EMB1432Q Datasheet, PDF (1/22 Pages) Texas Instruments – 60V 14-Channel Battery Stack Module Analog Front End

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EMB1432Q
SNOSB86D – JUNE 2011 – REVISED OCTOBER 2014
EMB1432Q 60-V, 14-Channel Battery Stack Module Analog Front End
1 Features
•1 Positive Supply Voltage 4.75 V to 5.5 V
• Negative Supply Voltage −5.5 V to −4 V
• Positive Supply Current 750 µA (max)
• V_BATT = (V_SENSE(N) − V_{SENSE(N−1)}) 0.5 V to 4.6 V
• V_SENSE(14) 60 V (max)
• Input Sense Current 6 µA (max)
• Input Referred Offset Voltage ±1 mV (Max)
• Digital Interface Supply 2.7 V to 5.5 V
• Gain 1
• Gain Error 0.05% (max)
• Ambient Operating Temperature −40°C to 125°C
• AEC Q100 Grade 1
2 Applications
• Li-Ion Battery Management Systems
• Hybrid and Electric Vehicles
• Grid Storage
• 48 V Systems
• UPS
Typical Application
VIO
Flying Cap 10 nF
DGND
GND
EMB1432Q
CHM
CHPVP
CHPVM
VM
VP
+5V
1 2F
0.1 2F
1 2F
0.1 2F
100
0.1 2F
+5V 1 2F
0.1 2F
3 Description
The EMB1432Q Battery Stack Module Analog Front
End is a high voltage analog interface designed to
monitor a lithium battery stack. It is able to select and
level shift the voltage across any of 14 stacked
batteries and 2 low voltage auxiliary inputs,
multiplexing the signals to an output pin. The
multiplexer output is set by writing to an internal
register using the SPI™ protocol or by directly
addressing 4 digital pins. The voltage across each
battery can range from –2 V to 5.5 V without
damaging the AFE, with the top cell positive pin
reaching 60 V. The SENSE(N) input impedance
(when the Nth battery is selected) is 1 MΩ typ, and
the current drawn from SENSE(N-1) is 2 µA typ.
When not selected or in shutdown mode, the current
at any sense input drops to less than 1 µA.
The EMB1432Q can precisely level shift a battery
voltage ranging from 0.5 V to 4.6 V with a gain of 1,
an input referred offset voltage of ±1 mV and a gain
error of 0.05% (max). The EMB1432Q operates with
5 V and –5 V supplies. Single supply operation is
also supported: the –5 V supply can be internally
generated using an internal charge pump. The I/O
communication interface can be supplied through
dedicated supply pins (VIO, DGND). The EMB1432Q
is designed to provide accurate analog output over
the AEC-Q100 type 2 temperature range of –40°C to
105°C and to be able to operate up to 125°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
EMB1432Q
WQFN (48)
7.00 mm x 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
1 2F
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.