NOTICE - The following device(s) are recommended alternatives:

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. 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. 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. 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.

特長

  • Single Chip Power Solution
  • Operation for 1-Tuner/1-Dish Applications
  • 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
  • VSET Pin to Toggle between Vertical and Horizontal Polarizations
  • External Tone Input
  • Internal Overcurrent and Over-Temperature Protection
  • Pb-Free (ROHs Compliant)

アプリケーション

  • LNB Power Supply and Control for Satellite Set-Top

製品選択

製品名 Part Status Pkg. Type Carrier Type MOQ 購入/サンプル
Active QFN Tube 75
Availability
Active QFN Reel 6000
Availability

ドキュメント

タイトル language 分類 形式 サイズ 日付
データシート
ISL9491, ISL9491A Datasheet データシート PDF 716 KB
アプリケーションノート、ホワイトペーパー
AN1681: Grounding Techniques アプリケーションノート PDF 509 KB
AN1684: Nonideality of Ground アプリケーションノート PDF 397 KB
Five Easy Steps to Create a Multi-Load Power Solution ホワイトペーパー PDF 846 KB
PCN / PDN
PCN20029A - Alternate bond wire material and assembly facility of the listed Renesas QFN packaged products 製品変更通知 PDF 327 KB
PCN13024 - Alternate Manufacturing Site for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering - Chung-Li, Taiwan (ASECL 製品変更通知 PDF 183 KB
PCN13009 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li (ASECL), Taiwan and STATS ChipPAC (SCM) - Kuala Lump 製品変更通知 PDF 173 KB
PCN11117 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia 製品変更通知 PDF 169 KB