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Analog Devices Inc. ADP1649ACBZ-R7
- Part No.:
- ADP1649ACBZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 12-WFBGA, WLCSP
- Datasheet:
-
ADP1649ACBZ-R7.pdf
- Description:
- IC LED DRVR RGLTR I2C 1A 12WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ADP1649ACBZ-R7 from Analog Devices is a 1.0 A I²C-programmable white LED flash driver with integrated 3 MHz synchronous boost converter, 12-ball WLCSP package (2.0 mm × 1.5 mm), ±7% LED current accuracy at 1000 mA, and dual TxMASK inputs for PA burst coordination. It serves as the primary flash current source in high-resolution smartphone camera modules, enabling low-EMI cathode-grounded LED layouts.
For engineers reviewing the ADP1649ACBZ-R7 datasheet, ADP1649ACBZ-R7 pinout, ADP1649ACBZ-R7 application, or ADP1649ACBZ-R7 equivalent, key selection criteria include programmable flash/torch current (up to 1000 mA/200 mA), 4-bit ADC for LED VF/die temperature readback, thermal/short/open-circuit protection, and 1.5/3 MHz selectable switching frequency for compact 1 µH inductor use.
Technical Context
The ADP1649ACBZ-R7 integrates a synchronous boost converter with integrated PFET/NFET switches (50 mΩ/60 mΩ) and a high-side current regulator, operating in either pass-through mode (when VIN > LED_VF + headroom) or boost mode (when VIN < LED_VF + headroom). Its I²C interface (400 kHz compliant) controls 5-bit flash current (300–1000 mA), 3-bit torch current (25–200 mA), 4-bit flash timer (up to 1600 ms), and dc battery current limit (1.35–2.2 A).
It features dual independent TxMASK inputs that reduce LED current within 21 µs during PA bursts, a 4-bit ADC supporting external voltage, die temperature, and LED forward voltage measurement, and safety mechanisms including thermal shutdown (150°C), LED short-circuit detection (1.2 V threshold), and overvoltage protection (5.5 V typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Current (Flash) | Up to 1000 mA with ±7% accuracy - enables full-brightness still-image capture under low-light conditions |
| LED Current (Torch) | Up to 200 mA with ±10% accuracy - supports continuous video assist lighting without thermal throttling |
| Switching Frequency | Configurable 1.5 MHz or 3 MHz - allows use of ultra-low-profile 1 µH inductor (1 mm height) and reduces EMI |
| I²C Interface | 400 kHz compatible with tSU,STA ≥ 0.6 µs - ensures reliable register programming in space-constrained mobile SoC environments |
| ADC Resolution | 4-bit with ±1 LSB error in VF mode - provides real-time LED forward voltage monitoring for dynamic current compensation |
| Thermal Shutdown | 150°C trip, 140°C hysteresis - protects device and PCB during sustained high-current flash operation |
| Package | 12-ball WLCSP, 0.5 mm pitch, 2.0 mm × 1.5 mm footprint - enables placement adjacent to image sensor with minimal board area |
Pinout & Package
ADP1649ACBZ-R7 uses a 12-ball, 0.5 mm pitch wafer-level chip-scale package (WLCSP) with 2.0 mm × 1.5 mm footprint and 1 mm maximum height. Thermal resistance θJA = 75°C/W on JEDEC 2s2p 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED_OUT | High-side LED current source output | Drives LED anode; supports 1000 mA flash with 265 mV headroom - enables cathode-grounded layout for improved thermal dissipation |
| SW | Boost switch node | Connects to 1 µH inductor; integrates 50 mΩ PFET and 60 mΩ NFET - eliminates need for external diode and reduces conduction loss |
| VIN | Main input supply (2.7–5.0 V) | Accepts Li-ion battery voltage; includes 2.4 V UVLO with 100 mV hysteresis - prevents operation during deep discharge |
| STROBE | Hardware flash trigger input | Synchronizes flash pulse to image sensor exposure; supports level- or edge-sensitive modes - ensures precise timing alignment |
| GPIO1 | Multifunction pin (TORCH/TxMASK1) | Enables external torch mode or reduces flash current during PA burst - provides system-level power coordination without I²C overhead |
| GPIO2 | Multifunction pin (ILED/TxMASK2/ADC) | Supports red indicator LED drive, second TxMASK input, or analog input for VF/die temp sensing - consolidates three functions into one ball |
| SDA/SCL | I²C data/clock interface | Full register access for current, timer, fault status, and ADC readback - enables closed-loop brightness control and diagnostics |
| EN | Enable input | Reduces quiescent current to <1 µA in shutdown - critical for standby power budget in always-on camera subsystems |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact WLCSP package | 2.0 mm × 1.5 mm footprint with 1 mm height - fits directly beside image sensor in slim smartphone bezels |
| Synchronous 3 MHz boost converter | No external diode required; 90% peak efficiency - minimizes heat generation and extends battery life during flash sequences |
| Dual TxMASK inputs | Sub-21 µs current reduction during PA transmit bursts - prevents battery voltage droop and maintains cellular RF performance |
| Integrated 4-bit ADC | Measures LED VF, die temperature, or external voltage - enables real-time current adjustment to compensate for LED aging and thermal drift |
| Programmable dc battery current limit | Four settings (1.35–2.2 A) - safeguards battery integrity across varying VF and temperature conditions while maximizing usable flash current |
Applications
| Smartphone Camera Flash | Digital Still Camera Assist Light |
|---|---|
|
Use Scenario: High-resolution smartphone captures low-light still images using synchronized flash pulse triggered by image sensor STROBE signal. IC Role / Device Role / Timing Role: Primary flash current source with 1000 mA capability, I²C-programmed flash duration (≤1600 ms), and hardware strobe synchronization. Use Value: Delivers consistent luminance across battery voltage range (2.7–5.0 V) via adaptive boost regulation and ±7% current accuracy. |
Use Scenario: DSLR or mirrorless camera uses continuous LED illumination during video recording to maintain scene visibility. IC Role / Device Role / Timing Role: Torch-mode current source delivering up to 200 mA with programmable ramp-up/down (0.6 ms/0.1 ms) to eliminate flicker. Use Value: Enables smooth, thermally stable assist light without requiring external current-setting resistors or discrete regulators. |
| Mobile Video Conferencing Lighting | Compact Camcorder Flash Module |
|
Use Scenario: Tablet-based video conferencing system activates front-facing LED array for user illumination during calls. IC Role / Device Role / Timing Role: Dual-mode driver operating in torch mode (200 mA) with GPIO1-triggered enable and low-VBAT foldback. Use Value: Maintains consistent brightness as battery discharges via programmable low-battery current reduction and 4-bit ADC VF monitoring. |
Use Scenario: Portable camcorder requires brief, high-intensity flash for still capture during video playback or pause. IC Role / Device Role / Timing Role: Flash driver with 1600 ms max timer, thermal overload protection, and pass-through-to-boost transition (≤530 mV dropout). Use Value: Ensures reliable single-shot flash operation without thermal shutdown, even after extended video recording sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3648YFFR | 2.0 A max flash current; 2.0 mm × 1.6 mm DSBGA; no integrated ADC; 3 MHz fixed switching | Lacks die temperature/LED VF sensing - requires external monitoring for thermal derating | Preferred when higher peak current is needed and system-level ADC is available |
| TPS61310DSKR | 1.5 A max flash current; 2.0 mm × 2.0 mm WSON; I²C interface omitted; analog current programming only | No register-based fault reporting or programmable timers - limits diagnostic capability in production test | Selected for cost-sensitive designs where firmware control depth is not required |
Compared with LM3648YFFR and TPS61310DSKR, ADP1649ACBZ-R7 uniquely integrates 4-bit ADC, dual TxMASK coordination, and programmable dc battery current limiting - enabling tighter system-level power management and autonomous thermal adaptation without host processor intervention.
Availability
ADP1649ACBZ-R7 is available at Aetrix Electronics and suitable for smartphone camera modules, digital still cameras, and portable camcorders requiring stable component supply, long-term lifecycle support, and traceable sourcing for consumer electronics production.
Supply support for ADP1649ACBZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADP1649ACBZ-R7 belongs to Analog Devices' mobile power management product line, designed specifically for space-constrained, thermally sensitive camera subsystems in smartphones and portable imaging devices.
FAQ
What is the maximum LED current supported by the ADP1649ACBZ-R7 in flash mode?
The ADP1649ACBZ-R7 supports up to 1000 mA LED current in flash mode with ±7% accuracy across temperature and input voltage ranges. This is achieved using its integrated high-side current regulator and programmable 5-bit I_FL register (00000 to 01110 binary), and is validated per Table 1 in the Rev. 0 datasheet under flash conditions (ILED = 700–1000 mA).
Does the ADP1649ACBZ-R7 support both hardware and software strobe triggering?
Yes, the ADP1649ACBZ-R7 supports both hardware and software strobe triggering. Hardware strobe uses the STROBE pin with configurable level- or edge-sensitive modes (STR_LV bit in Register 0x04); software strobe is enabled by setting STR_MODE = 0, allowing flash activation via I²C command without external signal routing. Both methods are fully documented in the "Flash Mode" section of the datasheet.
How does the ADP1649ACBZ-R7 handle thermal protection during sustained flash operation?
The ADP1649ACBZ-R7 incorporates thermal shutdown with a 150°C rising threshold and 140°C falling hysteresis (Table 4, Absolute Maximum Ratings). When junction temperature exceeds 150°C, the device disables LED output and sets a fault flag; operation resumes only after temperature falls below 140°C. This behavior is verified in thermal characterization testing and ensures reliability in compact smartphone camera modules.
Can the ADP1649ACBZ-R7 drive multiple LEDs simultaneously?
No, the ADP1649ACBZ-R7 is designed exclusively for driving a single high-power white LED. Its LED_OUT pin is a dedicated high-side current source rated for 1000 mA maximum, and the internal current sense architecture, safety thresholds (e.g., LED short-circuit detection at 1.2 V), and thermal design are optimized for one LED. Driving multiple LEDs would violate absolute maximum ratings and invalidate accuracy specifications.
What is the purpose of the GPIO2 pin on the ADP1649ACBZ-R7?
The GPIO2 pin on the ADP1649ACBZ-R7 is a multifunction terminal supporting three modes: red indicator LED current source (ILED), second TxMASK input (TxMASK2), or ADC analog input (for external voltage, die temperature, or LED VF sensing). Mode selection is controlled by IO2_CFG bits in Register 0x07, and each function is electrically isolated and validated per datasheet specifications.
ADP1649ACBZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5V
- Voltage - Output:
- 4.575V ~ 5.425V
- Current - Output / Channel:
- 1A (Flash)
- Frequency:
- 1.5MHz, 3MHz
- Dimming:
- I2C
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WLCSP (1.5x2)
ADP1649ACBZ-R7 FAQ
1.How can I place an order for ADP1649ACBZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1649ACBZ-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 ADP1649ACBZ-R7 reliable?
The price and inventory of ADP1649ACBZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1649ACBZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP1649ACBZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1649ACBZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1649ACBZ-R7?
ADP1649ACBZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1649ACBZ-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 ADP1649ACBZ-R7?
For technical support, including ADP1649ACBZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1649ACBZ-R7 requirements.
6.How does Aetrix verify that ADP1649ACBZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1649ACBZ-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 ADP1649ACBZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP1649ACBZ-R7?
All ADP1649ACBZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1649ACBZ-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 ADP1649ACBZ-R7 part is unused and in its original packaging.
Return procedure for ADP1649ACBZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP1649ACBZ-R7 Tags
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