link to page 10 PA22GENERAL Please read Application Note 1 “General Operating Considerations” which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexana- log.com for Apex Microtechnology’s complete Application Notes library, and Technical Seminar Workbook, and Evaluation Kits. SAFE OPERATING AREA (SOA) The MOSFET output stage of the PA22 is not limited by second breakdown considerations as in bipolar output stages. Only thermal considerations and current handling capabilities limit the SOA (see Figure 15). The output stage is protected against transient flyback by the parasitic body diodes of the output stage MOS- FET structure. However, for protection against sustained high energy flyback conditions, external fast-recov- ery diodes must be used. Figure 15: Safe Operating Area (SOA) ϭϱŵƐ͕d (A) S 10 ͕d C = 70°C or -V C = 25°C S ͕d ͕d C = 70°C C = 85°C 1 Output Current from +V 0.1 1 10 100 ^ƵƉƉůLJƚŽKƵƚƉƵƚŝīĞƌĞŶƟĂů͕s -V (V) S OUT 10 PA22 REV B Document Outline Features Applications Description Figure 1: Equivalent Schematic Typical Connection Figure 2: Typical Connection Pinout and Description Table Figure 3: External Connections Specifications Absolute Maximum Ratings Input Gain Output Power Supply Thermal Figure 14: Temp Sense vs Time General Safe operating area (SOA) Figure 15: Safe Operating Area (SOA) typical application Figure 16: Typical Application Schematic current limit overvoltage protection Figure 17: Overvoltage Protection power supply bypassing phase Compensation Temperature Sense Package Options Package Outline (Style LL)
