am4961 BCD Semiconductor Manufacturing Limited, am4961 Datasheet - Page 13

• Manufacturer Part Number: am4961
• Description: Ingle Phase Full Wave Direct Pwm Motor Driver
• Manufacturer: BCD Semiconductor Manufacturing Limited

Typical Application (Continued)
Note 7:
*1. Ground Line Layout
PGND is connected to motor supply stage and GND is
connected to control stage. All ground lines from control
stage are connected to GND.
*2. Stability of Power Supply
C1 is employed to stabilize V
than 1µF.
*3. Hall Input
To avoid noise, the shortest line is recommended to con-
nect with Hall stage which has about 20mV hysteresis.
Thus, the ideal Hall input is 50mV or over.
*4. COSC Capacitor
When C
*5. FG Output
FG output terminal is open collector output which varies
with phase change.
*6. RD Output
RD output terminal is open collector output. It is low at
rotation mode and high when stopped.
Jun. 2008 Rev. 2. 2
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
CP
is 100pF, the COSC frequency will be 25kHz.
CC
. Its capacitance is no less
13
*7. HB Pin
This pin is available to output a 1.25V Hall bias voltage.
*8. VMIN Pin
If this pin is disused, connect it directly with VPWM, the
minimum duty cycle will be 10%.
*9. Exposed Pad (For TSSOP-20(EDP) package only)
There is an exposed pad at the bottom of IC. If operating
current is high, it is recommended to solder external
heatsink closely with this pad by tin to ensure better tem-
perature characteristics.
BCD Semiconductor Manufacturing Limited
EXPOSED
PAD
*9
Data Sheet
AM4961