ON Semiconductor

The FL3100T 2 A gate driver is designed to drive an N-channel enhancement-mode MOSFET in low-side switching applications by providing high peak current pulses during the short switching intervals. The FL3100T has two inputs that can be configured to operate in non-inverting (IN) mode with a DIM pin for PWM dimming control of the LED Driver. High accuracy PWM dimming control required in smart LED drivers is possible by adjusting the duty ratio of the DIM input. If one or both inputs are left unconnected, internal resistors bias the inputs such that the output is pulled LOW to hold the power MOSFET off.The driver is available with fixed TTL input thresholds. Internal circuitry provides an under-voltage lockout function by holding the output LOW until the supply voltage is within operating range. The FL3100T delivers fast MOSFET switching performance, which helps maximize efficiency in high-frequency LED driver designs.The FL3100T is available in a 5-pin, SOT23 or a 2 x 2 mm, 6-lead, Molded Leadless Package (MLP) for the smallest size with excellent thermal performance.

The FL5150 and FL5160 are controllers for varying the pulse width for AC loads. The FL5150 is for 50 Hz and the FL5160 is for 60 Hz applications. The FL5150/60 is powered from the AC line and generates a programmable gate drive for controlling the pulse width for external IGBT or MOSFET transistors. The pulse width can be user programmable with either an external resistor or 0 to 10 V DC signal or controlled by a µP with a logic signal. The pulse width can be controlled from 0 to 100% duty cycle to provide a wide AC symmetric dimming control function when biased with a 3-wire application. For 2-wire Line-Hot and Load-Hot applications, the pulse width can typically be varied from 0 to a maximum gate pulse so that the load voltage is >95% of the AC line voltage. The FL5150/60 will automatically override the pulse width control setting to allow maximum gate pulse width without flicker.The FL5150/60 takes advantage of the UL1472 2015 2nd edition code revision that allows for up to 0.5 mA of ground leakage current when a neutal wire is not available in the switch box. This improves the ficker performance for non-resistive loads. If the application does not allow ground leakage current then the Line Hot signal can be used as the ZC signal.The FL5150/60 has user programmable over-current and temperature protection. With external sense resistors, the maximum voltage drop across Q1 and Q2 can be set to limit the maximum current and transistor power dissipation.The FL5150/60 can be programmed for trailing edge dimming when the DIM Mode pin is low at startup (pulse width starts at the zero-crossing) or leadig edge dimming when the DIM Mode pin is connected to the VDD pin at startup (pulse width ends at the zero crossing). When an OFF state is selected (DIM Control pin is 0 V) the FL5150/60 will go into a low power electronic OFF state that reduces the power consumption to less than 100mW if an external NPN transistor is used.The FL5150/60 has an internal 8 bit ADC that allows for typically 226 selectable dimming pulse widths with a resolution of 25 µs per step. The FL5150/60 controls the dim pulse width rate of change so that the minimum to maximum dim ramp time is approximately 1 second. This feature allows for a smooth dim transition.Internally, the FL5150/60 contains a 17 V shunt regulator, 5 V linear regulator, 8Bit ADC, detection comparators, control logic and an IGBT or MOSFET gate driver.The 10-pin SOIC package provides for a low-cost, compact design and layout.

This highly integrated PWM controller, FL6630, provides several features to enhance the performance of single-stage flyback converters. The proprietary topology, TRUECURRENT®, enables the simplified circuit design for LED lighting applications.TRIAC dimming is smoothly managed by dimming brightness control without flicker. By using single-stage topology with primary-side regulation, an LED lighting board can be implemented with few external components and minimized cost. It does not require an input bulk capacitor or feedback circuitry. To implement good power factor and low total harmonic distortion, constant on-time control is utilized with an external capacitor connected to the COMI pin.Precise constant-current control regulates accurate output current versus changes in input voltage and output voltage. The operating frequency is proportionally changed by the output voltage to guarantee Discontinuous Conduction Mode (DCM) operation with higher efficiency and simpler design. The FL6630 provides protections such as open-LED, short-LED, and over-temperature protections. Current-limit level is automatically reduced to minimize output current and protect external components in a short-LED condition.The FL6630 controller is available in an 8-pin Small Outline Package (SOP).

The FL6961 is general lighting power controller for low to high power lumens applications requiring power factor correction. It is designed for flyback, or boost converter operating in boundary-mode. The FL6961 provides a controlled on-time to regulate the output DC voltage and achieve natural power factor correction. The maximum on-time of the external switch is programmable to ensure safe operation during AC brownouts. An innovative multi-vector error amplifier is built in to provide rapid transient response and precise output voltage clamping. A built-in circuit disables the controller if the output feedback loop is opened. The startup current is lower than 20µA and the operating current has been reduced to under 6mA. The supply voltage can be up to 25V, maximizing application flexibility.