XN1049 반도체 회로 부품 판매점
Switch Power Supply PWM Controller
|
|
 Innuovo |
XN1049 Switch Power Supply PWM Controller
XN1049 Switch Power Supply PWM Controller
General Description
XN1049 which is optimized for high performance is a
highly integrated current mode PWM control IC. It is
applied for switch power of the small-sized and
medium-sized for example the power adaptor. For
lower the standby power and higher RoHS compliant,
the IC has the Burst Mode function and very low
startup current and working current. At the condition
of no load or light load, the IC operates in extended
‘burst mode’ to minimize switching loss by lower the
switching frequency. The low startup current and low
operating current contribute to a reliable power on
startup design with XN1049. A large value resistor
could thus be used in the startup circuit to minimize
the power consumption and improve the efficiency of
the power convent.
The internal synchronous slope compensation circuit
improves system large signal stability and reduces the
possible subharmonic oscillation at high PWM duty
cycle output. Leading-edge blanking on current
sense(CS) input removes the signal glitch due to
snubber circuit diode reverse recovery and thus
greatly reduces the external component count and
system cost in the design. XN1049 offers complete
protection coverage with automatic self-recovery
feature including over current protection cycle by
cycle (OCP), over load protection (OLP), under
voltage lockout (UVLO). The gate-driven output is
clamped to maximum 18V to protect the external
MOSFET. Excellent EMI performance is achieved by
using the frequency jitter and the soft-switching at the
totem-pole-gate-drive output. The tone energy at
below 20KHZ is minimized in the design and audio
noise is eliminated during operation. The IC can be
used as the best alternative products of the linear
power supply or the RCC-mode power to improve the
whole performance of the switch power system and
lower the cost. XN1049 is offered in SOT23-6, SOP-8
and DIP-8 packages.
Features
Extended burst mode control for improving
efficiency and minimum standby power
Low startup current(4uA)
Low operation current(1.4mA)
Leading edge blanking was built in
Synchronous slope compensation was built in
Current mode operates
External programmable PWM switching
frequency
Over current protection cycle by cycle(OCP)
Good protection coverage with auto self-
recovery
VDD over voltage clamp and under voltage
lockout with hysteresis (UVLO)
Maximum gate-drive output clamped voltage
(18V)
Frequency jitter
Constant limited output power
Over load protection(OLP)
Free audio noise operation
◎Xi’an Innuovo Microelectronics Co., Ltd.
DS.XN1049V1.0
Page 1
June, 2008
Free Datasheet http://www.Datasheet4U.com
XN1049 Switch Power Supply PWM Controller
Applications
Universal switch power supply and offline AC/DC
flyback converter:
Battery Charger
Power Adaptor
Set-Top Box Power Supplies
Open-frame SMPS
Typical Application Circuit
Pin Definition and Device Marking
1
GND
6
GATE
2
FB
3
RI
SOT23-6
5
VDD
4
SENSE
1
GATE
2
VDD
3
NC
4
SENSE
DIP8
SOP8
8
GND
7
FB
6
NC
5
RI
◎Xi’an Innuovo Microelectronics Co., Ltd.
DS.XN1049V1.0
49: XN1049
Y: Year Code
WW：Week Code
Page 2
X: D = DIP8 ， S = SOP8
P: P = Pb-free package
Y: Year Code (0-9)
WW: Week Code (1-52)
X: Area Code
V: Internal Version Code (1-9)
June, 2008
Free Datasheet http://www.Datasheet4U.com
|
PDF 파일 내의 페이지 : 총 9 페이지
제조업체: Innuovo
( innuovo )
XN1049 controller
데이터시트 다운로드 :
[ XN1049.PDF ]
[ XN1049 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
XN1042
Current Mode PWM Controller - ETC
XN1042
Switching power supply controller IC - Innuovo
XN1043
Switching power supply controller IC - Innuovo
XN1049
Switch Power Supply PWM Controller - Innuovo