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參數資料
| 型號： | AS2214 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Primary Side PWM Controller |
| 中文描述： | 一次側PWM控制器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 53K |
| 代理商： | AS2214 |
ASTEC Semiconductor
Description
The AS2214 is a full featured, pulse width modulation
controller. Based on an improved AS3842, the AS2214
provides additional features that reduce component count
and improve specifications in a wide range of power supply
designs. The added functionality includes AC power and
bulk voltage sensing, over-voltage input, as well as the ability
to latch off or bounce through different fault conditions.
The PWM function is controlled by the current sense com-
parator for normal current mode control and a second
comparator for voltage mode soft start. A buffered RAMP
signal is available for slope compensation without loading
the oscillator. The output stage is a high current totem pole
output that sees only 85 ns delay from the PWM comparator.
The AS2214 requires less than 10
μ
A of startup current. The
undervoltage lockout (UVLO) thresholds are nominally 13.8V
for turn on and 8 V for turn off. A precision 2.5 V bandgap
reference serves as an input for the error amplifier. The
oscillator discharge current is trimmed to provide guaran-
teed duty cycle clamping.
AS2214
Primary Side PWM Controller
Features
Low Startup Current
Bulk and AC sensing
Soft Start
Single-start or auto-restart
modes
Oscillator trimmed for precision
duty cycle clamp
Standard temperature range
extended to 105
°
C
Remote on / off control
Buffered Ramp for slope
compensation
Standard current mode control
Pin Configuration
—
Top view
Ordering Information
Package Temperature Range Order Code
14-Pin Plastic DIP
0 to 105
°
C AS2214N
12
1
V
CC
OUT
11
2
V
REG
GND
10
3
COMP
BOK
9
4
V
FB
LEN
8
5
ISNS
ACP
6
SS
OV
7
RAMP
RT/CT
14
13
83
相關PDF資料 |
PDF描述 |
|---|---|
| AS2214N | Primary Side PWM Controller |
| AS2316D | Secondary Side Housekeeping Circuit |
| AS23xx | Secondary Side Housekeeping Circuit |
| AS2316 | Secondary Side Housekeeping Circuit |
| AS2316N | Secondary Side Housekeeping Circuit |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AS2214N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Primary Side PWM Controller |
| AS22150FLF | 制造商:TT Electronics / IRC 功能描述:AS22150FLF |
| AS22150HLF | 制造商:TT Electronics / IRC 功能描述:AS22150HLF |
| AS22151FLF | 制造商:TT Electronics / IRC 功能描述:AS22151FLF |
| AS22151HLF | 制造商:TT Electronics / IRC 功能描述:AS22151HLF |
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