资 源 简 介
Powered by SMARTMOS technology， the 33813 delivers a cost-opTImized IC soluTIon for managing one-cylinder engines. With five drivers， two pre-drivers， a 5.0 V regulator for the MCU， a protected external sensor supply and a high level of integraTIon， the IC offers an ideal response to contemporary market requirements. The innovaTIve VRS system optimizes noise immunity under cranking conditions. Diagnostic and protection features present on all outputs allow applications to operate with greater safety. Features： • Operates over supply voltage range of 4.5 V 《 VPWR 《 36 V • Start-up/shut-down control and power sequence logic with KEYSW input • MCU supply： VCC is a 5.0 V （±2.0%， 200 mA） regulated supply • Sensor supply： VPROT （100 mA） is a VCC tracking protected sensor supply • Two configurable pre-drivers for IGBT or general purpose gate MOSFETs for ignition and O2 sensor （HEGO） heater： • PWM • Overcurrent shutdown • Short-to-battery shutdown • Five low-side drivers with full diagnostics， self-protection and PWM control： • One fuel injector drivers， RDS（on） = 0.6 Ω， ILIMIT = 1.8 A， to drive typical 12 Ω high-impedance injectors • Relay 1 driver， RDS（on） = 0.4 Ω， ILIMIT = 3.0 A， to drive fuel pump • Relay 2 driver， RDS（on） = 1.5 Ω， ILIMIT = 1.2 A， to drive power relay • Lamp driver， RDS（on） = 1.5 Ω， ILIMIT = 1.2 A， to drive warning lamp or an LED • Programmable Tachometer Driver， RDS（on） = 20 Ω， Ishutdown = 60 mA， to drive a Tachometer display • Innovative configurable VRS conditioning circuit， with two different parameter settings for engine cranking and running mode and an optional automatic mode to improve noise immunity in cranking conditions • K-line （ISO9141） • MCU reset generator and programmable watchdog • MCU Interface： 16-bit SPI and parallel interface with 5.0 V IO capability
