The SGM41298 is a monolithic thermoelectric cooling (TEC) thermostat driver device with two-stage feedback amplifier. The 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%). This means that the TEC is effectively driven by the other arm. The other arm has a lower gain, and high frequency PWM switching driver that can drive the TEC with high efficiency. The PWM switching driver output is passed through an LC filter to remove large voltage ripple before reaching the TEC. It can sink or source current for both the heating and cooling modes connected to the TEC and stabilize its temperature at the set point.
The SGM41298 is available in a Green WLCSP-2.55×2.55-25B package. It operates over the -40℃ to +125℃ junction temperature range.
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
PWM Driver Switching Frequency: 2.0MHz (TYP)
Two Rail-to-Rail, Zero-Drift Chopper Amplifiers
Compatible with RTD or NTC Thermal Sensors
2.5V Output Reference Voltage
Patent Pending
Available in a Green WLCSP-2.55×2.55-25B Package
TEC Temperature Controls
Instruments Requiring TEC Temperature Controls
Optical Modules
Optical Fiber Amplifiers
Optical Networking Systems
Part Number | Status | Package | Pins | Pd-Free | RoHS | REACH | Green | MSL Rating | Operating Temperature Range | Material Content | Reliability Report | Unit Resale Price* (Volume Range: in USD) | Lead Time** (Volume Range: Days) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SGM41298XG/TR | Active | WLCSP-2.55×2.55-25B | 25 | Yes | Yes | Yes | Yes | MSL1 | -40℃ to +125℃ | View | View | 1-24 units : $12.25/unit 25-99 units : $10.5/unit 100-249 units : $8.75/unit 250-499 units : $7/unit 500-999 units : $6.125/unit 1000-9999 units : $4.55/unit | 3K-9K : 14 days 10K-99K : 35 days 100K-999K : 66 days 1000K and above : 84 days |
* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.
** The lead time provided is for reference purposes only and is subject to change based on different circumstances.
