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ADN8833

Analog Devices
Part Number ADN8833
Manufacturer Analog Devices
Description 1A Thermoelectric Cooler (TEC) Driver
Published Oct 4, 2016
Detailed Description Data Sheet Ultracompact, 1 A Thermoelectric Cooler (TEC) Driver for Digital Control Systems ADN8833 FEATURES Patented ...
Datasheet PDF File ADN8833 PDF File

ADN8833
ADN8833

Overview
Data Sheet Ultracompact, 1 A Thermoelectric Cooler (TEC) Driver for Digital Control Systems ADN8833 FEATURES Patented high efficiency single inductor architecture Integrated low RDSON MOSFETs for TEC driver TEC voltage and current operation monitoring No external sense resistor required Independent TEC heating and cooling current limit settings Programmable maximum TEC voltage 2 MHz PWM driver switching frequency External synchronization Digital thermal control loop compatible 2.
50 V reference output with 1% accuracy Available in a 25-ball, 2.
5 mm × 2.
5 mm WLCSP or in a 24-lead, 4 mm × 4 mm LFCSP APPLICATIONS TEC temperature control Optical modules Optical fiber amplifiers Optical networking systems Instruments requiring TEC temperature control VLIM/SD ILIM FUNCTIONAL BLOCK DIAGRAM VTEC ITEC VDD TEC CURRENT AND VOLTAGE SENSE AND LIMIT ADN8833 LINEAR POWER STAGE LDR CONT CONTROLLER PWM POWER STAGE PVIN SW VOLTAGE REFERENCE OSCILLATOR AGND VREF SFB EN/SY Figure 1.
PGNDx GENERAL DESCRIPTION The ADN88331 is a monolithic H-bridge TEC driver with integrated 1 A power MOSFETs.
It has a linear power stage with the linear driver (LDR) output and a pulse-width modulation (PWM) power stage with the SW output.
Depending on the control voltage at the CONT input, the ADN8833 drives current through a TEC to settle the temperature of a laser diode or a passive component attached to the TEC module to the programmed target temperature.
The control voltage applied to the CONT input is generated by a digital-to-analog converter (DAC) closing the digital proportional, integral, derivative (PID) loop of temperature control system.
The internal 2.
5 V reference voltage provides a 1% accurate output that is used to bias a voltage divider network to program the maximum TEC current and voltage limits for both the heating and cooling modes.
It can also be a reference voltage for the DAC and the temperature sensing circuit, including a thermistor bridge and an analog-to-d...


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