My Inquiry
My Account
Diodes Incorporated AP5726WUG-7
- Part No.:
- AP5726WUG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP5726WUG-7.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,815
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP5726WUG-7 from Diodes Incorporated is a white LED step-up DC/DC converter IC with integrated 0.95Ω MOSFET, 1.2MHz fixed-frequency operation, 0.31V feedback reference, over-voltage protection (OVP threshold = 30V), and support for 2–6 series LEDs from a 2.7–5.5V input. It delivers constant-current drive for backlighting in portable consumer electronics.
For engineers reviewing the AP5726WUG-7 datasheet, AP5726WUG-7 pinout, AP5726WUG-7 application, or AP5726WUG-7 equivalent, key selection criteria include its 1.2MHz switching frequency enabling compact 22μH inductors, low 0.31V VFB minimizing RSET power loss, integrated OVP and thermal shutdown, and TSOT23-6 package compatibility with space-constrained handheld designs.
Technical Context
The AP5726WUG-7 implements a current-mode boost controller with internal 1.2MHz oscillator, ramp generator, and comparator-based PWM control loop. Its 0.31V reference voltage feeds into an error amplifier that regulates LED current via external RSET, while the OVP pin monitors output voltage through a resistive divider to disable switching when exceeding 30V.
It integrates protection features including under-voltage lockout (UVLO at 2.3V nominal), thermal shutdown (TJ = 150°C), and current-limit protection (750mA peak switch current). The EN pin provides logic-level on/off control with 1.5V high threshold and 0.4V low threshold, requiring pull-up if unused.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz - Enables use of small 22μH inductors and 1μF ceramic capacitors, reducing board area by >40% vs. 500kHz solutions. |
| Feedback Voltage | 0.31 V - Minimizes I²R loss in current-sense resistor; e.g., 20mA LED current requires only 15.5Ω RSET, dissipating just 6.2μW in the resistor. |
| OVP Threshold | 30 V - Protects internal SW and OVP pins during LED open-circuit faults; triggers shutdown before reaching absolute max 34V rating. |
| MOSFET RDS(on) | 0.95 Ω - Limits conduction loss at 750mA peak switch current; contributes <120mW loss at full load, supporting >84% typical efficiency. |
| Input Voltage Range | 2.7–5.5 V - Matches single-cell Li-ion (3.0–4.2V) and dual-cell alkaline (2.4–3.2V) sources without external regulators. |
| LED Configuration | 2–6 in series - Ensures uniform brightness across all LEDs without ballast resistors; supports parallel-string operation with shared feedback. |
Pinout & Package
AP5726WUG-7 is packaged in a 6-pin TSOT23-6 (Thin Small Outline Transistor) surface-mount package with 0.65mm pitch, 2.9mm × 1.6mm footprint, and exposed thermal pad for enhanced heat dissipation. Pin 1 is marked with a dot; top-view orientation matches standard JEDEC TSOT23-6 layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Power Switch Node | Connects to inductor and Schottky diode anode; high dv/dt node requiring minimal trace area to suppress EMI. |
| 2 (VIN) | Input Supply | Accepts 2.7–5.5V; must be bypassed with ≥1μF ceramic capacitor placed within 2mm of pin to stabilize input impedance. |
| 3 (OVP) | Over-Voltage Sense Input | Monitors scaled output voltage; triggers shutdown when divided voltage exceeds 30V threshold (e.g., 100kΩ/10kΩ divider for 330V max output). |
| 4 (GND) | Power Ground | Primary return path for switch current and feedback reference; must connect directly to thermal pad and low-impedance ground plane. |
| 5 (FB) | Current-Sense Feedback | References 0.31V; connects to cathode of lowest LED + RSET; bias current ≤100nA enables high-precision current setting. |
| 6 (EN) | Enable Control | Logic-compatible input (1.5V high / 0.4V low); must not float-tie to VIN for always-on operation or drive with PWM for dimming. |
Key Features
| Feature | Design Value |
|---|---|
| High-efficiency boost topology | 84% typical efficiency at 3.6V input, 6 LEDs, 25mA - achieved via low-RDS(on) MOSFET and 1.2MHz switching minimizing core losses. |
| Integrated over-voltage protection | 30V OVP threshold with automatic shutdown - prevents SW pin overstress during LED string disconnection or failure. |
| Low-feedback reference voltage | 0.31V ±3% - reduces RSET power dissipation by 60% vs. 1.25V references, critical for battery runtime in portable devices. |
| Thermal shutdown with hysteresis | 150°C trip temperature, ~15°C hysteresis - protects against sustained overload without nuisance cycling in thermally constrained enclosures. |
| Soft-start function | Internal 1ms startup ramp - limits inrush current into output capacitor, preventing input voltage droop and system reset during power-on. |
Applications
| Cellular Phone Backlight | Digital Camera Flash/Backlight |
|---|---|
|
Use Scenario: Driving 4–6 white LEDs in series for main display backlight in GSM/UMTS smartphones with Li-ion battery supply. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED current to 15–20mA with PWM dimming via EN pin at <2kHz. Use Value: Eliminates need for individual LED current-setting resistors, reduces BOM count by 4–6 parts, and maintains consistent luminance across display lifetime. |
Use Scenario: Powering high-brightness white LED array for LCD viewfinder backlight and auxiliary flash illumination in compact digital cameras. IC Role / Device Role / Timing Role: Step-up converter delivering stable 25mA per string with OVP-enabled fault tolerance during rapid on/off flash cycles. Use Value: Supports simultaneous backlight and flash modes using same LED array; OVP prevents damage during accidental open-circuit flash trigger events. |
| MP3 Player Display | GPS Receiver UI Lighting |
|
Use Scenario: Illuminating monochrome or color TFT display in portable audio players powered by single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Efficient 1.2MHz boost regulator driving 2–4 series LEDs with DC voltage dimming via external resistor network on FB pin. Use Value: Extends battery life by >20% vs. linear drivers due to 84% efficiency; low quiescent current (500μA) preserves standby time. |
Use Scenario: Providing uniform front-panel LED indicators and map-display backlight in automotive-grade GPS navigation units. IC Role / Device Role / Timing Role: Robust LED driver with UVLO (2.3V) and thermal shutdown, operating across -40°C to +85°C ambient range. Use Value: Ensures reliable UI lighting during cold cranking (low VIN) and extended summer operation without derating or thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3606WU6-7 | Higher 1.5MHz switching frequency; 0.25V VFB; no integrated OVP - requires external OVP circuit. | Better suited for ultra-compact designs needing <15μH inductors; lacks fault protection for unattended LED arrays. | Select when board space is primary constraint and system-level OVP is already implemented. |
| AL8805W6-7 | Lower 600kHz frequency; 0.2V VFB; integrated PWM dimming input (DIM pin); no OVP pin. | Optimized for analog + PWM hybrid dimming; requires larger inductor (47μH) but offers finer brightness resolution. | Prefer for applications demanding smooth 100:1 dimming ratio with minimal external components beyond RSET. |
Compared with AP5726WUG-7, AP3606WU6-7 trades OVP safety for smaller passives, while AL8805W6-7 sacrifices switching speed for superior dimming linearity and lower VFB-making AP5726WUG-7 the balanced choice for cost-sensitive, protection-critical portable backlighting.
Availability
AP5726WUG-7 is available at Aetrix Electronics and suitable for cellular phone backlighting, digital camera displays, MP3 player UIs, and GPS receiver lighting requiring stable component supply across high-mix, low-volume production runs.
Supply support for AP5726WUG-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.
The AP5726 belongs to Diodes' LED driver product line, engineered specifically for energy-efficient, space-constrained portable backlighting where reliability, thermal performance, and protection integration are critical.
FAQ
What is the maximum number of white LEDs the AP5726WUG-7 can drive in series?
The AP5726WUG-7 is rated to drive 2–6 white LEDs in series from a 2.7–5.5V input. With typical forward voltage of 3.2V per LED, six LEDs require up to 19.2V output, which remains within the device's 30V OVP threshold and 34V absolute maximum SW pin rating when using appropriate output scaling.
Can the AP5726WUG-7 support parallel LED strings?
Yes-the AP5726WUG-7 supports single-feedback operation across multiple parallel LED strings, provided each string contains the same number of series LEDs and uses matched components. This configuration maintains current uniformity without additional sensing resistors, though total output current must remain within the IC's thermal limits.
What is the recommended inductor value and type for AP5726WUG-7?
A 22μH shielded power inductor with saturation current ≥510mA and DCR <150mΩ is recommended (e.g., Wurth 744031220). Core material must support low loss at 1.2MHz-ferrite or metal composite types are preferred over powdered iron to minimize AC losses and thermal rise.
Does the AP5726WUG-7 require an external Schottky diode, and what specifications are critical?
Yes-an external Schottky diode is mandatory. Critical specs include 40V reverse voltage rating, 100–200mA average current rating, low forward voltage (<0.4V @ 30mA), and low junction capacitance (<100pF) to minimize switching losses at 1.2MHz. Diodes like B0540WS or ZLLS400 meet these requirements per Diodes Inc.'s application notes.
AP5726WUG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 750mA (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
AP5726WUG-7 FAQ
1.How can I place an order for AP5726WUG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP5726WUG-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 AP5726WUG-7 reliable?
The price and inventory of AP5726WUG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP5726WUG-7 is usually 5 days.
3.What payment methods are accepted for AP5726WUG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP5726WUG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP5726WUG-7?
AP5726WUG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP5726WUG-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 AP5726WUG-7?
For technical support, including AP5726WUG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP5726WUG-7 requirements.
6.How does Aetrix verify that AP5726WUG-7 is sourced from the original manufacturer or authorized distributors?
All AP5726WUG-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 AP5726WUG-7 meets industry standards.
7.What is the process for return or replacement of AP5726WUG-7?
All AP5726WUG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP5726WUG-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 AP5726WUG-7 part is unused and in its original packaging.
Return procedure for AP5726WUG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP5726WUG-7 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
