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參數(shù)資料
| 型號： | IP9001 |
| 廠商： | INTERPION SEMICONDUCTOR CO.,LTD. |
| 英文描述： | 4-CH MOTOR DRIVE IC FOR PORTABLE CDP |
| 中文描述： | 4通道馬達(dá)驅(qū)動電路的便攜式CDP |
| 文件頁數(shù)： | 14/32頁 |
| 文件大?。?/td> | 643K |
| 代理商： | IP9001 |
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IP9001
4-CH MOTOR DRIVE IC FOR PORTABLE CDP
September. 2003
(Rev.0)
- 14 -
www.interpionsemi.com
APPLICATION SUMMARY (Continued)
-
Short circuit protection
When the output voltage of error amp holds
“
H
”
status, then IP9001 starts charging to
“
CSPRT
”
with
constant current
“
ISPRT
”
.
If the voltage of the CSPRT rises above 1.2V, then the DC/DC converter circuit is disabled.
Disable time is dependent on the external capacitor
“
CSPRT
”
, Threshold voltage
“
VTH
”
, and internal
constant current source
“
ISPRT
”
.
* VTH=1.2V, ISPRT=10uA
(sec)
V TH
ISP R T
t
C SP R T
=
×
-
Soft start circuit
IP9001 accomplishes soft-start-function by attaching external capacitor between DEAD pin and GND.
Maximum duty can be changed by adding external resistor to DEAD pin (pin 4).
(
int
Re
)(sec)
t
CDEAD
R
xt
=
×
+
* Rint=65K ohm, Rext=external resistor
-
Power off function
When the input voltage of OFF(pin40) is low, then IP9001 starts charging to
“
CSPRT
”
with
constant current
“
IOFF
”
.
If the voltage of the CSPRT rises above 1.2V, then the DC/DC converter circuit is disabled.
Disable time is dependent on the external capacitor
“
CSPRT
”
, Threshold voltage
“
VTH
”
,
and internal constant current source
“
IOFF
”
.
* VTH=1.2V, IOFF=20uA
(sec)
V T H
IO F F
t
C SP R T
=
×
-
Over voltage protection
When the sensing voltage of SENS(pin1) is above 8.4V, then IP9001 starts charging to
“
CSPRT
”
with
constant current
“
IHV
”
.
If the voltage of the CSPRT rises above 1.2V, then the DC/DC converter circuit is disabled.
Disable time is dependent on the external capacitor
“
CSPRT
”
, Threshold voltage
“
VTH
”
,
and internal constant current source
“
IHV
”
.
* VTH=1.2V, IOFF=20uA
(sec)
V T H
IH V
t
C S P R T
=
×
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