CS4124

Features:

·150mA Peak PWM Gate Drive Output
·Patented Voltage Compensation Circuit
·100% Duty Cycle Capability
·5V, ± 3% Linear Regulator
·Low Current Sleep Mode
·Overvoltage Protection
·Boost Mode Power Supply
·Output Inhibit Package


Specifications

Storage Temperature ..........................................................................................................-65°C to 150°C
VCC .............................................................................................................................................-0.3V to 30V
VCC Peak Transient Voltage (load dump = 26V w/series 10 resistor) ....................................................40V
Input Voltage Range (at any input) .............................................................................................-0.3V to 10V
Maximum Junction Temperature ...........................................................................................................150°C
Lead Temperature Soldering Wave Solder (through hole styles only) ....................10 sec. max, 260°C peak
ESD Capability (Human Body Model) ..........................................................................................................2kV


Description

The CS4124 is a monolithic integrated circuit designed primarily to control the rotor speed of permanent magnet, direct current (DC) brush motors. It drives the gate of an N channel power MOSFET or IGBT with a user-adjustable, fixed frequency, variable duty cycle, pulse width modulated (PWM) signal. The CS4124 can also be used to control other loads such as incandescent bulbs and solenoids. Inductive current from the motor or solenoid is recirculated through an external diode.

The CS4124 accepts a DC level input signal of 0 to 5V to control the pulse width of the output signal. This signal can be generated by a potentiometer referenced to the onchip 5V linear regulator, or a filtered 0% to 100% PWM signal also referenced to the 5V regulator.

The IC CS4124 is placed in a sleep state by pulling the CTL lead below 0.5V. In this mode everything on the chip is shutdown except for the on-chip regulator and the overall current draw is less than 275A. There are a number of on-chip diagnostics that look for potential failure modes and can disable the external power MOSFET.