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

Diodes Incorporated AP8803WTG-7

Name: AP8803WTG-7
Brand: Diodes Incorporated
SKU: AP8803WTG-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP8803WTG-7

Manufacturer:: Diodes Incorporated

Category:: LED Drivers

Package:: SOT-23-5 Thin, TSOT-23-5

Datasheet:: AP8803WTG-7.pdf

Description:: IC LED DRV RGLTR PWM 1A TSOT23-5

Quantity:: RFQ Add To RFQ list

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Inventory:1,910

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Product details

Overview

AP8803WTG-7 from Diodes Incorporated is a 30V, 1A step-down DC/DC LED driver IC with hysteretic current regulation, designed to drive up to 7 series-connected LEDs from 8–30V input. It delivers constant current via external R_SET, supports PWM/analog dimming at CTRL, and switches up to 700kHz for compact magnetics in automotive interior lighting and industrial signage.

For engineers reviewing the AP8803WTG-7 datasheet, AP8803WTG-7 pinout, AP8803WTG-7 application, or AP8803WTG-7 equivalent, key selection criteria include its 1A continuous switch current, TSOT25 thermal resistance (125°C/W), open-circuit LED protection, 100mV internal current-sense threshold, and 0.5Ω typical R_DS(on) - all critical for high-efficiency, thermally constrained LED power stages.

Technical Context

The AP8803 operates as a hysteretic (constant-on-time) current-mode buck regulator: internal comparator monitors voltage across R_SET against 92–108mV thresholds to toggle the integrated 1.25A MOSFET switch. Its fixed-frequency-free architecture eliminates external compensation and enables fast transient response without loop stability concerns.

Dimming is implemented via dual-path control: analog mode uses 0.3–2.5V DC at CTRL to scale output current from 24% to 200% of nominal I_LED, while PWM dimming (≤500Hz, 8-bit resolution) modulates average current above/below the R_SET-set baseline - both paths share the same 0.2V shutdown threshold.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	8V to 30V continuous - supports 12V/24V automotive and industrial rails without pre-regulation.
Max Output Current	1A constant LED current - set by R_SET = 0.1V / I_OUT; enables single-channel high-brightness LED strings.
Switching Frequency	Up to 700kHz - allows ≤47µH inductors and <10mm² total passive footprint in space-constrained PCBs.
Current Sense Threshold	100mV typ (92–108mV) - low-voltage sensing minimizes R_SET power loss and improves efficiency at high I_LED.
R_DS(on)	0.5Ω typ (1Ω max) - reduces conduction loss in the internal MOSFET, critical for thermal management in TSOT25 package.
Thermal Resistance θ_JA	125°C/W (TSOT25, 25×25mm 2oz Cu) - defines derating curve: full 1A only below +85°C ambient per Figure 8.
CTRL Pin Shutdown Threshold	≤0.2V - ensures reliable system-level enable/disable with standard logic-level GPIO or optocoupler outputs.

Pinout & Package

AP8803WTG-7 is housed in a 5-pin TSOT25 (Thin Small Outline Transistor) package with exposed thermal pad (pin 5 = SW). The package measures 2.90×1.60×0.90mm and is RoHS-compliant, halogen-free, and lead-free.

Pin/Terminal	Circuit Role	Design Meaning
1: SET	Current Sense Reference Input	Connects to R_SET between VIN and GND; sets nominal I_LED = 0.1V / R_SET; high-impedance (1.25µA max) input.
2: VIN	Main Power Input	8–30V supply input; requires ≥2.2µF X7R ceramic decoupling capacitor directly to GND for stability.
3: CTRL	Dimming & Enable Control	Analog/PWM dimming input; 0.2V shutdown, 0.3–2.5V analog scaling, ≤500Hz PWM; internal 200kΩ pull-up to 1.25V reference.
4: GND	Power & Signal Ground	Common return for VIN, SET, CTRL, and SW freewheeling path; must be low-inductance connection to minimize EMI.
5: SW	Power Switch Node	Drives external inductor and Schottky diode; high dv/dt node - shortest possible trace length required to reduce radiated emissions.

Key Features

Feature	Design Value
Hysteretic Current Regulation	Eliminates external compensation components and provides inherent stability across input/output voltage and temperature variations.
Built-in Open-Circuit LED Protection	Halts switching and clamps SW to GND if LED string opens - prevents overvoltage stress on internal MOSFET and external diode.
Soft-Start via CTRL Capacitor	External capacitor from CTRL to GND provides programmable startup delay (0.5ms/nF), preventing inrush current in multi-string systems.
Thermally Optimized TSOT25	Exposed thermal pad and low θ_JA (125°C/W) enable 1A operation with minimal copper area - ideal for dense LED modules.
Low Quiescent Current	1.8–5mA IQ (CTRL floating) - maintains efficiency in always-on lighting systems with standby modes.

Applications

Automotive Interior Lighting

Industrial Panel Indicators

Use Scenario: Illuminating dashboard backlighting, footwell lamps, and door courtesy lights in 12V/24V vehicles.

IC Role / Device Role / Timing Role: Constant-current buck controller regulating single-string white LEDs (3–4V each) with analog dimming synchronized to vehicle CAN bus commands.

Use Value: 92% peak efficiency and 700kHz switching minimize heat buildup in confined dash cavities and allow use of 3.3×3.3mm inductors.

Use Scenario: Driving status LEDs on PLC I/O modules, HMI panels, and safety-rated control cabinets.

IC Role / Device Role / Timing Role: High-reliability LED driver with open-circuit fault detection, ensuring visual alarm integrity during field wiring faults.

Use Value: Built-in open-LED protection prevents false "off" indications and eliminates need for external monitoring circuitry.

Architectural Accent Lighting

Commercial Signage

Use Scenario: Linear LED strips for cove lighting, stair treads, and retail display edges powered from 24V centralized supplies.

IC Role / Device Role / Timing Role: Compact, thermally efficient current source enabling 1A per channel in ultra-thin aluminum extrusions with limited heatsinking.

Use Value: TSOT25 package and 125°C/W θ_JA allow full 1A output with only 25×25mm 2oz Cu PCB area - no external heatsink required.

Use Scenario: Channel letter and backlit logo modules in outdoor signage operating from 30V DC power supplies.

IC Role / Device Role / Timing Role: Robust LED driver supporting wide input range (8–30V) to accommodate voltage drop over long cable runs and battery backup scenarios.

Use Value: 30V absolute max VIN rating and 40V transient tolerance ensure reliability during load-dump events in commercial power systems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL8803WT-7	Same die, identical electrical specs; marking code differs (AL vs AP prefix); functionally interchangeable.	No difference - used interchangeably in Diodes' own reference designs and customer BOMs.	Select AL8803WT-7 when sourcing from alternate Diodes lot codes or legacy inventory; no design change required.
MPQ3367AGL-AEC1-P	Higher 1.5A output, AEC-Q100 Grade 1 qualified, but requires external compensation and has larger QFN-16 package.	Suitable for automotive exterior lighting (headlamps, DRLs); not drop-in due to pin count, footprint, and control interface differences.	Choose MPQ3367 for AEC-Q100 compliance and >1A needs; avoid for space-constrained interior or signage where TSOT25 is mandatory.

Compared with AL8803WT-7, AP8803WTG-7 offers identical performance in a fully compatible form factor; versus MPQ3367, it trades higher current and qualification for smaller size, simpler layout, and lower system cost in non-automotive-grade applications.

Availability

AP8803WTG-7 is available at Aetrix Electronics and suitable for automotive interior lighting, industrial panel indicators, and architectural accent lighting requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP8803WTG-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.

The AP8803 belongs to Diodes' LED Driver product line, engineered specifically for cost-sensitive, thermally constrained constant-current LED applications where simplicity, small footprint, and robust fault handling are prioritized over programmability or multi-channel integration.

FAQ

What is the minimum recommended inductor value for AP8803WTG-7 at 24V input?

A 33µH inductor is recommended for most 24V applications driving 3 LEDs, per Diodes' Figure 3. Lower values (e.g., 22µH) increase peak current and reduce efficiency; higher values (≥47µH) improve current ripple but require larger physical size. Inductor saturation current must exceed 1.25A to avoid core saturation under worst-case duty cycle.

Can AP8803WTG-7 drive more than 7 LEDs in series?

No - the device's maximum output voltage headroom is limited by its 30V input rating and internal switch voltage drop. With typical LED V_F of 3.2V, 7 LEDs require ~22.4V, leaving <7.6V for inductor drop and diode loss. Driving 8+ LEDs risks insufficient headroom, causing regulation failure or thermal shutdown, especially at low input voltages or high ambient temperatures.

How does the CTRL pin behave when left floating?

When floating, the internal 200kΩ pull-up resistor biases CTRL to 1.25V, setting nominal LED current (I_OUT,nom). This is the default operational state - no external components needed for basic constant-current operation. Floating CTRL also enables soft-start via optional capacitor to GND, but disables active dimming or shutdown control.

Is AP8803WTG-7 suitable for use with PWM dimming frequencies above 500Hz?

No - the internal CTRL filter bandwidth limits effective PWM dimming to ≤500Hz. Higher frequencies cause incomplete averaging of the PWM signal, resulting in visible flicker and inaccurate current scaling. For >500Hz dimming, external analog dimming (DAC + RC filter) or a different driver with faster CTRL response is required.

AP8803WTG-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-23-5 Thin, TSOT-23-5

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Down (Buck)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 8V

Voltage - Supply (Max):: 30V

Voltage - Output:: -

Current - Output / Channel:: 1A (Switch)

Frequency:: 700kHz

Dimming:: Analog, PWM

Applications:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-5

AP8803WTG-7 FAQ

1.How can I place an order for AP8803WTG-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP8803WTG-7 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 AP8803WTG-7 reliable?

The price and inventory of AP8803WTG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP8803WTG-7 is usually 5 days.

3.What payment methods are accepted for AP8803WTG-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP8803WTG-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP8803WTG-7?

AP8803WTG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP8803WTG-7 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 AP8803WTG-7?

For technical support, including AP8803WTG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP8803WTG-7 requirements.

6.How does Aetrix verify that AP8803WTG-7 is sourced from the original manufacturer or authorized distributors?

All AP8803WTG-7 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 AP8803WTG-7 meets industry standards.

7.What is the process for return or replacement of AP8803WTG-7?

All AP8803WTG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP8803WTG-7, 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 AP8803WTG-7 part is unused and in its original packaging.

Return procedure for AP8803WTG-7:

1.Submit a request within 90 days.

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

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