http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



Diodes Semiconductor Electronic Components Datasheet


AL6562

Transition Mode PFC LED Controller


No Preview Available !

AL6562 pdf
AL6562
Description
Features
Transition Mode PFC LED Controller
The AL6562 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 AL6562 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 Fly-Back 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
COMP
MULT
CS
1
2
3
4
AL656 2
8 Vcc
7 GD
6 GND
5 ZCD
SO-8
(SO-8/ M Package)
Applications
Electronic Single-Stage LED Driver
PFC Pre-Regulators to meet IEC61000-3-2
High-End AC-DC Adaptor / Charger
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
Figure 1 High Power Factor Non-Isolated Constant-Current LED Driver
AL6562
Document Number: DS37542 Rev. 2 - 2
1 of 16
www.diodes.com
February 2015
© Diodes Incorporated



No Preview Available !

AL6562 pdf
AL6562
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
AL6562
Document Number: DS37542 Rev. 2 - 2
2 of 16
www.diodes.com
February 2015
© Diodes Incorporated



Part Number AL6562
Description Transition Mode PFC LED Controller
Maker Diodes - Diodes
Total Page 16 Pages
PDF Download
AL6562 pdf
Download PDF File
AL6562 pdf
View for Mobile




Featured Datasheets

Part Number Description Manufacturers PDF
AL6562 Transition Mode PFC LED Controller AL6562
Diodes
PDF
AL6562A Transition Mode PFC LED Controller AL6562A
Diodes
PDF


Part Number Start With

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

site map

webmaste! click here

contact us

Buy Components