Motor Pre-Driver from Diodes Incorporated Simplifies Speed Control

  Motor Pre-Driver from Diodes Incorporated Simplifies Speed Control

Business Wire

PLANO, Texas -- June 26, 2013

Diodes Incorporated (Nasdaq: DIOD), a leading global manufacturer and supplier
of high-quality application specific standard products within the broad
discrete, logic and analog semiconductor markets, today announced the
ZXBM1021. This single-phase, brushless, DC motor pre-driver provides a small,
feature-rich variable speed control solution for cooling fans, blowers,
extractors, motors and pumps deployed in a variety of consumer and industrial
products. By integrating an array of normally external components, including a
PWM integrator and MOSFET buffers, this flexible pre-driver enables designers
to greatly simplify system architecture and reduce overall board component

The pre-driver can closely control motor speed via the direct application of
either an external PWM signal, DC voltage signal or thermistor network input.
Through the integration of Hall bias and amplifier circuits, compatibility
with all types of Hall effect sensor is assured. An open-collector frequency
generator pin provides a tachometer output enabling external monitoring of
rotation and speed. To prevent motor stalling or speed falling below a minimum
value in the event of loss of control signals, the ZXBM1021 allows the setting
of a minimum speed.

Offering high-side and low-side drive outputs, with 50mA sink and 100mA
source/sink capability, the ZXBM1021 can be accurately matched to the needs of
external H-bridge switches and motor powers without the need for additional
buffering. A separate low-side output drive supply voltage pin also provides
the ability to adjust external low-side MOSFET turn-on speed independently of
turn-off speed to help minimize EMI noise and shoot-through.

An operating voltage range of 6.8V to 18V means the pre-driver will support
12V motors directly, and 24V and 48V motors via an external voltage regulator.
With a programmable over current limit, the pre-driver is able to detect
locked rotor conditions and protect the H-bridge and motor windings from
over-heating or burn-out, instigating a soft start on removal of the rotor
lock to minimize motor inrush current.

Supplied in the small footprint, low-profile and thermally enhanced
U-QFN4040-20 chip package and with a wide operating temperature range of -40ºC
to +110ºC, the ZXBM1021 is well-suited for space-constrained and thermally
demanding applications. A QSOP20-packaged variant will be introduced later in
the year. For further information, visit the Company’s website at

About Diodes Incorporated

Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor's SmallCap 600 and
Russell 3000 Index company, is a leading global manufacturer and supplier of
high-quality application specific standard products within the broad discrete,
logic and analog semiconductor markets. Diodes serves the consumer
electronics, computing, communications, industrial, and automotive markets.
Diodes' products include diodes, rectifiers, transistors, MOSFETs, protection
devices, functional specific arrays, single gate logic, amplifiers and
comparators, Hall-effect and temperature sensors; power management devices,
including LED drivers, AC-DC converters and controllers, DC-DC switching and
linear voltage regulators, and voltage references along with special function
devices, such as USB power switches, load switches, voltage supervisors, and
motor controllers. Diodes’ corporate headquarters, logistics center, and
Americas' sales office are located in Plano, Texas. Design, marketing, and
engineering centers are located in Plano; San Jose, California; Taipei,
Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer fabrication
facilities are located in Kansas City, Missouri and Manchester, with two more
located in Shanghai, China. In addition, two assembly-test facilities are
located in Shanghai; two are located in Chengdu, China, with one in Neuhaus
and one in Taipei. Additional engineering, sales, warehouse, and logistics
offices are located in Fort Worth, Texas; Taipei; Hong Kong; Manchester;
Shanghai; Shenzhen, China; Seongnam-si, South Korea; Suwon, South Korea;
Tokyo, Japan; and Munich, Germany, with support offices throughout the world.
For further information, including SEC filings, visit Diodes’ website at


Company Contact:
Diodes Incorporated
Julie Holland
VP, Worldwide Analog Products
P: 972-987-3900
Investor Relations Contact:
Shelton Group
Leanne K. Sievers
EVP, Investor Relations
P: 949-224-3874
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