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TC7662BCOA Fiches technique(PDF) 1 Page - TelCom Semiconductor, Inc |
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TC7662BCOA Fiches technique(HTML) 1 Page - TelCom Semiconductor, Inc |
1 / 9 page 4-83 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 TC7662B CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER FEATURES s Wide Operating Voltage Range: 1.5V to 15V s Boost Pin (Pin 1) for Higher Switching Frequency s High Power Efficiency is 96% s Easy to Use – Requires Only 2 External Non-Critical Passive Components s Improved Direct Replacement for Industry Stan- dard ICL7660 and Other Second Source Devices APPLICATIONS s Simple Conversion of +5V to ±5V Supplies s Voltage Multiplication VOUT = ±nV IN s Negative Supplies for Data Acquisition Systems and Instrumentation s RS232 Power Supplies s Supply Splitter, VOUT = ±V S/2 GENERAL DESCRIPTION The TC7662B is a pin-compatible upgrade to the Indus- try standard TC7660 charge pump voltage converter. It converts a +1.5V to +15V input to a corresponding – 1.5 to – 15V output using only two low-cost capacitors, eliminating inductors and their associated cost, size and EMI. The on-board oscillator operates at a nominal fre- quency of 10kHz. Frequency is increased to 35kHz when pin 1 is connected to V+, allowing the use of smaller external capacitors. Operation below 10kHz (for lower supply current applications) is also possible by connecting an external capacitor from OSC to ground (with pin 1 open). The TC7662B is available in both 8-pin DIP and 8-pin small outline (SO) packages in commercial and extended temperature ranges. FUNCTIONAL BLOCK DIAGRAM TC7662B GND INTERNAL VOLTAGE REGULATOR RC OSCILLATOR VOLTAGE– LEVEL TRANSLATOR ÷ 2 V + CAP + 82 7 6 OSC LV 3 LOGIC NETWORK VOUT 5 CAP – 4 1 BOOST 1 2 3 4 8 7 6 5 TC7662BCPA TC7662BEPA BOOST CAP + GND CAP – VOUT LOW VOLTAGE (LV) OSC + V 1 2 3 4 8 7 6 5 TC7662BCOA TC7662BEOA BOOST CAP + GND CAP – VOUT LOW VOLTAGE (LV) OSC + V PIN CONFIGURATION (DIP and SOIC) ORDERING INFORMATION Temperature Part No. Package Range TC7662BCOA 8-Pin SOIC 0 °C to +70°C TC7662BCPA 8-Pin Plastic DIP 0 °C to +70°C TC7662BEOA 8-Pin SOIC – 40 °C to +85°C TC7662BEPA 8-Pin Plastic DIP – 40 °C to +85°C TC7660EV Evaluation Kit for Charge Pump Family TC7662B-8 9/11/96 EVALUATION KIT AVAILABLE |
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