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| 型号： | ISL6421AEVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD 1 FOR ISL6421A |
| 标准包装： | 1 |
| 系列： | * |
?
ISL6421A
Data Sheet
March 9, 2006
FN9167.3
Single Output LNB Supply and Control
Voltage Regulator with I 2 C Interface for
Advanced Satellite Set-top Box Designs
The ISL6421A is a highly integrated solution for providing
power and control signals from advanced satellite set-top
box (STB) modules to the low noise block (LNB). The
internal architecture of this device contains a current-mode
boost PWM and a low-noise linear regulator, along with the
circuitry required for I 2 C device interfacing and for providing
DiSEqC? standard control signals to the LNB.
A regulated output voltage is available at the output terminal
(VOUT) to support the operation of the antenna port in
advanced satellite STB applications. The regulated output
may be set to either 13V or 18V by use of the voltage select
command bit (VSEL) through the I 2 C bus. Additionally, to
compensate for the voltage drop in the coaxial cable, the
voltage may be increased by 1V with the line length
compensation bit (LLC) feature. The device can be put into a
standby mode by means of the enable bit (EN), this disables
the PWM and Linear regulator combination and helps
conserve power.
The input to the linear regulator is derived from the current
mode boost converter, such that the required voltage is the
sum of the output voltage and the linear regulator drop (1.0V
typical). This ensures that the power dissipation is minimized
and maintains a constant voltage drop across the linear pass
element, while permitting an adequate voltage range for tone
injection.
The device is capable of providing 450mA (typical). The
overcurrent limit is either digitally or resistor programmable.
Features
? Switch-Mode Power Converter for Lowest Dissipation
- Boost PWM with >92% Efficiency
- Selectable 13V or 18V Outputs
- Digital Cable Length Compensation (1V)
- Vsw tracks Vout ensures low dissipation
? I 2 C Compatible Interface for Remote Device Control
- Registered Slave Address 0001 00XX
- Fully Functional 3.3V, 5V Operation up to 400kHz
? Built-In Tone Oscillator Factory Trimmed to 22kHz
- Facilitates DiSEqC? (EUTELSAT) Encoding
- External Modulation input DSQIN
? Internal Over Temperature Protection and Diagnostics
? Internal Overload and Over Temperature Flags
(Visible on I 2 C)
? Output Back-Bias Protection to 24V
? LNB Short-Circuit Protection and Diagnostics
? QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Product Outline
- Near Chip-Scale Package Footprint
? External Pins to Select 13V/18V Options
? Pb-Free Available (RoHS Compliant)
Applications
? LNB Power Supply and Control for Satellite Set-Top Box
Pinout
ISL6421A (QFN) TOP VIEW
References
? Tech Brief 389 (TB389) - “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”; Available
PGND
1
32
31
30
29
28
27
26
25
24 CPSWOUT
on the Intersil website, www.intersil.com
Ordering Information
NC
2
23 NC
PART
PART
TEMP.
RANGE
PKG.
SGND
3
22 NC
NUMBER*
MARKING
(°C)
PACKAGE
DWG. #
SEL18V
4
21 NC
ISL6421AER
ISL6421AER
-20 to 85 32 Ld 5x5 QFN L32.5x5
NC
BYPASS
PGND
GATE
5
6
7
8
20 AGND
19 VOUT
18 DSQIN
17 TCAP
ISL6421AERZ ISL6421AERZ -20 to 85 32 Ld 5x5 QFN L32.5x5
(Note) (Pb-free)
*Add -T for tape and reel package.
NOTE: Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with
9
10
11
12
13
14
15
16
both SnPb and Pb-free soldering operations. Intersil Pb-free products
are MSL classified at Pb-free peak reflow temperatures that meet or
exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6421ER | 功能描述:IC REG SGL LNB CONTROL 32-QFN RoHS:否 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) |
| ISL6421ER-T | 功能描述:IC REG SGL LNB CONTROL 32-QFN RoHS:否 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) |
| ISL6421ERZ | 功能描述:电流型 PWM 控制器 SINGLE LNBP SUPPLY CONTROL VG 32LD MLFP RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ISL6421ERZ-T | 功能描述:电流型 PWM 控制器 SINGLE LNBP SUPPLY CONTROL VG 32LD MLFP RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ISL6421EVAL1 | 功能描述:EVALUATION BOARD 1 ISL6421 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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