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PDF AP3703 Data sheet ( Hoja de datos )
| Número de pieza | AP3703 | |
| Descripción | LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER | |
| Fabricantes | BCD Semiconductor Manufacturing Limited | |
| Logotipo |  |
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
General Description
Features
AP3703
The AP3703 is a high performance AC/DC power sup- · Primary Side Control for Rectangular Constant
ply controller for battery charger and adapter applica-
Current and Constant Voltage Output
tions. The device uses Pulse Frequency Modulation · Secondary CV/CC Control Circuitry Eliminating
(PFM) method to build discontinuous conduction
Opto-Coupler
mode (DCM) flyback power supplies.
· No Need for Control Loop Compensation
The AP3703 provides accurate constant voltage, con-
stant current (CV/CC) regulation while removing the
opto-coupler and secondary control circuitry. It also
eliminates the need of loop compensation circuitry
·
·
Circuitry
Flyback Topology in DCM Operation
Random Frequency Modulation to
System EMI
Reduce
while maintaining stability. The AP3703 achieves · Built-in Soft Start
excellent regulation and high average efficiency, yet · Open Feedback Protection
meets the requirement for no-load consumption less · Over Voltage Protection
than 100mW.
· Short Circuit Protection
The AP3703 is available in SOT-23-5 package.
· Small SOT-23-5 package to achieve compact size
and less component
Applications
· Adapters/Chargers for Cell/Cordless Phones,
PDAs, MP3 and Other Portable Apparatus
· Standby and Auxiliary Power Supplies
· LED Driver
Feb. 2009 Rev. 1.0
SOT-23-5
Figure 1. Package Type of AP3703
BCD Semiconductor Manufacturing Limited
1
1 page  
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER AP3703
Electrical Characteristics
(VCC=15V, TA=25oC, unless otherwise specified.)
Parameter
Symbol
Conditions
UVLO SECTION
Start-up Threshold
VTH (ST)
Minimal Operating Voltage
VOPR(min)
STANDBY CURRENT SECTION
Start-up Current
IST
VCC = VTH (ST)-0.5V,
Before start-up
Operating Current
DRIVE OUTPUT SECTION
ICC(OPR) Static
OUT Maximum Current Sink
Source
CURRENT SENSE SECTION
IOUT
Current Sense Threshold
VCS
Pre-Current Sense
VCS(PRE)
Leading Edge Blanking
Min Typ Max Unit
16.5 19.5 22.5
6.5 8 9.5
V
V
45 60 µA
240 300 µA
50 mA
24 30 36
450 485 530 mV
350 395 440 mV
430 ns
FEEDBACK INPUT SECTION
Feedback Pin Input Leakage
Current
IFB
VFB=4V
2.3 2.7 3.1 µA
Feedback Threshold
Enable Turn-on Voltage
Over Voltage Protection
VFB
VFB(EN)
VFB(OVP)
3.65 3.95 4.25
-2.0 -1.5 -1.0
6.4 8 9.6
V
V
V
Feb. 2009 Rev. 1.0
BCD Semiconductor Manufacturing Limited
5
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BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
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11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AP3703.PDF ] | |
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