ADN8833

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 C...