Automotive Junction Box

Automotive Junction Box

Such as reduction of power consumption and miniaturization are important in junction box. Toshiba provides information on a wide range of semiconductor products suitable for mechanical relay system, semiconductor relay system, etc., along with circuit configuration examples.

Overall block diagram

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 MCU MCU ECU ECU Heater Heater LED LED CAN Line CAN Line OUT1 OUT1 OUT2 OUT2 OUT3 OUT3 OUTx OUTx GND GND GND GND Battery (12 V) Battery(12 V) Junction Box Junction Box Fuse Fuse Driver Driver Driver Driver Driver Driver Driver Driver Free Wheeling Diode Free Wheeling Diode TVS TVS 円 M M Mechanical Relay Mechanical Relay TVS TVS Power Supply PowerSupply Mechanical relay system
Mechanical relay system

Example of junction box circuit of mechanical relay system

Click the area you want to check the details in the overall block diagram. Show links to our proposed sub-block diagram.

 Power Supply PowerSupply ECU ECU Heater Heater LED LED Gate Driver Gate Driver Gate Driver Gate Driver Gate Driver Gate Driver CAN Line CAN Line Junction Box Junction Box GND GND GND GND OUT1 OUT1 OUT2 OUT2 OUT3 OUT3 OUTx OUTx Battery (12 V) Battery(12 V) Gate Driver Gate Driver MCU MCU MOSFET MOSFET MOSFET MOSFET MOSFET MOSFET MOSFET MOSFET Free Wheeling Diode Free Wheeling Diode 円 M M Semiconductor Relay Semiconductor Relay TVS TVS TVS TVS Semiconductor relay system
Semiconductor relay system

Example of junction box circuit of semiconductor relay system

Sub block diagram

Mechanical relay system
Mechanical relay system

Example of junction box circuit of mechanical relay system

Example of junction box circuit of mechanical relay system
MOSFET with a built-in active clamp circuit
Part Number
SSM3K347R
SSM3K337R
Toshiba Package Name SOT-23F SOT-23F
VDSS (Max) [V] 38 38
ID (Max) [A] 2.0 2.0
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 0.41 0.176
Polarity N-ch + Active Clamp Zener N-ch + Active Clamp Zener
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Low side switch / High side switch (up to 1 A)
Part Number
TPD1044F
TPD1054F
TPD1052F
Toshiba Package name PS-8 PS-8 PS-8
VBB (Max) [V]      
VCC (Max) [V]      
IO (Max) [A]   1.0 0.8
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General purpose small signal MOSFET
Part Number
SSM3K7002KF
SSM3J168F
SSM3J66MFV
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
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General purpose small signal bipolar transistor
Part Number
2SA1832
2SC4738
2SC4116
2SA1586
2SC2712
2SA1162
Toshiba Package Name SOT-416 (SSM) SOT-416 (SSM) SOT-323 (USM) SOT-323 (USM) SOT-346 (S-Mini) SOT-346 (S-Mini)
VCEO (Max) [V] -50 50 50 -50 50 -50
IC (Max) [A] -0.15 0.15 0.15 -0.15 0.15 -0.15
Polarity PNP NPN NPN PNP NPN PNP
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Small signal bias resistor built-in transistor (BRT)
Part Number
RN1907FE
RN2907FE
RN1901
RN2901
Toshiba Package Name SOT-563 (ES6) SOT-563 (ES6) SOT-363 (US6) SOT-363 (US6)
VCEO (Q1) (Max) [V] 50 -50 50 -50
VCEO (Q2) (Max) [V] 50 -50 50 -50
IC (Q1) (Max) [A] 0.1 -0.1 0.1 -0.1
IC (Q2) (Max) [A] 0.1 -0.1 0.1 -0.1
Polarity (Q1) NPN PNP NPN PNP
Polarity (Q2) NPN PNP NPN PNP
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TVS diode (for CAN communication)
Part Number
DF3D18FU
DF3D29FU
DF3D36FU
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
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Semiconductor relay system
Semiconductor relay system

Example of junction box circuit of semiconductor relay system

Example of junction box circuit of semiconductor relay system
U-MOS Series 40 V N-ch MOSFET
Part Number
XPN3R804NC
TK1R4S04PB
XPHR7904PS
TPWR7904PB
XPJR6604PB
XPQR3004PB
Toshiba Package Name TSON Advance(WF) DPAK+ SOP Advance(WF) DSOP Advance(WF)L S-TOGL L-TOGL
VDSS (Max) [V] 40 40 40 40 40 40
ID (Max) [A] 40 120 150 150 200 400
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0038 0.00135 0.00079 0.00079 0.00066 0.00030
Polarity N-ch N-ch N-ch N-ch N-ch N-ch
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Gate driver (for switch)
Part Number
TPD7104AF
TPD7106F
TPD7107F
Toshiba Package name PS-8 SSOP16 WSON10A
VBB (Max) [V]      
VCC (Max) [V]      
IO (Max) [A] +5mA/ Internally Limited   Internally Limited /-5m
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General purpose small signal MOSFET
Part Number
SSM3K7002KF
SSM3J168F
SSM3J66MFV
Toshiba Package Name SOT-346 (S-Mini) SOT-346 (S-Mini) SOT-723 (VESM)
VDSS (Max) [V] 60 -60 -20
ID (Max) [A] 0.4 -0.4 -0.8
RDS(ON) (Max) [Ω] @ |VGS| = 4.5 [V] 1.75 1.9 0.39
Polarity N-ch P-ch P-ch
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General purpose small signal bipolar transistor
Part Number
2SA1832
2SC4738
2SC4116
2SA1586
2SC2712
2SA1162
Toshiba Package Name SOT-416 (SSM) SOT-416 (SSM) SOT-323 (USM) SOT-323 (USM) SOT-346 (S-Mini) SOT-346 (S-Mini)
VCEO (Max) [V] -50 50 50 -50 50 -50
IC (Max) [A] -0.15 0.15 0.15 -0.15 0.15 -0.15
Polarity PNP NPN NPN PNP NPN PNP
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Small signal bias resistor built-in transistor (BRT)
Part Number
RN1907FE
RN2907FE
RN1901
RN2901
Toshiba Package Name SOT-563 (ES6) SOT-563 (ES6) SOT-363 (US6) SOT-363 (US6)
VCEO (Q1) (Max) [V] 50 -50 50 -50
VCEO (Q2) (Max) [V] 50 -50 50 -50
IC (Q1) (Max) [A] 0.1 -0.1 0.1 -0.1
IC (Q2) (Max) [A] 0.1 -0.1 0.1 -0.1
Polarity (Q1) NPN PNP NPN PNP
Polarity (Q2) NPN PNP NPN PNP
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TVS diode (for CAN communication)
Part Number
DF3D18FU
DF3D29FU
DF3D36FU
Toshiba Package Name SOT-323 (USM) SOT-323 (USM) SOT-323 (USM)
VESD (Max) [kV] +/-30 +/-25 +/-20
IR (Max) [µA] 0.1 0.1 0.1
Rdyn (Typ.) [Ω] 0.8 1.1 1.5
CT (Typ.) [pF] @ VR = 0 [V], f = 1 [MHz] 9 9 6.5
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Solution Proposal

These documents explain the key points of recommended semiconductor products and their features. Please use them for product selection.

Solution Proposal
SolutionProposal_Automotive Junction Box / English (PDF:1.3MB)
SolutionProposal_Automotive Junction Box / Japanese (PDF:1.8MB)

Documents

Please see the following pages for other documents.

Design & Development

Switched Mode Power Supply Library

you can select and download various basic topologies of a power supply unit based on your actual requirements in order to verify the behavior of MOSFETs with your simulation environment.

Switched Mode Power Supply Library
Motor Control and Driver Circuit Library

you can select and download various basic topologies of motor driver such as three-phase inverter circuit based on your actual requirements in order to verify the behavior of MOSFETs and another devices for your simulation environment.

Motor Control and Driver Circuit Library
EDA/CAD Model Library

We provide simulation data, 3D models of packages, and land pattern models (2D models) used when developing product boards.

EDA/CAD Model Library
MCU Motor Studio

MCU Motor Studio features a PC Tool and motor control firmware dedicated to the TXZ+TM Family Advanced Class microcontrollers from Toshiba.

MCU Motor Studio

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