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PDF MXT7261 Data sheet ( Hoja de datos )
| Número de pieza | MXT7261 | |
| Descripción | Primary Side Feedback Single-stage Active PFC LED Driver IC | |
| Fabricantes | ETC | |
| Logotipo |  |
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MXT7261
Primary Side Feedback Single-stage Active PFC LED Driver IC
Description
Features
MXT7261 is a single-stage, with the source power z Single stage cascade, source power factor
factor correction, high-precision primary side
adjust, high PF value, low THD
feedback LED constant current control IC, which
z Primary feedback constant current control,
can be applied to 85Vac-265Vac full range input
no need secondly feedback circuit
voltage flyback isolated LED constant current
z Very high speed to LED start up(<200ms
powerThis controller integrates active power
@85Vac)
factor correction circuit, which can achieve high
z ±3% LED output constant current precision
power factor and low total harmonic distortion.
z Excellent linear voltage adjust rate and load
Due to operating in inductor current critical
voltage adjust rate
continuous mode, power MOS transistor is at
z Inductance current critical continue mode
zero current turn on condition, the switching loss
z Source drive mode
can be reduced, while the utilization of
z Very low (20Ua) start up current
transformer can be increased.
z Very low (600uA) work current
MXT7261 uses a proprietary current sampling
z FB feedback resistance value is high, low
system with the primary feedback mode，which
power
can achieve high precision output constant
z LED short / open circuit protection
current control without secondary feedback circuit, z Current samples collect resistance short /
so it can not only save the cost and bulk, but also
open protect
improve the system reliability. In order to achieve z Transformer full protect
the low loss of primary side and the ultrafast
z By-cycle primary side current limiting
system power and LED start-up, the IC uses the
z IC provide voltage over / under voltage
patent soured driving technology and an internal
protect
rapid charge circuit.
z Over temperature protection
MXT7261 use the patent linear voltage
z Automatic restart function
compensation technology and load voltage
z Available in SOP-8 package
compensation technology, which can achieve
excellent linear voltage regulation load voltage
regulation. Moreover, linear voltage
compensation factor can also be flexible
adjustment of the external device.
MXT7261 has multi-protecti on functions, to increase
Application
the system reliability. It concludes open circuit
z GU10 / E27 LED bulb lamp, searchlight
protection, short circuit protection, over voltage
z LED PAR30, PAR38 lamp
protection, under voltage protection, open circuit
z LED day light lamp
protection, short circuit protection of current
z Others LED light
sampling resistor, by-cycle current limiting, and
over temperature protection. All protection status
has the automatic restart function.
REV：A0_W
2012-10-15
1
1 page  
VCOMP
COMP linear voltage range
MXT7261
1.5 3.5 V
VCOMP_OVP
Output short, COMP check
threshold
4.5 V
Linear voltage samples collect
VLN
Drive
LN linear work range
RDS_ON
Inner drive MOS electric VCC=14V
resistance
0
2.5 V
mΩ
Over temperature protect
TSD Over temperature
down temperature
shut
150 ℃
TSD_HYS
Over temperature protect
delay
30 ℃
Note 4, type parameter value is test in 25℃,
Note 5, the max and min in the spec are confirmed by the test. The type value is confirmed by the design,
test and statistical analyses.
Internal Structure Diagram
Figure3 MXT7261 Internal Structure Diagram
REV：A0_W
2012-10-15
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MXT7261.PDF ] | |
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