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| AQ105 Secondary V/I amplifier SOT23-5 and SC70-5 Package Product Specification Revision 1.3 July 17, 2006 General Description The AQ105 is a low cost secondary control circuit for low power applications needing constant voltage and constant current control. It implements a simple single-loop control by modifying the internal reference level as a function of current above the current limit threshold. The current loop reduces the reference by 40 mV per mV change at the current sense input. The error amp provides high gain and bandwidth under low voltage operation. Applications * Offline Battery Chargers * Constant V/ Constant I supplies Features * 1.25V reference * 200mV current limit threshold * Error amp output swings near ground for * * * * * * * * low voltage operation High PSRR and line regulation Low current consumption Offered in ultra small SC70-5 package Open collector output Low voltage operation 2.2V 10mA current sink 50 ppm/C typical temperature deviation RoHS compliant available Block Diagram Pin Configuration www.acutechnology.com AQ105 Acutechnology Semiconductor Inc. AQ105 Typical Application Pin Descriptions Pin 1 2 3 4 5 Pin Name VCC GND COMP FB CS Function Positive supply Ground Output of error amplifier; 10 mA source/sink capability Inverting input to error amplifier; will have threshold of 1.25V. Current sense input Ordering Information Device AQ105 AQ105 AQ105 AQ105 Note: The Operating Tj -20C 105C -20C 105C -20C 105C -20C 105C %Tol 1.0 1.0 1.0 1.0 Pkg Type SOT-23-5 SOT-23-5 SC70-5 SC70-5 VOUT 1.25V 1.25V 1.25V 1.25V Wrap T&R T&R T&R T&R Ordering Number AQ105DY-M5-12-TR AQ105DY-M5-12-TRL AQ105DY-C5-12-TR AQ105DY-C5-12-TRL TRL parts are Lead Free and RoHS compliant. www.acutechnology.com 2 Rev. 1.3 July 17, 2006 Acutechnology Semiconductor Inc. AQ105 Absolute Maximum Ratings Parameter VCC Voltage COMP Voltage REF Voltage CS Voltage (Self limiting diodes) VCC, COMP, REF, CS Current Operating Junction Temperature Lead Temperature (soldering 10 seconds) Storage Temperature Range ESD Rating (HBM) Value 20 20 20 1 50 150 260 -65 to +150 2 Units V V V V mA C C C KV Electrical Specifications Electrical characteristics are guaranteed over the full temperature range -20C Conditions VCOMP=1V VCC=15V Ta=25C VCC=2.5V to VCC=18V ICOMP=1mA to 5mA -20C Typ 0.2 Max 18 0.5 1.263 1 2 1 500 Units V mA V mV mV % nA dB dB MHz 1.238 1.250 0.2 1 0.5 -500 40 80 2.5 200 2.5 200 197 195 36 40 150 220 250 mV mA/mV TRANSC Output Transconductance Ileak Vcs Gain Ics Output Leakage Current Current sense threshold voltage Current sense gain to reference Bias current 400 203 205 44 nA mV mV/mV A www.acutechnology.com 3 Rev. 1.3 July 17, 2006 Acutechnology Semiconductor Inc. AQ105 Package Dimensions SOT23-3, SOT23-4, SOT23-5, SOT23-6 www.acutechnology.com 4 Rev. 1.3 July 17, 2006 Acutechnology Semiconductor Inc. AQ105 Package Dimensions (contd.) SC70-3, SC70-4, SC70-5, SC70-6 Contact Information Acutechnology Semiconductor Inc. 3487 McKee Rd. Suite 52 San Jose CA , USA 95127 Disclaimer The information furnished by Acutechnology in this data sheet is believed to be accurate and reliable. However, Acutechnology assumes no responsibility for its use. Acutechnology reserves the right to change circuitry and specifications at any time without notification to the customer. TEL: FAX: website: (408) 259-2300 (408) 259-9160 www.acutechnology.com Life Support Policy Acutechnology Products are not designed or authorized for use as components in life support devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. www.acutechnology.com 5 Rev. 1.3 July 17, 2006 |
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