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| 型号： | LX1662CDT |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | PLASTIC, SOIC-14 |
| 文件页数： | 3/15页 |
| 文件大小： | 308K |
| 代理商： | LX1662CDT |
SINGLE-CHIP PROGRAMMABLE PWM CONTROLLERS WITH 5-BIT DAC
LX1662/62A, LX1663/63A
PRODUCT DA T ABOOK 1996/1997
11
Copyright 1999
Rev. 1.1 11/99
P RODUCTION D ATA S HEET
BILL OF MATERIALS
C
2
1500F, 6.3V capacitor
MV-GX Sanyo
2
C
1
1500F, 6.3V capacitor
MV-GX Sanyo
4
C
8
680pF
SMD Cap
1
C
3
0.1F
SMD Cap
1
C
5
1F, 16V
SMD Ceramic
1
L
1
5F Inductor
HM0096832 BI
1
L
2
1F Inductor
1
Q
1
MOSFET
IRL3102 International Rectifier or equivalent
1
Q
2
MOSFET
IRL3303 International Rectifier or equivalent
1
R
1
2.5m Sense Resistor (PCB trace)
1
U1
Controller IC
LX1662CD Linfinity
1
Total
15
Ref
Description
Part Number / Manufacturer
Qty.
LX1662 Bill of Materials (Refer to Product Highlight)
USING THE LX1662/63
DEVICES
The LX1662/63 devices are very easy to design with, requiring
only a few simple calculations to implement a given design. The
following procedures and considerations should provide effec-
tive operation for virtually all applications. Refer to the Appli-
cation Information section for component reference designa-
tors.
TIMING CAPACITOR SELECTION
The frequency of operation of the LX166x is a function of duty
cycle and OFF-time. The OFF-time is proportional to the timing
capacitor (which is shown as C
8 in all application schematics in
this data sheet), and is modulated to minimize frequency
variations with duty cycle. The frequency is constant, during
steady-state operation, due to the modulation of the OFF-time.
The timing capacitor (C
T)
should be selected using the
following equation:
C
T =
Where I
DIS is fixed at 200A and fS is the switching frequency
(recommended to be around 200kHz for optimal operation and
component selection).
When using a 5V input voltage, the switching frequency (f
S)
can be approximated as follows:
C
T = 0.621 *
Choosing a 680pF capacitor will result in an operating
frequency of 183kHz at V
OUT = 2.8V.
When a 12V power input
is used, he capacitor value must be changed (the optimal timing
capacitor for 12V input will be in the range of 1000-1500pF).
L
1 OUTPUT INDUCTOR SELECTION
The inductance value chosen determines the ripple current
present at the output of the power supply. Size the inductance
to allow a nominal ±10% swing above and below the nominal DC
load current, using the equation L = V
L * T/I, where T is the
OFF-time, V
L is the voltage across the inductor during the OFF-
time, and
I is peak-to-peak ripple current in the inductor. Be
sure to select a high-frequency core material which can handle
the DC current, such as 3C8, which is sized for the correct power
level. Typical inductance values can range from 2 to 10H.
Note that ripple current will increase with a smaller inductor.
Exceeding the ripple current rating of the capacitors could cause
reliability problems.
(1 - V
OUT /VIN ) * IDIS
f
S (1.52 - 0.29* VOUT)
I
DIS
f
S
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| LX1663CDT | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO16 |
| LX1663ACDT | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO16 |
| LX1662ACD | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO14 |
| LX1662CD | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO14 |
| LX1662CN | 1.5 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDIP14 |
相关代理商/技术参数 |
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|---|---|
| LX1662CN | 功能描述:IC PWM PROG SGL 5BIT DAC 14 DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| LX1663 | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:SINGLE-CHIP PROGRAMMABLE PWM CONTROLLERS WITH 5-BIT DAC |
| LX1663A | 制造商:MICROSEMI 制造商全称:Microsemi Corporation 功能描述:SINGLE-CHIP PROGRAMMABLE PWM CONTROLLERS WITH 5-BIT DAC |
| LX1663ACD | 功能描述:IC PWM PROG SGL 5BIT DAC 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| LX1663ACN | 功能描述:IC PWM PROG SGL 5BIT DAC 16DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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