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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

STMicroelectronics LED7707

Name: LED7707
Brand: STMicroelectronics
SKU: LED7707
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LED7707

Manufacturer:: STMicroelectronics

Category:: LED Drivers

Package:: 24-VFQFN Exposed Pad

Datasheet:: LED7707.pdf

Description:: IC LED DRVR RGLTR PWM 24VFQFPN

Quantity:: RFQ Add To RFQ list

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Inventory:3,145

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Product details

Overview

LED7707 from STMicroelectronics is a monolithic 6-channel LED backlight driver with integrated boost converter, designed for LCD panel backlighting. It delivers up to 85 mA per channel with ±2% current matching, supports 4.5–36 V input, generates up to 36 V output (enabling 10 white LEDs/row), and features PWM dimming down to 1% duty cycle at 1 kHz - used in LCD monitors, TV panels, and GPS displays.

For engineers reviewing the LED7707 datasheet, LED7707 pinout, LED7707 application, or LED7707 equivalent, key selection criteria include its 6-row constant-current architecture, programmable soft-start, OVP/thermal/fault protection, and compatibility with ceramic output capacitors in space-constrained LCD backlight designs.

Technical Context

The LED7707 integrates two functionally independent sections: a peak-current-mode boost regulator with internal 280 mΩ MOSFET and adjustable 250 kHz–1 MHz switching frequency, and six precision current-sink generators with <10 µs minimum PWM on-time. Both sections share thermal shutdown and operate under coordinated control logic with dedicated FAULT and MODE pins for open/short LED detection.

Its analog supply chain uses an internal +5 V LDO (LDO5) powering AVCC, while current regulation relies on external RILIM resistors setting I_ROW = 1850 V / R_RILIM, and BILIM sets boost current limit via K_B = 1.2×10⁶ V/A. Fault management is configurable via MODE pin biasing (SGND for open-circuit, AVCC for short-circuit detection).

Key Specifications

Parameter	Value and Actual Design Meaning
Input voltage range	4.5 V to 36 V - accepts wide-range DC supplies including automotive 12 V and industrial 24 V rails without pre-regulation.
Boost output voltage	Up to 36 V - supports series strings of up to 10 white LEDs (V_F ≈ 3.6 V each) per row.
Row current capability	Adjustable up to 85 mA per channel - set by external RILIM resistor; ±2% matching ensures uniform brightness across rows.
PWM dimming resolution	1% min duty cycle at 1 kHz - enables fine-grained brightness control without visible flicker in display applications.
Switching frequency range	250 kHz to 1 MHz - adjustable via FSW pin resistor; external sync capability allows multi-device timing alignment.
Fault detection	Open- and short-circuit LED detection per row - signaled via open-drain FAULT pin; MODE pin selects fault response mode.
Thermal protection	150 °C shutdown with 30 °C hysteresis - prevents damage during sustained high-power operation in compact LCD enclosures.

Pinout & Package

VFQFPN-24 4×4 mm package with exposed thermal pad - optimized for high-power density and efficient heat dissipation in backlight driver PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
ROW1–ROW6	Current-sink outputs	Drive LED cathodes; each sinks up to 85 mA with matched accuracy; floating when disabled.
LX	Boost switch node	Drain of internal 280 mΩ MOSFET; connects to boost inductor and flywheel diode anode.
PGND	Power ground	Return path for boost MOSFET source; must be low-inductance connection to minimize switching noise.
AVCC / LDO5	Analog supply / LDO output	LDO5 provides regulated +5 V for internal analog circuitry; AVCC requires RC filtering for stability.
RILIM / BILIM	Current limit programming	RILIM sets row current (I_ROW = 1850 V / R_RILIM); BILIM sets boost peak current (K_B = 1.2×10⁶ V/A).
DIM / EN / FAULT	Control & status interface	DIM accepts PWM signal; EN enables device with soft-start; FAULT is open-drain fault indicator.
MODE / OVSEL / SS	Configuration & protection	MODE selects open/short fault detection; OVSEL sets OVP threshold; SS sets soft-start duration via capacitor.

Key Features

Feature	Design Value
Integrated boost + 6-channel current sinks	Reduces BOM count by eliminating external controller, MOSFET, and discrete current regulators in LCD backlight designs.
±2% inter-row current matching	Ensures consistent luminance across all six LED strings without per-channel calibration or trimming.
Programmable soft-start (SS pin)	Prevents inrush current and output voltage overshoot during power-up using external capacitor timing.
Ceramic-capacitor compatible boost loop	Enables use of small, reliable MLCCs instead of bulkier electrolytics - critical for slim display form factors.
LED open/short fault detection per row	Allows system-level fault isolation and graceful degradation - e.g., disabling faulty row while maintaining others.

Applications

LCD Monitor Backlight

TV Panel Backlight

Use Scenario: Driving 6 parallel LED strings behind a 24-inch IPS monitor panel with dynamic dimming.

IC Role / Device Role / Timing Role: LED7707 acts as primary backlight power manager - regulating boost voltage and sinking precise current per row synchronized to PWM dimming signals.

Use Value: Delivers uniform brightness with <10 µs dimming response and ±2% current matching, eliminating visible banding or row-to-row intensity variation.

Use Scenario: Powering edge-lit LED arrays in 43-inch 4K UHD TV backlights requiring high efficiency and thermal resilience.

IC Role / Device Role / Timing Role: Functions as integrated boost+driver IC - generating 36 V boost rail and delivering 60 mA per row with thermal shutdown at 150 °C.

Use Value: Enables compact design with single-chip solution, reducing board area by >30% versus discrete boost + 6x current sink approach.

PDA Display Backlight

GPS Navigation Panel

Use Scenario: Illuminating high-brightness transflective LCD in handheld PDA operating from 3.7 V Li-ion battery with boost conversion.

IC Role / Device Role / Timing Role: Provides regulated current to 6 LED rows while supporting pulse-skip mode at light load to extend battery life.

Use Value: Achieves >85% efficiency at 50% dimming level and maintains stable output even as battery voltage drops to 3.3 V.

Use Scenario: Backlighting ruggedized GPS panel in automotive environments subject to 12 V supply transients and temperature extremes.

IC Role / Device Role / Timing Role: Serves as fault-tolerant LED driver - detecting open/shorted LEDs and asserting FAULT signal for system diagnostics.

Use Value: Ensures continuous backlight operation with automatic row disable on failure, meeting automotive functional safety expectations.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED backlight driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX16832A	4-channel driver; no integrated boost; requires external MOSFET and controller; 70 mA max per channel.	Limited to smaller panels; lacks per-row fault detection and OVP programmability.	Choose when lower channel count suffices and discrete boost design is preferred for thermal partitioning.
TPS61165	Single-string boost LED driver; 1.2 A switch current; no multi-row current matching or FAULT reporting.	Suitable only for serial LED strings; cannot replace 6-row parallel architecture without redesign.	Select only for cost-sensitive single-string applications where row matching and fault management are unnecessary.

Compared with MAX16832A and TPS61165, the LED7707 uniquely integrates both boost regulation and six matched current sinks with comprehensive fault handling - making it the only single-package solution for medium-to-large LCD panels requiring uniform brightness, reliability, and minimal footprint.

Availability

LED7707 is available at Aetrix Electronics and suitable for LCD monitor backlighting, TV panel illumination, and GPS navigation display systems requiring stable component supply, long-term lifecycle support, and automotive-grade thermal robustness.

Supply support for LED7707 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, specializing in power management, analog, and microcontroller solutions for industrial, automotive, and consumer markets.

The LED7707 belongs to ST's LED backlight driver product line, engineered specifically for high-efficiency, multi-string LCD panel illumination with integrated protection and precise current regulation.

FAQ

What is the minimum PWM dimming frequency supported by LED7707?

The LED7707 supports PWM dimming down to 200 Hz with full 1%–100% duty-cycle control, as verified in Figure 30 of the datasheet. At 1 kHz (Figure 31), it maintains accurate current regulation and <10 µs minimum on-time, enabling flicker-free operation in high-refresh-rate displays without compromising dimming resolution.

How is overvoltage protection configured on LED7707?

OVP is set using an external resistor divider from boost output to OVSEL pin, with a 1.145 V internal reference threshold. The threshold voltage is calculated as V_OVP = 1.145 × (1 + R1/R2), where R1 connects to LX and R2 to SGND. This allows precise setting of protection point up to 36 V, preventing LED string overvoltage during transient conditions.

Can unused LED rows be left unconnected without affecting performance?

Yes - the LED7707 allows individual rows to be disabled via configuration, and unused ROWx pins may be left floating. The datasheet confirms that disabled rows are electrically isolated, and current matching among active rows remains unaffected. No pull-up/down resistors or termination is required on inactive outputs.

What thermal derating applies above 25 °C ambient?

With R_thJA = 42 °C/W, the LED7707's maximum allowable power dissipation decreases linearly above 25 °C. At 85 °C ambient, usable power drops to ~0.9 W (2.3 W × (1 − (85−25)/125)). Layout with exposed pad soldering and copper pour significantly improves thermal performance beyond the demo-board baseline.

LED7707 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

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)

LED7707 FAQ

1.How can I place an order for LED7707 through Aetrix?

Please submit a Request for Quotation (RFQ) for LED7707 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 LED7707 reliable?

The price and inventory of LED7707 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LED7707 is usually 5 days.

3.What payment methods are accepted for LED7707?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LED7707 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LED7707?

LED7707 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LED7707 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 LED7707?

For technical support, including LED7707 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LED7707 requirements.

6.How does Aetrix verify that LED7707 is sourced from the original manufacturer or authorized distributors?

All LED7707 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 LED7707 meets industry standards.

7.What is the process for return or replacement of LED7707?

All LED7707 units undergo pre-shipment inspection (PSI). If there is an issue with LED7707, 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 LED7707 part is unused and in its original packaging.

Return procedure for LED7707:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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