Data Sheet

TB67S279FTG
2017-09-15
14
12. FLIM (AGC Frequency limit) function
The FLIM pin sets the bottom frequency limit for the AGC to be active. It can reduce the resonance frequency of the motor
start in using AGC. The FLIM pin is a 4 stated logic input.
Note: Built-in digital filter of 0.625 μs (±20%) is adopted to FLIM pin.
FLIM Function
VCC short
Frequency limit: ON, AGC is invalid when fCLK is below 675 Hz
VCC-100 kΩ pull-up
Frequency limit: ON, AGC is invalid when fCLK is below 450 Hz
GND-100 kΩ pull-down
Frequency limit: ON, AGC is invalid when fCLK is below 225 Hz
GND short
FLIM: OFF
Note: Resistance accuracy should be within ±20%.
The frequency in the table above is in the case of full step resolution. Frequency limit threshold depends on the step
resolution setting.
FLIM 1/1 1/2 (a) 1/2 (b) 1/4 1/8 1/16 1/32
VCC short
675 Hz 1.35 kHz 1.35 kHz 2.7 kHz 5.4 kHz 10.8 kHz 21.6 kHz
VCC-100 kΩ pull-up
450 Hz 900 Hz 900 Hz 1.8 kHz 3.6 kHz 7.2 kHz 14.4 kHz
GND-100 kΩ pull-down 225 Hz 450 Hz 450 Hz 900 Hz 1.8 kHz 3.6 kHz
7.2 kHz
GND short
FLIM: OFF
Note: Resistance accuracy should be within ±20%.
13. LTH (AGC detection threshold) function
The LTH pin sets the AGC detection threshold. Connect a 100 kΩ pull-down resistor to GND.
LTH Function
GND-100 kΩ pull-down
Standard configuration for AGC detection threshold
Note: Resistance accuracy should be within ±20%.