Electric Power Steering

Electric Power Steering

Such as ensuring tolerance to motor lock current and reduction of power consumption are important in designing electric power steering. Toshiba provides information on a wide range of semiconductor products suitable for motor drive units, power supply units, etc., along with circuit configuration examples.

Overall block diagram

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 MCU MCU Pre Pre Gate Driver / Pre Driver / Motor Controller Current Monitor C... Gate Driver / Pre Driver / Motor ControllerCurrentMonitorCircuit Driving Speed Sensor Driving SpeedSensor MCU MCU Inverter (for brushed DC motor) Inverter(for brushed DC motor) TVS TVS Torque Sensor Torque Sensor Wheel Angle Sensor Wheel Angle Sensor CAN Line CANLine M M Battery (12 V) Battery(12 V) Reverse Battery Protection/ Load Switch Reverse Battery Protection/Load Switch Signal Conditioning Circuit SignalConditioningCircuit Power supply ON/OFF control and reverse connection protecting circuit Motor drive circuit
Motor drive circuit

Example of brushed DC motor drive circuit for EPS

Power supply ON/OFF control and reverse connection protecting circuit

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using P-ch MOSFET for 12 V power lines

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 MCU MCU Driving Speed Sensor Driving SpeedSensor MCU MCU Signal Conditioning Circuit SignalConditioningCircuit Current Monitor Circuit Current Monitor Circuit TVS TVS Wheel Angle Sensor Wheel Angle Sensor Torque Sensor Torque Sensor M M CAN Line CANLine Reverse Battery Protection/ Load Switch Reverse Battery Protection/Load Switch Battery (12 V) Battery(12 V) Inverter Circuit (for brushless DC motor) Inverter Circuit(for brushless DC motor) Position Detection Sensor Position Detection Sensor Power supply ON/OFF control and reverse connection protecting circuit Motor drive circuit
Motor drive circuit

Example of three phase brushless DC motor drive circuit for EPS

Power supply ON/OFF control and reverse connection protecting circuit

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using P-ch MOSFET for 12 V power lines

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

 Signal Conditioning Circuit SignalConditioningCircuit Driving Speed Sensor Driving SpeedSensor EPS Motor EPSMotor MCU MCU MCU MCU Power Supply PowerSupply TVS TVS Semiconductor Relay SemiconductorRelay Semiconductor Relay SemiconductorRelay Power Supply PowerSupply Torque Sensor Torque Sensor Wheel Angle Sensor Wheel Angle Sensor Wheel Angle Sensor Wheel Angle Sensor Position Detection Sensor Position Detection Sensor Inverter Circuit (for brushless DC motor) Inverter Circuit(for brushless DC motor) M M CAN Line CANLine Battery (12 V) Battery(12 V) Inverter Circuit (for brushless DC motor) Inverter Circuit(for brushless DC motor) Reverse Battery Protection/ Load Switch Reverse BatteryProtection/Load Switch Current Monitor Circuit Current Monitor Circuit Current monitor Circuit Current monitor Circuit Power supply ON/OFF control and reverse connection protecting circuit Motor drive circuit
Motor drive circuit

Example of three phase brushless DC motor drive circuit for EPS

Power supply ON/OFF control and reverse connection protecting circuit

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using P-ch MOSFET for 12 V power lines

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

 Driving Speed Sensor Driving SpeedSensor EPS Motor EPSMotor MCU MCU MCU MCU TVS TVS Power Supply PowerSupply Torque Sensor Torque Sensor Wheel Angle Sensor Wheel Angle Sensor M M CAN Line CANLine Battery (12 V) Battery(12 V) Reverse Battery Protection/ Load Switch Reverse BatteryProtection/Load Switch Position Detection Sensor Position Detection Sensor Current Monitor Circuit Current Monitor Circuit Inverter Circuit (for brushless DC motor) Inverter Circuit(for brushless DC motor) Current Monitor Circuit Current Monitor Circuit Inverter Circuit (for brushless DC motor) Inverter Circuit(for brushless DC motor) Signal Conditioning Circuit SignalConditioningCircuit Power Supply PowerSupply Driving Speed Sensor Driving SpeedSensor EPS Motor EPSMotor MCU MCU MCU MCU TVS TVS Power Supply PowerSupply Wheel Angle Sensor Wheel Angle Sensor M M CAN Line CANLine Battery (12 V) Battery(12 V) Reverse Battery Protection/ Load Switch Reverse BatteryProtection/Load Switch Current Monitor Circuit Current Monitor Circuit Inverter Circuit (for brushless DC motor) Inverter Circuit(for brushless DC motor) Current Monitor Circuit Current Monitor Circuit Inverter Circuit (for brushless DC motor) Inverter Circuit(for brushless DC motor) Signal Conditioning Circuit SignalConditioningCircuit Power Supply PowerSupply Wheel Angle Sensor Wheel Angle Sensor Wheel Angle Sensor Wheel Angle Sensor Power supply ON/OFF control and reverse connection protecting circuit Power supply ON/OFF control and reverse connection protecting circuit Motor drive circuit Motor drive circuit
Motor drive circuit

Example of three phase brushless DC motor drive circuit for EPS

Example of brushed DC motor drive circuit for EPS

Power supply ON/OFF control and reverse connection protecting circuit

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using P-ch MOSFET for 12 V power lines

Sub block diagram

Motor drive circuit
Brushed DC motor drive circuit (N-ch type)

Example of brushed DC motor drive circuit for EPS

Example of brushed DC motor drive circuit for EPS
U-MOS Series 40 V N-ch MOSFET
Part Number
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
Brushed DC motor pre driver
Part Number
Toshiba Package Name LQFP48-P-0707-0.50
Product Category H-bridge driver for automobile
Power supply IC (for MCU)
Part Number
Toshiba Package Name SSOP20
Product Category Automobile CPU regulator, built-in watchdog timer
Power supply IC (for MCU, built-in tracker)
Part Number
Toshiba Package Name HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50
Product Category Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer
Power supply ON/OFF control and reverse connection protecting circuit
Power supply ON/OFF control and reverse connection protecting circuit (N-ch type)

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines
U-MOS Series 40 V N-ch MOSFET
Part Number
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
Gate driver (for switch)
Part Number
Toshiba Package name PS-8 SSOP16 WSON10A
VBB (Max) [V]      
VCC (Max) [V]      
IO (Max) [A] +5mA/ Internally Limited   Internally Limited /-5m
General purpose small signal MOSFET
Part Number
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
General purpose small signal bipolar transistor
Part Number
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
Small signal bias resistor built-in transistor (BRT)
Part Number
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
TVS diode (for CAN communication)
Part Number
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
Power supply IC (for MCU)
Part Number
Toshiba Package Name SSOP20
Product Category Automobile CPU regulator, built-in watchdog timer
Power supply IC (for MCU, built-in tracker)
Part Number
Toshiba Package Name HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50
Product Category Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer
Power supply ON/OFF control and reverse connection protecting circuit (P-ch type)

Example of ON/OFF control and reverse connection protecting circuit using P-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using P-ch MOSFET for 12 V power lines
U-MOS Series -40 V / -60 V P-ch MOSFET
Part Number
Toshiba Package Name TSON Advance(WF) DPAK+ DPAK+ SOP Advance(WF) SOP Advance(WF)
VDSS (Max) [V] -40 -40 -60 -40 -60
ID (Max) [A] -40 -90 -60 -100 -90
RDS(ON) (Max) [Ω] @ |VGS| = 10.0 [V] 0.0096 0.0043 0.0112 0.0031 0.0083
Polarity P-ch P-ch P-ch P-ch P-ch
General purpose small signal MOSFET
Part Number
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
General purpose small signal bipolar transistor
Part Number
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
Small signal bias resistor built-in transistor (BRT)
Part Number
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
TVS diode (for CAN communication)
Part Number
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
Power supply IC (for MCU)
Part Number
Toshiba Package Name SSOP20
Product Category Automobile CPU regulator, built-in watchdog timer
Power supply IC (for MCU, built-in tracker)
Part Number
Toshiba Package Name HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50
Product Category Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer
Motor drive circuit
Brushless DC motor drive circuit (N-ch type)

Example of three phase brushless DC motor drive circuit for EPS

Example of three phase brushless DC motor drive circuit for EPS
U-MOS Series 40 V N-ch MOSFET
Part Number
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
Gate driver (for motor)
Part Number
Toshiba Package name PS-8 WQFN32 SSOP30
VBB (Max) [V]      
VCC (Max) [V]      
IO (Max) [A] +0.5/-0.5 +1.5/-1 +1.5/-1
Brushless DC motor pre driver
Part Number
Toshiba Package Name QFP64-P-1010-0.50C P-VQFN48-0707-0.50-005
Product Category Pre-driver for automobile Pre-driver for automobile
Power supply IC (for MCU)
Part Number
Toshiba Package Name SSOP20
Product Category Automobile CPU regulator, built-in watchdog timer
Power supply IC (for MCU, built-in tracker)
Part Number
Toshiba Package Name HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50 HTSSOP48-P-300-0.50
Product Category Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer Automobile CPU regulator, built-in watchdog timer
Power supply ON/OFF control and reverse connection protecting circuit
Power supply ON/OFF control and reverse connection protecting circuit (N-ch type)

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines

Example of ON/OFF control and reverse connection protecting circuit using N-ch MOSFET for 12 V power lines
U-MOS Series 40 V N-ch MOSFET
Part Number
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
Gate driver (for switch)
Part Number
Toshiba Package name PS-8 SSOP16 WSON10A
VBB (Max) [V]      
VCC (Max) [V]      
IO (Max) [A] +5mA/ Internally Limited   Internally Limited /-5m
General purpose small signal MOSFET
Part Number
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
General purpose small signal bipolar transistor
Part Number
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
Small signal bias resistor built-in transistor (BRT)
Part Number
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