MAX749CSA
₹440.00
The MAX749 generates negative LCD-bias contrast
voltages from 2V to 6V inputs. Full-scale output voltage
can be scaled to -100V or greater, and is digitally
adjustable in 64 equal steps by an internal digital-toanalog converter (DAC). Only seven small surfacemount components are required to build a complete
supply. The output voltage can also be adjusted using
a PWM signal or a potentiometer.
A unique current-limited control scheme reduces supply
current and maximizes efficiency, while a high switching
frequency (up to 500kHz) minimizes the size of external
components. Quiescent current is only 60?A max and is
reduced to under 15?A in shutdown mode. While shut
down, the MAX749 retains the voltage set point, simplifying software control. The MAX749 drives either an
external P-channel MOSFET or a PNP transistor
207 in stock (can be backordered)
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