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PDF IS31LT3929 Data sheet ( Hoja de datos )
| Número de pieza | IS31LT3929 | |
| Descripción | Flyback configuration LED driver | |
| Fabricantes | ISSI | |
| Logotipo |  |
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IS31LT3929
Preliminary
Flyback configuration LED driver with integrated PFC and no feedback
General Description
Features
The IS31LT3929 is a primary side, peak current
mode, isolated type HBLED driver. The device
works at a constant frequency in discontinuous
conduction mode to provide a constant power to the
input. It eliminates the need for an opto-coupler,
TL431, or any other type of secondary side feedback.
It operates from an input voltage range of 85VAC to
265VAC.
The IS31LT3929 integrates over current/voltage
protection, as well as includes a thermal shutdown to
halt the switching action in the case of abnormally
high operating temperatures.
• Power factor correction to > 0.9
• 3% typical current accuracy
• No loop compensation required
• Wide input voltage range: 85V to 265VAC
• Internal over-temperature protection
Applications
• AC/DC constant current LED driver
• General AC/DC power supply
• General LED Lighting
Typical Operating Circuit
Fuse BD
85~265Vac
C1
R1
R3
TR
C3 R5
D1
C2
R2 R4
U1 3929
VCC
VSINE
FSET
NC
GATE http://www.DataSheet4U.net/
CS
FB
GND
Q1
Rcs
D4
C6
LED1
R8
LEDn
D3
C4
D2
R6
C5
R7
Figure 1 Typical Operating Circuit
Copyright © 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time
without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised
to obtain the latest version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the
product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not
authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 4/2/2012
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
IS31LT3929
Block Diagram
Vsupply
Preliminary
Rin
VDD
10uF
CS
VSINE
FB
CT
OPT
vdda
Voltage Regulator
4.5V
30V OVP
ovp
17.5V
0.6V
ocp
CMP1
AGC
CMP1
ZCD
Valley Detec
R
S
GATE driver logic
Function
Switch
OSC
GND
Por
UVLO
http://www.DataSheet4U.net/
Driver
NMOS
GATE
Rcs
Integrated Silicon Solution, Inc. – www.issi.com
Rev. A, 4/2/2012
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet IS31LT3929.PDF ] | |
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