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What is AP3968?

This electronic component, produced by the manufacturer "Diodes", performs the same function as "PRIMARY SIDE POWER SWITCHER".


AP3968 Datasheet PDF - Diodes

Part Number AP3968
Description PRIMARY SIDE POWER SWITCHER
Manufacturers Diodes 
Logo Diodes Logo 


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A Product Line of
Diodes Incorporated
AP3968/69/70
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.
Features
Primary Side Control for Eliminating Opto-coupler and Secondary
CV/CC Control Circuitry
Built-in NPN Transistor with 700VCBO
Low Start-up Current: 0.2A (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. GreenDevice (Note 4)
Applications
Chargers
Adapters
Set Top Boxes
Auxiliary Supplies
DVD
LED Driver
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. See http://www.diodes.com/quality/lead_free.html for 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
CPC 1
FB 2
VCC 3
CS 4
7 GND
6C
5C
SO-7 (M Package)
For AP3968
(Top View)
CPC 1
FB 2
VCC 3
CS 4
7 GND
6C
5C
PDIP-7 (P7 Package)
For AP3969/70
CPC 1
FB 2
VCC 3
CS 4
8 GND
7 NC
6C
5C
PDIP-8 (P Package)
For AP3970
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
1 of 15
www.diodes.com
December 2013
© Diodes Incorporated

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AP3968 equivalent
A Product Line of
Diodes Incorporated
AP3968/69/70
Electrical Characteristics (@VCC=15V, TJ=+25°C, unless otherwise specified.)
Symbol
Parameters
UVLO SECTION
VON Turn-on Voltage
VOFF
Turn-off Voltage
STANDBY CURRENT SECTION
IST Start-up Current
ICC Operating Current
FEEDBACK INPUT SECTION
VFB FB Threshold Voltage
IFB FB Pin Input Current
POWER TRANSISTOR SECTION
VCE(SAT)
Collector-emitter Saturation Voltage
hFE DC Current Gain
ICEO Leakage Current
OVER TEMPERATURE PROTECTION
TSHDN
Shutdown Temperature
Temperature Hysteresis
Conditions
No drive Current
VCC=VON-0.5V
VFB=4V
AP3968/69: IC=0.5A
AP3970: IC=1A
AP3968/69
AP3970
Min
13
4.5
320
4.23
1.5
14
17
+125
Typ
15
5.3
0.2
435
4.3
3.5
17
26
+160
+40
Max
17
6.3
0.6
550
4.37
5.5
Unit
V
V
μA
V
μA
0.3 V
––
––
60 nA
°C
°C
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
5 of 15
www.diodes.com
December 2013
© Diodes Incorporated


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