tb6641fg TOSHIBA Semiconductor CORPORATION, tb6641fg Datasheet - Page 6

• Manufacturer Part Number: tb6641fg
• Description: Full-bridge Dc Motor Driver Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

I/O Equivalent Circuits
purposes.
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory
VREG (13)
VREF (16)
ALERT (1)
PWM (15)
OSC (2)
Pin No.
IN1 (3)
IN2 (5)
Digital input
L: 0.8 V (max)
H: 2 V (min)
Digital input
L: 0.8 V (max)
H: 2 V (min)
Analog input
Input range: 0 V to 3.6 V
Open-drain output
An externally attached pull-up resistor enables
the High output.
H (High-impedance):
L: Normal operation
The pin connects a capacitor for controlling the
oscillation frequency used in the PWM
constant-current control.
The oscillation frequency of the oscillator is
approximated by the following formula:
fosc = 0.42/(Cosc [F] × 10
Regulator output pin
5V(typ.)
Abnormal operation (When the UVLO, TSD,
VSD and/or ISD is activated)
I/O Signal
3
) = [Hz] (typ.)
6
VREF
IN1 (IN2)
PWM
I/O Internal Circuit
ALERT
10 k
(typ.)
RSGND
OSC
TB6641FG
VREG
2011-06-21