Pin#7 and pin#5 are the High and Low side outputs of the IC, meaning pin#7 drives the mosfet which is connected with the supply voltage while pin#5 is responsible for driving the mosfet connected with the ground rail. The following formula can be used for determining the oscillator frequency: The resistor Rt and Ct across pin#2,3,4 is the external RC network which determine the oscillator frequency (duty cycle being fixed to 50% internally). The RC network made from RVCC and CVCC has two important functions, the resistor hleps to control the current to the internal zener while the capacitor provides a start up delay to the chip so that the outputs are able to initiate with zero logic until the built-in oscillator has begun oscillating. Pin#1 is the Vcc of the IC and is internally clamped to 15.4V for safeguarding the IC from high supply voltages. The pinout functions may be understood as follows: The figure above shows the standard circuit configuration of the proposed half bridge IC. All the the pinouts are ESD protected internally for safeguarding the chip against static voltages during packaging and handling.īasic Circuit Configuration of the IC Understanding Pinouts of the Half-Bridge Driver IC IRS2153(1)D.An internal dead time feature ensures perfect separation between the outputs for fail proof operations. IR2153 - Self Oscillating Half Bridge MOSFET Driver Chip - PDIP8.The chip also includes a Micropower start-up feature which assures guaranteed initialization even under relatively minimal voltage and current conditions.This feature can be very useful for applications where an automatic current or voltage regulation is crucial. Allows an external shut-down feature to be enforced just by adding an additional transistor stage with the IC (Non-latched shutdown on CT pin (1/6th VCC).Consists of a built-in high side driver network which allows a fail-proof conduction of the high-side mosfet (upper mosfet) with the required essential boot-strapped gate voltage.Consists of an internal built-in oscillator circuit with a 50% fixed duty cycle, while its frequency can be simply determined through two external R/C components (CT, RT programmable oscillator).The chip is designed to withstand and operate with voltages as high as 600V DC (15.4 V Zener clamp on VCC).Many of these chips have useful details in their datasheets. Such chips do all the right things and you can even choose suitable dead-time with a resistor with some of them.
Main Electrical Specificationsīefore we discuss the potential applications of this chip, let's learn a few of its main features first: If you build a MOSFET H-bridge from n-channel only MOSFETs you use appropriate drivers, such as HIP4081, or a couple of hi-side-lo-side MOSFET drivers, or 2/3rds of a FAN7388. Let's learn more about this interesting device.
The IC IRS2153(1)D which is fundamentally a half-bridge mosfet driver chip can be actually used for a number of different interesting circuit applications such as boost converters, solar compact inverters, and if two of them are coupled can be even configured as a full bridge mosfet driver circuit.