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AP3988 Datasheet Download - Diodes

Номер произв AP3988
Описание PRIMARY SIDE POWER SWITCHER
Производители Diodes
логотип Diodes логотип 



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AP3988 Даташит, Описание, Даташиты
A Product Line of
Diodes Incorporated
AP3988/89/90
PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
Description
The AP3988/89/90 is a performance enhanced power switcher for
power supplies with better conversion efficiency, better voltage &
current accuracy, and improved protection functions. Typical
applications include charger, adapter for ADSL, home appliance
power supply, LED lighting power supply and PC auxiliary power
supplies. The controller regulates the output voltage and current in
the primary side by piece-wise Pulse Frequency Modulation (p-
PFM) in discontinuous conduction mode (DCM). The system
operating frequency reduces linearly from heavy load to light load
in each interval of the p-PFM, and enters constant current mode
when the load current equals to the maximum system output
current.
Pin Assignments
(Top View)
CPC 1
FB 2
VCC 3
CS 4
7 GND
6C
5C
SO-7 (M Package) For AP3988
The AP3988/89/90 provides operating frequency dithering function
to improve EMC performance of power supply. The AP3988/89/90
also has built-in fixed cable voltage drop compensation (5% of
nominal system output voltage) and adjustable line voltage
compensation.
The AP3988/89/90 solution has fewer component number, smaller
size, and lower total cost.
The AP3988 is packaged in SO-7. The AP3989/90 is packaged in
PDIP-7.
(Top View)
CPC 1
FB 2
7 GND
VCC 3
CS 4
6C
5C
PDIP-7 (P7 Package) For AP3989/90
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
Hiccup Function to Improve Short Circuit Protection
Better Over Voltage Protection
Better Over Temperature Protection
Low Total Cost Solution
Output Power Range (Note 1):
AP3988 for 5.5W Adapter
AP3989 for 8W Adapter
AP3990 for 12W Adapter
Totally Lead-free & Fully RoHS Compliant (Note 2 & 3)
Halogen and Antimony Free. GreenDevice (Note 4)
Applications
Adapters
Set Top Boxes
Auxiliary Supplies
Appliances
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.
AP3988/89/90
Document number: DS36722 Rev. 3 - 2
1 of 13
www.diodes.com
March 2014
© Diodes Incorporated







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AP3988 Даташит, Описание, Даташиты
Typical Applications Circuit
A Product Line of
Diodes Incorporated
AP3988/89/90
Rf1 D1 to D4
L1
J1
AC 90-264V
C2 +
C10
+
C1
R3
C5
R6
R10
D5
D6
+
C3
R5
C11 R11
L2
Vo+
Np
D12 +
+
R12
Ns
T1
Nfb
C12 C13 Vo-
U1
VCC C
C8 CPC GND
CS FB
R7
R8
R9
For AP3990 (12V/1A)
Item
C1,C2
C3
C5
C8
C10
C11
C12, C13
D1 to D6
D12
L1
L2
Function
10µF/400V, electrolytic
4.7µF/50V, electrolytic
1nF/250V, ceramic
0.1µF, 0805
1nF/250VAC, Y1 capacitor
1nF, 0805
470µF/16V
1N4007, rectifier diode
MBR3100, Schottky diode
15mH, Common inductor, EE10
10µH/1A, inductor, 0805
QTY
2
1
1
1
1
1
2
6
1
1
1
Item
U1
Rf1
R3
R5
R6
R7
R8
R9
R10
R11
R12
T1
Function
AP3990, PDIP-7
2A/250V, fuse
3.3M/0.25W
3.9, 0805
150k, 0.25W
0.62, 1206
31k, 0805
13k, 0805
360, 0805
27, 0805
1.2k, 0805
EE20 core, PC40, transformer
QTY
1
1
1
1
1
1
1
1
1
1
1
1
AP3988/89/90
Document number: DS36722 Rev. 3 - 2
2 of 13
www.diodes.com
March 2014
© Diodes Incorporated







No Preview Available !

AP3988 Даташит, Описание, Даташиты
Pin Descriptions
Pin Number
1
2
3
4
5, 6
7
Pin Name
CPC
FB
VCC
CS
C
GND
A Product Line of
Diodes Incorporated
AP3988/89/90
Function
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
This pin is the signal reference ground
Functional Block Diagram
VCC
0.05V
2
FB
COMP
OVP
OCkP
Output Short
OTP
Max Tonp
Rcs Short
OSC
tOSC
PFM
tONS, NL and LL
Detector
tONS
NL
LL
Pro
3
Regulator
&
Bias
LL UV
NL
Vload
UV
Dynamic
Response Dyn
Constant Voltage Control
VFB_ref
Cable Compensation
Vload
CV_ctrl
(LL+NL)Bar
DetectON
RQ
S
Detect
Pulse
tosc NL LL
Line
Comp.
CS
tONS
VCSN(N=1,2,3)
Peak Current Control
LEB
Frequency Dither
VCSN Select
Vload CV_M
UV DetectON
Constant Current
Control
Shutdown
Pre_Shutdown
RQ
S
CC_ctrl
UVLO
PFM
Vally
ON
Driver
7
GND
5, 6
C
VCSN(N=1,2,3)
AP3988/89/90
Document number: DS36722 Rev. 3 - 2
CPC Vload
1
CPC
3 of 13
www.diodes.com
4
CS
March 2014
© Diodes Incorporated










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