The 33800 is a combination output switch and driver IC that may be used in numerous powertrain applications. The IC contains two programmable constant current drivers (CCD), an octal, low-side, serial switch (OSS) and six, external MOSFET gate pre-drivers (GD). The IC has overvoltage, undervoltage and thermal protection. All drivers and switches, including the external MOSFETs, have overcurrent protection, off-state open load detection, on-state shorted load detection and fault annunciation via the serial peripheral interface (SPI). Additional features include: Low power sleep mode, Heated Exhaust Gas Oxygen (HEGO) sensor diagnostics, output control via serial and/or parallel inputs, PWM capability, and programmable current output with dithering. These features, along with cost effective packaging, make the 33800 ideal for Powertrain Engine Control applications.
Features
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Wide operating voltage range, 5 < VPWR < 36 volts
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Interfaces to 3.3 and 5 volt microprocessors via SPI protocol
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Low, sleep mode, standby current, typically 10 uA.
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Internal or external voltage reference
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Internal oscillator with calibrate capability Measures resistance to monitor HEGO sensors
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CCDs have programmable current, dither frequency and amplitude
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OSSs can be paralleled to increase current capability
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GDs have programmable frequency and duty cycle PWM
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All outputs controllable via serial and/or parallel inputs
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