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STMicroelectronics LNBH24TPPR
- Part No.:
- LNBH24TPPR
- Manufacturer:
- STMicroelectronics
- Category:
- Special Purpose Regulators
- Package:
- 36-PowerBFSOP (0.295", 7.50mm Width)
- Datasheet:
-
LNBH24TPPR.pdf
- Description:
- IC REG CONV 2OUT POWERSSO-36
- Quantity:
- Payment:
- Shipping:
Inventory:1,321
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Product details
Overview
LNBH24TPPR from STMicroelectronics is a dual-channel LNB supply and control IC for satellite receiver systems, integrating two independent 13/18 V linear post-regulators with integrated step-up PWM controllers, I²C interface, and bi-directional DiSEqC™ 2.0 support. It delivers up to 500 mA per channel from a single 8–15 V input, features factory-trimmed 22 kHz tone generation (±0.5% accuracy), and provides real-time diagnostics including output voltage, current, temperature, and tone detection via I²C register bits.
For engineers reviewing the LNBH24TPPR datasheet, LNBH24TPPR pinout, LNBH24TPPR application, or LNBH24TPPR equivalent, this device serves as a complete analog/digital dual-LNB interface solution-enabling low-component-count STB designs with precise 22 kHz tone control, dynamic short-circuit protection, and DiSEqC™-compliant R-L filter bypass capability.
Technical Context
The LNBH24TPPR implements two fully independent channels (A/B), each with dedicated step-up DC-DC converter (93% typical efficiency @ 0.5 A), low-drop linear post-regulator (VUP–VOUT = 0.75 V typ.), and integrated N-MOSFET power switch. Each channel supports selectable 13/18 V output via VSEL/LLC bits and fast voltage switching via TTL-compatible VCTRL pin.
It embeds a patent-pending 22 kHz tone generator with ±0.5% frequency accuracy, synchronized DiSEqC™ encoding via DSQIN/TTX pins or I²C TEN bit, and bidirectional DiSEqC™ 2.0 support using DETIN input and DSQOUT output with AC-coupled R-L filter compliance. Diagnostic feedback includes IMON (min. load current), VMON (output voltage), TMON (tone presence/frequency), OLF (overload), and OTF (over-temperature) flags.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input Range | 8–15 V - Enables direct operation from standard STB power rails without external pre-regulation. |
| Output Voltage Options | 13.4 V / 18.5 V (LLC=0) or 14.4 V / 19.5 V (LLC=1) - Compensates coaxial cable voltage drop in long-run satellite installations. |
| Max Output Current per Channel | 500 mA - Sufficient for dual LNB powering; total combined current limited to <1 A to avoid thermal shutdown. |
| 22 kHz Tone Accuracy | ±0.5% (21.9–22.1 kHz) - Meets EUTELSAT DiSEqC™ 2.0 specification for reliable tone-based switching. |
| Efficiency (Step-Up Stage) | 93% @ 0.5 A - Minimizes heat dissipation in compact STB enclosures and reduces system-level cooling requirements. |
| I²C Diagnostic Bits | 5 real-time flags (IMON, VMON, TMON, OLF, OTF) - Enables firmware-driven fault isolation without external sensors. |
| Thermal Shutdown Threshold | 150 °C (typ.), recovery at 135 °C - Provides robust protection during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: PowerSSO-36 (Exposed pad) - Thermally enhanced surface-mount package with integrated ePad for efficient junction-to-PCB heat transfer in high-power satellite front-end applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VCC-L | Primary & analog supply inputs | Accepts 8–15 V common input; VCC-L powers analog blocks for noise isolation from digital switching transients. |
| LX-A / LX-B | Step-up converter N-MOS drain | Connects to external inductor; internal 100 V-rated N-MOS enables high-efficiency boost conversion. |
| VoRX-A / VoRX-B | Linear regulator DC output | Delivers regulated 13/18 V to LNBs through R-L filter; maintains stable bias under varying coaxial load conditions. |
| VoTX-A / VoTX-B | 22 kHz tone transmission output | Bypasses R-L filter during tone burst to prevent amplitude distortion; must be enabled via TTX before DiSEqC™ transmission. |
| DSQIN-A / DSQIN-B | DiSEqC™ command input | Accepts TTL-level DiSEqC™ data; triggers immediate 22 kHz modulation with 0.5-cycle latency for precise timing control. |
| DETIN-A / DETIN-B | 22 kHz tone detector input | AC-coupled input for bidirectional DiSEqC™ 2.0 bus monitoring; enables tone presence/frequency validation via TMON bit. |
| SDA / SCL | I²C interface | Standard two-wire bus for configuration (VSEL, EN, TEN, PCL) and diagnostic readback (VMON, IMON, etc.). |
| ISEL-A / ISEL-B | Current limit setting | External resistor sets max output current (IMAX = 10000/RSEL Ω); supports 10 kΩ → 1 A typical limit per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LNB channels | Enables simultaneous control of two satellite dishes or multi-switch outputs without cross-talk or shared resource contention. |
| Integrated 22 kHz tone generator + detector | Eliminates need for external oscillator and comparator; meets DiSEqC™ 2.0 timing and accuracy specs out-of-the-box. |
| Dynamic short-circuit protection (PCL mode) | Reduces average power dissipation by cycling output (900 ms OFF / 90 ms ON) during sustained overload-critical for unattended STB operation. |
| VCTRL pin for fast 13↔18 V switching | Hardware-level voltage toggle (13.4 V ↔ 18.5 V) with sub-microsecond response-avoids I²C transaction delay in time-critical LNB switching. |
| Real-time I²C diagnostics (5 flags) | Allows embedded firmware to autonomously detect open-cable (IMON), overtemp (OTF), tone failure (TMON), or LNB disconnect without external circuitry. |
Applications
| Dual-Tuner Satellite STB | Sat-PC TV Tuner Card |
|---|---|
|
Use Scenario: Consumer set-top box supporting simultaneous reception from two orbital positions (e.g., Astra 19.2°E and Hotbird 13°E). IC Role / Device Role / Timing Role: Dual LNB power manager and DiSEqC™ interface controller; handles 22 kHz tone generation, voltage selection, and bus arbitration between tuners. Use Value: Reduces BOM count by eliminating discrete DC-DC converters, tone oscillators, and protection ICs-cutting PCB area by >35% vs. discrete solutions. |
Use Scenario: PCIe or USB-based satellite TV tuner card for Windows/Linux PCs requiring low-profile, fanless operation. IC Role / Device Role / Timing Role: Compact dual-LNB interface with thermal-aware current limiting; manages power sequencing and DiSEqC™ handshaking during channel change. Use Value: Enables full DiSEqC™ 2.0 functionality in <15 mm height profile while maintaining <1.2 W total dissipation at full load. |
| Multi-Switch Distribution Hub | Professional Satellite Monitoring System |
|
Use Scenario: Indoor multi-switch box feeding up to 8 IRDs from four LNBs (e.g., Quattro LNB + Universal LNB combinations). IC Role / Device Role / Timing Role: Centralized LNB supply controller with AUX-mode forced 22 V test voltage for minimum-load detection across shared coaxial bus. Use Value: Resolves ambiguity in multi-IRD configurations by enabling deterministic open-cable detection-even when multiple receivers share same coax path. |
Use Scenario: Field-deployable satellite signal analyzer verifying LNB health, tone integrity, and voltage stability across remote sites. IC Role / Device Role / Timing Role: Diagnostic-enabled LNB interface with real-time I²C readout of VMON, TMON, and IMON-used for automated pass/fail reporting. Use Value: Replaces manual multimeter + tone probe setup with single-chip automated verification, reducing field service time by ~70%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LNB supply and control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2181AETM+ | Single-channel only; requires dual ICs for two LNBs; no integrated 22 kHz detector; relies on external tone injection. | Limited to simpler DiSEqC™ 1.x systems; lacks bi-directional DiSEqC™ 2.0 support and AUX-mode load testing. | Choose when cost-per-channel is prioritized over integration and diagnostics; not suitable for compact dual-tuner STBs. |
| SP2182TR | No I²C interface; fixed 13/18 V selection via pins; no real-time diagnostics; lower max current (350 mA/channel). | Targeted at basic analog satellite receivers; no firmware-controllable features or DiSEqC™ 2.0 compliance. | Select only for legacy designs where microcontroller integration is absent and DiSEqC™ 2.0 is unnecessary. |
Compared with MAX2181AETM+ and SP2182TR, the LNBH24TPPR uniquely integrates dual-channel regulation, DiSEqC™ 2.0 bidirectional support, and five-field I²C diagnostics in one PowerSSO-36 package-reducing system-level complexity while enabling advanced self-test and thermal management capabilities.
Availability
LNBH24TPPR is available at Aetrix Electronics and suitable for satellite TV set-top boxes, sat-PC tuner cards, and multi-switch distribution hubs requiring stable component supply, long-term lifecycle support, and DiSEqC™-compliant LNB interfacing.
Supply support for LNBH24TPPR 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 specializing in automotive, industrial, and consumer ICs, with broad expertise in power management and interface solutions.
The LNBH24TPPR belongs to ST's satellite front-end product line, designed specifically to simplify dual-LNB power and control in space-constrained, thermally sensitive STB and tuner applications while meeting EUTELSAT DiSEqC™ standards.
FAQ
What is the maximum continuous current per channel for LNBH24TPPR?
The LNBH24TPPR supports up to 500 mA per channel continuously, but total combined output current (IOUT_A + IOUT_B) must remain below 1 A to prevent triggering thermal protection. This limit is enforced by internal thermal sensing-not current sensing-and is validated at 25 °C ambient with proper PCB copper pour on the exposed pad.
How does the AUX bit enable reliable minimum-load detection in multi-IRD systems?
When AUX=1, the LNBH24TPPR forces VOUT to 22 V (typ.) and VUP to 22.75 V, overriding VSEL/LLC settings. This ensures it supplies the highest voltage on a shared coaxial bus, allowing accurate IMON flag detection even when other IRDs pull down the line-critical for validating cable continuity in multi-switch installations.
Can the 22 kHz tone be generated without using the I²C interface?
Yes-the 22 kHz tone can be triggered directly via DSQIN or EXTM pins without I²C involvement. DSQIN activates tone on VoTX with 0.5-cycle latency; EXTM accepts external 22 kHz TTL input and synchronizes internal tone generation with 1.5-cycle latency. TTX pin must be asserted first in both cases.
What is the purpose of the separate VCC and VCC-L supply pins?
VCC powers digital and switching circuitry (I²C, PWM, logic), while VCC-L supplies analog blocks (22 kHz oscillator, tone detector, voltage monitors). This separation minimizes noise coupling from high di/dt switching events into sensitive analog measurement paths-ensuring stable VMON and TMON diagnostics under full load.
LNBH24TPPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 36-PowerBFSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Converter, Analog and Digital Satellite STB Receivers/SatTV
- Voltage - Input:
- 8V ~ 15V
- Number of Outputs:
- 2
- Voltage - Output:
- 13.4V, 18.5V
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerSSO-36 EPD
LNBH24TPPR FAQ
1.How can I place an order for LNBH24TPPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LNBH24TPPR 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 LNBH24TPPR reliable?
The price and inventory of LNBH24TPPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LNBH24TPPR is usually 5 days.
3.What payment methods are accepted for LNBH24TPPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LNBH24TPPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LNBH24TPPR?
LNBH24TPPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LNBH24TPPR 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 LNBH24TPPR?
For technical support, including LNBH24TPPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LNBH24TPPR requirements.
6.How does Aetrix verify that LNBH24TPPR is sourced from the original manufacturer or authorized distributors?
All LNBH24TPPR 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 LNBH24TPPR meets industry standards.
7.What is the process for return or replacement of LNBH24TPPR?
All LNBH24TPPR units undergo pre-shipment inspection (PSI). If there is an issue with LNBH24TPPR, 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 LNBH24TPPR part is unused and in its original packaging.
Return procedure for LNBH24TPPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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