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Diodes Incorporated AP3154AFG-7
- Part No.:
- AP3154AFG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 12-UFDFN Exposed Pad
- Datasheet:
-
AP3154AFG-7.pdf
- Description:
- IC LED DRVR RGLTR DIM 30MA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,377
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Product details
Overview
AP3154AFG-7 from Diodes Incorporated is a 120mA high-efficiency charge-pump white LED driver IC with 1x/1.5x/2x operating modes, 2.7V–5.5V input range, and 1-wire SDI/PWM dimming control. It drives up to four independent LED channels (30mA max per channel), features spread-spectrum EMI reduction, soft-start/soft-stop, and integrated short-circuit, over-voltage, under-voltage, and thermal protection. Used in mobile phone backlighting and camera flash modules.
For engineers reviewing the AP3154AFG-7 datasheet, AP3154AFG-7 pinout, AP3154AFG-7 application, or AP3154AFG-7 equivalent, this page delivers verified electrical parameters, DFN3030-12 package mapping, SDI protocol timing constraints, current-level resolution (16-step logarithmic dimming), and real-world trade-offs between switching frequency (0.6/1.2/1.8 MHz) and efficiency vs. ripple.
Technical Context
The AP3154AFG-7 implements an adaptive charge-pump architecture that automatically selects 1x, 1.5x, or 2x voltage multiplication based on VIN and LED forward voltage requirements. Its digital control block decodes SDI commands (1–63 falling edges) to configure per-channel current levels, switching frequency, spread-spectrum enable, and low-current mode (2mA scale).
Each of the four current-sink outputs (D1–D4) delivers programmable constant current with ±10% accuracy and ≤5% matching across channels at 20mA. The internal oscillator supports three fixed frequencies (0.6/1.2/1.8 MHz), and spread-spectrum modulation adds ±10% frequency deviation to reduce EMI peak energy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 120mA total across 4 channels (30mA per channel maximum) |
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion and dual-cell alkaline power rails |
| Charge-Pump Modes | 1x (bypass), 1.5x (voltage boost), 2x (doubling) - selected automatically for optimal efficiency |
| Dimming Interface | 1-wire SDI (up to 10MHz) or PWM on SDI pin - enables firmware-controlled brightness without extra GPIOs |
| Current Accuracy | ±10% per channel - ensures consistent LED luminance across displays and flash arrays |
| Shutdown Current | <6µA - minimizes battery drain in standby mode for portable devices |
| Switching Frequency | 0.6 / 1.2 / 1.8 MHz - selectable via SDI; higher frequencies allow smaller external capacitors |
| Efficiency | Up to 88% - achieved by minimizing conduction losses and optimizing charge-transfer timing |
Pinout & Package
AP3154AFG-7 uses the DFN3030-12 (3.0mm × 3.0mm, 0.5mm pitch) lead-free, green molding compound package with exposed thermal pad. The 12-pin top-side layout includes dual flying capacitor terminals, four current-sink outputs, VOUT, VIN, GND, SDI, and dedicated ground pin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D4 | Current Sink #4 Output | Drives fourth LED string; connect to VOUT if unused to disable sink |
| SDI | Serial Digital Interface / PWM Input | Single-wire bidirectional control: accepts falling-edge command sequences or PWM duty-cycle signals |
| C1P / C1N | Flying Capacitor Terminal Pair #1 | Forms first charge-pump stage; requires 1µF ceramic capacitor between C1P and C1N |
| VOUT | Charge-Pump Output Voltage Rail | Supplies regulated boosted voltage to all LED anodes; bypassed with 1µF to GND |
| C2P / C2N | Flying Capacitor Terminal Pair #2 | Forms second charge-pump stage; requires 1µF ceramic capacitor between C2P and C2N |
| VIN | Main Power Input | Accepts 2.7–5.5V supply; bypassed with 1µF ceramic capacitor to GND |
| GND | Signal Ground Reference | Primary return path for control logic and analog blocks; connects to EP pad |
| D1–D3 | Current Sinks #1–#3 | Drive first three LED strings independently; each configurable to 2/14/20/30mA max scale |
| EP Pad | Exposed Thermal Pad | Must be soldered to PCB ground plane for thermal dissipation (θJA = 160°C/W) |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Charge-Pump Mode Selection | Automatically chooses 1x/1.5x/2x based on VIN and LED VF - eliminates manual mode configuration |
| 16-Step Logarithmic Dimming | Per-channel brightness control with ~1dB step resolution - matches human eye perception linearly |
| Spread-Spectrum Clock Modulation | ±10% frequency deviation around nominal clock - reduces EMI peaks without adding filtering components |
| Soft-Start / Soft-Stop | 1ms controlled ramp-up/down of output current - prevents inrush spikes during power-on and shutdown |
| Integrated Protection Suite | Short-circuit, over-voltage, under-voltage lockout, and thermal shutdown - no external fault-handling circuitry needed |
| Low-Current Mode (2mA Scale) | Enables ultra-low-power operation for transmissive LCD panels or standby indicators |
Applications
| Mobile Phone Backlighting | Camera Flash LED Driver |
|---|---|
|
Use Scenario: Driving 4-white-LED array behind TFT-LCD display in smartphones with dynamic brightness scaling. IC Role / Device Role / Timing Role: Constant-current charge-pump LED driver with automatic mode selection and SDI-based per-frame dimming updates. Use Value: Achieves >85% efficiency at 3.7V input while maintaining <5% current mismatch across LEDs for uniform luminance. |
Use Scenario: High-brightness strobe lighting for smartphone cameras requiring fast turn-on and precise intensity control. IC Role / Device Role / Timing Role: Four-channel current sink delivering synchronized 30mA pulses to parallel LED strings with soft-start limiting surge current. Use Value: Enables 100% duty-cycle flash bursts with <1ms turn-on delay and built-in short-circuit protection during LED wire-bond failure. |
| PDA Display Illumination | Portable LCD Module Backlight |
|
Use Scenario: Powering monochrome or color STN/TFT backlights in handheld PDAs with battery-life-sensitive operation. IC Role / Device Role / Timing Role: Low-quiescent-current (1.2mA active, <6µA shutdown) LED driver supporting 2mA low-current mode for dim standby states. Use Value: Extends battery runtime by 30% versus fixed-frequency drivers through adaptive 1.2MHz switching and spread-spectrum noise reduction. |
Use Scenario: Compact backlight solution for industrial or medical LCD modules where board space and EMI are constrained. IC Role / Device Role / Timing Role: Single-chip charge-pump solution eliminating inductors; uses only four 1µF ceramic caps for full functionality. Use Value: Reduces BOM count by 7 components versus inductive boost drivers while meeting CISPR-22 Class B radiated emissions limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3156AFG-7 | Same pinout and SDI interface, but supports 150mA total output (37.5mA/channel) and wider 2.5–6.0V input range | Better suited for high-brightness flash applications requiring >120mA burst current | Select when higher peak current or extended input voltage margin is required; otherwise AP3154AFG-7 offers lower cost and identical feature set |
| AL8862SP-7 | Inductive boost topology (not charge-pump); requires external inductor; 1.2MHz fixed switching; analog/PWM dimming only | Higher efficiency (>90%) above 4.5V input but larger solution size and EMI sensitivity | Choose for systems prioritizing peak efficiency over board area and component count; not drop-in compatible due to topology and pinout differences |
Compared with AP3156AFG-7, the AP3154AFG-7 trades 30mA output headroom for tighter input voltage tolerance and lower system cost; versus AL8862SP-7, it eliminates inductor-related design complexity and EMI filtering but sacrifices efficiency at higher VIN.
Availability
AP3154AFG-7 is available at Aetrix Electronics and suitable for mobile phone backlighting, camera flash LED lighting, and portable LCD module applications requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for AP3154AFG-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 ICs, specializing in power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP3154A belongs to Diodes' white LED driver product line, designed specifically for compact, high-efficiency backlighting and flash applications in battery-powered portable electronics.
FAQ
What is the minimum external component count required for AP3154AFG-7 operation?
The AP3154AFG-7 requires only four 1µF ceramic capacitors: one each for input (CIN), output (COUT), and two flying capacitors (C1, C2). No inductors, resistors, or external feedback networks are needed. This minimal BOM enables ultra-compact PCB layouts ideal for space-constrained mobile designs.
How does the AP3154AFG-7 handle unused current-sink channels?
Unused current-sink pins (D1–D4) must be connected directly to VOUT to disable them. This configuration forces the internal sink transistor into cutoff, preventing leakage current and ensuring zero output. Leaving pins floating or grounded will cause malfunction or damage due to uncontrolled current paths.
Can AP3154AFG-7 operate in PWM dimming mode without prior SDI configuration?
No. The AP3154AFG-7 must first be placed into PWM mode using SDI command 63 (63 falling edges), after which the SDI pin accepts PWM signals. All configuration - including maximum current scale (2/14/20/30mA) and channel enablement - must be completed in SDI mode before enabling PWM dimming.
What thermal derating applies when using AP3154AFG-7 at 120mA output in DFN3030-12 package?
With θJA = 160°C/W and maximum junction temperature of 150°C, continuous 120mA operation at 5.5V input requires ≤25°C ambient temperature unless the EP pad is fully soldered to a ≥1cm² copper pour. At 85°C ambient, maximum sustainable output current drops to ~75mA without additional heatsinking or airflow.
AP3154AFG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 12-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 30mA
- Frequency:
- 600kHz, 1.2MHz, 1.8MHz
- Dimming:
- PWM
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN3030-12
AP3154AFG-7 FAQ
1.How can I place an order for AP3154AFG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3154AFG-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 AP3154AFG-7 reliable?
The price and inventory of AP3154AFG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3154AFG-7 is usually 5 days.
3.What payment methods are accepted for AP3154AFG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3154AFG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3154AFG-7?
AP3154AFG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3154AFG-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 AP3154AFG-7?
For technical support, including AP3154AFG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3154AFG-7 requirements.
6.How does Aetrix verify that AP3154AFG-7 is sourced from the original manufacturer or authorized distributors?
All AP3154AFG-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 AP3154AFG-7 meets industry standards.
7.What is the process for return or replacement of AP3154AFG-7?
All AP3154AFG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP3154AFG-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 AP3154AFG-7 part is unused and in its original packaging.
Return procedure for AP3154AFG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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