The A4447 is a 2 A, high efficiency general-purpose buck regulator designed for a wide variety of applications. The output voltage is adjustable from 0.8 to 24 V, based on a resistor divider and the 0.8 V ± 2 % reference. External components include an external clamping diode, inductor, and filter capacitor. The off-time is determined by an external resistor to ground. It operates in both continuous and discontinuous modes to maintain light load regulation. An internal blanking circuit is used to filter out transients due to the reverse recovery of the external clamp diode. Typical blanking time is 200 ns.
This new device is ideal for various end products including applications with 8 to 50 V input voltage range and require up to 2 A output current, such as uninterruptible power supplies, point of sale (POS) applications, and industrial applications with 24 or 36 V bus.

Features and Benefits
*Wide input voltage range: 8 to 50 V
*Integrated low RDS(on) DMOS switch
*2 A continuous output current
*Adjustable fixed off-time
*Highly efficient
*Adjustable output: 0.8 to 24 V
*Small package with exposed thermal pad

Applications include
*Printer power supplies
*Office automation equipment
*POS thermal, laser, photo, and inkjet printers
*Tape drives
*Industrial applications


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The SCM1106M inverter power module (IPM) device provides a robust, highly-integrated solution for optimally controlling 3-phase motor power inverter systems and variable speed control systems used in energy-conserving designs to drive motors of residential and commercial appliances. These ICs take 85 to 253 VAC input voltage, and 10 A (continuous) output current. They can withstand voltages of up to 600 V (IGBT breakdown voltage).
The SCM1100M series employs a new, small-footprint proprietary DIP package. The IC itself consists of all of the necessary power elements (six IGBTs), pre-drive ICs (three), and flyback diodes (six), needed to configure the main circuit of an inverter, as well as a bootstrap circuit (three bootstrap diodes and three boot resistors) as a high-side drive power supply. This enables the main circuit of the inverter to be configured with fewer external components than traditional designs.
Applications include residential white goods (home appliances)
and commercial appliance motor control, such as:
*Air conditioner fan motor
*Refrigerator compressor motor
*Washing machine main motor
*Air conditioner compressor motor

Features and Benefits
*Each half-bridge circuit consists of a pre-driver circuit that is completely independent from the others
*Protection against simultaneous high- and low-side turning on
*Bootstrap diodes with series resistors for suppressing inrush current are incorporated
*CMOS compatible input (3.3 to 5 V)
*Designed to minimize simultaneous current through both high- and low-side IGBTs by optimizing gate drive resistors
*UVLO protection with auto restart
*Overcurrent protection with off-time period adjustable by an external capacitor
*Fault (FO indicator) signal output at protection activation: UVLO (low side only), OCP, and STP
*Proprietary power DIP package

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* Schottky Barrier Chip
* Guard Ring for Transient Protection
* Low Forward Voltage Drop
* Low Reverse Leakage Current
* High Surge Current Capability
* Plastic Material has UL Flammability Classification 94V-O

Mechanical Data
* Case: ITO-220A, Full Molded Plastic
* Terminals: Plated Leads Solderable per MIL-STD-202, Method 208
* Polarity: See Diagram
* Weight: 2.24 grams (approx.)
* Mounting Position: Any
* Mounting Torque: 11.5 cm-kg (10 in-lbs) Max.
* Lead Free: For RoHS / Lead Free Version, Add “-LF” Suffix to Part Number, See Page 4

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