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2022-09-24 23:33:15
IXPD610-Industrial Control IC
The IXDP610 digital pulse width modulator (DPWM) is a programmable CMOS LSI device that receives digital pulse width data from a microprocessor and generates two complementary, non-overlapping, pulse width modulated direct digital control signals for switching power bridges. DPWM is based on the operation of the microprocessor directly controlled and interfaces with most standard, easy microprocessor and microcomputer buses. The IXDP610 is packaged in an 18-pin ultra-thin DP. The PWM waveform generated by the IXDP610 is output from the comparison result of the pulse width counter to the phone number stored in the pulse width latch (see below). A programmable "dead time" has been incorporated into the PWM waveform. Dead-time logic disables the required dead-time interval at every two output comparator output transitions. The output stage provides complementary PWM output signals capable of sinking and sourcing 20mA TTL voltage levels. Output disable logic can be activated by software or hardware. This facilitates cycle-by-cycle current limiting, short circuit, overtemperature, and saturation protection schemes. The IXDP610 is capable of operating at PWM frequencies from zero to 390kHz; programmable dead time from 0 to 14 clock cycles (0 to 11% PWM period), which enables power MOSFETs, IGBTs, and bipolar power transistors with fast speed. The trade-off between a PWM frequency and resolution is selected by choosing whether the resolution of the counter is 7-bit or 8-bit. The 20 mA output drive enables the IXDP610 to directly drive opto-isolators and smart power devices. Fast response to pulse-width commands is achieved by instantaneously changing the output to correspond to new commands. This typically eliminates the one-cycle delay with other digital PWM implementations.