Diodes AP3968, AP3969, AP3970 User Manual
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
1 of 15
www.diodes.com
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
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: 0.2A (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. “Green” Device (Note 4)
1
2
3
4
7
6
5
CPC
FB
VCC
CS
C
C
GND
PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
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
SO-7 (M Package) PDIP-7 (P7 Package) PDIP-8 (P Package)
For AP3968 For AP3969/70 For AP3970
(Top View)
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
2 of 15
www.diodes.com
December 2013
© Diodes Incorporated
AP3968/69/70
A Product Line of
Diodes Incorporated
+
J1
AC 90-264V
D1 to D4
C2
R1
+
C1
D6
L1
T1
FB
C
VCC
CS
+
C3
U1
CPC
C8
R5
C11
Np
Ns
Nfb
D5
C5
R6
Vo+
Vo-
C10
GND
L2
D12
+
C12
R11
R12
C13
+
R10
R3
R8
R9
R7
Item
Function
QTY
Item
Function
QTY
C1
10.0F/400V, electrolytic
1
U1
AP3969
1
C2
4.7F/400V, electrolytic
1
R1
11, 2W
1
C3
3.3F/50V, electrolytic
1
R3
3.3M/0.25W
1
C5
1nF/1kV, ceramic
1
R5
3.9, 0805
1
C8
0.01F, 0805
1
R6
150k, 1206
1
C10
1nF/250Vac, Y1 capacitor
1
R7
1, 1206
1
C11
1nF, 0805
1
R8
20k, 0805
1
C12, C13
470F/16V
2
R9
13k, 0805
1
D1 to D6
1N4007, rectifier diode
6
R10
360, 0805
1
D12
MBR3100
1
R11
27, 0805
1
L1
470H, inductor
1
R12
1.2k, 0805
1
L2
Bead, 0805
1
T1
EE16 core, PC40, transformer
1
Typical Applications Circuit
Typical Application of AP3969 (9V/800mA)
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AP3968/69/70
A Product Line of
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Pin Number
Pin Name
Function
SO-7/PDIP-7
PDIP-8
1
1
CPC
This pin connects a capacitor to GND for output cable compensation
2
2
FB
The voltage feedback from auxiliary winding
3
3
VCC
This pin receives rectified voltage from the auxiliary winding of the transformer
4
4
CS
Current sense for primary side of transformer
5, 6
5, 6
C
This pin is connected with an internal power BJT’s collector
–
7
NC
Not connected
7
8
GND
This pin is the signal reference ground
Regulator
&
Bias
OVP
&
OCkP
0.1V
V
FB
pfm
Tons
UVLO
COMP
EA
UVLO
CV_ctrl
pfm
Driver
R
Q
S
R
Q
S
Tons
CC_ctrl
FB
CS
CPC
VCC C
GND
Cable Drop
Compensation
Constant
Voltage
Peak
Current
Control&
LEB
Constant
Current Control
Tonsec
Detector
Line Voltage
Compensation
Audible
Noise
Suppression
Buffer
1 (1)
2 (2)
3 (3)
4 (4)
5,6 (5,6)
7 (8)
Pin Descriptions
Functional Block Diagram
A(B)
A for SO-7/PDIP-7
B for PDIP-8
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AP3968/69/70
A Product Line of
Diodes Incorporated
Symbol
Parameter
Rating
Unit
VCC
Supply Voltage
-0.3 to 22
V
VFB
FB Input Voltage
-1 to 10
V
V
CBO
Collector-emitter Voltage
700
V
–
Collector DC Current
AP3968/69
1.5
A
AP3970
4
TJ
Operating Junction Temperature
+150
°C
T
STG
Storage Temperature
-65 to +150
°C
T
LEAD
Lead Temperature (Soldering, 10 sec)
+300
°C
–
ESD (Machine Model)
200
V
–
ESD (Human Body Model)
2000
V
PD
Total Power Dissipation
AP3968
0.7
W
AP3969
0.9
AP3970
1.1
Symbol
Parameter
Min
Max
Unit
VCC
Supply Voltage
–
22
V
TOP
Operating Temperature Range
-40
+85
°C
f
(MAX)
Maximum Operating Frequency
–
60
kHz
Symbol
Parameter
Value
Unit
θ
JA
Junction to Ambient
AP3968
100
°C/W
AP3969
80
AP3970
65
θ
JC
Junction to Case
AP3968
50
AP3969
40
AP3970
35
Absolute Maximum Ratings (Note 5)
Note 5: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Thermal Impedance
AP3968/69/70
Document number: DS36759 Rev. 2 - 2
5 of 15
www.diodes.com
December 2013
© Diodes Incorporated
AP3968/69/70
A Product Line of
Diodes Incorporated
Symbol
Parameters
Conditions
Min
Typ
Max
Unit
UVLO SECTION
VON
Turn-on Voltage
–
13
15
17
V
V
OFF
Turn-off Voltage
No drive Current
4.5
5.3
6.3
V
STANDBY CURRENT SECTION
IST
Start-up Current
VCC=VON-0.5V
–
0.2
0.6
μA
ICC
Operating Current
–
320
435
550
FEEDBACK INPUT SECTION
VFB
FB Threshold Voltage
–
4.23
4.3
4.37
V
IFB
FB Pin Input Current
VFB=4V
1.5
3.5
5.5
μA
POWER TRANSISTOR SECTION
V
CE(SAT)
Collector-emitter Saturation Voltage
AP3968/69: IC=0.5A
AP3970: IC=1A
– – 0.3
V
hFE
DC Current Gain
AP3968/69
14
17 – –
AP3970
17
26 – –
I
CEO
Leakage Current
–
– – 60
nA
OVER TEMPERATURE PROTECTION
T
SHDN
Shutdown Temperature
–
+125
+160 – °C
–
Temperature Hysteresis
–
–
+40 – °C
Electrical Characteristics (@V
=15V, TJ=+25°C, unless otherwise specified.)
CC
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