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TC78H651AFNG Dataheets PDF



Part Number TC78H651AFNG
Manufacturers Toshiba
Logo Toshiba
Description 1.8-V Dual bridge driver
Datasheet TC78H651AFNG DatasheetTC78H651AFNG Datasheet (PDF)

TC78H651AFNG TOSHIBA CDMOS Integrated Circuit Silicon Monolithic TC78H651AFNG 1.8-V Dual bridge driver IC The TC78H651AFNG is a dual bridge driver IC for DC motors/Stepping motors which incorporates DMOS with low ON resistance in output transistors. Forward, reverse, or stop mode can be selected. Over current detection, thermal shutdown, and under voltage lockout functions are implemented. Features • Power supply voltage (Absolute maximum ratings): 8.0 V (max) • Power supply voltage (Operati.

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TC78H651AFNG TOSHIBA CDMOS Integrated Circuit Silicon Monolithic TC78H651AFNG 1.8-V Dual bridge driver IC The TC78H651AFNG is a dual bridge driver IC for DC motors/Stepping motors which incorporates DMOS with low ON resistance in output transistors. Forward, reverse, or stop mode can be selected. Over current detection, thermal shutdown, and under voltage lockout functions are implemented. Features • Power supply voltage (Absolute maximum ratings): 8.0 V (max) • Power supply voltage (Operating Range): 1.8 V to 7.5 V • Output current (Absolute maximum ratings): 2.0A (max) • Output ON resistance: 0.22 Ω (typ.) (Ta = 25 °C, Sum of upper and lower side, VM = 5.0 V) P-TSSOP16-0505-0.65-001 Weight: 0.06 g (typ.) • Built-in standby function: Consumption current 0 μA (typ.) • Built-in cross conduction protection circuit • Built-in over current detection (ISD), thermal shutdown (TSD), and under voltage lockout (UVLO) • Forward / Reverse / Stop modes are selectable • Package: P-TSSOP16-0505-0.65-001 © 2019 1 Toshiba Electronic Devices & Storage Corporation 2019-1-31 Pin assignment (Top view) VM 1 NC 2 IN4 3 IN3 4 NC 5 IN1 6 IN2 7 NC 8 TC78H651AFNG 16 NC 15 OUT4 14 OUT3 13 NC 12 OUT1 11 OUT2 10 NC 9 GND 2 2019-1-31 Block Diagram TC78H651AFNG VM IN1 IN2 IN3 IN4 37kΩ 150kΩ 37kΩ 150kΩ 37kΩ 150kΩ 37kΩ 150kΩ Regulator Control Circuit UVLO TSD ISD OUT1 OUT2 OUT3 OUT4 GND Note: Please note that in the block diagram, functional blocks or constants may be omitted or simplified for explanatory purposes. Pin Functions Pin name VM NC IN4 IN3 NC IN1 IN2 NC GND NC OUT2 OUT1 NC OUT3 OUT4 NC Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Functional description Power supply pin for motor Non connection Control input pin 4 Control input pin 3 No connection Control input pin 1 Control input pin 2 Non connection GND pin Non connection Output pin 2 Output pin 1 Non connection Output pin 3 Output pin 4 Non connection Remarks Operation range is from 1.8 V to 7.5 V. Use this pin open. Refer to the section of “Input/Output Functions”. Refer to the section of “Input/Output Functions”. Use this pin open. Refer to the section of “Input/Output Functions”. Refer to the section of “Input/Output Functions”. Use this pin open. — Use this pin open.. Motor coil connection pin Motor coil connection pin Use this pin open. Motor coil connection pin Motor coil connection pin Use this pin open. 3 2019-1-31 Input/Output Functions TC78H651AFNG IN1 IN2 IN3 IN4 OUT1 OUT2 L L — — OFF OFF H L — — H L L H — — L H H H — — (Note1) (Note1) — — L L — — — — H L — — — — L H — — — — H H — — L L L L OFF OFF Note1: ”H” that is input previously becomes effective. Note: —: Don’t Care Switching from “IN1 = L / IN2= L” to “IN1 = H / IN2 = H”: Don’t Care Switching from “IN3 = L / IN4= L” to “IN3 = H / IN4 = H”: Don’t Care OUT3 — — — — OFF H L (Note1) OFF OUT4 — — — — OFF L H (Note1) OFF Mode Stop Forward Reverse — Stop Forward Reverse — Standby 4 2019-1-31 Timing Chart of Output Waveforms TC78H651AFNG Input (IN1, IN2, IN3, and IN4) Output (OUT1, OUT2, OUT3, and OUT4) 50 % 50 % tpLH tpHL 10 % 90 % 50 % 90 % 50 % 10 % tr tf Note: Timing charts may be simplified for explanatory purposes. AC characteristic reference values (VM = 3.0 V, Ta = 25°C) Symbol Typ. Unit tpLH 90 tpHL 90 ns tr 20 tf 10 5 2019-1-31 Absolute Maximum Ratings (Ta = 25°C) TC78H651AFNG Characteristics Symbol Rating Unit Power supply voltage Input voltage Output current Output DMOS body diode forward current Power dissipation Operation temperature Storage temperature VM VIN IOUT If PD Topr Tstg 8.0 V -0.3 to 6 V 2.0 A 2.0 A 0.78 (Note 1) W -40 to 105 °C -55 to 150 °C Note 1: When mounted on a single-side glass epoxy board (50 mm × 50 mm × 1.6 mm, Cu area: 40 %, Cu thickness: 35 μm) Back-EMF While a motor is rotating, there is a timing at which power is fed back to the power supply. At that timing, the motor current recirculates back to the power supply due to the effect of the motor back-EMF. If the power supply does not have enough sink capability, the power supply and output pins of the device might rise above the rated voltage (7 V). The magnitude of the motor back-EMF varies with usage conditions and motor characteristics. It must be fully verified that there is no risk that the device or other components will be damaged or fail due to the motor back-EMF. When the power is fed back to the power supply, the body diode of the output DMOS may turn on and a regenerative current may flow. At this time, the voltage applied to the output pin may become a negative value by the voltage of the body diode (Vf). However, if the current of the body diode (If) is a rated value (shown in above table) or less, it is .


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