參數(shù)資料
型號： ISL8102IRZ
廠商： INTERSIL CORP
元件分類： 穩(wěn)壓器
英文描述： Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
中文描述： SWITCHING CONTROLLER, PQCC32
封裝： 5 X 5 MM, ROHS COMPLIANT, PLASTIC, MO-220VHHD-2, MLFP-32
文件頁數(shù)： 13/27頁
文件大小： 711K
代理商： ISL8102IRZ
13
FN9247.0
October 19, 2005
If the R-C network components are selected such that the
R-C time constant matches the inductor L/DCR time
constant, then V
DROOP
is equal to the sum of the voltage
drops across the individual DCRs, multiplied by a gain. As
Equation 8 shows, V
DROOP
is therefore proportional to the
total output current, I
OUT
.
R
R
S
By simply adjusting the value of R
S
, the load line can be set
to any level, giving the converter the right amount of droop at
all load currents. It may also be necessary to compensate for
any changes in DCR due to temperature. These changes
cause the load line to be skewed, and cause the R-C time
constant to not match the L/DCR time constant. If this
becomes a problem a simple negative temperature
coefficient resistor network can be used in the place of
R
COMP
to compensate for the rise in DCR due to
temperature.
Output Voltage Offset Programming
The ISL8102 allows the designer to accurately adjust the
offset voltage by connecting a resistor, R
OFS
, from the OFS
pin to VCC or GND. When R
OFS
is connected between OFS
and VCC, the voltage across it is regulated to 1.5V. This
causes a proportional current (I
OFS
) to flow into the OFS pin
and out of the FB pin. If R
OFS
is connected to ground, the
voltage across it is regulated to 0.5V, and I
OFS
flows into the
FB pin and out of the OFS pin. The offset current flowing
through the resistor between VDIFF and FB will generate the
desired offset voltage which is equal to the product (I
OFS
x
R
1
). These functions are shown in Figures 8 and 9.
Once the desired output offset voltage has been determined,
use the following formulas to set R
OFS
:
For Positive Offset (connect R
OFS
to GND):
0.5 R
V
OFFSET
For Negative Offset (connect R
OFS
to VCC):
1.5 R
OFFSET
V
DROOP
--------------------
I
OUT
DCR
=
(EQ. 8)
FIGURE 7. DCR SENSING CONFIGURATION
-
+
ICOMP
DCR
L
INDUCTOR
IL
1
V
OUT
C
OUT
-
+V
L
(s)
DCR
L
INDUCTOR
IL
2
PHASE1
PHASE2
R
S
R
S
R
COMP
C
COMP
ISUM
IREF
ISL8102
-
+
V
DROOP
I
OUT
DROOP
C
SUM
(Optional)
(EQ. 9)
R
OFS
--------------------------
=
(EQ. 10)
R
OFS
--------------------------
=
E/A
FB
OFS
VCC
GND
+
-
+
-
0.5V
1.5V
GND
R
OFS
R
1
VDIFF
ISL8102
FIGURE 8. POSITIVE OFFSET OUTPUT VOLTAGE
PROGRAMMING
VREF
V
OFS
-
+
I
OFS
E/A
FB
OFS
VCC
GND
+
-
+
-
0.5V
1.5V
VCC
R
OFS
R
1
VDIFF
ISL8102
VREF
V
OFS
+
-
I
OFS
FIGURE 9. NEGATIVE OFFSET OUTPUT VOLTAGE
PROGRAMMING
ISL8102
相關(guān)PDF資料
PDF描述
ISL8102IRZ-T Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
ISL8102 Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
ISL8102EVAL1 Two-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
ISL81387 ±15kV ESD Protected, Dual Protocol (RS-232/RS-485) Transceivers(±15kV ESD保護(hù)，雙協(xié)議(RS-232/RS-485)收發(fā)器)
ISL81483 1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers(1/8 單位負(fù)載、5V、小功率、高速或帶有限斜率功能的RS-485/RS-422收發(fā)器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL8102IRZ-T 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF)
ISL8103 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Three-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
ISL8103CRZ 功能描述:IC REG CTRLR BUCK PWM VM 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF)
ISL8103CRZ-T 功能描述:IC REG CTRLR BUCK PWM VM 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF)
ISL8103EVAL1 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Three-Phase Buck PWM Controller with High Current Integrated MOSFET Drivers
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

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

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

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*