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參數(shù)資料
| 型號： | LNBP9LIT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, SFM5 |
| 封裝： | ROHS COMPLIANT, IPPAK-5 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大?。?/td> | 439K |
| 代理商： | LNBP9LIT |
August 2010
Doc ID 15153 Rev 2
1/21
21
LNBP8L, LNBP9L
LNBP10L, LNBP11L
LNB supply and control voltage regulator
Features
■ Simplest integrated solution for LNB remote
supply and control
■ 500 mA guaranteed output current
■ Dual input supply for reducing power
dissipation (DFN package)
■ 3-state function to enable/disable and select
the output voltage level through a single pin
■ Fast oscillator startup for DiSEq encoding
(LNBP9L/11L versions)
■ External 22 kHz modulation input pin
(LNBP8L/10L versions)
■ Cable length compensation, LLC pin
(LNBP10L, LNBP11L versions)
■ Short-circuit and over-temperature protection
■ LNB overload and short-circuit dynamic
protection (LNBP10L, LNBP11L versions)
■ Available in DFN8 (5 x 6 mm) and IPPAK
packages
Description
Intended for analog and digital satellite receivers,
the LNBP is a monolithic linear voltage regulator,
assembled in the DFN8 (5 x 6) and IPPAK
packages, specifically designed to provide the
powering voltages and the interfacing signals to
the LNB down-converter. The regulator output
can be logic controlled for 13 V or 18 V (typ.) by
means of the EN/VSEL 3-state pin for remotely
controlling the LNB. When the IC is powered and
put in standby (EN/VSEL pin at high impedance),
the regulator output is disabled. In order to reduce
power dissipation, the LNBP10L/11L versions (on
DFN package) feature 2 supply inputs: VCC1 and
VCC2. These pins must be powered, respectively,
at 15 V (min.) and 22 V (min.), and an internal
switch will automatically select the appropriate
supply voltage according to the selected output
voltage. The LNBP8L/9L versions (in the IPPAK
package) have only one supply input pin, which
must be supplied at 22 V (min.). Additionally, the
LNBP10L/11L versions have the LLC pin to
increment the selected output voltage value by 1
V (typ.) to compensate for the excess voltage
drop along the coaxial cable (LLC pin HIGH). An
analog 22 kHz modulation input pin (EXTM) is
available in the LNBP8L and LNBP10L versions.
An appropriate DC blocking capacitor must be
used to couple the modulating signal source to
the EXTM pin. The LNBP10L/11L versions are
also equipped with over-current dynamic
protection: as soon as an overload is detected the
output is shut down for the time TOFF, which is
determined by the capacitor connected between
the CEXT pin and GND. After the time has
elapsed, the output is resumed for a time TON =
(1/12)*TOFF (typ.). If the overload is still present,
the protection circuit will cycle again through TOFF
and TON until the overload is removed. A typical
TON+TOFF value is 1100 ms when a 4.7 F
external capacitor is used on the CEXT. This
dynamic operation can greatly reduce the power
dissipation in short-circuit condition, while
ensuring excellent power-on startup even with
highly capacitive loads on the LNB outputs. The
device is packaged in the IPPAK for through-hole
mounting and in the DFN8 (5 x 6) for surface
mounting. Both package solutions are offered in
two versions: with ten pins (LNBP9L/11L) to use
with the integrated 22 kHz tone generator, or with
the EXTM pin (LNBP8L/10L) to use external 22
kHz sources. All versions have built-in thermal
protection to prevent overheating damage.
DFN8 (5 x 6 mm)
IPPAK
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LNBP9V7V | 制造商:STMicroelectronics 功能描述:REG STD LIN SELECTABLE POS 13V/18V 0.5A 7PIN HEPTAWATT V - Rail/Tube |
| LNBS21 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| LNBS21_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| LNBS21PD | 功能描述:其他電源管理 LNBP Supply/Control RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| LNBS21PD-TR | 功能描述:其他電源管理 LNB Supply/Cont IC RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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