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參數(shù)資料
| 型號(hào)： | ISL6560EVAL1 |
| 廠商： | Intersil Corporation |
| 英文描述： | Microprocessor CORE Voltage Regulator Two-Phase Buck PWM Controller |
| 中文描述： | 微處理器核心電壓調(diào)節(jié)兩相降壓PWM控制器 |
| 文件頁數(shù)： | 6/14頁 |
| 文件大小： | 396K |
| 代理商： | ISL6560EVAL1 |
6
FN9011.3
General Circuit Description
The ISL6560 is a two-power channel, current mode PWM
controller with input current sensing. A transconductance
error amplifier helps establish the desired droop voltage for
microprocessor power supplies and will be explained later.
Figure 1 is a functional system block diagram of the IC in a
power supply application. A single current sampling resistor,
R
SENSE
, on the input side of the supply monitors the current
for both channels via a comparator within the ISL6560. A
single comparator insures that both channels are monitored
by the same circuitry, helping to balance the operating
current of each channel. During normal operation the
comparator is tripped by the peak inductor current,
terminating the conduction cycle. As more current is needed
to supply the output load, the comparator threshold voltage
is increased, increasing the inductor current to
accommodate the increased load demands.
Circuit Operation
Figure 1 will be used to describes operation of the controller.
A transconductance error amplifier provides the major
voltage control function. The error amplifier’s positive input is
connected to an internal DAC that is programmed via a 5-bit
code from the microprocessor. Regulation is accomplished
by the amplifier attempting to make both inputs equal. This
does not happen because of the limited loop gain and
provides the bases for droop compensation mentioned
earlier and described below.
Figure 2 shows a curve of the current comparator threshold
voltage as a function of the error amplifier output voltage,
V
COMP
. From this curve, it can be seen that as V
COMP
PWM1
PWM2
+
GATE DRIVER
and
OUTPUT FETs
GATE DRIVER
and
OUTPUT FETs
+
-
gm
Error
Amplifier
+
Comparator
-
Current
OUTPUT
GATE
DRIVERS
and
Logic
OSCILLATOR
V
CORE
SET
RESET
INPUT
VOLTAGE
R
L
Voltage
Reference
ISL6560
D/A
VID4
VID3
VID2
VID1
VID0
CS+
CS-
CT
COMP
REF
FB
GND
R
SENSE
FIGURE 1. FUNCTIONAL SYSTEM BLOCK DIAGRAM SHOWING MAJOR COMPONENTS
0
20
40
60
80
100
120
140
160
0.5
1.0
1.5
2.0
2.5
3.0
0
V
CS(CL)
(mV)
V
C
12.5V/V
{
Output
Disable
Threshold
FIGURE 2. CURRENT COMPARATOR THRESHOLD VOLTAGE
AS A FUNCTION OF VCOMP
ISL6560
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參數(shù)描述 |
|---|---|
| ISL6561CR | 功能描述:IC CTRLR PWM MULTIPHASE 40-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| ISL6561CR-T | 功能描述:IC CTRLR PWM MULTIPHASE 40-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| ISL6561CRZ | 功能描述:IC CTRLR PWM MULTIPHASE 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6561CRZ | 制造商:Intersil Corporation 功能描述:Pulse Width Modulation (PWM) Controller |
| ISL6561CRZA | 功能描述:IC CTRLR PWM MULTIPHASE 40-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
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