Diodes AP3968/69/70 User Manual
Description, Applications, Features
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
1 of 15
December 2013
© Diodes Incorporated
AP3968/69/70
A Product Line of
Diodes Incorporated
CPC
FB
VCC
CS
C
C
GND
1
2
3
4
7
6
5
1
2
3
4
8
7
6
5
CPC
FB
VCC
CS
C
C
GND
NC
PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
Description
The AP3968/69/70 consists of a primary side regulation controller and
a high voltage transistor, and is specially designed for off-line power
supplies within 12W output power. Typical applications include
adapter for ADSL and auxiliary supplies.
The AP3968/69/70 operates at pulse frequency modulation (PFM),
and provides accurate constant voltage, constant current (CV/CC)
regulation without requiring an opto-coupler and secondary control
circuitry. It has internal cable compensation function for tight constant
voltage regulation.
The AP3968/69/70 solution has fewer component numbers, smaller
size, and lower total cost.
The AP3968 is packaged in SO-7. The AP3969 is available in PDIP-
7. The AP3970 is available in PDIP-7 and PDIP-8 packages.
Applications
Chargers
Adapters
Set Top Boxes
Auxiliary Supplies
DVD
LED Driver
Features
Primary Side Control for Eliminating Opto-coupler and Secondary
CV/CC Control Circuitry
Built-in NPN Transistor with 700V
CBO
Low Start-up Current: 0.2
A (Typ.)
Internal Output Cable Voltage Drop Compensation
Random Frequency Modulation for Low EMI
Short Circuit Protection
Low Total Cost Solution
Output Power Range (Note 1):
AP3968 for 5W Adapter
AP3969 for 7.5W Adapter
AP3970 for 12W Adapter
Totally Lead-free & Fully RoHS Compliant (Note 2 & 3)
Halogen and Antimony Free.
“Green” Device (Note 4)
Notes:
1. Typical continuous power in a non-ventilated enclosed adapter measured at +50°C ambient.
2. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
3
. Seer more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
4. Halogen- and Antimony-
free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Pin Assignments
(Top View)
SO-7 (M Package) PDIP-7 (P7 Package) PDIP-8 (P Package)
For AP3968 For AP3969/70 For AP3970
1
2
3
4
7
6
5
CPC
FB
VCC
CS
C
C
GND