GENERAL DEscriptION

The SGM4546 is matched dual-channel high speed, high sound pressure level (SPL) piezo-sounder driver which is integrated boost DC/DC to achieve high driven voltage. The unique circuit design provides excellent performance for delivering 2A peak current to highly capacitive loads.

To reduce problems with time and clock skew, SGM4546 is a good choice, with matching delays and maintaining integrity of input to output pulse-widths. Matching rise/fall delay times improve the drive capability and speed. Non-overlapping drive technology is used to minimize the dynamic switching loss.

In order to get higher volume sound from piezo-Sounder, boost DC/DC is integrated to provide high driven voltage. The tiny packages make the device very suitable for space limited applications.

The SGM4546 is available in Green TDFN-3×3-14L and TSSOP-16 (Exposed Pad) packages. It operates over an ambient temperature range of -40℃ to +85℃.

FEATURES

Integrated Boost DC/DC to Achieve 26V (MAX) Driven Voltage

2A Peak Driven Current to Drive Capacitive Loads

Power Supply Voltage Range: 1.8V to 5.5V

High Speed Driver

Very Short Rise Time and Fall Time

Improved Response Times

Matched Rise Time and Fall Time

Independent Enable Control for Each Channel

Reduced Clock Skew between Dual Channels

Output is at Low under UVLO Protection, Enable Pin Floating or Disable Status

High Noise Immunity

Improved Clocking Rate

Low Supply Current and Output Impedance

-40℃ to +85℃ Operating Temperature Range

Available in Green TSSOP-16 (Exposed Pad) and TDFN-3×3-14L Packages

APPLICATIONS

Piezo-Sounder Driver