參數(shù)資料
型號(hào)： ISL6561CR
廠商： INTERSIL CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： Multi-Phase PWM Controller with Precision Rds(on) or DCR Differential Current Sensing for VR10.X Application
中文描述： SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PQCC40
封裝： 6 X 6 MM, PLASTIC, MO-220VJJD-2, MLFP, QFN-40
文件頁(yè)數(shù)： 14/26頁(yè)
文件大?。?/td> 782K
代理商： ISL6561CR
14
FN9098.5
May 12, 2005
Channel current balance is essential in realizing the thermal
advantage of multi-phase operation. The heat generated in
down converting is dissipated over multiple devices and a
greater area. The designer avoids the complexity of driving
multiple parallel MOSFETs, and the expense of using heat
sinks and nonstandard magnetic materials.
Voltage Regulation
The integrating compensation network shown in Figure 7
assures that the steady-state error in the output voltage is
limited only to the error in the reference voltage (output of
the DAC) and offset errors in the OFS current source,
remote-sense and error amplifiers. Intersil specifies the
guaranteed tolerance of the ISL6561 to include the
combined tolerances of each of these elements.
The output of the error amplifier, V
COMP
, is compared to the
sawtooth waveform to generate the PWM signals. The PWM
signals control the timing of the Intersil MOSFET drivers and
regulate the converter output to the specified reference
voltage. The internal and external circuitry that controls
voltage regulation is illustrated in Figure 7.
The ISL6561 incorporates an internal differential remote-
sense amplifier in the feedback path. The amplifier removes
the voltage error encountered when measuring the output
voltage relative to the local controller ground reference point
resulting in a more accurate means of sensing output
voltage. Connect the microprocessor sense pins to the non-
inverting input, VSEN, and inverting input, RGND, of the
remote-sense amplifier. The remote-sense output, V
DIFF
, is
connected to the inverting input of the error amplifier through
an external resistor.
A digital to analog converter (DAC) generates a reference
voltage based on the state of logic signals at pins VID4
through VID12.5. The DAC decodes the a 6-bit logic signal
(VID) into one of the discrete voltages shown in Table 1.
Each VID input offers a 50
μ
A pull-up to an internal 2.5V
source for use with open-drain outputs. The pull-up current
diminishes to zero above the logic threshold to protect
voltage-sensitive output devices. External pull-up resistors
can augment the pull-up current sources in case leakage
into the driving device is greater than 50
μ
A.
Load-Line Regulation
Some microprocessor manufacturers require a precisely-
controlled output resistance. This dependence of output
voltage on load current is often termed “droop” or “l(fā)oad line”
regulation. By adding a well controlled output impedance,
the output voltage can effectively be level shifted in a
direction which works to achieve the load-line regulation
required by these manufacturers.
FIGURE 6. CHANNEL-1 PWM FUNCTION AND CURRENT-
BALANCE ADJUSTMENT
÷
N
I
AVG
I
4
*
I
3
*
I
2
Σ
-
+
+
-
+
-
f(j
ω
)
PWM1
I
1
V
COMP
SAWTOOTH SIGNAL
I
ER
NOTE: *Channels 3 and 4 are optional.
FILTER
FIGURE 7. OUTPUT VOLTAGE AND LOAD-LINE
REGULATION WITH OFFSET ADUJUSTMENT
I
AVG
EXTERNAL CIRCUIT
R
C
C
C
ISL6561 INTERNAL CIRCUIT
COMP
R
FB
FB
VDIFF
VSEN
RGND
-
+
V
DROOP
ERROR AMPLIFIER
-
+
V
OUT
+
DIFFERENTIAL
REMOTE-SENSE
AMPLIFIER
V
COMP
REF
DAC
R
REF
C
REF
-
+
V
OUT
-
IDROOP
TABLE 1. VOLTAGE IDENTIFICATION (VID) CODES
VID4
VID3
VID2
VID1
VID0
VID12.5
VDAC
0
1
0
1
0
0
0.8375V
0
1
0
0
1
1
0.8500V
0
1
0
0
1
0
0.8625V
0
1
0
0
0
1
0.8750V
0
1
0
0
0
0
0.8875V
0
0
1
1
1
1
0.9000V
0
0
1
1
1
0
0.9125V
0
0
1
1
0
1
0.9250V
0
0
1
1
0
0
0.9375V
0
0
1
0
1
1
0.9500V
0
0
1
0
1
0
0.9625V
0
0
1
0
0
1
0.975V0
0
0
1
0
0
0
0.9875V
0
0
0
1
1
1
1.0000V
0
0
0
1
1
0
1.0125V
0
0
0
1
0
1
1.0250v
0
0
0
1
0
0
1.0375V
0
0
0
0
1
1
1.0500V
ISL6561
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參數(shù)描述
ISL6561CR-T 功能描述:IC CTRLR PWM MULTIPHASE 40-QFN RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專(zhuān)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(lèi)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(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專(zhuān)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(lèi)型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤(pán) 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(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專(zhuān)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(lèi)型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
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