TB67H451AFNG — Datasheet Summary, Specs & Alternatives

01 — Overview

This Toshiba datasheet covers the TB67H451AFNG, a PWM chopper type DC brushed motor driver using BiCD process technology. It is designed to drive motors with high voltage and large current capabilities while offering four operational modes including forward, reverse, brake, and stop functions. Key performance parameters include a rated output voltage of 50 V, a maximum current of 3.5 A, and a total on-resistance of 0.6 Ω for both high-side and low-side MOSFETs. The device integrates built-in error detection features such as thermal shutdown, over-current protection, and under-voltage lockout, along with an internal regulator.

02 — Key specifications

Datasheet parameters

Parameter	Min	Typ	Max	Conditions
output voltage	—	—	50 V	—
output current	—	—	3.5 A	(Note 1)
supply voltage range	4.5 V	—	44 V
rds on	—	600 mOhm	800 mOhm	Tj = 25°C, Forward direction(High side + low side)Iout = 1.5 A
operating temperature	-40 °C	—	85 °C	—
power dissipation	—	—	2.85 W	(Note 2)
propagation delay	—	500 ns	—	IN1 and IN2 - OUT
rise time	30 ns	60 ns	120 ns	—
fall time	40 ns	80 ns	160 ns	—
driver count	—	1	—

03 — Alternatives

Closest matches to TB67H451AFNG

TB67H450FNG similar fall time, similar operating temperature, similar output current

TB67S109AFNG 2.3× lower output current, 2.0× higher propagation delay, 1.3× higher rise time

DRV8803DW 4.4× lower output current, 2.9× higher rise time, 2.4× higher operating temperature

DRV8803PWPR 2.9× higher rise time, 2.2× higher fall time, 1.6× higher propagation delay

A4988 2.3× lower output current, 1.9× lower rds on, 1.4× higher operating temperature

SZNUD3160LT1G 7.0× higher power dissipation, 1.9× higher operating temperature, 1.2× higher supply voltage range

L298N 1.8× lower output current, 1.3× lower supply voltage range

TB6612FNG 8.1× lower supply voltage range, 7.8× higher operating temperature, 3.7× lower power dissipation

04 — FAQ

Frequently asked questions

What is the driver count for the TB67H451AFNG?

The driver count is 1.

What is the fall time of the TB67H451AFNG?

The fall time is 80 ns.

What is the operating temperature of the TB67H451AFNG?

The operating temperature is 85 °C.

What is the output current?

The output current is 3.5 A (Note 1).

What is the output voltage?

The output voltage is 50 V.

What is the power dissipation of the TB67H451AFNG under the conditions specified in Note 2?

The power dissipation is 2.85 W (Note 2).

What is the propagation delay from IN1 and IN2 to OUT?

The propagation delay from IN1 and IN2 to OUT is 500 ns.

What is the rds on value for the TB67H451AFNG?

The rds on is 600 mOhm at Tj = 25°C, Forward direction(High side + low side)Iout = 1.5 A.