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Analog Devices Inc. ADP5501ACPZ-RL
- Part No.:
- ADP5501ACPZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADP5501ACPZ-RL.pdf
- Description:
- IC LED DRVR WHITE BCKLGT 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:162
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Product details
Overview
ADP5501ACPZ-RL from Analog Devices is a programmable white LED backlight driver IC with integrated ambient light sensing, 128-level backlight current control (up to 30 mA), I²C interface, and autonomous fade/dim/off timing logic. It drives up to six series-connected white LEDs via an asynchronous boost converter and supports three auxiliary LED sinks for status indicators in portable media devices.
For engineers reviewing the ADP5501ACPZ-RL datasheet, ADP5501ACPZ-RL pinout, ADP5501ACPZ-RL application, or ADP5501ACPZ-RL equivalent, key selection considerations include its 24-lead LFCSP package, 2.7 V–5.5 V input range, 30 mA backlight sink capability, ambient light–adaptive brightness control, and autonomous timer-based backlight sequencing without host processor intervention.
Technical Context
The ADP5501ACPZ-RL integrates a nonsynchronous boost converter (OVP = 24.5 V min) with a programmable 30 mA current sink (BL_SNK) for main display backlighting and three independent 14 mA auxiliary LED sinks (LED0/LED1/LED2). Its ambient light sensing path accepts photodiode current at CMP_IN and enables automatic backlight level switching across daylight, office, and dark operating modes.
Control is implemented via an I²C-compatible interface (400 kHz max) with register-mapped timers for fade-in/fade-out (0.3–5.5 s), dim delay (10 s–2 min), and off delay (10 s–2 min); all operate autonomously after configuration. The device includes thermal shutdown (150°C), overvoltage protection, current limit (600 mA peak), and undervoltage lockout on both VBAT and VDDIO rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V on VBAT - powers boost stage and internal circuitry; supports single-cell Li-ion and dual-cell alkaline systems. |
| Backlight Current Range | 0–30 mA (128 programmable levels) - precise brightness control for up to 6-series white LEDs with linear or square-law mapping. |
| Ambient Light Input | CMP_IN accepts 0.7–1.2 mA full-scale photodiode current - enables closed-loop adaptive backlight adjustment without host CPU polling. |
| I²C Interface Speed | Up to 400 kHz - compatible with standard-mode I²C controllers; supports register read/write for full configuration and status monitoring. |
| Thermal Protection | 150°C shutdown with 10°C hysteresis - prevents damage during sustained high-current operation in compact handheld enclosures. |
| Package | 4.0 mm × 4.0 mm, 24-lead LFCSP - low-profile, thermally enhanced surface-mount package with exposed pad for PCB heat dissipation. |
| Standby Current | 25–45 μA (VDDIO = 1.8–3.3 V) - ultra-low quiescent power enables long battery life during display-off states. |
Pinout & Package
ADP5501ACPZ-RL is housed in a 4.0 mm × 4.0 mm, 24-lead Lead Frame Chip Scale Package (LFCSP_VQ) with exposed thermal pad (EPAD) requiring connection to GND for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power ground return for switch node | Low-inductance path for boost converter high-current switching loop; must be connected to solid ground plane. |
| 2 SW | Switch node output | Connects to boost inductor; carries pulsed high-current switching waveform; requires tight layout to minimize EMI. |
| 3 INT | Open-drain interrupt output | Signals ambient light threshold crossing, thermal fault, overvoltage, or current limit event; requires external pull-up to VDDIO. |
| 4 SDA | I²C data line | Open-drain bidirectional serial data; requires external pull-up to VDDIO; supports standard-mode I²C communication. |
| 5 SCL | I²C clock line | Open-drain input-only clock; requires external pull-up to VDDIO; synchronizes register access and status reads. |
| 14–16 LED0/LED1/LED2 | Auxiliary LED current sinks | Three independent 14 mA max sinks for RGB or monochrome status indicators; support programmable fade and blink timing. |
| 17 CMP_IN | Ambient light sensor input | Current-input comparator node for photodiode; enables automatic backlight level selection across three preset lighting conditions. |
| 21 VBAT | Main power supply input | Primary 2.7–5.5 V rail powering boost converter, LDO, and analog blocks; includes UVLO (2.4–2.7 V rising). |
| 23 BL_SNK | Main backlight current sink | High-accuracy 30 mA sink for display backlight string; current set by register-controlled DAC and fade logic. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous backlight sequencing | Configurable fade-in/fade-out (0.3–5.5 s), dim delay (10 s–2 min), and off delay (10 s–2 min) execute without host CPU involvement - extends battery life in always-on UI scenarios. |
| Adaptive ambient light response | Three operating levels (daylight, office, dark) with independent max/dim current registers - maintains optimal visibility while minimizing power under varying illumination. |
| Multi-algorithm backlight ramping | Linear, square, cubic-1, and cubic-2 fade laws - matches human visual perception (Weber-Fechner law) for natural-feeling brightness transitions. |
| Integrated boost + current sink architecture | Single-chip solution eliminates discrete boost controller, MOSFET, diode, and current-sink IC - reduces BOM count and PCB area in space-constrained handsets. |
| Robust system protection | Thermal shutdown (150°C), overvoltage protection (24.5 V min), current limit (600 mA peak), and UVLO on both VBAT and VDDIO - ensures reliable operation across voltage and temperature extremes. |
Applications
| Smartphone Display Backlight Control | Portable Media Player UI Indicators |
|---|---|
Use Scenario: Dynamic backlight adjustment in cellular handsets based on ambient light and user interaction patterns. IC Role / Device Role / Timing Role: Primary backlight driver with autonomous fade/dim/off timers and ambient light–triggered level switching between daylight, office, and dark modes. Use Value: Extends battery runtime by eliminating continuous host CPU polling and enabling precise, perceptually optimized brightness transitions. |
Use Scenario: Status indication for playback, charging, and connectivity in battery-powered audio/video players. IC Role / Device Role / Timing Role: Triple auxiliary LED sink (LED0/LED1/LED2) with independent fade-in/fade-out and blink timing control. Use Value: Enables rich visual feedback (e.g., breathing RGB effects) using only one IC, reducing component count and firmware complexity. |
| Automotive Infotainment Display | Industrial Handheld Terminal UI |
Use Scenario: Sunlight-readable display backlight management in vehicle dashboards and center consoles. IC Role / Device Role / Timing Role: High-efficiency boost driver (up to 30 mA) with wide 2.7–5.5 V input range tolerating automotive battery transients. Use Value: Maintains consistent display luminance across extreme ambient conditions (0–100,000 lux) while surviving cold-crank and load-dump events. |
Use Scenario: Ruggedized field device with sealed enclosure requiring low-power, maintenance-free UI lighting. IC Role / Device Role / Timing Role: Standby current of 25–45 μA and thermal shutdown (150°C) ensure reliable multi-year operation in unventilated enclosures. Use Value: Eliminates need for external watchdog or thermal monitoring circuits - simplifies certification and reduces failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530TMX/NOPB | 4-channel I²C LED driver (max 25 mA per channel); no ambient light input; requires external photodiode amplifier. | Lacks autonomous ambient light adaptation and integrated boost - needs additional components for full closed-loop control. | Choose when cost-sensitive designs prioritize channel count over ambient sensing integration and can accommodate external signal conditioning. |
| MAX1698EUT+T | Boost LED driver with 35 mA sink; analog dimming only; no I²C interface or programmable timers. | No digital control, no fade logic, no ambient sensing - limited to fixed-brightness or externally PWM-dimmed applications. | Choose for simple, low-pin-count implementations where host MCU handles all timing and light sensing via GPIO/PWM. |
Compared with LM3530TMX/NOPB and MAX1698EUT+T, ADP5501ACPZ-RL uniquely combines ambient light–adaptive backlight control, autonomous fade/dim/off sequencing, and integrated boost in a single 24-lead LFCSP - reducing total system component count and firmware overhead for portable media devices.
Availability
ADP5501ACPZ-RL is available at Aetrix Electronics and suitable for smartphone display backlighting, portable media player UI indicators, automotive infotainment displays, and industrial handheld terminal UIs requiring stable component supply and long-term production continuity.
Supply support for ADP5501ACPZ-RL 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets with precision power, sensing, and interface solutions.
The ADP5501ACPZ-RL belongs to Analog Devices' portable power management product line, designed specifically for energy-efficient, feature-rich backlight and indicator control in media-enabled handheld devices with stringent size and battery-life constraints.
FAQ
What is the maximum number of white LEDs the ADP5501ACPZ-RL can drive in series?
The ADP5501ACPZ-RL is specified to drive up to six white LEDs in series using its integrated asynchronous boost converter, which provides up to 24.5 V minimum overvoltage protection - sufficient for typical white LED forward voltages (3.0–3.6 V each) at full current. This capability is confirmed in the General Description, Typical Operating Circuit, and Boost Startup Time specification on Page 3 of the Rev. 0 datasheet.
Does the ADP5501ACPZ-RL require an external photodiode for ambient light sensing?
Yes, the ADP5501ACPZ-RL requires an external photodiode connected to the CMP_IN pin to perform ambient light sensing. The device provides a current-input comparator stage but does not integrate the photodiode itself; the photodiode's output current (0.7–1.2 mA full-scale) is directly applied to CMP_IN to trigger automatic backlight level changes between daylight, office, and dark modes.
Can the ADP5501ACPZ-RL operate without I²C communication after initial setup?
Yes, the ADP5501ACPZ-RL supports fully autonomous operation after I²C configuration. Once registers are programmed for backlight levels, fade times, dim/off delays, and ambient light thresholds, the internal state machine executes all timing, fading, and level-switching functions independently - allowing the host processor to enter low-power sleep modes and significantly reduce system power consumption.
What protection features are built into the ADP5501ACPZ-RL?
The ADP5501ACPZ-RL includes thermal shutdown (150°C with 10°C hysteresis), overvoltage protection (24.5 V minimum on BST), peak current limiting (600 mA typical), undervoltage lockout on both VBAT (2.4–2.7 V rising) and VDDIO (1.4 V rising), and open-drain interrupt signaling for fault conditions - ensuring robust operation in thermally constrained portable environments.
Is the ADP5501ACPZ-RL pin-compatible with other members of the ADP55xx family?
No, the ADP5501ACPZ-RL is not pin-compatible with other ADP55xx devices such as the ADP5520 or ADP5587. Its 24-lead LFCSP pinout - including dedicated BL_SNK, CMP_IN, and triple auxiliary LED sinks - is unique to this part. Pin compatibility is not claimed in the datasheet, and substitution would require PCB redesign due to differing pin assignments and functional allocation.
ADP5501ACPZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad, CSP
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LFCSP-VQ (4x4)
ADP5501ACPZ-RL FAQ
1.How can I place an order for ADP5501ACPZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP5501ACPZ-RL 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 ADP5501ACPZ-RL reliable?
The price and inventory of ADP5501ACPZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP5501ACPZ-RL is usually 5 days.
3.What payment methods are accepted for ADP5501ACPZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP5501ACPZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP5501ACPZ-RL?
ADP5501ACPZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP5501ACPZ-RL 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 ADP5501ACPZ-RL?
For technical support, including ADP5501ACPZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP5501ACPZ-RL requirements.
6.How does Aetrix verify that ADP5501ACPZ-RL is sourced from the original manufacturer or authorized distributors?
All ADP5501ACPZ-RL 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 ADP5501ACPZ-RL meets industry standards.
7.What is the process for return or replacement of ADP5501ACPZ-RL?
All ADP5501ACPZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADP5501ACPZ-RL, 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 ADP5501ACPZ-RL part is unused and in its original packaging.
Return procedure for ADP5501ACPZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP5501ACPZ-RL Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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