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PDF AP3783 Data sheet ( Hoja de datos )
| Número de pieza | AP3783 | |
| Descripción | PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER | |
| Fabricantes | Diodes | |
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AP3783
PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
Description
Pin Assignments
The AP3783 is a high performance AC/DC power supply controller for
battery charger and adapter applications. 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).
(Top View)
Pin 1 Mark
The AP3783 provides accurate constant voltage (CV), constant
current (CC) and outstanding dynamic performance without requiring
an opto-coupler. It also eliminates the need of loop compensation
circuitry while maintaining stability.
The AP3783 provides valley turn-on function, operating frequency
Jitter function (about 5.5% frequency change every 256μs) from light
to full load range and 3-segment drive current to improve the power
supply EMI performance. The AP3783 also has built-in fixed cable
voltage drop compensation (10%, 7% and 4% of nominal system
output voltage to meet various cables with different length and gauge)
and adjustable line voltage compensation.
The AP3783 is packaged in SOT26.
Applications
Adapters/Chargers
LED Lighting
Standby and Auxiliary Power Supplies
CS 1
GND 2
VCC 3
6 CPC
5 DRI
4 FB
SOT26
Features
Less than 75mW Standby Power Consumption
Meet Efficiency Requirement of COC Trier2
Valley Turn-on to Reduce Switching Loss and Improve EMI
Piece-wise Frequency Reduction to Enhance Conversion
Efficiency and Suppress Audio Noise
Over Voltage Protection (OVP)
Over Temperature Protection (OTP)
Short Circuit Protection (SCP) with Hiccup
3-Segment Drive Current for Radiative EMI Suppression
Operating Frequency Jitter Function for Conductive EMI
Suppression
Drive MOSFET for 5W to 30W Battery Charger/Adapter
Applications
SOT26 SMD Package Comply with Level 3 of IPC/JEDEC J-STD-
033A
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. 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.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP3783
Document number: DS37429 Rev. 6 - 2
1 of 17
www.diodes.com
December 2015
© Diodes Incorporated
1 page  
Electrical Characteristics (Cont.) (@VCC = 15V, TA = +25°C, unless otherwise specified.)
Symbol
Parameters
OPERATING FREQUENCY SECTION
fS(MAX)
The Maximum Operating Frequency
tOFF(MAX)
Maximum Off Time
tSAMPLE_H
tSAMPLE_M
tSAMPLE_L
Sample Time
tSAMPLE_D
FREQUENCY JITTER SECTION
ΔVCS/VCS
VCS Modulation
fMOD VCS Modulation Frequency
CURRENT SENSE SECTION
VCS_H
Peak Current Sense Threshold Voltage
VCS_M
As Above
VCS_L
As Above
VCS_D
As Above
RLINE
tLEB
Built-in Line Compensation Resistor
Leading Edge Blanking
CONSTANT VOLTAGE SECTION
VFB Feedback Voltage
RFB FB Pin Input Resistance
VCABLE
/VOUT%
Cable Compensation Ratio
CONSTANT CURRENT SECTION
tONS/tSW
Secondary Winding Conduction Duty
VALLEY-ON SECTION
tVAL-ON
Valid Off Time of Valley-on
DYNAMIC SECTION
VUV_H
Under Voltage of FB Pin for VCS_H
PROTECTION FUNCTION SECTION
VFB(OVP)
Over Voltage Protection at FB Pin
VCC(OVP)
Over Voltage Protection at VCC Pin
tONP(MAX)
Maximum Turn-on Time
VFB(SCP)
Short Circuit Protection
tSCP
Maximum Time under VFB(SCP)
TOTP
Shutdown Temperature
THYS
Temperature Hysteresis
Conditions
IO(MAX) (Note 5)
57% to 100% IO(MAX)
34% to 57% IO(MAX)
(Note 6)
5.5% to 34% IO(MAX)
(Note 6)
0% to 5.5% IO(MAX)
(Note 6)
5.5% load to 100% IO(MAX)
5.5% load to 100% IO(MAX)
57% to 100% IO(MAX)
34% to 57% IO(MAX)(Note 6)
5.5% to 34% IO(MAX)
(Note 6)
0% to 5.5% IO(MAX)
(Note 6)
(Note 7)
VCS (Note 6)
Closed loop test of VOUT
VFB=4V
AP3783A
AP3783B
AP3783C
VFB = 3.5V
From the end of tONS
–
–
–
–
VFB @ Hiccup
–
–
–
Notes:
5. The output constant-current design value, generally set to 110% to 120% of full load.
6. Guaranteed by Design.
7. Line compensation voltage on CS
reference:
Δ
VCS_ REF
0.438
R LINE
R FB1 R LINE
VAUX
Min
–
691
5.2
4.3
2.7
1.5
4.5
3.6
828
690
414
230
245
495
3.95
560
6
3
9
0.47
14.4
3.61
7.1
28
13.5
2.45
115
+144
+36
AP3783
Document number: DS37429 Rev. 6 - 2
5 of 17
www.diodes.com
Typ
–
768
5.8
4.8
3
1.7
5
4
900
750
450
250
260
550
4.01
700
7
4
10
0.5
16
3.68
7.5
30
16
2.6
128
+160
+40
AP3783
Max
60
845
6.4
5.3
3.3
1.9
5.5
4.4
972
810
486
270
275
605
4.07
840
8
5
11
0.53
17.6
3.75
7.9
32
18.5
2.75
141
+176
+44
Unit
kHz
μs
μs
μs
μs
μs
%
kHz
mV
mV
mV
mV
Ω
ns
V
kΩ
%
%
%
–
μs
V
V
V
μs
V
ms
°C
°C
December 2015
© Diodes Incorporated
5 Page 
Operation Principle Description (Cont.)
VCS_REF
VCS_H
VCS_M
VCS_L
VCS_D
Light Load
Ultra Light
Load
fSW
68KHz
Medium
Load
High Load
IO
AP3783
55KHz
50KHz
45KHz
38.9KHz
31.2KHz
24.5KHz
12KHz
5.5%
34%
57%
Full load IO(MAX) IO
Figure 4. Multiple Segment Peak Current at CV Mode
It can be seen from Figure 4, with multiple segment peak current control, AP3783 power system can achieve good audible noise performance.
3-Segment Drive Current for Radiative EMI Suppression
When the power switch is turned on, a turn-on spike will occur, that worsens the radiative EMI. It is an effective way to decrease drive current
before gate voltage gets to miller platform. The AP3783 uses 3-segment drive current for radiative EMI suppression, as shown in Figure 5.
When gate voltage gets to 6V, the AP3783 drive current switches from low current (typical: 20mA) to high current (typical: 110mA). When the
gate voltage gets to 10V, the drive current will decrease gradually to 0mA until the gate voltage goes up to the clamp voltage (13V).
AP3783
Document number: DS37429 Rev. 6 - 2
13V
Gate voltage
10V
High drive current=110mA
6.5V
Miller Platform
Drive current
Low drive current=20mA
Figure 5. Drive Current and Gate Voltage
t
11 of 17
www.diodes.com
December 2015
© Diodes Incorporated
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AP3783.PDF ] | |
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