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Diodes Semiconductor Electronic Components Datasheet

AL6562A Datasheet

Transition Mode PFC LED Controller

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AL6562A pdf
AL6562A
Description
Features
Transition Mode PFC LED Controller
The AL6562A is a current mode Power Factor Correction Controller
and is designed for operating in Transition Mode. With a superior
linear performance multiplier, it ensures the device operates over a
wide input voltage range with superior THD (Total Harmonics
Distortion). The output voltage is controlled by means of an error
amplifier and a precise (1% @ TJ = +25°C) internal voltage reference.
The AL6562A is designed to meet stringent energy-saving standards
with low start-up current, and can operate with low current
consumption when entering stand-by mode.
OVP circuitry increases system robustness, allowing the device to
withstand transient caused at start-up and during load-disconnects.
Single Stage PFC Controller
Transition Mode Operation
Low Start-Up, Operating and Quiescent Currents
Internal Start-Up Timer
Enable/Disable Function on INV Input
Totem Pole, Push-Pull Output Drive
Adjustable Output Overvoltage Protection
SO-8 : Available in GreenMolding Compound (No Br, Sb)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(Top View)
INV 1
8 Vcc
COMP 2 AL6562A 7 GD
MULT 3
6 GND
CS 4
5 ZCD
SO-8
Applications
Electronic Single-Stage LED Driver
PFC pre-regulators for:
IEC61000-3-2 compliant SMPS (Flat TV,
monitors, desktop PC, games)
HI-END AC-DC adapter/charger up to 350W
Electronic ballast
Entry level server & web server
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.
Typical Applications Circuit
L 2 160 H
F1
2.5A/ 250V
L 1 C1
500 H 220nF/275V
NTC
JC 1
85 to 265V AC
L N GND
R3
D 1 1M
C2
220nF
500V
C3
330nF
500V
R4
680K
R5
10K
L3
R 6 180K
R 7 180K
D3
1N 4148
C6 R8
12nF 100
R14
12K
R9
Z1 68K
18V
ZCD COMP
VCC
C7
680nF
C8
330nF
R13
INV 10
GD
C10
22 F
25V
MULT
C4
100nF
GND
CS
U1
AL6562A
D 2 MUR460
R1
820K
R2
470K
JC 2
Q1
11N65C3
R10
8.2K
C9
47F
450V
R16
0.33/1W
Figure 1 High Power Factor Boost application circuit
AL6562A
Document Number: DS38122 Rev. 1-2
1 of 16
www.diodes.com
September 2015
© Diodes Incorporated



Diodes Semiconductor Electronic Components Datasheet

AL6562A Datasheet

Transition Mode PFC LED Controller

No Preview Available !

AL6562A pdf
AL6562A
Pin Descriptions
Pin Number Pin Name
1 INV
2 COMP
3 MULT
4 CS
5 ZCD
6 GND
7 GD
8 VCC
Brief Description
Inverting Input Pin of the Internal Error Amplifier.
This pin is connected externally via a resistor divider from the regulated output voltage. It can provide
input to inverting input of internal error amplifier. This pin can also be used as ENABLE/DISABLE
control input.
Output from Error Amplifier.
A feedback compensation network consisting of resistor and capacitor connects between INV (Pin1)
and this pin to reduce the bandwidth and achieve stability of the voltage control loop and ensure high
power factor and low THD.
Input to the Internal Multiplier.
This pin connects to the rectified mains voltage through external resistor divider to provide a sinusoidal
voltage reference for the control current loop.
Current Sense Connecting to External Resistor for Current Feedback.
The current flowing in the MOSFET is sensed through a resistor, the resulting voltage is applied to this
pin and compared with an internal sinusoidal-shaped reference generated by the multiplier to determine
MOSFET’s turn-off. This pin has an internal Leading-Edge-Blanking of about 200 nanoseconds to
improve noise immunity.
Zero Current Detection.
This pin takes input from inductors demagnetization sensing to achieve zero current detection, required
for Transition Mode (TM) operation. A negative-going edge triggers turn-on of MOSFET.
System Ground.
Ground for circuit. Current return for both the signal circuitry and the gate drive stage.
Gate Driver Output.
This pin is able to drive external MOSFET. The totem-pole output stage is able to drive MOSFET with a
peak current of 600mA/800mA for source and sink capability respectively. The high level voltage of this
pin is internally clamped at about 12V to avoid excessive gate voltage in case VCC pin is supplied by a
higher voltage.
System Power Input Pin.
This pin is for supply voltage of both the signal part and gate driver of the IC. Upper limit is extended to
a maximum of 22V to provide more headroom for supply voltage changes. This pin has an internal 25V
Zener to protect the IC itself from overvoltage transients.
Functional Block Diagram
INV
VCC
COMP
MULT
CS
1
INV_Disable
2
3
Multiplier
4
40K
Voltage
0.47 V/0.3V Regulation
Overvoltage
Detection
8
24V
In ter na l
R1 Supply 7.5V
UVL O
INV_Disable
1.7V
RQ
S
10 pF
VCC
Driver
7
R2 Vref
ZCD_Disable
2.1V
1.6V
5
Zero Current
Detector
Upper &
Lower
Clamp
St arter
6
ZCD
GND
GD
AL6562A
Document Number: DS38122 Rev. 1-2
2 of 16
www.diodes.com
September 2015
© Diodes Incorporated



Diodes Semiconductor Electronic Components Datasheet

AL6562A Datasheet

Transition Mode PFC LED Controller

No Preview Available !

AL6562A pdf
AL6562A
Absolute Maximum Ratings (Note 4)
Symbol
Description
Value
Unit
VCC IC Supply Voltage
Self Limited
V
Icc Operating Supply Current
30 mA
VINV,VCOMP,VMULT
IZCD (Note 5)
Input/Output of Error Amplifier, Input of Multiplier
Zero Current Detector Max. Current
-0.3 to 7
Source: -50
Sink: 10
V
mA
mA
ESD(HBM)
ESD (Human Body Model)
3000
V
ESD(MM)
ESD (Machine Model)
200 V
TJ Junction Temperature Range
-40 to +150
°C
TSTG
Storage Temperature Range
-65 to +150
°C
PTOT
RθJA
Power Dissipation
Thermal Resistance (Junction Ambient)
0.65 W
150 °C/W
Notes:
TLEAD
Lead Temperature (Soldering, 10 sec)
+260
°C
4. Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
5. Currents flowing into device pins are considered as positive and out of device pins are considered as negative.
AL6562A
Document Number: DS38122 Rev. 1-2
3 of 16
www.diodes.com
September 2015
© Diodes Incorporated




Part Number AL6562A
Description Transition Mode PFC LED Controller
Maker Diodes
Total Page 16 Pages
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