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HV9904LG 参数 Datasheet PDF下载

HV9904LG图片预览
型号: HV9904LG
PDF下载: 下载PDF文件 查看货源
内容描述: HV9904多功能转换器控制器 [HV9904 Multi Converter Controller]
分类和应用: 转换器控制器
文件页数/大小: 5 页 / 100 K
品牌: SUPERTEX [ Supertex, Inc ]
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HV9904
Preliminary Engineering Specification
HV9904 Multi Converter Controller
Features
Eliminates High Voltage Input Electrolytic Capacitor
Smallest and Most Reliable Off-Line Solution
Constant Current or Constant Voltage Mode Control
Can be Operated Directly from Rectified AC Mains
10V to 400V Input Range Internal Regulator
1.5mA Operating Supply Current
PLL Based Loop Control with Soft Start
On-Time Varies Inversely with Input Voltage
Frequency Varies with Load
2.5V Differential Sense
Recommended for <10W Applications
General Description
The Supertex HV9904 is a second order PWM controller designed
to provide a constant average current output or a constant average
voltage output from an input of 10V to 400V DC or directly from
rectified AC mains up to 280V. The second order topology is
capable of extremely high dynamic control range, allowing
operation directly from rectified AC mains without the need for
bulky and expensive high voltage input electrolytic capacitor.
The PWM control utilizes feed forward circuitry to compensate for
large variations in input voltage (i.e. rectified AC) and a novel
integrator lock loop PLL scheme to regulate a differentially sensed
feedback node where the signal may be discontinuous. This
feedback node could be a current sense resistor or divider from
regulated output voltage. For a constant load the switching
frequency will be nearly constant with a dither of a few kHz helping
to meet FCC conducted emissions requirements.
A high input voltage linear regulator provides a stable Vdd supply
for the internal circuitry and gate drive to the external MOSFET.
Under voltage lockout provides a power on reset and protection for
the MOSFET
Dice
HV9904X
Applications
Universal Input Voltage LED driver
Constant Current Source
Battery Charger
Ordering Information
8 Pin Plastic DIP
HV9904P
Package Options
8 Pin SOIC
HV9904LG
Typical Application Circuit
Universal Input Constant Average Currrent LED Lamp Power Supply
1N4007
D1 D2
10VDC to 400VDC
or
VAC to 265V
D4
D3
D5
MURS120T3
D6
MURS120T3
L2
220uH
C3
0.01uF
L1
1mH
D7
MURS120T3
C4
0.1uF
10mA
1 to 8
LEDs
C1
0.1uF
400V
U1
Vdd
C2
1uF
GATE
NS
HV9904
PS
PGND
+Vin
M1
VN2460N8
or
IRFBC30AS
R1
250
AGND
Prepare by Telecom Group
1
Rev. D
3/29/2002
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com