CONTROLLER. AP1680 Datasheet

AP1680 CONTROLLER. Datasheet pdf. Equivalent


Part Number

AP1680

Description

LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

Manufacture

BCD Semiconductor

Total Page 9 Pages
Datasheet
Download AP1680 Datasheet


AP1680
Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
General Description
Features
AP1680
The AP1680 is a high performance AC/DC power sup- · Primary Side Control for Rectangular Constant
ply controller for LED drivers, battery charger and
Current and Constant Voltage Output
adapter applications. The device uses Pulse Frequency · Sub-microampere Start-up Current
Modulation (PFM) method to build discontinuous con-
duction mode (DCM) flyback power supplies.
·
·
30mW No-load Input Power Feasible
Tight CC Regulation Performance
The AP1680 provides accurate constant voltage, con-
stant current (CV/CC) regulation while removing the
·
Eliminates Opto-coupler and Secondary CV/CC
Control Circuitry
opto-coupler and secondary control circuitry. It also · Eliminates Control Loop Compensation Circuitry
eliminates the need of loop compensation circuitry · Flyback Topology in DCM Operation
while maintaining stability. The AP1680 achieves · Random Frequency Modulation to Reduce
excellent regulation and high average efficiency, yet
System EMI
meets the requirement for no-load consumption less · Built-in Soft Start
than 30mW.
· Open Feedback Protection
The AP1680 is available in SOT-23-6 package.
· Short Circuit Protection
· SOT-23-6 Package
Applications
· LED Drivers
· Adapters/Chargers for Cell/Cordless Phones,
PDAs, MP3 and Other Portable Apparatus
· Standby and Auxiliary Power Supplies
Apr. 2011 Rev. 1. 0
SOT-23-6
Figure 1. Package Type of AP1680
BCD Semiconductor Manufacturing Limited
1

AP1680
Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
Pin Configuration
AP1680
K6 Package
(SOT-23-6)
Pin 1 Dot by Marking
OUT 1
GND 2
VCC 3
6 FB
5 GND
4 CS
Figure 2. Pin Configuration of AP1680 (Top View)
Pin Description
Pin Number
1
2, 5
3
4
6
Pin Name
OUT
GND
VCC
CS
FB
Function
This pin drives the base of external power NPN switch
Ground
Supply voltage
The primary current sense
The voltage feedback from the auxiliary winding
Apr. 2011 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
2


Features Preliminary Datasheet LOW-POWER OFF-LIN E PRIMARY SIDE REGULATION CONTROLLER G eneral Description Features AP1680 T he AP1680 is a high performance AC/DC p ower sup- · Primary Side Control for R ectangular Constant ply controller for LED drivers, battery charger and Curr ent and Constant Voltage Output adapte r applications. The device uses Pulse F requency · Sub-microampere Start-up Cu rrent Modulation (PFM) method to build discontinuous conduction mode (DCM) fl yback power supplies. · · 30mW No-l oad Input Power Feasible Tight CC Regul ation Performance The AP1680 provides accurate constant voltage, constant cur rent (CV/CC) regulation while removing the · Eliminates Opto-coupler and Se condary CV/CC Control Circuitry opto-c oupler and secondary control circuitry. It also · Eliminates Control Loop Com pensation Circuitry eliminates the nee d of loop compensation circuitry · Fly back Topology in DCM Operation while m aintaining stability. The AP1680 achieves · Random Frequency Modulatio.
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