ADI LTC1923EGN#PBF

热电冷却器/加热器2mA2.7V ~ 5.5V

Overview

The LTC1923EGN is a pulse width modulator intended for thermoelectric cooler (TEC) or heater applications requiring either unidirectional or bidirectional drive circuits. All of the necessary control circuitry and two sets of complementary output drivers are integrated into the LTC1923EGN to drive a full bridge, providing an efficient means of bidirectional current flow to the TEC. An accurate temperature control loop to stabilize the temperature of a laser diode system is easily achieved with the addition of just a few external components. Typical temperature setpoint accuracy of 0.1°C is achievable with the LTC1923. Adding an instrumentation amplifier front end allows setpoint stability of 0.01°C.

The part features independent adjustable heating and cooling pulse-by-pulse current limit, current soft-start for controlled start-up, output slew rate control to reduce system noise, differential current sense and voltage amplifiers and a host of auxiliary circuits to protect the laser and provide redundant system monitoring.

Features

Independent adjustable heating and cooling pulse-by-pulse current limit

current soft-start for controlled start-up

High efficiency, low noise topology

TEC voltage clamping

Applications

Laser-based fiber optic links

Medical instruments

CPU temperature regulators