HV9930

HV9930 HV9930 Hysteretic Boost-Buck (Čuk) LED Driver ICs Features Constant Output Current Steps Output Voltage Up or Down Low EMI Variable Frequency Operation Internal 8 to 200V Linear Regulator Input and output current sensing Input Current limit Enable & PWM Dimming www.DataSheet4U.com General Description The HV9930 is a variable frequency PWM controller IC designed to control an LED lamp driver using a low noise boost-buck (Cuk) topology. The HV9930 uses hystereticcurrent mode control to regulate both the input and the output currents. This enables fast transient response (required for PWM dimming) without the necessity for complex loop compensation. Input current control enables current limiting during startup and output overload conditions. Capacitive isolation protects the LED Lamp from failure of the switching MOSFET. HV9930 provides a low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100%. The HV9930 based LED driver is ideal for automotive LED lamps and RGB backlight applications with low voltage DC inputs. The HV9930 based LED Lamp drivers can achieve efficiency in excess of 80%. Applications Automotive LED Drivers RGB backlight applications Battery Powered LED Lamps Other Low Voltage AC/DC or DC/DC LED Drivers Typical Application Circuit D2 L1 C1 L2 VDC Rcs1 Rd Cd Q1 D1 Rcs2 D3 VO + Rs1 HV9930 VIN GATE CS1 Rref1 GND VDD PWMD CS2 REF Rs2a C2 Rs2b Rref2 C3 A090805 Supertex inc. · 1235 Bordeaux Drive, Sun...