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部品番号 AP3970
部品説明 PRIMARY SIDE POWER SWITCHER
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AP3970 Datasheet, AP3970 PDF,ピン配置, 機能
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

--------------------------------------------
AP3970 pdf, 電子部品, 半導体, ピン配列
Pin Descriptions
Pin Number
SO-7/PDIP-7
PDIP-8
11
22
33
44
5, 6 5, 6
7
78
A Product Line of
Diodes Incorporated
AP3968/69/70
Pin Name
Function
CPC
FB
VCC
CS
C
NC
GND
This pin connects a capacitor to GND for output cable compensation
The voltage feedback from auxiliary winding
This pin receives rectified voltage from the auxiliary winding of the transformer
Current sense for primary side of transformer
This pin is connected with an internal power BJT’s collector
Not connected
This pin is the signal reference ground
Functional Block Diagram
2 (2)
FB
UVLO
0.1V COMP
pfm
OVP
&
OCkP
Tonsec
Detector
EA
VFB
Constant
Voltage
Line Voltage
Compensation
Peak
Current
Control&
LEB
Tons
VCC
3 (3)
Regulator
&
Bias
C
5,6 (5,6)
UVLO
R CV_ctrl
Q
S
pfm Driver
Tons
Constant
Current Control
Buffer
1 (1)
CPC
A(B)
A for SO-7/PDIP-7
B for PDIP-8
Cable Drop
Compensation
RQ
CC_ctrl
S
Audible
Noise
Suppression
7 (8)
4 (4)
GND
CS
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
3 of 15
www.diodes.com
December 2013
© Diodes Incorporated





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