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STMicroelectronics LED7707TR
- Part No.:
- LED7707TR
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
LED7707TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 24VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:6,329
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Product details
Overview
LED7707TR from STMicroelectronics is a monolithic 6-channel LED backlight driver with integrated boost converter, designed for LCD panel illumination. It delivers up to 85 mA per channel (±2% matching), supports 4.5–36 V input, regulates up to 36 V output, and enables PWM dimming down to 1% duty cycle at 1 kHz - used in LCD monitors, TV panels, and GPS displays.
For engineers reviewing the LED7707TR datasheet, LED7707TR pinout, LED7707TR application, or LED7707TR equivalent, key selection criteria include row current programmability via RILIM, adjustable 250 kHz–1 MHz switching frequency, open/short LED fault detection, and VFQFPN-24 thermal performance under continuous backlight load conditions.
Technical Context
The LED7707TR integrates a constant-frequency peak-current-mode boost controller with internal 280 mΩ MOSFET and +5 V LDO (LDO5) for analog supply, enabling self-contained operation from a single input rail. Its boost section supports external synchronization and pulse-skip mode for light-load efficiency.
The six current-sink rows operate independently with programmable per-row current (via RILIM resistor), <10 µs minimum PWM on-time, and dedicated FAULT/MODE pins for open-circuit and short-circuit LED failure detection - each row can be disabled individually without affecting others.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 4.5 V to 36 V - accepts wide industrial and automotive supply rails without pre-regulation. |
| Max output voltage | 36 V - drives up to 10 white LEDs (3.6 V VF each) in series per row. |
| Row current accuracy | ±2% matching between all 6 channels - ensures uniform brightness across LCD backlight zones. |
| Switching frequency | 250 kHz to 1 MHz (adjustable via FSW pin) - balances EMI, efficiency, and inductor size. |
| PWM dimming capability | 1% min duty cycle at 1 kHz - enables fine-grained brightness control without visible flicker. |
| Fault detection | Open- and short-circuit LED detection per row - triggers open-drain FAULT pin for system-level error handling. |
| Thermal shutdown | 150 °C turn-off with 30 °C hysteresis - protects device during sustained high-power operation. |
Pinout & Package
LED7707TR uses the VFQFPN-24 4×4 mm exposed-pad package, optimized for thermal dissipation in space-constrained backlight modules. The thermally enhanced pad must be soldered to PCB ground plane for reliable operation at full 6-row load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ROW1–ROW6 | Current-sink outputs | Each sinks up to 85 mA; externally programmed via RILIM; independent disable possible. |
| VIN | Main power input | Supplies both boost stage and internal LDO5; accepts 4.5–36 V DC. |
| LX | Boost switch node | Drain of internal 280 mΩ MOSFET; connects to boost inductor and flywheel diode. |
| AVCC / LDO5 | Analog & IC supply | LDO5 provides regulated +5 V for internal circuitry; AVCC is filtered analog reference. |
| DIM | PWM brightness control | Accepts 0–5 V logic-level PWM signal; supports 1%–100% dimming at 1 kHz. |
| FAULT | Open-drain fault indicator | Asserts low on LED open/short fault; requires external pull-up for system interrupt. |
| MODE | Fault management mode select | Tied to SGND or AVCC to configure open vs. short detection behavior per row. |
| RILIM | Row current programming | Resistor to SGND sets all row currents: IROW = 1850 V / RRILIM. |
| FSW | Freq. setting / sync input | Resistor to SGND selects 250–1000 kHz; also accepts external sync clock for multi-device timing alignment. |
| EN | Enable control | Active-high; internal 2.5 mA pull-up allows direct tie-high or microcontroller control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boost + 6-channel sink | Eliminates need for external DC-DC and current-setting ICs - reduces BOM count and layout area. |
| Ceramic-capacitor compatible | Stable with low-ESR ceramic output caps - avoids bulky electrolytics and improves reliability. |
| Programmable soft-start | Capacitor on SS pin controls startup ramp rate - prevents inrush current and output overshoot. |
| Per-row LED fault isolation | Open/short detection per channel with FAULT pin assertion - enables graceful degradation instead of full backlight shutdown. |
| Pulse-skip light-load mode | Reduces switching losses below ~20% load - extends battery life in portable display applications. |
Applications
| LCD Monitor Backlight | TV Panel Backlight |
|---|---|
|
Use Scenario: 24-inch desktop monitor with edge-lit WLED array requiring uniform luminance and dynamic dimming. IC Role / Device Role / Timing Role: Primary LED driver and boost controller; manages 6 parallel rows of 8–10 LEDs each with synchronized PWM dimming. Use Value: ±2% current matching eliminates visible banding; 36 V output supports high-VF LED strings; FAULT pin enables real-time health monitoring. |
Use Scenario: 43-inch smart TV backlight using local dimming zones driven by multiple LED7707TRs in synchronized configuration. IC Role / Device Role / Timing Role: Zone-specific current sink with external SYNC pin coordination to eliminate beat frequencies between adjacent drivers. Use Value: Adjustable 250–1000 kHz switching avoids audible noise; pulse-skip mode cuts standby power; thermal shutdown prevents hot-spot failure. |
| PDA Display Backlight | Automotive GPS Display |
|
Use Scenario: Handheld PDA with QVGA LCD requiring compact, low-noise backlight solution powered from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Boost + driver combo enabling direct battery operation; DIM pin accepts MCU-generated 1 kHz PWM for UI brightness control. Use Value: 1% min dimming duty cycle enables deep black levels; 4.5 V UVLO ensures stable start even as battery discharges. |
Use Scenario: In-dash automotive GPS unit operating across -40°C to +85°C ambient with vibration-prone mounting. IC Role / Device Role / Timing Role: Robust LED driver with thermal shutdown and fault reporting; operates from 9–16 V vehicle supply with transient tolerance. Use Value: 150 °C junction shutdown protects against enclosure overheating; open/short detection alerts ECU to backlight failure before safety-critical visibility loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16832ATP+ | 4-channel, 120 mA max per channel; no integrated boost; requires external MOSFET and inductor control. | Suitable for lower-channel-count designs where board space allows discrete boost stage. | Select when higher per-channel current (>85 mA) is required and boost loop tuning flexibility is prioritized over integration. |
| TPS61165DRVR | Single-channel, 50 mA max; integrated boost only; no multi-row current matching or fault detection. | Used in small displays (e.g., smartwatch) where cost and size outweigh channel count needs. | Choose only for single-row applications with simple dimming; not viable for 6-row LCD backlight replacement. |
Compared with MAX16832ATP+ and TPS61165DRVR, LED7707TR uniquely combines 6-channel precision current sinking, integrated boost, and per-row fault management in a single VFQFPN-24 package - reducing component count, improving thermal predictability, and enabling fail-safe backlight operation in mid-to-large panel designs.
Availability
LED7707TR is available at Aetrix Electronics and suitable for LCD monitor backlighting, TV panel illumination, and automotive GPS display systems requiring stable component supply, long-term manufacturability, and automotive-grade thermal resilience.
Supply support for LED7707TR 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, delivering robust analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The LED7707TR belongs to ST's LED backlight driver product line, engineered specifically for high-reliability, multi-row LCD panel illumination with integrated power conversion and comprehensive fault protection.
FAQ
What is the minimum PWM dimming frequency supported without visible flicker?
The LED7707TR supports 1 kHz PWM dimming with 1% minimum duty cycle, producing imperceptible flicker in static and scrolling display content. Its <10 µs minimum on-time ensures precise low-brightness control, and the internal current regulation maintains stability across the full 1–100% dimming range without color shift or current droop.
How does the FAULT pin behave during an open LED condition?
When an open LED fault occurs on any enabled row, the FAULT pin pulls low (≤380 mV at 4 mA sink) and remains asserted until the fault is cleared and EN is toggled or the device resets. The MODE pin state determines whether open or short detection is active; with MODE tied to SGND, open faults trigger FAULT assertion while short faults do not.
Can the LED7707TR drive more than 10 LEDs per row?
No - the 36 V maximum boost output limits practical string length to 10 white LEDs (assuming typical 3.6 V forward voltage). Exceeding this risks violating the absolute maximum LX-to-SGND rating of 40 V and may cause premature OVP triggering or regulator instability due to reduced loop margin at high output impedance.
Is external compensation required for the boost loop?
Yes - the COMP pin requires an RC network (resistor + capacitor to SGND) to stabilize the boost regulator's feedback loop. ST recommends specific values based on inductor value, output capacitance, and target crossover frequency; omitting or mis-sizing this network causes oscillation, poor transient response, or failure to regulate under load changes.
LED7707TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 85mA
- Frequency:
- 250kHz ~ 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VFQFPN (4x4)
LED7707TR FAQ
1.How can I place an order for LED7707TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LED7707TR 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 LED7707TR reliable?
The price and inventory of LED7707TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LED7707TR is usually 5 days.
3.What payment methods are accepted for LED7707TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LED7707TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LED7707TR?
LED7707TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LED7707TR 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 LED7707TR?
For technical support, including LED7707TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LED7707TR requirements.
6.How does Aetrix verify that LED7707TR is sourced from the original manufacturer or authorized distributors?
All LED7707TR 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 LED7707TR meets industry standards.
7.What is the process for return or replacement of LED7707TR?
All LED7707TR units undergo pre-shipment inspection (PSI). If there is an issue with LED7707TR, 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 LED7707TR part is unused and in its original packaging.
Return procedure for LED7707TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LED7707TR Tags
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BCR420UE6433HTMA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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