TB6596FLG Toshiba, TB6596FLG Datasheet - Page 10

• Manufacturer Part Number: TB6596FLG
• Manufacturer: Toshiba

Specifications of TB6596FLG

• Function: Driver
• Vopmax (vm*): 5.5V (6V)
• Io (lpeak): 0.6A (0.8A)
• Channel: 6-ch
• I/f: serial input
• Option: Const current x2
• Package: QON36
• Rohs Compatible†: yes

Charge Pump Circuit
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Input Pins:
pin is pulled up to V
All input pins (CK, DATA, LD, PWME, PWMF, STBY, CLK) have a pull-down resistor of about 200 kΩ. The FGIN
Consisting of CMOS transistors, this charge pump achieves a high resolution of the speed control signal.
The gain of the speed discriminator can be internally selected from eight combinations of charging and
discharging current values (±10 to 80 µA). And the total control gain is determined by adjusting the charge pump
current and the time constant of the external integrator.
When the motor is not rotating, this circuit remains in discharge mode (−50 µA). Thus, the amount of charge
stored in a capacitor of the external integrator becomes zero resetting the analog control value.
Since the FG signal is not generated immediately after the PWME drive signal assertion due to the stationary
motor, the speed control loop is not enabled at this time. Therefore, the forced commutation signal (Duty cycle =
100%) is applied as a motor driving signal for a short period of time from the rising edge of the PWME signal.
For powering off, the motor operation of a certain period of time after the falling edge of the PWM signal can be
selected from the brake and the reverse-plus-brake modes.
* The motor startup time can be selected from 64 options (0 to 63) in 2.048-ms steps by a 6-bit serial
* The reverse rotation time can be selected from 64 options (0 to 63) in 2.048-ms steps by a 6-bit serial
command.
command.
CC
via a pull-up resistor of about 200 kΩ.
Integrator
CK, DATA, LD, PWMA, B, C, D, PWMF, STBY, CLK
DVO
Input
To control
V
CC
amp
200 kΩ
10
V
I1
I1
CC
Charge signal
Discharge signal
V
GND
CC
Speed discriminator
TB6596FLG
2008-01-29