Mechanical relay control circuit

Example of mechanical relay control circuit for on-board charger

Mechanical relay control circuit

Lineup

TVS diode (for CAN communication)

Part number DF3D18FU DF3D29FU DF3D36FU
Package USM (SOT-323)
VESD [kV] @ISO 10605 ±30 ±30 ±20
VRWM (Max) [V] 12 24 28
Ct (Typ. / Max) [pF] 9 / 10 6.5 / 8
RDYN (Typ.) [Ω] 0.8 1.1 1.5

MOSFET with a built-in active clamp circuit

Part number SSM3K347R SSM3K337R
Package SOT-23F SOT-23F
VDS(DC) [V] 38 38
ID [A] 2 2
RDS(ON) [mΩ] @VGS = 4.0 V Typ. 350 161
Max 480 200
Polarity N-ch N-ch

Low side switch / High side switch (up to 1 A)

Function Low side switch High side switch
Part number TPD1044F TPD1054F TPD1052F
Package PS-8 (2.8 x 2.9 mm)
Features
  • Overcurrent / overtemperature protection
  • Active clamp
  • On-resistance: 0.6 Ω
  • Overcurrent / overtemperature protection
  • Active clamp
  • Diagnostic output function
  • On-resistance: 0.8 Ω
  • Overcurrent / overtemperature protection
  • Diagnostic output function
  • On-resistance: 0.8 Ω

Low side switch / High side switch (1 to 5 A)

Function Low side switch High side switch
Part number TPD1058FA TPD1055FA
Package Back surface
WSON10 (3 x 3 mm)
Features
  • Overcurrent / Overheat protection
  • Active clamp
  • Diagnostic output function
  • ON-resistance: 0.1 Ω
  • Overcurrent / Overheat protection
  • Diagnostic output function
  • ON-resistance: 0.12 Ω

General purpose small signal MOSFET

Part number SSM3K7002KF SSM3J168F SSM3J66MFV
Package

S-Mini
(SOT-346)

S-Mini
(SOT-346)

VESM
(SOT-723)

VDSS [V] 60 -60 -20
ID [A] 0.4 -0.4 -0.8

RDS(ON)

@|VGS| = 4.5 V [Ω]

Typ. 1.2 1.4 0.31
Max 1.75 1.9 0.39
Drive voltage [V] 4.5 -4.0 -1.2
Polarity N-ch P-ch P-ch

General purpose small signal bipolar transistor

Package SOT-23F

USM (SOT-323)

UFM (SOT-323F)*

S-Mini (SOT-346)
Classification |VCEO| [V] |IC| [mA] NPN PNP NPN PNP NPN PNP
General purpose 50 150     2SC4116 2SA1586 2SC2712 2SA1162
50 500         2SC3325 2SA1313
Low noise 120 100     2SC4117 2SA1587 2SC2713 2SA1163
High current 50 1700       2SA2195*    
50 2000   TTA501        
50 2500 TTC501          

* indicates UFM package

Small signal bias resistor built-in transistor (BRT)

Part number NPN (BRT) PNP (BRT)
Package ES6 (SOT-563) RN1907FE RN2907FE
US6 (SOT-363) RN1901 RN2901
VCEO [V] 50 -50
IC [mA] 100 -100

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