SGM41298XG/TR

SGM41298XG/TR is a monolithic thermoelectric cooling (TEC) thermostat driver device with two-stage feedback amplifier. This device includes a differential driver (output) stage, an internal 2.5V output reference voltage and two zero-drift, rail-to-rail chopper amplifiers. The first chopper amplifier biases the sensed temperature signal and another is an error amplifier for compensating the closed loop temperature control. This amplifier can be used with a digital controller as well. The TEC is driven differentially between a linear push-pull stage and a pulse-width modulation (PWM) switching stage. A linear push-pull stage forms one of the arms of the differential output which has a relatively high gain and saturates if the error signal is not close to zero ( 2.5%). Application includes TEC temperature controls, instruments requiring TEC temperature controls, optical modules, optical fibre amplifiers, optical networking systems.

• High efficiency single inductor architecture
• Single-ended to differential driver with low RDSON MOSFETs inside
• TEC voltage and current monitoring, no external sense resistor required
• Independent heating and cooling current/voltage limits programming
• Two rail-to-rail, zero-drift chopper amplifiers
• Compatible with RTD or NTC thermal sensors
• Internal oscillator frequency is 2MHz typ (EN high, TJ = +25?)
• Reference voltage is 2.500V typ (IREF = 0mA to 10mA, TJ = +25?)
• Operating temperature range from -40°C to +125°C
• WLCSP-2.55×2.55-25B package