Renesas UPD168111AMA-6A5-E2-A

Overview

UPD168111AMA-6A5-E2-A from Renesas Electronics is a monolithic 2-channel H-bridge microstep driver IC for digital still camera lens actuation, featuring 64-step microstepping, two-phase excitation mode, serial 16-bit configuration interface (LSB-first), and P-channel high-side MOSFETs eliminating charge-pump circuitry. It operates from a 2.7–3.6 V logic supply and supports motor power up to 15 V.

For engineers reviewing the UPD168111AMA-6A5-E2-A datasheet, UPD168111AMA-6A5-E2-A pinout, UPD168111AMA-6A5-E2-A application, or UPD168111AMA-6A5-E2-A equivalent, key selection considerations include its 24-pin TSSOP package, 6 MHz max serial clock frequency, undervoltage lockout at 1.7 V, Hi-Z output disable via EN/RESETB, and dual-channel current feedback architecture optimized for low-noise lens positioning.

Technical Context

The UPD168111AMA-6A5-E2-A integrates a CMOS control block and MOS output stage with independent current-sense resistors per channel (FB1/FB2), enabling closed-loop 64-step microstepping via internal D/A + PWM synthesis of dummy sine waves. Its oscillator uses external capacitor (COSC) or crystal (OSCIN) input for timing generation.

It implements a dual-mode excitation controller: selectable microstep (64 steps/rev) or two-phase full-step mode, with acceleration/deceleration parameters programmable via serial register addresses 0–5. Motor position monitoring is supported through MOB phase-detection output and EXT0/EXT1 logic monitor pins.

Key Specifications

Pinout & Package

UPD168111AMA-6A5-E2-A is housed in a 24-pin plastic TSSOP (5.72 mm body width, 0.65 mm pitch), with exposed thermal pad not electrically connected. Pin 1 is top-left corner (LATCH), pin 24 is top-right (OSCIN), and pin 13 (RESETB) is center-top.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6600HG and LV8731V, the UPD168111AMA-6A5-E2-A uniquely combines dual-channel 64-step microstepping, on-chip sine-wave synthesis, MOB-based position verification, and ultra-low standby current - making it purpose-built for high-fidelity, battery-efficient camera lens actuation.

Availability

UPD168111AMA-6A5-E2-A is available at Aetrix Electronics and suitable for digital still camera autofocus systems, optical zoom mechanisms, and image stabilization modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for UPD168111AMA-6A5-E2-A 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and mixed-signal solutions for automotive, industrial, and consumer applications.

The UPD168111AMA-6A5-E2-A belongs to Renesas' µPD168xx microstep driver family, designed specifically for low-voltage, low-noise precision motion control in portable imaging devices.

FAQ

What is the function of the MOB pin on the UPD168111AMA-6A5-E2-A?

The MOB pin on the UPD168111AMA-6A5-E2-A outputs a logic-level signal indicating motor excitation position - "L" during one-phase (±100% ch1) or two-phase (equal +ve ch1/ch2) states. It enables closed-loop stop detection and position verification without external encoders, directly supporting lens calibration and auto-focus confirmation in the UPD168111AMA-6A5-E2-A system.

Does the UPD168111AMA-6A5-E2-A require an external clock source?

Yes, the UPD168111AMA-6A5-E2-A requires an external clock source applied to the OSCIN pin (pin 23) to generate internal timing for PWM chopping and microstep sequencing. It accepts either a crystal (1–10 MHz) or CMOS clock signal; the COSC pin (pin 5) connects a timing capacitor only when using the internal oscillator mode - not applicable to the UPD168111AMA-6A5-E2-A's default crystal-based operation.

How does the UPD168111AMA-6A5-E2-A handle undervoltage conditions?

The UPD168111AMA-6A5-E2-A incorporates an undervoltage lockout (ULVO) circuit that disables internal operation when VDD drops below 1.7 V (typ). This prevents erratic behavior or partial drive activation during brownout events. Once VDD recovers above threshold, normal operation resumes after RESETB deassertion - ensuring robust power sequencing in battery-powered UPD168111AMA-6A5-E2-A implementations.

Can the UPD168111AMA-6A5-E2-A drive both focus and zoom motors simultaneously?

Yes, the UPD168111AMA-6A5-E2-A integrates two fully independent H-bridge channels (ch1: OUT1A/OUT1B; ch2: OUT2A/OUT2B), each with dedicated current sense (FB1/FB2), filter (FIL1/FIL2), and power (VM1/VM2) connections. This allows concurrent, asynchronous control of focus and zoom stepper motors - a core capability confirmed in the UPD168111AMA-6A5-E2-A datasheet's dual-channel block diagram and application examples.

What is the purpose of the LATCH pin on the UPD168111AMA-6A5-E2-A?

The LATCH pin (pin 24) on the UPD168111AMA-6A5-E2-A controls serial data registration: when pulled high, it enables SDATA sampling on SCLK rising edges; its falling edge latches the full 16-bit word into the selected register (addressed by Df–Dd bits). This synchronous latch mechanism ensures deterministic command execution timing - essential for reliable microstep sequencing in the UPD168111AMA-6A5-E2-A.