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| 型號(hào)： | AS2214 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Primary Side PWM Controller |
| 中文描述： | 一次側(cè)PWM控制器 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 53K |
| 代理商： | AS2214 |
AS2214
Primary Side PWM Controller
ASTEC Semiconductor
86
Pin Function Description
Pin Number
Function
Description
1
V
CC
Positive supply voltage for the IC.
2
V
REG
Output of 5V series regulator.
3
COMP
This pin is the error amplifier output. Typically used to provide loop compensation to
maintain V
FB
at 2.5 V.
4
V
FB
Inverting input of the error amplifier. The non-inverting input is a trimmed 2.5 V
bandgap reference.
5
ISNS
A voltage proportional to inductor current is connected to this pin. The PWM uses this
information to terminate the gate drive of the output.
6
SS
This pin provides a 6
μ
A current source to linearly charge an external capacitor. This pin
is compared to the RAMP pin in the soft start comparator, terminating output pulses when
RAMP goes above the SS voltage.
7
RAMP
This pin is a level-shifted and buffered oscillator signal used to provide slope compensa-
tion to the current sense signal. The pin also serves as the non-inverting input of the soft-
start comparator.
8
RT/CT
Oscillator frequency and maximum duty cycle are set by connecting a resistor (R
T
) to
VREG and a capacitor (C
T
) to ground.
9
OV
This pin latches SS low when pulled above 2.5 V. The latch can be reset by pulling
OV above 4 V then back to ground.
10
ACP
This pin detects the presence of AC signal and drives LEN high.
11
LEN
This pin must be high to enable starting. The pin can also clear all latches by going low
then high.
12
BOK
This pin monitors the bulk voltage through a resistor divider and, when BOK exceeds
2.5 V, provides a 50
μ
A current source for hysteresis. When BOK drops below 2.5V, SS
is pulled low and the hysteresis current is turned off. Auto-restart after a brown-out is
possible.
13
GND
Circuit common ground.
14
OUT
This totem pole output is designed to directly drive a power MOSFET switch capable of
sourcing and sinking peak currents up to 1 A.
相關(guān)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(guān)代理商/技術(shù)參數(shù) |
參數(shù)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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