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參數(shù)資料
| 型號(hào)： | HV9221 |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | High Frequency Multi-Function Current Mode PWM Controller(輸入范圍15V-450V，高頻多功能電流型脈寬調(diào)制控制器) |
| 中文描述： | 高頻多功能電流模式PWM控制器（15V的輸入范圍- 450V，高頻多功能電流型脈寬調(diào)制控制器） |
| 文件頁(yè)數(shù)： | 1/5頁(yè) |
| 文件大?。?/td> | 38K |
| 代理商： | HV9221 |
14-38
General Description
The Supertex HV9221 is a dual high-speed Current Mode Switch-
ing Power Supply controller that can start and run directly from
almost any DC input from 15 volts DC to rectified and filtered 240
volt AC line. This unique input circuit allows the HV9221 to self-
start directly from a high voltage input, and subsequently take the
power from an auxiliary converter output which it is controlling,
thus allowing very efficient operation while maintaining input-to-
output galvanic isolation limited only by the insulation system of
the associated magnetic assembly. When powered by the auxil-
iary converter outputs or with both outputs disabled (oscillator
shuts down) the input current on the +V
IN
pin is reduced to a
maximum of 50
μ
A which is beneficial especially in telecommuni-
cation applications.
HV9221
High Frequency Multi-Function
Current Mode PWM Controller
Device
28-pin DIP
SOW-28
Die
HV9221
HV9221P
HV9221WG
HV9221X
Ordering Information
Package Options
Operating Modes
1. Single push-pull converter.
2. Dual 49% duty cycle controller with 180
°
phasing.
3. Dual 99% duty cycle controller with 180
°
phasing.
Advanced Information
Absolute Maximum Ratings*
+V
IN
, Input Voltage
V
CC
, Supply Voltage
Operating Temperature Range
-0.5V to +450V
-0.5V to +15.5V
-40
°
C to +85
°
C
-65
°
C to +150
°
C
Storage Temperature Range
Power Dissipation @ 25
°
C
SOW-28
1.0W
28-pin DIP
1.2W
Note
:
*All voltages are referenced to GND.
Features
Current-mode control
15 to 450 volt input range internal start-up circuit
50
μ
A standby supply current
2mA operating supply current
Under-voltage lockout
Internal soft start
1% tolerance band gap voltage reference
1.5 MHz low offset error amplifier
1 MHz oscillator
High current output drivers (1.5A peak, 0.5A continuous)
Driver outputs have low output impedance with V
CC
= 0V
Current sense leading edge threshold switching
Fast (25 nsec) over current shutdown
Buffered slope compensation ramp generators
Fault tolerant single pin synchronization of multiple
converters
All pins are ESD protected
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