ka3038 Fairchild Semiconductor, ka3038 Datasheet - Page 12

• Manufacturer Part Number: ka3038
• Description: 4-channel Motor Drive Ic
• Manufacturer: Fairchild Semiconductor

FAN8038B(KA3038)
• Short Circuit Protection function when GND and is short, ERRI become LOW and ERRO HIGH and it makes capacitor
Switching off time depen on a capacitor of the SCP . and the equation is as follow.
• Max Duty can be controlled resistor. the equation is as follow.
• Capacitor of the SCP terminal can control disable switiching time and it can be calculated by as follow equation.
• Over Voltage Protection BATT Voltage is over 9.7V charging SCP terminal Capacitor, it reach to V
• If Output Voltage of RSTOUT Circuit DC/DC Conver is over than 90%, RSTOUT terminal turn to HIGH and Hysteresis is
7. Empty Detecting Circuit.
8. Battery Charging Circuit
• the battery charger circuit is separated from any other block .
• TSD operate at 150 C. Hysteresis is 30 C
12
t
charging. fanally AMP3 is OFF.(figure 5)
is OFF the equation is as follow
50mV. and RSTOUT stste is ON.
t
=
t
=
t
C
=
=
C
DEDSET
C
SCP
C
EMPSET
HIGH-Z
SCP
SCP
LOW
V
----------
I
HV
TH
-------------- -
I
----------- -
I
V
STOP
V
SCP
R
TH
TH
V
R
TH
V
=
V
TH
65K
=
TH
1.25V, I
=
=
1.25V, I
Detect Voltage
1.25V, I
Figure 3. DC/DC Converter Control Circuit
HV
2.2V
1.8V
SPRT
=
OFF
20 A
=
=
20 A
10 A
Hysteresis
50mV
50mV
Adapter Mode
Battery Mode
Mode
TH
SW terminal signal