參數(shù)資料
型號(hào)： ISL6173DRZA-T
廠商： Intersil
文件頁(yè)數(shù)： 10/20頁(yè)
文件大小： 453K
描述： IC CTRLR HOT SWAP DUAL LV 28-QFN
標(biāo)準(zhǔn)包裝： 6,000
類型： 熱交換控制器
應(yīng)用： 通用
內(nèi)部開(kāi)關(guān)： 無(wú)
電源電壓： 2.25 V ~ 3.63 V
工作溫度： 0°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 28-QFN 裸露焊盤（5x5）
包裝： 帶卷 (TR)
10
FN9186.3
January 3, 2006
automatically retries to turn on the MOSFET after a wait
period, during which C
T
 is charged and discharged 64 times
and the retry attempt takes place on the 65th time. This wait
period allows the MOSFET junction to cool down.
2. Way Overcurrent (WOC) Mode - This mode is designed 
to handle very fast, very low impedance shorts on the load
side, which can result in very high di/dt. Typically, the current
limit set for this mode is 300% of the current regulation limit.
This mode uses a very fast comparator, which directly looks
at the voltage drop across R
SNS
 and pulls the gate very
quickly to GND (as shown in Figure 14) and immediately
releases it. If the WOC is still present, the IC enters current
regulation mode and the rest of the current regulation
behavior follows as described earlier in undercurrent
regulation mode.
Additionally, as shown in the block diagram, there is also an
OC comparator, which also looks at the Rsense voltage
drop. When this drop exceeds the Current Limit set point, it
triggers the timeout circuit, which starts ticking and CTx is
allowed to charge. If the current limit condition remains in
effect until after the time-out period expires (CTx voltage
exceeding 1.178V), the gate of the MOSFET is pulled down,
the SSx capacitor is discharged, FLT
 is asserted and a new
SS sequence is allowed to begin after ENx
 recycle or by
keeping the RTR
/LTCH pin pulled low.
The voltage on OCREF pin is the same as the internal band-
gap reference voltage, which is 1.178V (nominal). A resistor
to GND from this pin sets the reference current (and hence
the reference voltage) for the current limit amplifier and
OC/WOC comparators. The current regulation (CR) duration
is set by the capacitor on CT pin to GND. Once the voltage
on this pin reaches 1.178V, the CR duration expires. Fault
(FLT
) pin goes active (pulls low), signaling the load of a fault
condition and the gate (GT) pin gets pulled low.
Retry vs Latched Fault Operational Modes:
RTR
/LTCH pin dictates the IC behavior after the gate (GT)
pin pulls down following OC timeout expiration. If the
RTR
/LTCH pin is left floating, the gate pin will remain latched
off. It can only be released by de-asserting and reasserting
the enable (EN
) input. If RTR
/LTCH pin is pulled to GND,
then the Retry mode will be activated. In this mode the IC will
automatically attempt to turn-on the MOSFET after a delay,
determined by the capacitor on CT pin. In the Retry mode,
the internal logic charges and discharges the CT cap 64
times during wait period. On the 65th time, the FLT output
clears during retry attempt. If the overcurrent condition
persists after the soft-start, the CT pin will again start
charging and the process repeats.
Bias and Charge Pump Voltages:
The BIAS pin feeds the chip bias voltage directly to the first
of the two internal charge pumps, which are cascaded. The
output of the first charge pump, in addition to feeding the
second charge pump, is accessible on the CPVDD pin. The
voltage on the CPVDD pin is approximately 5V. It also
provides power to the POR and band-gap circuitry as shown
in the block diagram. A capacitor connected externally
across CPQ+ and CPQ- pins of the IC is the flying cap for
the charge-pump.
The second charge-pump is used exclusively to drive the
gates of the MOSFETs through the 24礎(chǔ) current sources,
one for each channel. The output of this charge pump is
approximately 10V as shown in the block diagram.
Tracking
Q
Rsns
3K
Rset
-
+
Io
Iset
Vin
Vo
+
-
+
-
ISL6173
25&
WOC
COMPARATOR
GATE
PULLDOWN
CURRENT
FIGURE 14. WOC OPERATION
CH1: V
O
1, CH2: V
O
2, T = 2ms/DIV, C
SS
 = 0.066礔
FIGURE 15. TRACKING MODE WAVEFORMS
ISL6173
相關(guān)PDF資料
PDF描述
ISL6174IRZ IC CIRC BREAKER DUAL LV 28-QFN
ISL61861DCBZ IC USB PWR CTRLR 3A 8SOIC
ISL6402IR IC REG TRPL BCK/LINEAR 28-QFN
ISL6413IRZ-TK IC REG TRPL BCK/LINEAR 24-QFN
ISL6432CB-T IC REG QD BCK/LINEAR 16-SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL6173EVAL1 功能描述:EVALUATION BOARD FOR ISL6173 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
ISL6173EVAL3 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual Low Voltage Hot Swap Controller
ISL6174 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual Low Voltage Circuit Breaker
ISL6174IRZ 功能描述:IC CIRC BREAKER DUAL LV 28-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
ISL6174IRZ-T 功能描述:IC CIRC BREAKER DUAL LV 28-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
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

*
*
*