NCP45491 Shunt Monitor Datasheet

NCP45491 Datasheet, PDF, Equivalent


Part Number

NCP45491

Description

4-Channel Voltage Bus and 4-Channel High-Side Current Shunt Monitor

Manufacture

ON Semiconductor

Total Page 12 Pages
Datasheet
Download NCP45491 Datasheet


NCP45491
NCP45491
26V, 4-Channel Voltage Bus
and 4-Channel High-Side
Current Shunt Monitor
The NCP45491 is a highperformance monolithic IC which can be
used to monitor bus voltage and current on four highvoltage power
supplies simultaneously. The HV bus voltages and currents are
translated to a lowvoltage power domain and multiplexed onto a
single differential output for measurement externally by common
ADCs. The device is configurable to operate either standalone or as a
pair, permitting up to eight separate HV power supplies to be
monitored and measured.
Features
Translates and Scales Shunt and Bus Voltages up to 26 V
Single Device Monitors Four Supplies
May Be Paired for Monitoring Up To Eight Supplies
Very Low Powerdown Current
All Channels Individually Gain Programmable by External Resistor
Selection
Fast Settling Time
RealTime Indication of All Bus Voltages Valid
Adjustable Output CommonMode Voltage Adapts to Most External
ADCs
LeadFree Device
Applications
Computers/Notebooks
Graphical Cards
Power Management/Power Control Loops
Battery Chargers
VBUS
R3
R4
R1
SH_IN_P1
RSHUNT
`
to load
SH_IN_N1
BS_IN1
Channel 1 (of4)
Sequence
Logic
MUX_SEL
MODE_SEL
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1
QFN32 4x4
CASE 485CD
MARKING DIAGRAM
45491
ALYWG
CCCCC
45491 = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Package
CCCCC = Country of Assembly
PIN CONFIGURATION
SH_IN_N1 1
SH_IN_P1 2
BS_IN1 3
SH_IN_N2 4
SH_IN_P2 5
BS_IN2 6
SH_O2 7
NC 8
33: GND
24 BS_REF
23 BG_REF_OUT
22 CM_REF_IN
21 NC
20 DIFF_OUT_P
19 DIFF_OUT_N
18 NC
17 SH_O4
SH_O1
R2
GND_FET
ENABLE
SKIP
from Channel 2
from Channel 3
from Channel 4
Multiplexer
Single-ended
to Diff Amp
DIFF_OUT_P
DIFF_OUT_N
VREF
Generator
BG_REF_OUT
BS_REF
R5 R6 `
R7
Figure 1. Block Diagram
BS_OK
CM_REF_IN
R8 `
(Top View)
ORDERING INFORMATION
Device
NCP45491XMNTWG
Package
QFN32
(PbFree)
Shipping
4000 /
Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2018
December, 2018 Rev. 5
1
Publication Order Number:
NCP45491/D

NCP45491
Table 1. PIN DESCRIPTION
Pin Name
2, 5, 12, 15
SH_IN_Px
1, 4, 13, 16
SH_IN_Nx
32, 7, 10, 17
SH_Ox
3, 6, 11, 14
BS_INx
20 DIFF_OUT_P
19 DIFF_OUT_N
22 CM_REF_IN
29 MUX_SEL
24 BS_REF
30 BS_OK
28 ENABLE
23 BG_REF_OUT
9 GND_FET
25 SKIP
26 MODE_SEL
8, 18, 21,31
NC
27 VCC
PAD GND
NCP45491
I/O
AI
AI
AO
AI
AO
AO
AI
DI
AI
DO
DI
AO
AO
DI
AI
PWR
GND
Function
Shunt Resistor Sense +, High Voltage
Shunt Resistor Sense , High Voltage
Shunt Voltage Gain Set / Filter, Current Output
Bus Voltage Sense, High Impedance Input
Differential Output, Positive
Differential Output, Negative
CommonMode Reference for Differential Output
Multiplexer Select Input
Bus OK Reference Input
Bus OK output (opendrain; high impedance = BUS OK)
Device Enable. When low, places device in lowpower state
Buffered Bandgap Voltage Output
Lowside GND ref for resistor dividers (open drain type)
Skip Function control (see description)
Multilevel Input for singledevice, device A, or device B modes
Pins must be floated
Device Power
Device Ground
Table 2. MAXIMUM RATINGS
Rating
Pins
Condition
Symbol
Value
Unit
Supply Voltage Range
Shunt Input Voltage Range
Bus Input Voltage Range
Grounding FET Range
Shunt Output Voltage Range
Digital Input Voltage Range
VCC
SH_IN_Px, SH_IN_Nx
BS_INx
GND_FET
SH_Ox
MUX_SEL, ENABLE, SKIP,
MODE_SEL
GND = 0 V
GND = 0 V
GND = 0 V
GND = 0 V
GND = 0 V
GND = 0 V
VCC
VSH_IN_X
VBS_IN
VGND_FET
VSH_Ox
VEN
0.3 to 5.5
0.3 to 30
0.3 to 30
0.3 to 30
0.3 to 5.5
0.3 to 5.5
V
V
V
V
V
V
Low Voltage I/O Range
BS_REF, CM_REF_IN,
MODE_SEL, DIFF_OUT_P,
DIFF_OUT_N, BS_OK,
BG_REF_OUT
GND = 0 V
VLV
0.3 to 5.5
V
Thermal Resistance, JunctiontoAir
Thermal Resistance, JunctiontoCase
(VIN Paddle)
RqJA
RqJC
40 °C/W
5 °C/W
Operating Temperature Range
Functional Temperature Range
Maximum Junction Temperature
TA1
40 to 105
°C
TA2
40 to 125
°C
TJ 125 °C
Storage Temperature Range
TSTG
40 to 150
°C
Lead Temperature, Soldering (10 sec.)
TSLD
260 °C
Moisture Sensitivity Level
MSL 1
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
www.onsemi.com
2


Features NCP45491 26V, 4-Channel Voltage Bus and 4-Channel High-Side Current Shunt Moni tor The NCP45491 is a high−performan ce monolithic IC which can be used to m onitor bus voltage and current on four high−voltage power supplies simultane ously. The HV bus voltages and currents are translated to a low−voltage powe r domain and multiplexed onto a single differential output for measurement ext ernally by common ADCs. The device is c onfigurable to operate either standalon e or as a pair, permitting up to eight separate HV power supplies to be monito red and measured. Features • Transla tes and Scales Shunt and Bus Voltages u p to 26 V • Single Device Monitors Fo ur Supplies • May Be Paired for Monit oring Up To Eight Supplies • Very Low Powerdown Current • All Channels Ind ividually Gain Programmable by External Resistor Selection • Fast Settling T ime • Real−Time Indication of All B us Voltages Valid • Adjustable Output Common−Mode Voltage Adapts to Most External ADCs • Lead−Free Device Applications • Co.
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