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Part Number: CA3228
Description: The CA3228 is a monolithic integrated circuit designed as an automotive speed-control system.T...
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CA3228
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DataSheet
General Description
CA3228 General Description
The CA3228 is a monolithic integrated circuit designed as an automotive speed-control system.
The system monitors vehicle speed and compares it to a stored reference speed. Any deviation in vehicle speed causes a servo mechanism to open or close the engine throttle as required to eliminate the speed error. The reference speed, set by the driver, is stored in a 9-bit counter.
The reference speed can be altered by the ACCEL and COAST driver commands. The ACCEL command causes the vehicle to accelerate at a controlled rate; the COAST command disables the servo, thereby forcing the vehicle to slowdown. Application of the brake disables the servo and places the system in the standby mode while the RESUME command returns the vehicle to the last stored speed.
Vehicle speed and driver commands are inputs to the integrated circuit via external sensors. Actuators are needed to convert the output signals into the mechanical action necessary to control vehicle speed.
The CA3228 is supplied in a 24 lead dual-in-line plastic package (E suffix). Refer to AN7326 for application information.
CA3228 Maximum Ratings
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +9.0V
Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Driver Command Input (ICMD), Pin 3 . . . . . . . . . . . . . . . . . . . 2mA
Brake Input (IBRAKE), Pin 12 . . . . . . . . . . . . . . . . . . . . . . . . 2mA
Storage Temperature Range . . . . . . . . . . . . . . . . -65 to +150
Maximum Junction Temperature. . . . . . . . . . . . . . . . . . . . . +150
Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Driver Command Input (ICMD), Pin 3 . . . . . . . . . . . . . . . . . . . 2mA
Brake Input (IBRAKE), Pin 12 . . . . . . . . . . . . . . . . . . . . . . . . 2mA
Storage Temperature Range . . . . . . . . . . . . . . . . -65 to +150
Maximum Junction Temperature. . . . . . . . . . . . . . . . . . . . . +150
CA3228 Features
• Low Power Dissipation
• I2L Control Logic
• Power-On Reset
• On-Chip Oscillator for System Time Reference
• Single Input Line for Operator Commands
• Amplitude Encoded Control Signals
• Transient Compensated Input Commands
• Controlled Acceleration Mode
• Internal Redundant Brake and Low-Speed Disable
• Braking Disable
• I2L Control Logic
• Power-On Reset
• On-Chip Oscillator for System Time Reference
• Single Input Line for Operator Commands
• Amplitude Encoded Control Signals
• Transient Compensated Input Commands
• Controlled Acceleration Mode
• Internal Redundant Brake and Low-Speed Disable
• Braking Disable
CA3228 Typical Application
• Automotive Speed Control
• Residential and Industrial Heating and Cooling Controls
• Industrial AC and DC Motor Speed Control
• Applications Requiring Acceleration and Deceleration Control
• Residential and Industrial Heating and Cooling Controls
• Industrial AC and DC Motor Speed Control
• Applications Requiring Acceleration and Deceleration Control
CA3228 Connection Diagram
CA3228
PDF/DataSheet Download
- Datasheet: CA3228
- File Size: 115864 KB
- Manufacturer: INTERSIL [Intersil Corporation]
- Click here to Download
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