LTC1923EGN#TRPBF

The LTC1923EGN#TRPBF by ADI Electronics is a pulse width modulator designed for thermoelectric cooler (TEC) and heater applications requiring unidirectional or bidirectional drive circuits. It integrates necessary control circuitry and complementary output drivers to manage bidirectional current flow to the TEC, enabling efficient temperature stabilization.

Key features include high efficiency, low noise topology, and adjustable output slew rate to reduce EMI. The controller offers adjustable pulse-by-pulse bidirectional TEC current limit, open/shorted thermistor indication, and TEC voltage clamping. It also provides TEC current, voltage, and heat/cool status outputs. The device supports adjustable and synchronizable oscillator frequency, reducing filter component size and system noise. A 2.5V reference voltage output is available, with a minimum operating voltage of 2.7V.

This controller is suitable for applications such as laser-based fiber optic links, medical instruments, and CPU temperature regulators. It facilitates accurate temperature control loops, with typical setpoint accuracy of 0.1°C, and can achieve setpoint stability of 0.01°C with an instrumentation amplifier front end. The part features current soft-start for controlled start-up and differential current sense and voltage amplifiers for system monitoring and protection.

The LTC1923EGN#TRPBF is available in 5mm x 5mm QFN and 28-pin SSOP packages. The solution footprint is less than 0.6" x 0.8" on a double-sided PCB.