CMD5901 Datasheet, PDF (12/14 Pages) Ceramate Technical – 4-Channel Motor Driver IC

CMD5901
4-Channel Motor Driver IC
• Short Circuit Protection function when GND and is short, ERRI become LOW and ERRO HIGH and it makes capacitor
charging. fanally AMP3 is OFF.(figure 5)
BATT
SVCC
1
30K
30.5K
AMP1
1.267V
DEDSET
AMP4
AMP5
AMP3
SCP
1.267V
COSC
Figure 3. DC/DC Converter Control Circuit
Switching off time depen on a capacitor of the SCP . and the equation is as follow.
t
=
C_SCP
×
-^V----^T----^H--
I_SCP
(V_TH = 1.25V, I_SPRT = 10µA)
• Max Duty can be controlled resistor. the equation is as follow.
t = C_DEDSET × R
(R = 65KΩ)
• Capacitor of the SCP terminal can control disable switiching time and it can be calculated by as follow equation.
t
=
C_SCP
×
---^V----^T---^H-----
I_STOP
(V_TH = 1.25V, I_OFF = 20µA)
• Over Voltage Protection BATT Voltage is over 9.7V charging SCP terminal Capacitor, it reach to VTH SW terminal signal
is OFF the equation is as follow
t
=
C_SCP
×
V_-----T---H--
I_HV
(V_TH = 1.25V, I_HV = 20µA)
• If Output Voltage of RSTOUT Circuit DC/DC Conver is over than 90%, RSTOUT terminal turn to HIGH and Hysteresis is
50mV. and RSTOUT stste is ON.
7. Empty Detecting Circuit.
EMPSET
Detect Voltage
LOW
2.2V
HIGH-Z
1.8V
Hysteresis
50mV
50mV
Mode
Battery Mode
Adapter Mode
8. Battery Charging Circuit
• the battery charger circuit is separated from any other block .
• TSD operate at 150°C. Hysteresis is 30°C
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
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Rev 1.0 Dec.12, 2002