Analog Devices Inc. ADP1653ACPZ-R7

Overview

ADP1653ACPZ-R7 from Analog Devices is a compact, high-efficiency flash/torch LED driver IC optimized for camera modules in mobile devices. It integrates a 1.2 MHz boost converter with a 2.1 A, 12 V power switch, delivers up to 500 mA flash current and 200 mA torch current, and supports dual interface selection (2-bit logic or I²C) for system-level control. Its Tx masking function reduces LED current within 22 µs during RF transmission to minimize battery stress.

For engineers reviewing the ADP1653ACPZ-R7 datasheet, ADP1653ACPZ-R7 pinout, ADP1653ACPZ-R7 application, or ADP1653ACPZ-R7 equivalent, key selection considerations include its 3 mm × 3 mm 16-lead LFCSP package, programmable flash timeout up to 820 ms, integrated safety features (thermal shutdown, overvoltage protection, short-circuit protection), and compatibility with Li-ion battery input (2.75 V to 5.5 V).

Technical Context

The ADP1653ACPZ-R7 implements a synchronous boost topology with an integrated 2.1 A NFET power switch and precision current regulation at the HPLED pin (typical 320 mV compliance voltage). Its dual-mode interface is selected via the INTF pin: high for 2-bit logic control (CTRL0/CTRL1), low for I²C (SCL/SDA) with register-based programming of flash/torch/indicator currents and fault status readback.

Core timing and protection functions include a 1.2 MHz fixed-frequency PWM controller, soft-start ramp of 18 V/ms at OUT, thermal shutdown at 155°C, and a dedicated Tx mask path that modulates SETF reference current to achieve ≤24 µs flash current foldback-critical for coexistence with cellular RF transceivers.

Key Specifications

Pinout & Package

ADP1653ACPZ-R7 is housed in a 3 mm × 3 mm, 16-lead Lead Frame Chip Scale Package (LFCSP) with exposed thermal pad (EPAD) that must be soldered to GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar flash LED driver applications.

Compared with LM3644TME/NOPB and TPS61310DSKR, the ADP1653ACPZ-R7 uniquely combines boost topology efficiency (>92%), hardware-accelerated Tx masking, and dual-interface flexibility-making it optimal for premium smartphone camera subsystems demanding RF robustness and thermal efficiency.

Availability

ADP1653ACPZ-R7 is available at Aetrix Electronics and suitable for smartphone camera modules, digital still camera illumination systems, and mobile video torch applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADP1653ACPZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.

The ADP1653ACPZ-R7 belongs to Analog Devices' camera power management product line, designed specifically to address thermal, efficiency, and RF coexistence challenges in high-resolution mobile imaging systems.

FAQ

What is the maximum flash current supported by the ADP1653ACPZ-R7?

The ADP1653ACPZ-R7 supports up to 500 mA flash current when configured with RSETF = 50 kΩ or SETF tied high in I²C mode with HPLED register = 11111 (binary). This value is confirmed in Table 1 of the Rev. C datasheet under "HPLED Regulation Current" conditions for flash mode. The device maintains this current level with ±5% regulation accuracy over temperature and input voltage variations.

Does the ADP1653ACPZ-R7 require external components for basic operation?

Yes, the ADP1653ACPZ-R7 requires four minimum external components in I²C mode: a 4.7 µF input capacitor (VDD to PGND), a 2.2 µH power inductor (LX to PGND), a Schottky diode (LX to OUT), and a 4.7 µF output capacitor (OUT to PGND). Additional resistors on SETF/SETT/SETI are optional if default internal currents suffice, per Table 6 and Pin Function Descriptions.

How does the Tx masking function work on the ADP1653ACPZ-R7?

The Tx masking function on the ADP1653ACPZ-R7 operates by externally modulating the reference current into the SETF pin using a fast logic signal (e.g., 1.8 V RF enable). This causes immediate scaling of flash LED current-measured at 22–24 µs response time-without CPU involvement. The feature is hardware-based and documented in the Applications Information section and Figure 14/15 of the datasheet.

What package type and thermal characteristics does the ADP1653ACPZ-R7 have?

The ADP1653ACPZ-R7 uses a 3 mm × 3 mm, 16-lead LFCSP package with exposed thermal pad (EPAD). Its junction-to-ambient thermal resistance (θJA) is 44°C/W on a 4-layer board with EPAD soldered to GND, and it incorporates thermal shutdown at 155°C. These values are specified in the Absolute Maximum Ratings and Thermal Resistance sections of the Rev. C datasheet.

Can the ADP1653ACPZ-R7 drive more than two white LEDs?

Yes, the ADP1653ACPZ-R7 can drive up to three high-power white LEDs in series, as stated in the Theory of Operation section (Page 13). Its boost converter supports output voltages up to 10.15 V (OVP threshold), sufficient for three typical 3.2 V forward-voltage LEDs (≈9.6 V total). Performance data in Figures 12–13 confirms operation with one or two LEDs; three-LED operation follows same regulation principles with appropriate external component selection.