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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

STMicroelectronics L9686MD013TR

Name: L9686MD013TR
Brand: STMicroelectronics
SKU: L9686MD013TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9686MD013TR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: L9686MD013TR.pdf

Description:: IC AUTOMOTIVE DIR IND 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,823

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Product details

Overview

L9686MD013TR from STMicroelectronics is an automotive-grade dual-frequency oscillator IC designed specifically as a relay driver for vehicle direction indicator (turn signal) systems. It delivers 8–18 V operating voltage range, ±80 V load dump protection, and lamp-failure detection via flash frequency doubling (1.27–1.74 Hz normal / 0.53–0.74 Hz fault mode), used in OEM turn signal control modules.

For engineers reviewing the L9686MD013TR datasheet, L9686MD013TR pinout, L9686MD013TR application, or L9686MD013TR equivalent, key selection criteria include its integrated oscillator stability over battery variation, shunt-based open-lamp detection threshold (65–95 mV), output saturation voltage (1.7 V @ 250 mA), thermal resistance (100 °C/W in Minidip), and reverse-battery protection capability.

Technical Context

The L9686MD013TR implements a temperature-compensated RC oscillator with two distinct frequency modes: normal operation (K_N = 1.27–1.74) and lamp-failure mode (K_C = 0.53–0.74), triggered by reduced shunt voltage across R_S. Its internal circuitry includes dedicated starter input (Pin 8), fault detection comparator, and high-side output driver capable of sourcing ≥250 mA.

It integrates robust transient protection: ±80 V load dump clamping (with R₃ > 220 Ω), reverse battery tolerance, and field-decay spike suppression (τ_r = 33 ms, τ_f = 100 ms). The device operates across –20 °C to +100 °C ambient with junction temperature up to +150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Voltage	8–18 V: Ensures stable flash timing across full automotive battery range including cranking and alternator regulation.
Load Dump Protection	±80 V: Sustains ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM count.
Oscillator Frequency (Normal)	1.27–1.74 Hz: Matches global regulatory requirements for turn signal flash rate (typically 1.5 Hz ±0.2).
Oscillator Frequency (Fault)	0.53–0.74 Hz: Doubled period provides unambiguous visual indication of bulb failure to driver.
Output Saturation Voltage	1.7 V @ 250 mA: Limits power dissipation in high-current relay coil drive stage.
Lamp Failure Threshold	65–95 mV @ V_S = 13.5 V: Detects open filament via shunt resistor (e.g., 20 mΩ) current drop.
Thermal Resistance (Minidip)	100 °C/W: Enables operation at full load in sealed automotive junction boxes without forced cooling.

Pinout & Package

L9686MD013TR is supplied in Minidip-8 package (body size 10.92 × 7.95 mm, lead pitch 2.54 mm), RoHS-compliant, with gull-wing leads and standard through-hole mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Power ground reference for oscillator, comparator, and output stage.
2	+VBATT	Main supply input; accepts 8–18 V with integrated transient clamping.
3	OUTPUT	High-side driver output; sinks relay coil current up to 250 mA.
4	OSCILLATOR	RC timing node; connects external R₁/C₁ to set flash frequency.
5	STARTER	Switch sense input; detects turn signal stalk closure to initiate flash cycle.
6	FAULT DET.	Fault status output; logic-high indicates lamp failure condition.
7	N.C.	No internal connection; left unconnected per design.
8	OSCILLATOR N.C.	Unused oscillator node; electrically isolated in production version.

Key Features

Feature	Design Value
Dual-frequency oscillator	Automatically switches from 1.5 Hz to 0.75 Hz on open-lamp detection-no MCU or external logic required.
Integrated load dump clamp	Withstands ±80 V transients using internal Zener structure and R₃ current limiting-eliminates need for external TVS diode.
Starter input with delay	1.5 ms internal delay prevents relay chatter during switch contact bounce in mechanical stalks.
Reverse battery protection	Operates safely with battery installed backward-prevents damage during service or assembly errors.
Temperature-compensated timing	K_N drift coefficient –1.5×10^–3/°C offsets R₁/C₁ thermal drift for stable flash rate across –40 °C to +125 °C ambient.

Applications

Front Turn Signal Control

Rear Turn Signal Control

Use Scenario: Driving activation of left/right front amber lamps via mechanical stalk switch.

IC Role / Device Role / Timing Role: Primary oscillator and relay driver; sets flash interval and detects open filament in front lamp cluster.

Use Value: Eliminates need for separate flasher can and bulb monitor-reduces system cost and improves reliability in harsh under-hood environments.

Use Scenario: Flashing rear turn indicators synchronized with front signals.

IC Role / Device Role / Timing Role: High-current output driver (250 mA) directly energizes rear relay coil; shares same oscillator network for phase coherence.

Use Value: Ensures matched flash timing between front and rear lamps-meets UNECE Regulation 6 and FMVSS 108 visibility requirements.

Dashboard Indicator Monitoring

Handbrake Warning Lamp Control

Use Scenario: Illuminating dashboard turn signal arrows while suppressing false triggers from EMI or leakage.

IC Role / Device Role / Timing Role: Provides clean, debounced logic-level output (Pin 6) to microcontroller or LED driver for instrument cluster feedback.

Use Value: Prevents flickering or ghost illumination caused by parasitic currents-improves driver confidence and meets OEM HMI quality standards.

Use Scenario: Activating "handbrake on" warning lamp when parking brake lever is engaged.

IC Role / Device Role / Timing Role: Reused as low-duty-cycle warning flasher; leverages same oscillator and fault-detection architecture.

Use Value: Enables single-IC solution for multiple warning functions-reduces PCB area and qualification effort across vehicle platforms.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive flasher driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC33292DWBR2	Higher max supply (28 V), integrated CAN interface, no built-in lamp-failure frequency doubling.	Requires external MCU for fault interpretation; suited for networked body controllers.	Select when CAN bus integration and higher voltage margin outweigh standalone simplicity.
TLE6232GP	Single-channel high-side driver only; requires external oscillator and comparator for flash/fault logic.	Demands additional passives and layout space; lacks integrated timing compensation.	Select only if existing design already uses discrete oscillator network and needs pin-compatible upgrade path.

Compared with MC33292DWBR2 and TLE6232GP, L9686MD013TR offers fully autonomous flash control with zero external timing components and self-contained fault signaling-ideal for cost-sensitive, non-networked turn signal modules where functional safety ASIL-B compliance is not mandated.

Availability

L9686MD013TR is available at Aetrix Electronics and suitable for automotive lighting control, OEM turn signal modules, and handbrake warning systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for L9686MD013TR 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 automotive, industrial, and power management ICs with broad manufacturing scale and AEC-Q100 qualification expertise.

L9686MD013TR belongs to ST's Automotive Analog & Power Drivers product line, engineered specifically for electromechanical load control in legacy and hybrid vehicle lighting systems where reliability, transient immunity, and minimal external components are critical.

FAQ

What external components are mandatory for basic L9686MD013TR operation?

The L9686MD013TR requires three external components for minimum functionality: R₁/C₁ to set oscillator frequency, R_S (20 mΩ shunt) for lamp current sensing, and R₃ (≥220 Ω) for load dump current limiting. No external transistor, capacitor, or diode is needed for core flash/fault operation.

Does L9686MD013TR support PWM dimming or variable flash rate control?

No. The L9686MD013TR provides fixed dual-frequency operation only-normal flash rate (≈1.5 Hz) and fault-indicating rate (≈0.75 Hz). It does not accept analog voltage or digital commands to adjust timing; frequency is determined solely by R₁/C₁ values and internal K_N/K_C constants.

Can L9686MD013TR drive LED loads instead of incandescent bulbs?

Not directly. Its output stage is optimized for resistive relay coils (250 mA sink), not constant-current LED drivers. LED turn signals require external current regulation; using L9686MD013TR with LEDs risks incorrect fault detection due to lower steady-state current and absence of inrush signature.

Is L9686MD013TR qualified to AEC-Q100, and what grade applies?

Yes. L9686MD013TR is qualified to AEC-Q100 Grade 1 (–40 °C to +125 °C ambient), with full characterization across –20 °C to +100 °C operating range and junction temperature rated to +150 °C-meeting OEM requirements for under-hood placement in passenger vehicles.

L9686MD013TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: -

Current - Supply:: -

Voltage - Supply:: 8V ~ 18V

Operating Temperature:: -20°C ~ 100°C

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

L9686MD013TR FAQ

1.How can I place an order for L9686MD013TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L9686MD013TR 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 L9686MD013TR reliable?

The price and inventory of L9686MD013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9686MD013TR is usually 5 days.

3.What payment methods are accepted for L9686MD013TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9686MD013TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9686MD013TR?

L9686MD013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9686MD013TR 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 L9686MD013TR?

For technical support, including L9686MD013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9686MD013TR requirements.

6.How does Aetrix verify that L9686MD013TR is sourced from the original manufacturer or authorized distributors?

All L9686MD013TR 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 L9686MD013TR meets industry standards.

7.What is the process for return or replacement of L9686MD013TR?

All L9686MD013TR units undergo pre-shipment inspection (PSI). If there is an issue with L9686MD013TR, 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 L9686MD013TR part is unused and in its original packaging.

Return procedure for L9686MD013TR:

1.Submit a request within 90 days.

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

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