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Diodes Incorporated AL5814QMP-13
- Part No.:
- AL5814QMP-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
AL5814QMP-13.pdf
- Description:
- IC LED DRVR LIN PWM 15MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:830
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Product details
Overview
AL5814QMP-13 from Diodes Incorporated is an automotive-grade 8-pin linear LED controller IC designed for medium-to-high current LED lighting in vehicle rear, interior, and position lamps. It operates from 4.5V to 60V input, delivers up to 15mA output drive capability, features ±5% reference voltage tolerance over temperature, supports thermal foldback via NTC on VSET, and provides LED-open detection with auto-recovery via VFAULT pin.
For engineers reviewing the AL5814QMP-13 datasheet, AL5814QMP-13 pinout, AL5814QMP-13 application in automotive lighting, or AL5814QMP-13 equivalent for AEC-Q100 Grade 1 LED driver replacement, this page delivers verified electrical behavior, validated thermal protection thresholds, confirmed PWM dimming implementation via VFAULT, and exact MSOP-8EP package interface details.
Technical Context
The AL5814QMP-13 implements a precision current-regulated feedback loop using internal 0.4V reference (±5% over −40°C to +125°C), VSET-controlled threshold comparison, and error amplifier with 4A/V transconductance and 50kHz bandwidth. Its VFAULT pin integrates a 14µA current source and 2.5V threshold comparator with 100mV hysteresis for open-load detection.
It uses external bipolar transistors or MOSFETs as primary power switches, offloading power dissipation from the IC. The SFAULT pin enables configurable VCC-dependent activation of open-detection logic, preventing false triggers during startup by requiring VCC ≥ 11 × R7 × 50µA before enabling fault monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports direct connection to automotive battery rail including cold-crank and load-dump conditions. |
| Reference Voltage (VREF) | 0.4V ±5% - sets baseline accuracy for LED current regulation across full operating temperature range. |
| VFAULT Threshold | 2.5V ±0.14V - triggers immediate OUT disable when any LED string opens, with 100mV hysteresis for noise immunity. |
| OUT Drive Capability | −15mA max sourcing at 25°C - sufficient to directly drive gate/base of external N-channel MOSFETs or NPN transistors. |
| Thermal Shutdown | +160°C with +30°C hysteresis - protects die during sustained overload or poor PCB thermal design. |
| Undervoltage Lockout | 4.2V (rising), 3.85V (falling) - prevents erratic operation during brown-out or ignition-cycle transitions. |
| Junction-to-Ambient θJA | 56°C/W - requires minimum 51mm × 51mm 2oz copper pad with thermal vias for full 15mA drive capability at 125°C ambient. |
Pinout & Package
AL5814QMP-13 is housed in a thermally enhanced MSOP-8EP (exposed pad) package, optimized for automotive under-hood and lamp-module thermal environments. The exposed pad must be soldered to a large-area contiguous GND copper plane - not used as sole GND connection - to achieve rated 56°C/W θJA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Supply input | Primary power rail input; powers internal circuitry and supplies bias to OUT driver stage. |
| 2 REF | Internal reference voltage | 0.4V precision reference; drives resistor divider to VSET for accurate current setting; limited to ≤50µA load. |
| 3 VSET | Current-setting threshold | Sets FB regulation point; voltage here determines LED current; pulled low if floating; supports NTC-based thermal foldback. |
| 4 GND | Ground reference | Analog and power ground return; must be low-impedance path to minimize noise coupling into FB and VSET nodes. |
| 5 FB | Feedback input | Regulated to match VSET voltage; connected to sense-resistor node; internal pull-up if floating. |
| 6 SFAULT | VCC enable level setting | Configures VCC threshold for LED-open detection activation; 50µA current source sets trip point with external resistor. |
| 7 OUT | Driving output | 15mA max sourcing output; drives base/gate of external transistor; requires VCC ≥ VOUT + 3V for full current capability. |
| 8 VFAULT | LED-open detection input | 14µA current source; pulls low (<2.5V) during open-circuit fault; also accepts PWM signal for dimming control. |
| EP | Exposed pad | Thermal and electrical GND connection; must be soldered to large copper area with multiple thermal vias for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C ambient operation with PPAP documentation support - meets automotive production requirements. |
| PWM dimming via VFAULT | VFAULT accepts open-drain/drain PWM signal to directly modulate OUT state - eliminates need for external logic or gate drivers. |
| Configurable thermal foldback | VSET accepts NTC-based resistor network to reduce LED current as temperature rises - prevents thermal runaway without external ICs. |
| LED-open detection with auto-retry | VFAULT-triggered shutdown includes automatic retry cycle upon fault removal - ensures recovery without system-level reset. |
| Low-temperature drift reference | 0.4V reference exhibits <3mV line regulation and <6mV load regulation - maintains current accuracy across battery voltage and load variations. |
Applications
| Automotive Rear Lamps | Automotive Interior Lamps |
|---|---|
|
Use Scenario: Tail light and brake light modules requiring stable current regulation across 9–16V battery range and transient spikes. IC Role / Device Role / Timing Role: Linear LED controller regulating current through red/amber LED strings via external MOSFET; VFAULT monitors open strings. Use Value: Eliminates need for switching regulators in space-constrained rear lamp housings while maintaining AEC-Q100 compliance and thermal safety. |
Use Scenario: Dashboard backlighting and ambient lighting where EMI-sensitive analog circuits coexist with LED drivers. IC Role / Device Role / Timing Role: Low-noise linear current source controlling white LED brightness; PWM dimming implemented directly on VFAULT pin. Use Value: Avoids switching regulator EMI that interferes with CAN bus or sensor signals; thermal foldback protects LEDs during prolonged cabin heat exposure. |
| Automotive Instrumentation Illumination | Automotive License Plate Illumination |
|
Use Scenario: High-reliability illumination behind analog gauges and digital displays in instrument clusters. IC Role / Device Role / Timing Role: Precision current regulator driving multiple parallel LED strings; SFAULT configures fault detection only after stable VCC. Use Value: Ensures consistent brightness across all segments despite varying forward voltages; open-load detection prevents single-string failure from disabling entire cluster. |
Use Scenario: Compact, sealed license plate lamp modules exposed to wide ambient temperature swings and moisture. IC Role / Device Role / Timing Role: Thermally robust LED driver with integrated OTP and NTC-based foldback; MSOP-8EP package enables high-density PCB layout. Use Value: Maintains regulated current down to −40°C and folds back above 85°C - extends LED life and avoids thermal stress in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL5815QMP-13 | Same pinout and function but adds integrated 1.2V reference bypass option; no VSET pin - fixed reference architecture. | Requires redesign of current-setting network; lacks NTC-based thermal foldback flexibility. | Select when simplified BOM and elimination of VSET resistor divider outweigh need for thermal compensation. |
| MAX16820ATP+ | Higher 20mA drive; wider 4.5V–65V input; but no integrated VFAULT hysteresis or SFAULT startup delay configuration. | Lacks built-in open-load auto-retry and configurable fault-enable timing - requires external logic for robust automotive use. | Choose only if higher drive current is mandatory and external fault-handling circuitry is acceptable. |
Compared with AL5814QMP-13, AL5815QMP-13 sacrifices thermal foldback configurability for reference simplicity, while MAX16820ATP+ offers higher drive but demands external fault management - making AL5814QMP-13 uniquely balanced for AEC-Q100-compliant, thermally adaptive LED lamp designs.
Availability
AL5814QMP-13 is available at Aetrix Electronics and suitable for automotive rear lamps, instrumentation illumination, and license plate lighting requiring stable component supply, AEC-Q100 Grade 1 qualification, and PPAP-ready documentation.
Supply support for AL5814QMP-13 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with manufacturing and test facilities across Asia and North America.
The AL5814QMP-13 belongs to Diodes' automotive LED driver product line, engineered specifically for thermally demanding, safety-critical exterior and interior lighting systems requiring precise current regulation and robust fault handling.
FAQ
What is the maximum LED string voltage supported by AL5814QMP-13?
The AL5814QMP-13 does not directly drive LEDs - it controls external MOSFETs or BJTs. Its OUT pin supports up to 4V output voltage at −1mA, but practical string voltage is limited by VCC minus dropout (VCC − VOUT ≥ 3V). With 60V VCC, LED strings up to ~57V are feasible when paired with appropriately rated external switches and sense resistors.
Can AL5814QMP-13 drive multiple LED strings simultaneously?
Yes - the device supports parallel LED strings by connecting sense resistors from each string to a common FB node. Matching transistor types, sense resistors, and base/gate resistors ensures current balancing. The datasheet confirms dual-string operation in Figure 4, with identical ILED = VVSET / RS1 for each channel.
How is thermal foldback implemented using the VSET pin?
VSET accepts a resistor divider between REF and GND, where one resistor is replaced with an NTC thermistor. As temperature rises, NTC resistance drops, lowering VSET voltage - which reduces the FB regulation target and thus LED current. This passive, self-contained method avoids external temperature sensors or microcontrollers.
What is the role of the SFAULT pin beyond open-load detection?
SFAULT sets the VCC threshold at which LED-open detection becomes active. Using a resistor to GND creates a voltage divider with internal 50µA current source; detection only engages once VCC exceeds that threshold. This prevents false trips during power-up or brown-out, ensuring fault monitoring activates only during stable operation.
AL5814QMP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 60V
- Voltage - Output:
- 4V
- Current - Output / Channel:
- 15mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
AL5814QMP-13 FAQ
1.How can I place an order for AL5814QMP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL5814QMP-13 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 AL5814QMP-13 reliable?
The price and inventory of AL5814QMP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL5814QMP-13 is usually 5 days.
3.What payment methods are accepted for AL5814QMP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL5814QMP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL5814QMP-13?
AL5814QMP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL5814QMP-13 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 AL5814QMP-13?
For technical support, including AL5814QMP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL5814QMP-13 requirements.
6.How does Aetrix verify that AL5814QMP-13 is sourced from the original manufacturer or authorized distributors?
All AL5814QMP-13 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 AL5814QMP-13 meets industry standards.
7.What is the process for return or replacement of AL5814QMP-13?
All AL5814QMP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL5814QMP-13, 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 AL5814QMP-13 part is unused and in its original packaging.
Return procedure for AL5814QMP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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