- 您現在的位置：買賣IC網 > PDF目錄384524 > ISL6269A (Intersil Corporation) High-Performance Notebook PWM Controller(高性能筆記本PWM控制器) PDF資料下載
參數資料
| 型號： | ISL6269A |
| 廠商： | Intersil Corporation |
| 英文描述： | High-Performance Notebook PWM Controller(高性能筆記本PWM控制器) |
| 中文描述： | 高性能筆記本PWM控制器（高性能筆記本的PWM控制器） |
| 文件頁數： | 10/14頁 |
| 文件大小： | 313K |
| 代理商： | ISL6269A |
10
FN9253.2
May 30, 2007
Programming the Output Voltage
When the converter is in regulation there will be 600mV from
the FB pin to the GND pin. Connect a two-resistor voltage
divider across the VO pin and the GND pin with the output
node connected to the FB pin. Scale the voltage-divider
network such that the FB pin is 600mV with respect to the
GND pin when the converter is regulating at the desired
output voltage. The output voltage can be programmed from
600mV to 3.3V.
Programming the output voltage is written as:
Where:
- V
OUT
is the desired output voltage of the converter
- V
REF
is the voltage that the converter regulates to
between the FB pin and the GND pin
- R
TOP
is the voltage-programming resistor that connects
from the FB pin to the VO pin. In addition to setting the
output voltage, this resistor is part of the loop
compensation network
- R
BOTTOM
is the voltage-programming resistor that
connects from the FB pin to the GND pin
Beginning with R
TOP
between 1k
Ω
to 5k
Ω,
calculating
R
BOTTOM
is written as:
V
R
OUT
Programming the PWM Switching Frequency
The ISL6269A does not use a clock signal to produce PWM.
The PWM switching frequency f
SW
is programmed by the
resistor R
FSET
that is connected from the FSET pin to the
GND pin. The
approximate
PWM switching frequency is
written as:
FSET
Estimating the value of R
FSET
is written as:
R
FSET
SW
Where:
- f
SW
is the PWM switching frequency
- R
FSET
is the f
SW
programming resistor
- K = 75 x 10
-12
It is recommended that whenever the control loop
compensation network is modified, f
SW
should be checked
for the correct frequency and if necessary, adjust R
FSET
.
Compensation Design
The LC output filter has a double pole at its resonant frequency
that causes the phase to abruptly roll downward. The R
3
modulator used in the ISL6269A makes the LC output filter
resemble a first order system in which the closed loop stability
can be achieved with a Type II compensation network.
Your local Intersil representative can provide a PC-based
tool that can be used to calculate compensation network
component values and help simulate the loop frequency
response. The compensation network consists of the internal
error amplifier of the ISL6269A and the external components
R1, R2, C1, and C2 as well as the frequency setting
components R
FSET
, and C
FSET,
are identified in the
schematic Figure 6.
General Application Design Guide
This design guide is intended to provide a high-level
explanation of the steps necessary to create a single-phase
power converter. It is assumed that the reader is familiar with
many of the basic skills and techniques referenced below. In
V
REF
V
OUT
R
R
TOP
R
BOTTOM
+
---------------------------------------------------
=
(EQ. 5)
R
BOTTOM
REF
----------------–
=
(EQ. 6)
f
SW
---------------------------
=
(EQ. 7)
-----------------
=
(EQ. 8)
GND
PHASE
UG
LG
C
OUT
L
OUT
ISL6269A
Q
HIGH_SIDE
R
FSET
C
FSET
Q
LOW_SIDE
EA
+
VIN
VIN
VO
FB
R2
R1
C1
C2
-
FSET
COMP
REF
C
ESR
GATE DRIVERS
DCR
R
3
MODULATOR
VOUT
FIGURE 6. COMPENSATION REFERENCE CIRCUIT
ISL6269A
相關PDF資料 |
PDF描述 |
|---|---|
| ISL6271ACRZ | Integrated XScale Regulator |
| ISL6271ACRZ-T | Integrated XScale Regulator |
| ISL6271A | Integrated XScale Regulator |
| ISL6271ACR | Integrated XScale Regulator |
| ISL6271ACR-T | Integrated XScale Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL6269ACRZ | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:Robust Ripple Regulator™ (R³) 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) |
| ISL6269ACRZ-T | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:Robust Ripple Regulator™ (R³) 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) |
| ISL6269ACRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL6269ACRZ-T WITH GOLD BOND WIRE ONLY, T&R - Tape and Reel |
| ISL6269AEVAL2 | 制造商:Intersil Corporation 功能描述:ISL6269A EVALUATION BOARD 2 - Bulk |
| ISL6269AEVAL2Z | 功能描述:EVALUATION BOARD FOR ISL6269A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:Robust Ripple Regulator™ (R³) 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
發(fā)布緊急采購，3分鐘左右您將得到回復。