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STMicroelectronics LNBP20PD-TR
- Part No.:
- LNBP20PD-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Special Purpose Regulators
- Package:
- 20-SOIC (0.433", 11.00mm Width) Exposed Pad
- Datasheet:
-
LNBP20PD-TR.pdf
- Description:
- IC REG CONV SAT 1OUT POWERSO-20
- Quantity:
- Payment:
- Shipping:
Inventory:3,736
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Product details
Overview
LNBP20PD-TR from STMicroelectronics is a monolithic linear voltage regulator in PowerSO-20 package, designed to supply and control two LNB downconverters via coaxial cable in satellite receivers. It delivers logic-selectable 13 V or 18 V (typ.) outputs per port, integrates a factory-trimmed 22 kHz tone oscillator (±2 kHz tolerance), supports cable length compensation (+1 V), and provides dynamic short-circuit protection with 4.7 µF CEXT timing (1200 ms cycle).
For engineers reviewing the LNBP20PD-TR datasheet, LNBP20PD-TR pinout, LNBP20PD-TR application, or LNBP20PD-TR equivalent, key selection criteria include dual-LNB port control, 22 kHz DiSEqC™-compatible tone generation, dual-supply input switching (VCC1/VCC2), backward current limiting (<3 mA in stand-by), and integrated overload flag (OLF) diagnostics.
Technical Context
The LNBP20PD-TR implements parallel-interface LNB power management with independent logic-controlled port enable (EN), selection (OSEL), voltage set (VSEL), and line-length compensation (LLC). Its internal architecture includes an automatic supply-input selector that routes VCC1 (15–25 V) for 13/14 V outputs or VCC2 (22–25 V) for 18/19 V outputs to minimize dissipation.
It features a dedicated 22 kHz square-wave oscillator (20–24 kHz, 0.55–0.9 VPP, 40–60% duty) enabled by ENT, plus analog external modulation input (EXTM) with 5 V/V gain (10 Hz–40 kHz) and bypass switch (MI→LNBA, <0.6 V drop at 300 mA) for slave-mode operation in dual-receiver systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 13 V or 18 V (typ.), selectable per port via VSEL; +1 V boost via LLC for coax voltage drop compensation |
| Tone Frequency | 22 kHz (typ.), factory trimmed ±2 kHz - enables DiSEqC™ burst coding without external components |
| Dynamic Protection | Overload shutdown with 4.7 µF CEXT yields 1200 ms off-time (toff) and 80 ms on-time (ton = toff/15) |
| Supply Inputs | VCC1: 15–25 V (used for ≤14 V outputs); VCC2: 22–25 V (used for ≥18 V outputs); auto-switched internally |
| Backward Current Limit | <3 mA max when EN = LOW - prevents interference when sharing coax lines with other receivers |
| Thermal Protection | Junction shutdown at 150 °C; PowerSO-20 package offers 2 °C/W junction-to-case thermal resistance |
| Output Current Limit | 500–800 mA per port - supports standard LNB loads with margin for capacitive start-up |
Pinout & Package
LNBP20PD-TR is housed in a surface-mount PowerSO-20 package (15.8 × 14.5 × 3.6 mm, ECOPACK® lead-free), featuring exposed die pad for thermal dissipation and optimized for high-current LNB supply applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Primary supply input | 15–25 V source used for 13/14 V outputs; lower-voltage rail reduces power loss |
| VCC2 | Secondary supply input | 22–25 V source used for 18/19 V outputs; higher rail avoids dropout under load |
| LNBA / LNBB | Dual LNB output ports | Logic-selectable active port delivers regulated voltage; second port disabled per truth table |
| VSEL | Voltage selection control | Logic input sets 13 V (LOW) or 18 V (HIGH); combined with LLC for +1 V boost |
| ENT | Tone enable input | Activates internal 22 kHz oscillator; fast edge response enables DiSEqC™ encoding |
| OLF | Open-collector diagnostic flag | Goes LOW during overcurrent or overtemperature; high-impedance otherwise for MCU polling |
| CEXT | Protection timing capacitor | Connects to GND; sets overload cycle duration (e.g., 4.7 µF → 1200 ms toff) |
| MI | Master input for bypass mode | In stand-by (EN = LOW), routes MI voltage to LNBA - enables slave operation in shared-dish systems |
Key Features
| Feature | Design Value |
|---|---|
| Dual-port LNB control | Independent logic-selectable LNBA/LNBB activation with OSEL/EN, enabling two-antenna or master/slave configurations |
| Factory-trimmed 22 kHz oscillator | ±2 kHz accuracy eliminates need for calibration components; supports DiSEqC™ Level 1.x protocols directly |
| Dynamic overload protection | Self-resetting cycle (toff/ton) reduces average power dissipation during shorts while maintaining reliability |
| Coaxial cable compensation | LLC pin adds +1 V (typ.) to selected output voltage - corrects for IR drop across long coax runs |
| Bypass switch for slave mode | Internal MI→LNBA switch (EN = LOW) allows one receiver to control LNB while others remain passive on same cable |
Applications
| Satellite Dual-Port Receiver | DiSEqC™-Compliant LNB Control |
|---|---|
Use Scenario: Consumer-grade satellite receiver with two independent antenna inputs (e.g., for simultaneous viewing/recording of different orbital positions). IC Role / Device Role / Timing Role: LNBP20PD-TR powers and controls both LNBs via coax, selecting active port (LNBA/LNBB) and voltage (13/18 V) based on tuner commands. Use Value: Eliminates need for discrete regulators and tone generators; single IC handles all LNB interface functions with minimal external components. | Use Scenario: Implementation of DiSEqC™ 1.0/1.1 unidirectional command protocols for antenna positioning and band switching. IC Role / Device Role / Timing Role: Generates precise 22 kHz tone bursts (ENT-triggered, <15 µs rise/fall) synchronized with data pulses from MCU. Use Value: Factory-trimmed oscillator ensures tone frequency stays within EUTELSAT-specified ±2 kHz window - no tuning required for certification. |
| Shared-Dish Multi-Receiver System | Diagnostic-Enabled Satellite Front-End |
Use Scenario: Two satellite receivers connected to a single dish via splitter, requiring coordinated LNB control without signal contention. IC Role / Device Role / Timing Role: LNBP20PD-TR enters stand-by (EN = LOW), enabling MI→LNBA bypass to let master receiver power/control the LNB. Use Value: Backward current limited to <3 mA prevents cross-talk or damage when multiple receivers share coax infrastructure. | Use Scenario: Industrial or professional satellite receiver requiring real-time fault detection for field maintenance and remote diagnostics. IC Role / Device Role / Timing Role: Monitors LNB output current and junction temperature; asserts OLF pin LOW during overload or thermal events. Use Value: Enables MCU to log faults, trigger alerts, or initiate safe shutdown - improves system uptime and serviceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LNB supply and control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LNBP10SP-TR | PowerSO-10 package; lacks OSEL, MI, EXTM, LLC pins - supports only single-port, fixed-function operation | No port selection or slave bypass; no cable compensation or external modulation - suited for cost-sensitive single-LNB designs | Select when dual-port control, DiSEqC™ tone flexibility, or diagnostic capability are not required. |
| LNBP15SP-TR | PowerSO-10; includes OLF and CEXT but omits MI, EXTM, LLC - supports overload diagnostics but no slave mode or voltage boost | Limited to basic 13/18 V switching and protection; no tone modulation or coax compensation - fits entry-level dual-LNB receivers | Choose when OLF-based fault reporting is needed but full LNBP20PD-TR feature set exceeds requirements. |
Compared with LNBP10SP-TR and LNBP15SP-TR, LNBP20PD-TR uniquely combines dual-port logic control, factory-trimmed 22 kHz tone, cable-length compensation, and master/slave bypass - making it the only option supporting full DiSEqC™-capable dual-LNB systems in PowerSO-20.
Availability
LNBP20PD-TR is available at Aetrix Electronics and suitable for satellite receiver design, DiSEqC™-enabled antenna control systems, and multi-LNB front-end modules requiring stable component supply and long-term production continuity.
Supply support for LNBP20PD-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
LNBP20PD-TR belongs to ST's LNBP1X/LNBP20 series - a dedicated product line of LNB power and control ICs engineered specifically for analog/digital satellite receiver applications with coaxial interface requirements.
FAQ
What is the purpose of the MI (Master Input) pin?
The MI pin enables slave-mode operation in shared-dish systems. When EN is LOW, an internal electronic switch connects MI to LNBA, allowing a master receiver to power and control the LNB while the LNBP20PD-TR remains passive. This prevents signal contention on shared coax lines and limits backward current to ≤3 mA.
How does the dynamic overload protection work?
When overcurrent is detected on LNBA or LNBB, the output shuts down for a time (toff) determined by the capacitor on CEXT. After toff, it resumes for ton = toff/15 before rechecking. With 4.7 µF, this yields ~1200 ms off and ~80 ms on - reducing average power dissipation during sustained shorts while ensuring reliable restart after fault clearance.
Can LNBP20PD-TR generate DiSEqC™ Level 2.x commands?
No. The LNBP20PD-TR supports only unidirectional DiSEqC™ 1.x tone bursts via its internal 22 kHz oscillator. Level 2.x (bidirectional) requires additional external components - such as a separate transceiver IC and bus termination - as noted in the datasheet footnote (a) and Figure 25–31 schematics.
What is the function of the LLC pin?
The LLC (Line Length Compensation) pin adds +1 V (typ.) to the selected output voltage (13 V or 18 V) to offset IR drop across long coaxial cables. When LLC = HIGH, output becomes 14 V or 19 V respectively - improving LNB stability at distances exceeding 30 meters without external regulation.
LNBP20PD-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 20-SOIC (0.433", 11.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Converter, Analog and Digital Satellite STB Receivers/SatTV
- Voltage - Input:
- 15V ~ 25V
- Number of Outputs:
- 1
- Voltage - Output:
- 13V, 18V
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerSO-20
LNBP20PD-TR FAQ
1.How can I place an order for LNBP20PD-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LNBP20PD-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LNBP20PD-TR reliable?
The price and inventory of LNBP20PD-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LNBP20PD-TR is usually 5 days.
3.What payment methods are accepted for LNBP20PD-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LNBP20PD-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LNBP20PD-TR?
LNBP20PD-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LNBP20PD-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LNBP20PD-TR?
For technical support, including LNBP20PD-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LNBP20PD-TR requirements.
6.How does Aetrix verify that LNBP20PD-TR is sourced from the original manufacturer or authorized distributors?
All LNBP20PD-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LNBP20PD-TR meets industry standards.
7.What is the process for return or replacement of LNBP20PD-TR?
All LNBP20PD-TR units undergo pre-shipment inspection (PSI). If there is an issue with LNBP20PD-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LNBP20PD-TR part is unused and in its original packaging.
Return procedure for LNBP20PD-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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