Build with TB67S109A — Datasheet Specs & AI Design Help

00 — Overview

What the TB67S109A does

The TB67S109AFTG and TB67S109AFNG are two-phase bipolar stepping motor drivers utilizing a PWM chopper and built-in clock decoder. These devices operate with a 50 V/4.0 A rating, featuring a low on-resistance of 0.49Ω and a chopping frequency customizable via external components. They support full, half, quarter, and finer step operations while providing thermal shutdown and over-current protection. The integrated monolithic IC includes a VCC regulator and error detection signals to ensure reliable motor control in industrial applications.

Next step

Start building with TB67S109A → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for TB67S109A
Parameter	Min	Typ	Max	Conditions	Source
quiescent current (abs max)	—	2.5 mA	5 mA	VCC = 5.0V; vcc	Toshiba datasheet, p. 25
output voltage	—	—	50 V		Toshiba datasheet, p. 23 — Calculation of the OSCM oscillation frequency (chopper reference fre…
output current	—	—	4 A		Toshiba datasheet, p. 23 — Calculation of the OSCM oscillation frequency (chopper reference fre…
supply voltage range (abs max)	—	2 V	3.6 V	vref; Caution) Absolute maximum ratings	Toshiba datasheet, p. 23 — Caution) Absolute maximum ratings
rds on (abs max)	—	490 mOhm	600 mOhm	Tj = 25°C, Forward direction(High-side+Low-side); (h+l); Caution) Absolute maximum ratings	Toshiba datasheet, p. 24 — Caution) Absolute maximum ratings
operating temperature	-20 °C	—	85 °C		Toshiba datasheet, p. 23 — Calculation of the OSCM oscillation frequency (chopper reference fre…
clock frequency (abs max)	—	—	100 kHz	Caution) Absolute maximum ratings	Toshiba datasheet, p. 23 — Caution) Absolute maximum ratings
power dissipation	—	—	1.3 W		Toshiba datasheet, p. 23 — Calculation of the OSCM oscillation frequency (chopper reference fre…
fall time	40 ns	90 ns	140 ns	AC Electrical Specification Timing chart	Toshiba datasheet, p. 26 — AC Electrical Specification Timing chart
driver count	—	2	—		Toshiba datasheet, p. 1

02 — Alternatives

Closest matches to TB67S109A

TB67H450FNG 2.2× higher power dissipation, 2.0× lower propagation delay, 1.9× higher supply voltage range

TB67H451AFNG 2.2× higher power dissipation, 2.0× lower propagation delay, 1.9× higher supply voltage range

DRV8803 17.1× higher supply voltage range, 2.7× lower output current, 2.2× higher rise time

DRV8803PWPR 17.1× higher supply voltage range, 2.2× higher rise time, 2.0× lower output current

DRV8803DW 17.1× higher supply voltage range, 2.7× lower output current, 2.2× higher rise time

DRV8825 13.3× higher supply voltage range, 2.0× higher quiescent current, 2.0× lower rds on

DRV8833 3.4× higher supply voltage range, 2.7× lower output current, 2.4× lower rds on

DRV8837 4.4× lower output current, 2.8× higher supply voltage range, 1.7× lower rds on

03 — FAQ

Frequently asked questions

What is the absolute maximum rating for the clock frequency?

The absolute maximum rating for the clock frequency is 100 kHz.

What is the driver count for the TB67S109AFNG?

The driver count is 2.

What is the fall time specified in the AC Electrical Specification Timing chart?

The fall time is 90 ns.

What is the maximum operating temperature for the TB67S109AFNG?

The operating temperature is 85 °C.

What is the output current of the TB67S109AFNG?

The output current is 4 A.

What is the maximum output voltage?

The output voltage is 50 V.

What is the power dissipation of the TB67S109AFNG?

The power dissipation is 1.3 W.

What is the quiescent current when VCC = 5.0V?

The quiescent current is 2.5 mA at VCC = 5.0V.

What is the rds on value for the TB67S109AFNG at Tj = 25°C, Forward direction(High-side+Low-side); (h+l)?

The rds on is 490 mOhm.

What is the supply voltage range for the TB67S109AFNG at vref under Absolute maximum ratings?

The supply voltage range is 2 V.