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Nuvoton KA49517A Datasheet
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Nuvoton KA49517A Datasheet
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Page 1 of 224
KA49517A
Rev 1.02March 25, 2021
KA49517A Product Standards
KA49517A
Product Standards
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation Japan and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing document only for reference purposes of KA49517A Battery Monitoring IC based
system design. Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or question, please contact Nuvoton Technology Corporation Japan.
www.nuvoton.co.jp
Industrial Application
Battery Monitoring IC
Page 2 of 224
KA49517A
Rev 1.02March 25, 2021
KA49517A Product Standards
Maximum support 17 battery cells in series
10mV measurement accuracy with 14 bits voltage ADC for cell
voltage, and 5 channels analog input measurement for
Thermistor
Built-in 16 bits Low speed Current measurement ADC
(Coulomb Counter) and 15 bits High speed Current
measurement ADC
Low–side Sense resistor Current measurement and monitoring
Operation mode - Active, Standby/Low power; Sleep and
Shutdown
SPI serial communication interface up to 1MHz clock with CRC
code correction and watchdog timer
Built-in ALARM pins for overvoltage, undervoltage, overcurrent
and short circuit detection and protection feature
Built-in cell balancing MOSFET, support external cell balance
MOSFET operation as well
3 channels General GPIO and 2 channels high voltage output
GPOH
Interrupt signal provision for MCU to notify state of operation as
well as measurement cycle indication at the available GPIO pins
High-side N-MOSFET driver: Charge (CHG) & Discharge (DIS)
with built-in charge pump and FETOFF control pin
Built in controllable fuse driver for cell OV and overcurrent
monitoring algorithm to serve as secondary protection system
Regulator (REG_EXT) for external circuit power provision with
selectable output setting 5V/3.3V/2.5V, and 50mA drive ability
Safety Diagnostic function for measurement related check and
FET driver check to enhance the total diagnostic coverage of
the chip
Package : TQFP 64L (10x10x1mm
3
, Lead Pitch 0.5mm)
System Block Diagram
Overview
KA49517A is a battery monitoring IC with protection function.
With high resolution ADC built-in, KA49517A is capable to
measure battery cell voltage and current level accurately.
Through SPI serial interface, microcontroller unit (MCU) is
able to read the status and measured result by KA49517A.
The ALARM pins alert the MCU with the abnormal condition
such as over voltage (OV), under voltage (UV),
over current (OC) and short circuit (SC).
KA49517A can support an application with up to 17 batteries
cells in series or a maximum voltage of 85V, it is suitable for
application with high input voltage such as E-bike, UPS etc.
Characteristics
• Pedelec, e-Bike, UPS, Server Backup System, Power Tool,
Energy Storage Systems etc
Applications
Notes: This is just an example of a circuit set: it is not guaranteed
to function identically to the final production version.
When designing a set for production, make sure to
carefully evaluate and verify the circuitry.
Representation Characteristics
Measurement accuracy
Application circuit example (17cells connection),
VBAT=62.9V , cell voltage ΔCn (C
n
-C
n-1
) = 3.7V
Measurement accuracy [mV]
Temperature [C]
SERIAL DATA
To and from
MCU/ECU
VBAT
GND
Reference
14bit
VADC
REGISTERS
AND
CONTROL
17-CELL
BATTERY
MUX
15 bit Fast
IADC
Reference
VPACK
FET Driver
16 bit Slow
IADC
Reference
VPACK+
VPACK-
Page 3 of 224
KA49517A
Rev 1.02March 25, 2021
KA49517A Product Standards
Table of Contents
Characteristics ……………………………………………………………………………..... 2
Overview ……………………………………………………………………………………... 2
Applications ………………………………………………………………………………….. 2
System Block Diagram ……………………………………………………………………… 3
Representative Characteristic ……………………………………………………………… 3
Absolute Maximum Ratings ………………………………………………………………… 4
Power Dissipation Ratings …………………………………………………………………. 5
Recommended Operating Conditions …………………………………………………….. 5
Electrical Characteristics …………………………………………………………………… 6
Pin Assignment …………………………………………………………………………….. 16
Pin Description ……………………………………………………………………………... 17
Block Diagram ……………………………………………………………………………… 20
Application Circuit Example ………………………………………………………………. 21
Recommended Constant of External Component …………………………………….... 22
Description of Functions …………………………………………………………………... 24
1. Battery Connection …………………………………………………………………..……. 24
2. Operation Mode …………………………………………………………………..……….. 26
3. Power Supply ……………………………………………………………………………….35
4. Charger detection and Load detection ………………………………………………….. 40
5. DIS/CHG FET control …………………………………………………………………….. 47
6. General Purpose High voltage Output (GPOH 1/2) …………………………………… 50
7. General Purpose Input Output (GPIO1 ~ 3) ……………………………………………. 53
8. Cell Balance ….……………………………………………………………………………. 63
9. Voltage Measurement ..…………………………………………………………………… 67
10. Current Measurement ..………………………………………………………………….. 92
11. Monitoring and Protection ………………………………………………………………..101
12. Safety Diagnosis Features ..……………………………………………………………. 118
13. SPI Communication Interface ...……………………………………………………….. 135
14. Chemical Fuse Driver for Secondary protection …………………………………….. 144
Explanation of Registers ……….………………………………………………………… 151
Input and Output Terminal Circuit Diagram ..………………………………………….. 213
Dimensions ……………….…………………….………………………………………… 221
IMPORTANT NOTICE ………………………..…………………………………………. 222
Page 4 of 224
KA49517A
Rev 1.02March 25, 2021
KA49517A Product Standards
Absolute Maximum Ratings
Parameter Symbol *1 Rating Unit Notes
Supply voltage
V
VBAT
to GND -0.3 to 130 V *5
V
CVDD
to GND -0.3 to 6.4 V *2
V
VDD55
to GND -0.3 to 6.4 V *2
V
VDD18
to GND -0.3 to 2.3 V *2
V
REGEXT
to GND -0.3 to 6.4 V *2
Input Voltage Range
Cn (n=10 ~17)
-0.3 to V
VBAT
V
Cn (n=1~9)
-0.3 to 38 + 11*(N-1) V
C0 -0.3 to 38 V
SEN, SCL, SDI, FETOFF,
GPIOn (n=1~3)
-0.3 to V
CVDD
+0.3 V *3
TMONIn (n=1~5),
REGEXT_SEL
–0.3 to V
VDD55
+0.3
V *3
SRP.SRN -0.5 to 2.0 V
VPC -0.3 to 130 V
LDM -0.3 to 130 V
SHDN -0.3 to 6.4 V
Output Voltage Range
ALARM1,SDO,NRST -0.3 to V
CVDD
+0.3 V
GPOHn (n=1~2)
-0.3 to 130 V
REGB -0.3 to 14 V
Output Current Range
ALARM1,SDO,NRST
GPIOn (n=1~3)
-6.0 to +6.0
(-12.0 to +12.0)
mA
*4
REGB -3.5 to 3.5 mA
REGEXT -50.0 to 0 mA *6
Allowable Voltage Between Pins
C
n
- C
n-1
(n=1~17)
-0.3 to 11 V
Operating junction temperature T
j
-40 to 125 C *2
Storage temperature T
stg
-55 to 125 C *2
Notes: Stresses that exceed the absolute maximum ratings may cause fatal damage to the product.
This specifies the maximum rating for stress.
It is NOT a guaranteed operating region because it exceeds the recommended operating conditions.
The reliability of the IC may be affected if it is kept under absolute maximum rating conditions for long periods.
Applied external current and voltage to pins should also not exceed the absolute maximum ratings listed here.
*1: GND is the voltage of pins GND1, GND2, and GND3 which are connected inside the device.
Connect these pins on the board and apply the same voltage.
*2: The maximum ratings are allowable unless the power consumption exceeds the power dissipation ratings.
*3: V
CVDD
is the voltage of CVDD. V
VDD55
is the voltage of VDD55. It should not exceed the rated 6.4 V.
*4: + Polarity is the direction in which current flows into the IC pins.
– Polarity is the direction in which current flows out from the IC pins.
*5: V
VBAT
is the voltage of VBAT. It should not exceed the rated 130V.
*6: The output circuit consists of both external components and internal circuitry. Refer to the application circuit
diagram.
Page 5 of 224
KA49517A
Rev 1.02March 25, 2021
KA49517A Product Standards
Package θj-a θj-c P
D
(Ta = 25C) P
D
(Ta=105C) Note
TQFP 64L (10x10x1mm
3
,
Lead Pitch 0.5mm)
38.6 C/W 2.7 C/W 2.65 W 0.53 W *1
Notes: These characteristics are the reference values for design.
Refer to the PD-Ta characteristics diagram in the package specifications. Thermal design with a sufficient margin is
recommended based on the conditions of supply voltage, load, and ambient temperature.
*1: Mounting board: Glass epoxy 4-layer board without soldered heat spreader measuring 50 mm x 50 mm x 0.8 mm
Wiring layer thickness: all layers 0.035 mm, proportion of copper foil: 57% / 100% / 100% / 57%
Recommended Operating Conditions
Below items must be within the range of Recommended Operating Conditions.
Parameter
Symbol *1
Min. Typ. Max. Unit Note
Supply voltage range
V
VBAT
12.5 62.9 85 V *2
V
CVDD
3.0 5.0 5.5 V
Input Voltage Range
C
n
- C
n-1
(n=1~17)
1.0 — 4.8 V *3
SEN, SCL, SDI 0 — V
CVDD
V
TMONIn (n=1~5)
0 — V
VDD55
V
GPIOn (n=1~3)
0 — V
CVDD
V
REGSEL 0 — V
VDD55
V
SRP,SRN -0.18 — 0.18 V
VPC 0 — 85 V
LDM 0 — 85 V
SHDN 0 — V
VDD55
V
Operating Ambient
Temperature
Ta
opr
–40 25 105
℃
*1: GND is the voltage of pins GND1, GND2, and GND3, which are connected inside the device.
Connect these pins on the board and apply the same voltage.
*2 : The recommended operating supply range varies due to the characteristics of the external Nch BJT connected to
VDD55. Use the parts described in the recommended circuit.
*3: The C
n
- C
n-1
voltage measurement accuracy is not guaranteed if input is less than 2.0 V or more than 4.3 V.
Moreover, the measurement accuracy is not guaranteed unless the following conditions are fulfilled.
C2 > 2.0 V, C17 > 12 V, VBAT – C17 > –2 V, VBAT - C16 > 1 V
* Cn (n = 1 to 17) and VBAT voltage in this conditions are in reference to GND.
* Similarly for the monitoring system, replace the above condition Cn (n = 1 to 17) with CBn (n = 1 to 17).
Power Dissipation Ratings
CAUTION
Although this IC has built-in ESD protection circuit, it may still sustain permanent damage if not handled properly.
Therefore, proper ESD precautions are recommended to avoid electrostatic damage to the MOS gates.
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