My Inquiry
My Account
Analog Devices Inc. ADP5520ACPZ-R7
- Part No.:
- ADP5520ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADP5520ACPZ-R7.pdf
- Description:
- IC LED DRV RGLTR I2C 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,819
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADP5520ACPZ-R7 from Analog Devices is a single-chip white LED backlight driver with integrated 8-pin I/O expander, asynchronous boost converter (24.5 V OVP), ambient light sensing input (CMP_IN), and three auxiliary LED current sinks (ILED, R3, C3). It delivers up to 30 mA backlight current across 128 programmable levels and supports autonomous fade-in/fade-out, dim/off timers, and keypad matrix scanning for flip/slide phone displays.
For engineers reviewing the ADP5520ACPZ-R7 datasheet, ADP5520ACPZ-R7 pinout, ADP5520ACPZ-R7 application, or ADP5520ACPZ-R7 equivalent, key selection considerations include its 24-lead LFCSP package, I²C interface with INT/RST lines, dual-mode backlight control (manual/ambient-adaptive), GPIO-keypad-auxLED multimode pin assignment, and thermal shutdown at 150°C.
Technical Context
The ADP5520ACPZ-R7 integrates an asynchronous boost converter driving up to six series-connected white LEDs via BL_SNK, with programmable peak inductor current limit (450–750 mA) and switch on-resistance (100–400 mΩ). Its internal state machine executes autonomous backlight sequencing-fade-in (0.3–5.5 s), fade-out (0.3–5.5 s), dim timer (10 s–2 min), and off timer (10 s–2 min)-without host processor intervention.
It features an ambient light sensor interface (CMP_IN) enabling automatic brightness adjustment across daylight/office/dark operating levels, plus eight configurable I/O pins supporting keypad matrix (4×4), digital input/output, or auxiliary LED sinking (up to 14 mA per sink), all managed through a register-mapped I²C interface with interrupt signaling (INT) and hardware reset (RST).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | VBAT = 2.7 V to 5.5 V; powers boost stage and core logic; VDDIO = 1.7 V to 3.3 V (or VBAT, whichever smaller) powers I/O rails. |
| Backlight Current Sink | BL_SNK delivers 26–32 mA full-scale (typ. 30 mA) with 128-step linear/square-law programmability for precise brightness control. |
| Auxiliary LED Sinks | ILED, R3, C3 each sink 10.5–16.5 mA (typ. 14 mA); enables independent blinking/fading of up to 3 indicator LEDs. |
| Boost Output Voltage Limit | OVP threshold = 24.5–29.5 V (typ. 27 V); protects LED string and IC from overvoltage during transient or open-circuit conditions. |
| I²C Interface | Standard-mode (400 kHz max); supports register read/write, interrupt-driven status reporting, and configuration persistence without host polling. |
| Thermal Protection | Thermal shutdown triggers at TJ = 150°C ± 0°C with 10°C hysteresis; prevents damage during sustained high-power operation or poor PCB thermal design. |
| Ambient Light Sensing | CMP_IN accepts photodiode current; enables closed-loop backlight adaptation across lighting environments without external ADC or firmware logic. |
Pinout & Package
ADP5520ACPZ-R7 is housed in a 4.0 mm × 4.0 mm, 24-lead Lead Frame Chip Scale Package (LFCSP) with exposed pad (EPAD) requiring connection to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Switch Ground Return | Low-inductance path for boost switch current; must be connected directly to power ground plane. |
| 3 INT | Open-Drain Interrupt Output | Active-low signal alerts host MCU of keypad events, ambient threshold crossings, or fault conditions; requires external pull-up to VDDIO. |
| 4 SDA | I²C Data Line | Open-drain bidirectional data line; requires external pull-up to VDDIO; supports standard-mode I²C communication. |
| 5 SCL | I²C Clock Line | Open-drain clock input; requires external pull-up to VDDIO; synchronizes register access and status reads. |
| 14 ILED | Dedicated Auxiliary LED Sink | Current sink output (max 14 mA); used for primary indicator LED; configured independently of GPIO modes. |
| 15 RST | Active-Low Hardware Reset | Asynchronous reset input; low pulse ≥75 µs forces power-up default register state and clears internal state machine. |
| 16 VDDIO | I/O Supply Rail | Separate 1.7–3.3 V supply for GPIO logic levels; decouples I/O voltage from VBAT; enables mixed-voltage system interfacing. |
| 17 CMP_IN | Ambient Light Sensor Input | Analog current input for photodiode; enables automatic backlight adjustment without external signal conditioning. |
| 21 VBAT | Main Power Input | Primary supply for boost converter and internal LDO; accepts 2.7–5.5 V battery or rail; includes UVLO (2.4–2.7 V rising). |
| 22 BST | Boost Converter OVP Monitor | Feedback node for overvoltage protection circuitry; monitors BST capacitor voltage to enforce 24.5–29.5 V clamp. |
| 23 BL_SNK | Backlight LED Current Sink | High-side current sink output (max 30 mA); drives cathodes of series-connected white LEDs; PWM-free analog dimming. |
| EPAD | Exposed Thermal Pad | Must be soldered to solid GND plane; provides primary thermal path (θJA = 50°C/W) and reduces junction temperature rise. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Backlight Sequencing | On-chip state machine executes fade-in/fade-out, dim/off timers, and level transitions without CPU involvement-reducing host processing load and extending battery life. |
| Triple-Mode I/O Configuration | Eight pins (R0–R3, C0–C3) support keypad matrix (4×4), general-purpose digital I/O, or auxiliary LED sinking-enabling flexible hardware reuse in space-constrained handset designs. |
| Ambient Light Adaptive Control | CMP_IN input + internal comparator enables real-time backlight adjustment across daylight/office/dark profiles-improving user experience while minimizing power draw in low-light conditions. |
| Integrated Boost Converter | Asynchronous topology with 450–750 mA peak current limit and 100–400 mΩ switch RDS(ON) delivers >85% efficiency at 30 mA/6-LED load-eliminating need for external boost IC and reducing BOM count. |
| Robust System Integration | Includes thermal shutdown (150°C), overvoltage protection (27 V typ), undervoltage lockout (2.4–2.7 V), and ESD protection-ensuring reliable operation in portable consumer electronics environments. |
Applications
| Smartphone Flip/Slider Display Backlight | Keypad Matrix Interface for Mobile Handsets |
|---|---|
Use Scenario: Backlighting LCD display in flip or slider phones where mechanical hinge limits routing of signals from baseband processor to display section. IC Role / Device Role / Timing Role: ADP5520ACPZ-R7 acts as autonomous backlight controller and I/O bridge-receiving I²C commands across hinge, generating local boost voltage, sinking LED current, and managing fade timing. Use Value: Reduces inter-hinge signal count by consolidating backlight drive, keypad scan, and LED indication into one IC-lowering flex cable cost and improving mechanical reliability. | Use Scenario: Scanning 4×4 keypad matrix in compact mobile devices with minimal GPIO availability on baseband processor. IC Role / Device Role / Timing Role: ADP5520ACPZ-R7 configures R0–R3 and C0–C3 as row/column drivers, performs debounced key detection, and reports press/release events via INT line. Use Value: Offloads keypad scanning and debounce logic from host MCU-freeing CPU cycles and eliminating need for external scan controller or RC timing networks. |
| Ambient-Adaptive Indicator Lighting | Multi-LED Status Indication System |
Use Scenario: Dynamic brightness control of front-panel LEDs based on ambient illumination (e.g., dark room vs. sunlight). IC Role / Device Role / Timing Role: ADP5520ACPZ-R7 uses CMP_IN photodiode input to select between daylight/office/dark backlight levels and adjusts BL_SNK current accordingly. Use Value: Extends battery runtime by reducing LED current in low-light conditions while maintaining visibility-no software algorithm or external light sensor required. | Use Scenario: Driving three independent status LEDs (power, charging, notification) with synchronized fade effects in portable electronics. IC Role / Device Role / Timing Role: ADP5520ACPZ-R7 assigns ILED, R3, and C3 as auxiliary sinks, programs individual fade-in/fade-out times (0.3–5.5 s), and controls blink on/off durations. Use Value: Enables rich visual feedback using hardware-timed LED effects-avoiding MCU-based PWM generation and ensuring consistent timing across power states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar backlight driver with I/O expander applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8649ETE+T | Single-output WLED driver (no I/O expander); 30 V OVP; 32-step current control; no ambient light sensing or fade timers. | Limited to basic backlight drive only; cannot replace keypad scanning or auxiliary LED functions of ADP5520ACPZ-R7. | Select when only LED driving is needed and system already implements separate I/O expansion or light sensing. |
| TPS61165DRVR | WLED driver with I²C interface and 1.5 A switch; no integrated GPIO, keypad, or ambient sensing; supports up to 5 LEDs in series. | Requires external microcontroller for keypad management and light adaptation logic; lacks autonomous fade/dim/off sequencing. | Choose for higher-current LED strings (>30 mA) where I/O expansion is handled elsewhere and firmware manages timing. |
Compared with MAX8649ETE+T and TPS61165DRVR, ADP5520ACPZ-R7 uniquely integrates backlight drive, keypad scanning, ambient light adaptation, and multi-LED fading in one die-reducing component count and enabling true autonomous operation in hinge-based mobile architectures.
Availability
ADP5520ACPZ-R7 is available at Aetrix Electronics and suitable for smartphone flip/slide display backlighting, keypad matrix scanning, ambient-adaptive indicator lighting, and multi-LED status indication requiring stable component supply and long-term production continuity.
Supply support for ADP5520ACPZ-R7 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 is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and power management.
The ADP5520ACPZ-R7 belongs to Analog Devices' portable power and interface IC product line, designed specifically for space-constrained mobile handsets requiring integrated backlight control, I/O expansion, and ambient-aware user interface functionality.
FAQ
What is the maximum number of white LEDs the ADP5520ACPZ-R7 can drive?
The ADP5520ACPZ-R7 can drive up to six white LEDs connected in series using its asynchronous boost converter and BL_SNK current sink. Its 24.5 V minimum overvoltage protection threshold ensures sufficient headroom for typical white LED forward voltages (3.0–3.6 V per LED), supporting configurations up to 6 × 3.6 V = 21.6 V total string voltage.
Does the ADP5520ACPZ-R7 support automatic ambient light adjustment without external components?
Yes, the ADP5520ACPZ-R7 supports automatic ambient light adjustment using its dedicated CMP_IN pin, which accepts current from a standard photodiode. No external ADC, op amp, or firmware algorithm is required-the device internally compares light level against thresholds and selects daylight/office/dark backlight operating levels autonomously.
Can the ADP5520ACPZ-R7 operate as both a keypad scanner and auxiliary LED driver simultaneously?
Yes, the ADP5520ACPZ-R7 can operate as both a keypad scanner and auxiliary LED driver simultaneously. Pins R3 and C3 are multiplexed: they function as row/column inputs in keypad mode but can be reconfigured as current sinks (up to 14 mA each) for auxiliary LEDs-while ILED remains dedicated-enabling concurrent keypad detection and LED indication.
What is the purpose of the VDDIO pin on the ADP5520ACPZ-R7?
The VDDIO pin on the ADP5520ACPZ-R7 supplies power to the I/O logic block, setting voltage levels for SDA, SCL, RST, and all GPIO pins (R0–R3, C0–C3). It accepts 1.7 V to 3.3 V (or VBAT, whichever is smaller), enabling interoperability with lower-voltage processors and isolating I/O signaling from main power rail noise.
How does the ADP5520ACPZ-R7 achieve fade-in and fade-out without PWM?
The ADP5520ACPZ-R7 achieves fade-in and fade-out using analog current ramping through its internal BL_SNK current sink. The BL_FI and BL_FO registers program linear ramp rates (0.3–5.5 s for 0–30 mA transition), generating smooth brightness changes without PWM switching artifacts or EMI concerns-ideal for human-facing indicators.
ADP5520ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- 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:
- 27V
- Current - Output / Channel:
- 14mA, 30mA
- Frequency:
- -
- Dimming:
- I2C
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LFCSP-VQ (4x4)
ADP5520ACPZ-R7 FAQ
1.How can I place an order for ADP5520ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP5520ACPZ-R7 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 ADP5520ACPZ-R7 reliable?
The price and inventory of ADP5520ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP5520ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP5520ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP5520ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP5520ACPZ-R7?
ADP5520ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP5520ACPZ-R7 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 ADP5520ACPZ-R7?
For technical support, including ADP5520ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP5520ACPZ-R7 requirements.
6.How does Aetrix verify that ADP5520ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP5520ACPZ-R7 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 ADP5520ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP5520ACPZ-R7?
All ADP5520ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP5520ACPZ-R7, 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 ADP5520ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP5520ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP5520ACPZ-R7 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
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
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…
