TB6608FNG Toshiba, TB6608FNG Datasheet - Page 17

• Manufacturer Part Number: TB6608FNG
• Description: STEPPER MOTOR DRIVE, 13V 0.8A SSOP20
• Manufacturer: Toshiba

Specifications of TB6608FNG

• No. Of Outputs: 2
• Output Current: 600mA
• Output Voltage: 15V
• Supply Voltage Range: 2.7V To 5.5V, 2.5V To 13.5V
• Driver Case Style: SSOP
• No. Of Pins: 20
• Operating Temperature Range: -20°C To +85°C
• Motor Type: Stepper
• Rohs Compliant: Yes
• Function: Driver
• Vopmax (vm*): 13.5V (15V)
• Io (lpeak): 0.6A (0.8A)
• Excitation: 1/8 step
• I/f: CLK input
• Mixed Decay Mode: no
• Package: SSOP24
• Rohs Compatible†: yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2. Changing the Predefined Current to the Lower Value
During deceleration, the regulator enters fast-decay mode immediately after the end of the current decay
slope of slow-decay mode. The distortion of the current waveform can be reduced by the regenerative current
from a coil that flows back to the power supply. Two CK cycles later, the regulator exits fast decay mode and
enters Charge mode. (The fast-decay time, which is specified herein as two CK cycles, varies depending on
the mode setting. A detailed description of the mode setting is provided in the Current Decay Mode section.)
When V
the regulator exits Discharge mode and enters Charge mode. If V
however, it then reenters Discharge mode. Four CK cycles later, V
V
RF
Internal CK
< Vref, the regulator remains in Charge mode until V
GND
OSC
RF
Vref
Vref
Iout
V
RF
reaches the reference voltage (Vref), the regulator enters Discharge mode. Four CK cycles later,
Charge
Charge
Slow decay
Discharge
Fast decay
Charge
Charge
Slow decay
Discharge
17
RF
reaches Vref.
RF
Charge
Charge
RF
> Vref when it enters Charge mode,
is again compared against Vref. If
TB6608FNG
2007-12-17