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PDF AP4305 Data sheet ( Hoja de datos )
| Número de pieza | AP4305 | |
| Descripción | CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER | |
| Fabricantes | BCD Semiconductor | |
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Preliminary Datasheet
CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
AP4305
General Description
Features
The AP4305 is a highly integrated solution for a con-
stant voltage/constant current mode SMPS application.
The AP4305 contains one 1.21V voltage reference
with ± 0.5% accuracy, one current sensing circuit and
two operational amplifiers. Combining the voltage ref-
erence with one operational amplifier makes AP4305
an ideal voltage controller for use in adapters and bat-
tery chargers. The other low voltage reference com-
bined with the other operational amplifier makes it an
ideal current limiter for output low side current sens-
ing.
· Constant Voltage and Constant Current Control
· Precision Internal Voltage Reference
· Few External Components
· Easy Compensation
Applications
· Adapters
· Battery Chargers
The AP4305 is available in SOT-23-6 package.
www.DataSheet4U.com
Sep. 2005 Rev. 1. 1
SOT-23-6
Figure 1. Package Type of AP4305
BCD Semiconductor Manufacturing Limited
1
1 page  
Preliminary Datasheet
CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305
Electrical Characteristics
(VCC=5V, TA=25oC, unless otherwise specified.)
Parameter
Symbol
Conditions
TOTAL CURRENT CONSUMPTION
Total Supply Current
Not Including the Output Sinking
Current
VOLTAGE CONTROL LOOP
ICC TA=25oC
-40oC<TA<105oC
Transconduction Gain (VCTRL).
Sink Current Only
Voltage Control Loop Reference
Input Bias Current (VCTRL)
CURRENT CONTROL LOOP
Gmv
VREF
IIBV
TA=25oC
-40oC<TA< 105oC
TA=25oC
-40oC<TA< 105oC
TA=25oC
-40oC<TA< 105oC
Transconduction Gain (ICTRL).
Sink Current Only
Gmi TA=25oC
Current Control Loop Reference
Current Out of Pin ICTRL at
200mV
OUTPUT STAGE
VSENSE
IIBI
IOUT=2.5
mA
TA=25oC
-40oC<TA< 105oC
TA=25oC
-40oC<TA< 105oC
Low Output Voltage at 10mA
Sinking Current
VOL
TA=25oC
Output Short Circuit Current.
TA=25oC
Output to VCC. Sink Current Only IOS
-40oC<TA< 105oC
Min Typ Max Unit
0.5 1
0.6
mA
1 3.5
2.5
mA/mV
1.204 1.21 1.216
1.186
1.234
V
50
nA
100
1.5 7
mA/mV
198 200 202
192 208
25
50
mV
µA
200
27 50
35
mV
mA
Sep. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AP4305.PDF ] | |
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