- 您現在的位置：買賣IC網 > PDF目錄383159 > ISL6569ACBZ (INTERSIL CORP) Multi-Phase PWM Controller PDF資料下載
參數資料
| 型號： | ISL6569ACBZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Multi-Phase PWM Controller |
| 中文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | LEAD FREE, PLASTIC, MS-013-AE, SOIC-24 |
| 文件頁數： | 11/22頁 |
| 文件大?。?/td> | 514K |
| 代理商： | ISL6569ACBZ |
11
FN9092.2
December 29, 2004
Voltage Regulation
The output of the error amplifier, V
COMP
, is compared to the
sawtooth waveform to modulate the pulse width of the PWM
signals. The PWM signals control the timing of the Intersil
MOSFET drivers and regulate the converter output to the
specified reference voltage. Three distinct inputs to the error
amplifier determine the voltage level of V
COMP
. The internal
and external circuitry which control voltage regulation is
illustrated in Figure 6.
Most multi-phase controllers simply have the output voltage
fed back to the inverting input of the error amplifier through a
resistor. The ISL6569A features 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
amplifier output, V
DIFF
, is then tied through an external
resistor to the inverting input of the error amplifier.
A digital to analog converter (DAC) generates a reference
voltage based on the state of logic signals at pins VID4
through VID0. The DAC decodes the a 5-bit logic signal
(VID) into one of the discrete voltages shown in Table 1.
Each VID input offers a 20
μ
A pull-up to an internal 2.5V
source for use with open-drain outputs. External pull-up
resistors or active-high output stages can augment the pull-
up current sources, but a slight accuracy error can occur if
they are pulled above 2.9V. The DAC-selected reference
voltage is connected to the non-inverting input of the error
amplifier.
The ISL6569A features a second non-inverting input to the
error amplifier which allows the user to directly offset the
DAC reference voltage in the positive direction only. The
offset voltage is created by an internal current source which
feeds out the OFS pin into a user selected external resistor
to ground. The resulting voltage across the resistor, V
OFS
, is
internally divided down by ten to create the offset voltage.
This method of offsetting the DAC voltage is more accurate
than external methods of level-shifting the FB pin.The
integrating compensation network shown in Figure 6 assures
that the steady-state error in the output voltage is limited to
the error in the reference voltage (output of the DAC) plus
offset errors in the OFS current source, remote-sense and
error amplifiers. Intersil specifies the guaranteed tolerance of
the ISL6569A to include all variations in current sources,
amplifiers and the reference so that the output voltage
remains within the specified system tolerance of ±0.5
%
over
temperature.
FIGURE 6. OUTPUT-VOLTAGE AND LOAD-LINE REGULATION
-
+
+
I
AVG
REFERENCE
VOLTAGE
EXTERNAL CIRCUIT
ISL6569A INTERNAL CIRCUIT
COMP
C
C
R
C
R
FB
FB
IOUT
VDIFF
VSEN
RGND
-
+
V
DROOP
ERROR AMPLIFIER
-
+
V
OUT
SENSE
POINTS
GND
DIFFERENTIAL
REMOTE-SENSE
AMPLIFIER
V
COMP
OFS
x0.1
100
μ
A
R
OFS
OFFSET
VOLTAGE
-
+
V
OFS
REMOTE
TABLE 1. VOLTAGE IDENTIFICATION CODES
VID4
VID3
VID2
VID1
VID0
DAC
0
0
0
0
0
1.550
0
0
0
0
1
1.525
0
0
0
1
0
1.500
0
0
0
1
1
1.475
0
0
1
0
0
1.450
0
0
1
0
1
1.425
0
0
1
1
0
1.400
0
0
1
1
1
1.375
0
1
0
0
0
1.350
0
1
0
0
1
1.325
0
1
0
1
0
1.300
0
1
0
1
1
1.275
0
1
1
0
0
1.250
0
1
1
0
1
1.225
0
1
1
1
0
1.200
0
1
1
1
1
1.175
1
0
0
0
0
1.150
1
0
0
0
1
1.125
1
0
0
1
0
1.100
1
0
0
1
1
1.075
1
0
1
0
0
1.050
1
0
1
0
1
1.025
1
0
1
1
0
1.000
1
0
1
1
1
0.975
1
1
0
0
0
0.950
1
1
0
0
1
0.925
ISL6569A
相關PDF資料 |
PDF描述 |
|---|---|
| ISL6569ACB-T | Multi-Phase PWM Controller |
| ISL6569 | Multi-Phase PWM Controller |
| ISL6569CB-T | Multi-Phase PWM Controller |
| ISL6569CR-T | Multi-Phase PWM Controller |
| ISL6569CRZ | Multi-Phase PWM Controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL6569ACBZ-T | 功能描述:IC REG CTRLR BUCK PWM 24-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 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) |
| ISL6569ACR | 功能描述:IC REG CTRLR BUCK PWM 32-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數: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 產品目錄頁面:1316 (CN2011-ZH PDF) |
| ISL6569ACR-T | 功能描述:IC REG CTRLR BUCK PWM 32-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數: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 產品目錄頁面:1316 (CN2011-ZH PDF) |
| ISL6569ACRZ | 功能描述:IC REG CTRLR BUCK PWM 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:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 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) |
| ISL6569ACRZ-T | 功能描述:IC REG CTRLR BUCK PWM 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:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 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) |
發(fā)布緊急采購，3分鐘左右您將得到回復。