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參數(shù)資料
| 型號(hào)： | ISL656062EVAL1 |
| 廠(chǎng)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(yè)數(shù)： | 6/14頁(yè) |
| 文件大?。?/td> | 396K |
| 代理商： | ISL656062EVAL1 |
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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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL6560CBZ-T | Microprocessor CORE Voltage Regulator Two-Phase Buck PWM Controller |
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| ISL6561CR-T | Multi-Phase PWM Controller with Precision Rds(on) or DCR Differential Current Sensing for VR10.X Application |
| ISL6561CR | Multi-Phase PWM Controller with Precision Rds(on) or DCR Differential Current Sensing for VR10.X Application |
| ISL6561CRZ | Multi-Phase PWM Controller with Precision Rds(on) or DCR Differential Current Sensing for VR10.X Application |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6560C WAF | 制造商:Intersil Corporation 功能描述: |
| ISL6560CB | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類(lèi)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:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR) |
| ISL6560CB-T | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類(lèi)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:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR) |
| ISL6560CBZ | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無(wú) 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6560CBZ-T | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無(wú) 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
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