Diodes Incorporated ZXBM2001X10TC

Overview

ZXBM2001X10TC from Zetex Semiconductors is a 2-phase DC brushless motor pre-driver IC for fan and blower control, featuring integrated Hall amplifier, dual-function LOCK/FG open-collector output (rotor lock detection + speed pulse generation), PWM speed control via SPD voltage input (1–2 V range), and MSOP-10 package. It supports up to 18 V supply, delivers ±80 mA phase drive current, and operates from –40°C to +85°C.

For engineers reviewing the ZXBM2001X10TC datasheet, ZXBM2001X10TC pinout, ZXBM2001X10TC application, or ZXBM2001X10TC equivalent, key selection considerations include its combined rotor lock/speed feedback capability, thermistor-compatible SPD interface, CLCK capacitor-based lock recovery timing, and compatibility with bipolar or MOSFET external power stages in PC cooling, instrumentation fans, and HVAC blowers.

Technical Context

The ZXBM2001 implements a sensor-based commutation controller with differential Hall input (H+/H−) for rotor position sensing, generating complementary phase drive signals (PH1/PH2) as open-emitter Darlington outputs. Its LOCK/FG pin combines two critical functions: frequency-generating tachometer output (2× motor RPM) under normal operation and high-level rotor lock alarm when CLCK threshold is exceeded.

Speed regulation uses analog voltage control on SPD (1–2 V = 100%–0% PWM duty), with internal 1.5 V bias enabling 50% default drive. CLCK and CPWM pins accept external capacitors to set lock-recovery timing (On:Off ratio 1:7–1:10) and PWM frequency (24–34 kHz), respectively-both governed by internal charge/discharge currents and fixed 1 V/2 V thresholds.

Key Specifications

Pinout & Package

Package: MSOP-10 (JEDEC MO-187 BA), 3.0 mm × 4.9 mm body, 0.5 mm pitch, exposed pad optional for thermal relief.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-phase BLDC pre-driver applications.

Compared with A3977SLBTR-T and DRV10983RGER, the ZXBM2001X10TC uniquely delivers Hall-sensor-based commutation with combined lock/frequency feedback in a pre-driver topology-enabling robust, low-jitter speed control and fail-safe stall handling essential for mission-critical cooling systems.

Availability

ZXBM2001X10TC is available at Aetrix Electronics and suitable for PC mainframe cooling, instrumentation fan control, and automotive HVAC blower applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ZXBM2001X10TC 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

Zetex Semiconductors (now part of Diodes Incorporated) is a UK-based analog and power semiconductor specialist focused on high-performance, application-optimized ICs for industrial, computing, and automotive markets.

The ZXBM200x series was designed specifically for reliable, low-cost 2-phase BLDC fan and blower control-emphasizing integrated Hall amplification, dual-function feedback, and programmable lock recovery to reduce system-level design complexity.

FAQ

What is the function of the CLCK pin on the ZXBM2001X10TC?

The CLCK pin accepts an external capacitor to set the timing intervals for rotor lock recovery. When a locked rotor condition is detected, the device enters a safe retry mode: driving the motor for a short "ON" period (determined by CLCK capacitor and 2.8 µA charge current), then waiting a longer "OFF" period (set by same capacitor and 0.28 µA discharge current). A 1.0 µF capacitor yields ~0.36 s ON and ~3.6 s OFF at 12 V.

Can the SPD pin be used as an enable/disable control?

Yes-the SPD pin functions as both speed control and hardware enable. Leaving it open-circuit defaults to ~50% PWM drive. Tying it to ground via a 10 kΩ resistor forces 100% drive. Applying 2.0 V to VCC disables all phase outputs completely, effectively acting as a hard shutdown signal independent of Hall input or lock state.

How does the LOCK/FG pin differentiate between normal operation and rotor lock?

During normal rotation, LOCK/FG outputs clean square-wave pulses at twice the motor's mechanical RPM. If rotation stops, the internal CLCK comparator detects absence of Hall transitions and forces LOCK/FG high (open-collector, so pulled up externally) regardless of Hall sensor state. It remains high until valid Hall edges resume-providing unambiguous stall indication without software polling.

What external components are required for basic operation with a 3-pin Hall sensor?

For a 3-pin buffered Hall sensor, connect its output to H+, tie H− to a resistive divider (e.g., two equal-value resistors from VCC and GND) to hold it at VCC/2, and add a 10 kΩ pull-up on LOCK/FG. No CLCK or CPWM capacitors are needed for basic operation; SPD can be left open for 50% drive. A 100 nF ceramic decoupling capacitor between VCC and GND near the IC is mandatory.