BAT TERY MANAGEMENT &PROTEC TION PRODUC T PROFILEIntroduction

The rechargeable battery industry is experiencing
significant growth which is projected to continue to expand
into the future. This growth is driven by an increase inportable battery powered devices, electric vehicles, energy
storage and industrial applications.
These applications use various battery chemistries
including nickel cadmium, nickel-metal-hydride, lithiumion, and other chemistries currently in development.

Block Diagram of High Voltage Battery SystemChargerSwitch

Block 1Current
Sense

Block 312 VMaster

Block 4CANSPI(Serial Peripheral Interface)

2Block 2
Cell
Monitoring& BalanceBattery Monitoring
Battery pack voltages can range from a couple of volts inportable electronics to higher voltages such as 48 V and60 V in power tools or in hybrid electric vehicles. For fullyelectric vehicles, battery stacks can be 400 V or higher,
requiring fully isolated communications and power at highworking voltages.

SM91501ALO
SM91502ALA

SM91519L
SM91527L

TBU-DB-Q

HCTSM8

Push/Pull Isolation Transformer
ModelClearance/
CreepageDistance
8 mm min.

HI-POT Pri/sec Rated Current Working Voltage

HCTSM80xx 5K Vdc/60 sec.

Model
SM91501ALO
SM91502ALA

350 mA

AEC-Q200 IATF 16949
Compliant Certified Factory

800 Vrms(higher on request) (longer on request)

BMS Signal Isolation Transformer
Description
Inductance Values
Dual Channel AEC-Q200 Compliant
BMS Transformer + CMC
Single Channel AEC-Q200
Compliant BMS Transformer + CMC

Yes

Yes

Working Voltage

370 µH max.

Functional 1600 VDC

370 µH

Functional 1000 VDC

Model

Cell Monitoring IC A/D Input Surge Protection
Description
Trip Current Working Voltage

TBU-DB-Q

Two Channel
High-Speed Protector

200 mA

550 VTrip Time1 µs

3High Power Magnetics
for Chargers

The Bourns Factory in Dongguan, China produces standard highpower inductors for chargers and customized transformers forhigh frequency and high AC currents in topologies used in highpower converters such as full bridge resonant LLCs.

Custom Transformer
Custom Transformer

PQ2614BLA/BHA

Model

Description

PQ2614BLA/BHA AEC-Q200 Compliant Inductor

4Inductance Values

Saturation Current Range

1-33 µH

2.6 A to 100 A

CANbus

SRF4530A

SRF3225TAC

CDSOT23-24CAN-Q

SRF322TAFD

Model
CDSOT23-T24CAN-Q

SeriesTVS Diodes
DescriptionESD and Surge Protection of CANbus

Working Voltage

ESD Level

24 V

30 kV Contact

CANbus Common Mode Chokes
Description
Impedance Range Current Range

SRF4530A

Auto Grade CMC for Standard CANbus

600 - 7500 ohms

0.2 - 0.36 A

SRF3225TAC

Auto Grade CMC for CANbus
FD Class II up to 2 Mbps

550 - 5100 ohms

0.15 - 0.3 A

SRF322TAFD

Auto Grade CMC for CANbus
FD Class III up to 5 Mbps

5100 ohms

0.15 A5Relay ProtectionBourns® high power TVS diodes can prevent flyback surges fromdamaging MOSFET or relay contact switches which can occur
during disconnection of a short circuit.

Charger

SwitchBlock 1
Block 2Block 3Block 4

PTVS15-xxxC-SH

PTVS3-xxxC-SH

PTVS6-xxxC-SH

PTVS3-xxxC-M

PTVS10-xxxC-SH

PTVS6-xxxC-M

PTVS10-xxxC-M

Power TVS Diodes
Model

Description

Peak Current

Repetitive
Standoff Voltage

PTVS3-xxC-M

Axial Leaded/Surface Mount
Power TVS Diode
Axial Leaded /Surface Mount
Power TVS Diode
Axial Leaded Surface Mount
Power TVS Diode

3 kA

66 - 76 Vwm

6 kA

66 - 76 Vwm

10 kA

66 - 76 Vwm

PTVS6-xxC-M
PTVS10-xxC-M

6Current Sense Resistors
Types Available:• Surface mount• Bus bar mount• CustomFeatures:• Low TCR resistive material• Resistances as low as 25 µΩ• Rated power up to 50 W
• Customization capability• 4-Terminal Kelvin connections 		
in some models• AEC-Q200 compliant
C2M2F-8518-1
C2M2F-8536-1
C2M2F-6918-0

CSS2H-3920
CSS2H-2512

C2M2F-7036-2
CSS4J-4026R
CSS2H-5930

Applications• Power supplies• Motor drives• White goods• Navigation equipment• Battery managementsystems• Frequency converters• On-board chargers• Medical (low/medium risk*)(excluding life support)• DC-DC converters• Automation equipment*Bourns® products have not been designed for and are not intended for use in"lifesaving," "life-critical" or "life-sustaining" applications nor any other applications
where failure or malfunction of the Bourns® product may result in personal injury ordeath. See Legal Disclaimer Notice.

7

Lithium-Ion
Battery Pack Protection
Charging and discharging of smartphone and tablet Lithiumion battery packs is controlled by the gas gauge IC, along withlow resistance MOSFETs and current sense resistors.
For safety reasons, IC independent overcurrent andovertemperature protection may also be added to the pack.
Bourns offers two technologies for pack designers; namely
Multifuse® Polymer PTC technology and Mini-breaker Thermal
Cutoff Device bi-metal technology.

Multifuse® PPTC Device/TCO

Fuse

NTC
Gauge

Shunt

Protection

FETS

Multifuse® PPTC Resettable Fuses
Model

Size

Hold Current

Voltage

MF-USML/X
MF-NSML/X
MF-PSML/X
MF-FSML/X
MF-ASML/X

1210
120808050603
0402

7 A max.
6 A max.
4.5 A max.
3 A max.
0.75 A max.

6 V, 12 V
6 V, 12 V6 V, 8 V, 12 V
6 V, 8 V
6V8

Mini-Breakers(Miniature Resettable Thermal Cutoff Devices)
Types Available:• Low current series(LC, NRC)• High current series(HC, NRA, AC, SA)• Surface Mount Series(SA, SC)

Applications:

Battery cell protection for:• Notebook PCs• Tablet PCs• Smartphones• Mobile phones• Power banks

Features:• Overtemperature and overcurrent
protection in a single device• Resettable activation• Wide range of temperature options:72 ˚C, 77 ˚C, 82 ˚C, 85 ˚C and 90 ˚C• Low resistance• Small & thin size for compact 		
package design• Optimal corrosion 			resistant properties• RoHS compliant*

AC Series
SC Series
HC Series
LC Series
SA Series

NR Series

Mini-Breakers (Miniature Resettable Thermal Cu​toff Devices)
SeriesTrip Temperature (°C) Trip Current @ 60 °C

Voltage

HCAC
LC
NR
SA
SC

72, 77, 82, 85, 90
72, 77, 82, 85, 90
72, 77, 82, 85
72, 77, 82, 85
72, 77, 82, 85
72, 77, 82, 85

28 V
28 V
28 V
28 V
28 V
28 V

7, 8.5, 9.5, 11, 12 A
9, 12, 14, 16, 18 A
2.7, 3.8, 4.5, 5 A
6, 7.8, 9.5, 10.5 A
6, 8.8, 10.2, 11.1 A
6.28, 7.22, 8.37, 8.7 A*RoHS Directive 2015/863, Mar 31, 2015 and Annex.

9Multifuse® Polymer PTC
Resettable Fuses
Features:

Types Available:• 6 to 90 V operating voltages• Hold currents from 10 mA to 11.0 A• Agency certifications - UL, CSA & TÜV• Interrupt voltages of 250 V and 		600 V with surge capabilities 		
for assisting in meeting US and 		international telecom requirements• High temperature polymers available
with operating temperatures 		between –40 °C and +125 °C• Custom designs available 		upon request• Bulk, embossed tape, and ammo		
pack packaging• RoHS compliant* standard &		halogen free** upon request• Some models AEC-Q200 compliant• Radial leaded through-hole• Surface mount 		
(0402, 0603, 0805, 1206,1210, 1812, 2018, 2920& 3425)• Axial leaded battery strap• Unencapsulated disk

MF-MSMF
MF-LSMF
Customized Resettable
Fuses

MF-SD
MF-VS

MF-R

MF-R/600

Applications• Computers• Batteries• Charging ports

MF-SM
MF-NSML• Telecommunications• Industrial controls• Portable electronics• Medical products***(excluding critical life support)• Point of Sale
• Game consoles and toys
• Security systems• DC motors**Bourns considers a product to be “halogen free” if (a) the Bromine (Br)content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less;and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.

10

TBU® High-Speed Protectors
Introduction:

TBU® High-Speed Protectors (HSPs)
are circuit protection devices designed
to protect against faults causedby short circuits, AC power cross,induction and lightning surges.
The TBU® HSPs block surges,
providing a barrier to sensitiveelectronics and eliminating exposure
to large voltages or currents during
surge events up to rated limits.

Features:• Extremely high-speed 		performance• Blocks high voltages & 		currents up to rated limits• Exceptionally low 		
let-through energy• Very high bandwidth,		
GHz compatible• UL recognized components• Programmable models 		
available

P40-G240-WH
TBU-PL060-200-WH
P850-G200-WH

TBU-DT065-500-WH
TBU-CA050-200-WH

Applications• POTS linecards• VoIP equipment• ONUs and ONTs
• Gateways and modems• 10/100 & Gigabit 		
Ethernet• VDSL interfaces• Remote metering & 		surveillance• Industrial automation• Test equipment• RS232, RS422, RS485, 		
CANbus and LVDS
• Sensors***Bourns® products have not been designed for and are not intended for use in"lifesaving," "life-critical" or "life-sustaining" applications nor any other applications
where failure or malfunction of the Bourns® product may result in personal injury or
death. See Legal Disclaimer Notice.

11www.bourns.com

Worldwide Sales Offices
Country/Region
Americas:Brazil:China:EMEA:
Japan:
Korea:
Singapore:
Taiwan:Phone

Email+1-951-781-5500+55 11 5505 0601
+86 21 64821250+36 88 885 877+81 49 269 3204
+82 70 4036 7730
+65 6348 7227
+886 2 25624117

americus@bourns.com
americus@bourns.com
asiacus@bourns.com
eurocus@bourns.com
asiacus@bourns.com
asiacus@bourns.com
asiacus@bourns.com
asiacus@bourns.com

Other Asia-Pacific Countries:		
asiacus@bourns.com+886 2 25624117

Technical AssistanceRegionPhone

EmailAsia-Pacific:
EMEA:
Americas:+886 2 25624117+36 88 885 877+1-951-781-5500

techweb@bourns.com
eurotech@bourns.com
techweb@bourns.com

RegionPhone

EmailJapan+81 6 6319 2281

techweb@bourns.com

Bourns KK“Bourns", "TBU" and “Multifuse" are registered trademarks of Bourns,Inc. in the United States and other countries.
Copyright© 2023, Bourns, Inc. • 11/23 • e/K2365