參數(shù)資料
型號(hào)： IR1110
廠商： International Rectifier
英文描述： SOFT START CONTROLLER IC
中文描述： 軟起動(dòng)控制器芯片
文件頁(yè)數(shù)： 19/32頁(yè)
文件大小： 227K
代理商： IR1110
19
IR1110
ADVANCE INFORMATION
www.irf.com
After the above delay, the Voltage Dip Comparator is reset when the output of the Timing
Wave Intersect Comparator goes high, which occurs when the line voltage returns to normal. Q2
is momentarily turned ON, allowing the voltage on C
HOLD
to reset. Q4 is turned ON, unclamping
the Ramp, and Q5 is turned OFF, unclamping C
ERR
. Ramp-back of the bus voltage now occurs.
When the output of the Voltage Dip Comparator is low, Q1 is turned OFF. R
PKD
is then
disconnected from ground, allowing C
PK
to hold its charge during the voltage dip.
Voltage Dip during Dynamic Regulation
If |V
BREF
| is rapidly decreased by a sufficient amount, this may cause a decrease of bus
voltage that will set the Voltage Dip Comparator and cause the bus voltage to undershoot.
Since the timing waves are still present, the output of the Timing Wave Intersect Com-
parator remains high, and the Voltage Dip Comparator will be quickly reset, ramping the bus
voltage back to the set value.
This undershoot of the bus voltage will be avoided if changes in |V
BUSREF
| are controlled at
a rate that does not significantly
“
overtake
”
the discharge rate of C
HOLD
, which is set by C
HOLD
,
R
DIP1
and R
DIP2
.
Undervoltage and Undervoltage Lockout Comparators
The UV Comparator delivers a high output when V
DD
exceeds the internally fixed
reference value.
The UV Lockout Comparator delivers a high output when the voltage C
UVLO
exceeds a
nominal value of about 1.5V. C
UVLO
is driven from a current source of approximately 2uA.
The outputs of the UV and UV Lockout Comparators are ANDed. When the output of
either comparator is low, the SCR firing pulses are inhibited, and Q4 is turned OFF, clamping
the ramp.
One Phase Loss Circuit
A train of fixed duration (nominal 2msec) pulses are delivered to the gate of Q6, if one
input phase is missing. With 1-phase shutdown enabled, each 1-phase loss pulse discharges
C
UVLO
by about 1.5V. During the third successive pulse, C
UVLO
is discharged sufficiently that the
output of the UV Lockout Comparator goes low.
The principle of generation of the 1-phase loss pulses is illustrated in Figure 8. These
pulses are generated;
(a) during one phase loss
(b) briefly during abnormal dips of line voltage
(c) if the DC bus is short circuited and the SCR firing angle is advanced by more than about 30
°
from the zero crossing of the line voltage
With 1-phase shutdown enabled, generation of
“
1-phase loss
”
pulses under condition (b)
reinforces the ramp clamp function. Under condition (c) it results in automatic limiting of short
circuit current, as explained later.
The 1-phase loss pulses at 1PHLED output follow the output of the 1-Phase Loss Circuit.
相關(guān)PDF資料
PDF描述
IR1175 Synchronous Rectifier Driver
IR140CSP Flipky
IR2103 HALF-BRIDGE DRIVER
IR2103S HALF-BRIDGE DRIVER
IR3311 PROGRAMMABLE CURRENT SENSING HIGH SIDE SWITCH
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IR11-21C 制造商:Everlight Electronics Co 功能描述:LED IrLED 940nm 2-Pin Chip LED Box 制造商:Everlight Electronics Co 功能描述:IRED, , 1206, SMD - Tape and Reel
IR11-21C/TR8 功能描述:紅外發(fā)射源 Infrared LED RoHS:否 制造商:Fairchild Semiconductor 波長(zhǎng):880 nm 射束角:+/- 25 輻射強(qiáng)度: 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:Side Looker 封裝:Bulk
IR11-21C-TR8 制造商:EVERLIGHT 制造商全稱:Everlight Electronics Co., Ltd 功能描述:Infrared LED With Inner Lens
IR11452SPBF 功能描述:IC PFC ONE CYCLE CONTROL 8SOIC RoHS:是 類別:未定義的類別 >> 其它 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* 其它名稱:MS305720A
IR11452STRPBF 功能描述:功率因數(shù)校正 IC 9999V 999A SOIC RoHS:否 制造商:Fairchild Semiconductor 開(kāi)關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*