Datasheet > ISL9491ERZ

ISL9491ERZ

更新时间： 2024-11-09 05:39:47

品牌	Logo	应用领域
英特矽尔 - INTERSIL		/
页数	文件大小	规格书
13页	329K
描述
LNB Power Supply and Control for Satellite Set-Top Box

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ISL9491ERZ 数据手册

Single Output LNB Supply Voltage Regulator for

Satellite Set-Top Box Applications

ISL9491, ISL9491A

Features

• Single Chip Power Solution

- Operation for 1-Tuner/1-Dish Applications

These devices are designed for supplying power and

control signals from advanced satellite set-top box (STB)

modules to the low noise blocks (LNBs) of single antenna

ports. Each device consists of a current-mode boost

converter and a low-noise linear regulator along with the

circuitry required for tone injection and pin controllable

interface. The device makes the total LNB supply design

simple, efficient and compact with low external

component count.

• Switch-Mode Power Converter for Lowest Dissipation

- Boost PWMs with >92% Efficiency

- Pin Controllable Enable and Output

• 2.5V/3.3V/5V Logic Compatible

• FAULT Signal

• DIRECTV SWM Compliant

The current-mode boost converters provide the linear

regulator with input voltage that is set to the voltage at

the VOUT pin plus a minimal drop to insure minimum

power dissipation across the internal LDO. This maintains

constant voltage drop across the linear pass element

while permitting adequate voltage range for tone

injection.

• VSET Pin to Toggle between Vertical and Horizontal

Polarizations

• External Tone Input

• Internal Overcurrent and Over-Temperature

Protection

• Pb-Free (ROHs Compliant)

The final regulated output voltage is available at the

cathode of the back diode to support the operation of an

antenna port for a single tuner. The outputs can be set to

various voltage level for the desired polarization

reception by means of the logic presented to the VSET0

and VSET1 pins. An EN pin is to be driven high to enable

the outputs for the PWM and linear combination; setting

EN low disables the output, forcing a shutdown mode.

Applications

• LNB Power Supply and Control for Satellite Set-Top

Box

Pin Configuration

ISL9491, ISL9491A

(16 LD QFN)

TOP VIEW

The external modulation input (EXTM) can accept a tone

modulated DiSEqC command and transfer it

symmetrically to the output to meet DiSEqC 1.x protocol.

An external DiSEqC tank circuit can also be implemented

to support DiSEqC 2.x.

16 15 14 13

Ordering Information

VCC

12 ILIMIT

11 TCAP

PART

NUMBER

(Note)

TEMP.

RANGE

(°C)

PART

MARKING

PACKAGE

(Pb-free) DWG. #

PKG.

PGND

GATE

10 VSET1

94 91ERZ

ISL9491ERZ*

ISL9491AERZ*

-20 to +85 16 Ld QFN

L16.4x4

VSET0

94 91AERZ

*Add “-T” suffix for tape and reel. Please refer to TB347 for

details on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets, molding compounds/die attach

materials, and 100% matte tin plate plus anneal (e3

termination finish, which is RoHS compliant and compatible with

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.

October 13, 2009

FN6531.0

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.

All other trademarks mentioned are the property of their respective owners.

12 3 4 5 6 7...13

中文翻译

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与ISL9491ERZ相关器件

型号	品牌	获取价格	描述	数据表
ISL9492	INTERSIL	获取价格	Single Output LNB Supply and Control Voltage Regulator
ISL9492_1103	INTERSIL	获取价格	Single Output LNB Supply and Control Voltage Regulator
ISL9492ERZ	RENESAS	获取价格	Highly Integrated Single Output LNB Regulator with I<sup>2</sup>C Interface fo
ISL9492ERZ	INTERSIL	获取价格	Single Output LNB Supply and Control Voltage Regulator
ISL9492ERZ-T	RENESAS	获取价格	Highly Integrated Single Output LNB Regulator with I<sup>2</sup>C Interface fo
ISL9492ERZ-T13	RENESAS	获取价格	Switching Regulator
ISL9492ERZ-T7	RENESAS	获取价格	Switching Regulator
ISL9492QFNEVAL1	INTERSIL	获取价格	Single Output LNB Supply and Control Voltage Regulator
ISL9500	INTERSIL	获取价格	Precision Multi-Phase Buck PWM Controller
ISL9500CVZ	INTERSIL	获取价格	Precision Multi-Phase Buck PWM Controller

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