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NNO DC-TO DC Converter Control Circuits t a DESCRIPTION D Series is a High Integrated control circuit containing the primary functions . The IN202B w required for DC-to-DC converters with 2% Voltage reference, and two operational amplifiers. This w w series was specifically designed to be incorporated in step-down, step-up and voltage inverting applications with a Minimum number of external components. The IN202B provides an additional function of voltage reference with 2% variation in temperature range of 0~70. It is an advantage for most power system design. Sh a ee om .c 4U INNO-TECH Co., Ltd. t TEL886-2-26589998 FAX886-2-26573636 http //www.inno.com.tw IN202 FEATURES (1) TWO operational amplifier : Internally frequency compensated for unity gain. Large DC voltage gain. --------------------------------------100dB Wide bandwidth (unity gain). ------------------------------1MHz Low input offset voltage. Input common-mode voltage range includes ground. Differential input voltage range equal to the power supply voltage. Large output voltage swing. --------------------------------0V to VCC -1.5V (2) DC-to-DC CONVERTER : Operation from 4.0 V to 30V Input. Low Standby Current. Current Limiting. Output Switch Current to 1.5A. Output Voltage Adjustable. Maximum Operation Frequency to 100KHz. Precision 2% Reference. w w w t a .D S a e h U t4 e .c m o Aug 24, 2001 1/5 w w w .D a aS t ee h 4U t om .c Version 1.0 NNO TEL886-2-26589998 FAX886-2-26573636 http //www.inno.com.tw INNO-TECH Co., Ltd. IN202 ADVANTAGES Containing two internally compensated operational amplifier. 2% Voltage reference (0 ~ 70 ). High heating sink capability. Enhance ESD function. Operation Temperature Range from -20 to 100 . Cost Effective. Space Saving. Less External Component. PIN ASSIGNMENT Switch 1 Collector Switch 2 Emitter Timing 3 Capacitor 4 GND IN202B Driver Collector 16 IPK Sense 15 VDD 14 Comparator Inverting Input 13 5 VCC 6 OUT1 VREF 12 OUT2 11 7 INP1 INP2 10 Aug 24, 2001 Version 1.0 2/5 NNO 8 INB1 TEL886-2-26589998 FAX886-2-26573636 http //www.inno.com.tw INNO-TECH Co., Ltd. INB2 9 IN202 Aug 24, 2001 Version 1.0 3/5 NNO TEL886-2-26589998 FAX886-2-26573636 http //www.inno.com.tw INNO-TECH Co., Ltd. IN202 REPRESENTATIVE SCHEMATIC DIAGRAM Switch 1 Collector Q2 Q1 16 Drive Collector QS R 100 15 IpK Sense Switch 2 Emitter CT Timing 3 Capacitor Comparator 1.25V Reference Requlator + I pK Oscillator 14 VDD 4 GND 13 Comparator Inverting Input 12 VREF 11 OUT2 VCC 5 6 OUT1 + 7 INP1 8 INB1 OP1 + OP2 - 10 INP2 9 INB2 Aug 24, 2001 Version 1.0 4/5 NNO TEL886-2-26589998 FAX886-2-26573636 http //www.inno.com.tw INNO-TECH Co., Ltd. IN202 Aug 24, 2001 Version 1.0 5/5 |
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