Supertex has introduced the HV9980, a new, three channel, high voltage, LED driver IC suited to both LCD and DLP television applications. The device features three channels of peak current mode control that include a switch for regulating the LED current, enabling 95% efficiency in DLP television applications. Each channel features an integrated 160 V, 25 Ω MOSFET and individual PWM and linear dimming inputs. The fast, well-controlled transient response of the HV9980 peak current mode control enables implementation of local dimming and/or scanning mode applications for LED backlights.
A large array of HV9980 ICs can be synchronised to a system clock to eliminate beat frequencies. All three channels of the IC are equipped with short-circuit and over-temperature protection.
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