TC643VPA
TC643VPA Datasheet
TC643
| Part | Datasheet |
|---|---|
TC643VPA |
TC643VPA (pdf) |
| Related Parts | Information |
|---|---|
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TC643VUA |
TC643VUA |
| PDF Datasheet Preview |
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| TC643 INTEGRATED FAN / MOTOR DRIVER s Integrates Current Limited Power Driver and Diagnostic/Monitoring Circuits in a Single IC s Works with Standard DC Brushless Fans/Motors s Supports Efficient PWM Drive with Logic-Level Input s Supply Range 2.7V to 5.5V s Motor Voltage Independent of TC643 Supply Voltage Supports 3V-15V Fans! s Logic-Level Output Provides RPM Data s Optimized For Use as a Microcontroller Peripheral s Eliminates Discrete Components and Analog Circuit Design Effort s Internal Thermal Shutdown For Fail-safe Operation s Available in 8-Pin PDIP, SOIC, and MSOP Packaging s General Purpose Fan or Motor Speed Control s Power Supplies s Portable and Desktop Computers s Telecom Equipment, Servers s UPS’s, Power Amps, etc. FUNCTIONAL BLOCK DIAGRAM CEXT 0.002µF ONESHOT dV/dt DRIVER VFAN +5V VCC FAN ILMT I-LIMIT TC643 VREF GNDFAN GND The TC643 is a switchmode brushless DC fan/motor speed driver with diagnostic circuits. External components are kept to a minimum by integrating the power transistor on chip. Any logic-level signal can be used to drive the on-chip Power Driver. The output is current limited and a logic-level indication, ILMT, is provided to indicate an over-current condition. The RPM output gives an indication of motor RPM. Each time the motor current is interrupted by commutation, a logic pulse occurs on RPM. The fundamental frequency of the resulting square wave is 4 x rpm . See the Applications section for more information and system design guidelines. The TC643 mates easily with microcontrollers or other digital logic to form a complete motor or fan control and monitoring system, featuring Variable Speed PWM Drive RPM Indication and Motor Open / Motor Shorted / Motor Locked Fault Detection. The TC643 is available in a standard 8-pin plastic DIP, SOIC, and MSOP package. ORDERING INFORMATION Package Temp. Range TC643VOA TC643VPA TC643VUA 8-Pin SOIC 8-Pin Plastic DIP 8-Pin MSOP 0°C to +85°C 0°C to +85°C 0°C to +85°C PIN CONFIGURATIONS VCC 1 DRV 2 ILMT 3 RPM 4 PDIP/SOIC TC643VOA TC643VPA 8 GNDFAN 7 FAN 6 CEXT 5 GND MSOP VCC 1 8 GNDFAN DRV 2 7 FAN ILMT 3 TC643VUA 6 CEXT RPM 4 5 GND 2001 Microchip Technology Inc. DS21445A TC643-1 9/29/97 INTEGRATED FAN / MOTOR DRIVER TC643 ABSOLUTE MAXIMUM RATINGS* Package Power Dissipation TA 70°C Plastic DIP Small Outline SOIC 470mW MSOP Derating Factors 8mW/°C Supply Voltage Input Voltage, Any Pin GDN 0.3V to VCC + 0.3V Operating Temperature Note 3 40°C to +125°C Maximum Chip Temperature Note 3 +150°C Storage Temperature 65°C to +150°C Lead Temperature Soldering, 10 sec +300°C *Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Over Operating Temperature Range, VCC = 3.0V to 5.5V ±10%, GND = GNDFAN = 0V, unless otherwise specified. Parameter Test Conditions Supply Voltage Supply Current, Operating IL = 300mA IDD SHDN Supply Current, DRV < VIL ILMT, Shutdown Mode RPM Open ILIMIT Preset Current Limit |
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