
50kΩ
50kΩ
50kΩ
PROGRAMM-
ABLE
DELAY
50kΩ
200kΩ
50kΩ
+
–
+
PROG
–
REF
+
–
10µA
P. D.
FILTER
+
–
OV/UV
FILTER
PROGRAMM-
ABLE
DELAY
PROGRAMM-
ABLE
DELAY
27 PG4#
24 PG3#
26 _PG2#
25 PG1#
19 5.0VREF
5V
VSS 14
A0 2
A1 13
A2 16
MODE ₉
RESET# ₈
12V 2.5V
CBSENSE 12
PROGRAMM-
ABLE
DELAY
50mV
Programmable
Quick Response
Ref. Voltage
Three
@ 50kΩ
50kΩ
DEVICE
ADDRESS
DECODE
P. D.
FILTER
+
–
+
–
50kΩ
FAULT
LATCH
AND
DUTY
CYCLE
TIMER
Figure 2. SMH4804 Block Diagram
VGATE
SENSE
3 VGATE
Programmable
Shutdown
Timer
7 _FAULT#
18 FS#
2050 BD
2
2050 3.7 10/30/02
Summit Microelectronics