A highly integrated PWM controller with power MOSFET that provides features to enhance the performance of low-power flyback converters. The proprietary topology enables simplified design for LED lighting applications. By using the single-stage topology with primary-side regulation, an LED lighting board can be implemented with the few external components and minimized cost; requiring no input bulk capacitor or feedback circuitry.

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A simple IC with PFC function, the special 'adopted digital' technique of the IC can automatically detect input voltage condition and send an internal reference signal for achieving high power factor. When AC input is applied to the IC, PFC function is automatically enabled. Otherwise, when DC input is applied to the IC, PFC function is automatically disabled. Does not need a bulk capacitor (electrolytic) for supply rail stability, which can significantly affect the LED lamp system.

Datasheet

7.55W Ref. Design

2.52W Ref. Design

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App. Note AN-9744

App. Note AN-7701

A highly integrated PWM controller provides several features to enhance the performance of single-stage flyback converters. TRUECURRENT™, Fairchild's proprietary topology, enables the simplified circuit design for LED lighting applications. Dimming brightness control smoothly manages TRIAC dimming without flicker. Does not require an input bulk capacitor or feedback circuitry and constant on-time control is utilized with an external capacitor connected to the COMI pin.

90-140VAC Ref. Design

180-265VAC Ref. Design

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App. Note AN-9745

App. Note AN-7730

A highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. By using a proprietary, single-stage topology with primary-side regulation, a LED lighting board can be implemented with few external components and minimized cost. No input bulk capacitor or feedback circuitry is required. To implement good power factor and low THD, 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 adjusted by the output voltage to guarantee DCM operation with higher efficiency and simpler design. FL7732 provides open-LED, short-LED, and over-temperature protection features. The current limit level is automatically reduced to minimize output current and protect external components in a short-LED condition.

Datasheet

8.4W Ref. Design

16.8W Ref. Design

App. Note AN-9750

App. Note AN-7732

This third-generation Primary Side Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. TRUECURRENT™, Fairchild's proprietary topology, enables precise CC regulation and simplified circuit design for battery-charger applications. A low-cost, smaller, and lighter charger results, as compared to a conventional design or a linear transformer. Green mode minimizes standby power consumption.

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Datasheet

4.2W FSEZ1317MY Ref. Design

6W FSEZ1317NY Ref. Design

App. Note AN-9735

This is a simple IC with integrated MOSFET and PFC function. The special adopted digital technique automatically detects input voltage condition and sends an internal reference signal to achieve high power factor. When AC input is applied to the IC, the PFC function is automatically enabled. When DC input is applied to the IC, the PFC function is automatically disabled. The FLS0116 does not need a bulk (electrolytic) capacitor for supply rail stability, which significantly improves LED lamp life.

An active PFC controller for low-to-high power lumens applications that operate in Critical Conduction Mode (CRM). The voltage-mode PWM compares an internal ramp signal with the error amplifier output to generate a MOSFET turn-off signal and because it does not need rectified AC line voltage information, it saves the power loss of an input voltage sensing network necessary for a current-mode CRM PFC controller. Provides protections for over-voltage, open-feedback, over-current, input-voltage-absent detection, and under-voltage lockout.

Datasheet

100W Ref. Design

160W Ref. Design

App. Note AN-9731

App. Note AN-9732

App. Note AN-9738

Includes highly integrated power switches for medium- to high-power lumens applications. Offering everything necessary to build a reliable and robust half-bridge resonant converter, this IC simplifies designs while improving productivity and performance. The FLS-XS series combines power MOSFETs with fast recovery type body diodes, a high-side gate-drive circuit, an accurate current controlled oscillator, frequency limit circuit, soft-start, and built-in protection functions. The high-side gate-drive circuit has common-mode noise cancellation capability, which guarantees stable operation with excellent noise immunity. The fast recovery body diode of the MOSFETs improves reliability against abnormal operation conditions, while minimizing the effect of reverse recovery. Using zero voltage switching (ZVS) dramatically reduces the switching losses and significantly improves efficiency. ZVS also reduces switching noise noticeably, which allows a small sized Electromagnetic Interference (EMI) filter. The FLS-XS series can be applied to resonant converter topologies such as series resonant, parallel resonant, and LLC resonant converters.

Datasheet

100W Ref. Design

160W Ref. Design

App. Note AN-9729

App. Note AN-9730

An LED current-balance controller that controls 4-LED arrays to maintain equal LED current. With a high withstanding voltage, it is suitable for edge-type LED BLU and LED lighting. To minimize components between primary to secondary, the FAN7346 generates a new integrated feedback signal. Provides protections for over-voltage, open-LED, heat, and drain-source voltage of the regulating switch, as well as individual string protection. LED brightness can be linearly varied up to LED current by applying an external Pulse Width modulated (PWM) signal to the PWM pin.

Datasheet

100W Ref. Design

160W Ref. Design

App. Note AN-9729

App. Note AN-9730

The FAN5340 is a synchronous constant-current LED driver capable of efficiently delivering up to 500mW to a string of up to four LEDs in series. Optimized for small form-factor applications, the 1.2MHz fixed switching frequency allows the use of chip inductors and capacitors. For safety, the device features integrated short-circuit detection plus over-voltage and thermal shutdown protections. In addition, input under-voltage lockout protection is triggered if the battery voltage is low. Brightness (dimming) control is implemented by applying a PWM signal of 300Hz to 1kHz on the EN pin. During shutdown, the FAN5340 disconnects the LED anodes from the output of the boost regulator, which holds the boost regulator's voltage on COUT, reducing audible noise from the PWM dimming, and removing power from the LED string.

Datasheet

The FAN5343 is an asynchronous constant-current LED driver capable of efficiently delivering up to 500mW to a string of six (6) LEDs in series. Optimized for small form factor applications, the 1.2MHz fixed switching frequency allows the use of small chip inductors and capacitors. The FAN5343 uses a single-wire digital control interface to program the brightness levels of the LEDs in 32 linear steps by applying digital pulses. For safety, the device features integrated over-voltage, overcurrent, short circuit detection, and thermal shutdown protection. In addition, input under-voltage lockout protection is triggered if the battery voltage is too low. The FAN5343 is available in a very low profile, small form factor 2mm x 2mm x 0.55mm 6-lead UMLP package that is green and RoHS compliant.

Datasheet

Two-, four-, and six-channel current-sink linear LED drivers are used to backlight the main LCD displays or keypads in mobile electroncis, such as cellular phone handsets. A very low dropout of 50mV allows driving LEDs without any inductors or switch capacitors. The brightness levels of the LED outputs are programmed through a single-wire digital control interface that allows programming of 32 linear dimming steps and turn on/off by applying digital pulses. Provides high efficiency due to the low drop-out voltage and good matching between different channels of LED output across the entire 32 dimming steps, as well as integrate short circuit, under-voltage, and thermal protection to ensure a more robust solution.

Datasheet

The FAN5646 is a flexible and compact solution for a blinking or "breathing" LED indicator. The internal programmable blink algorithm eliminates any need for continual system processor control. This means longer battery life for a hand-held system because the system processor is not awakened from sleep mode to blink an LED. Very low dropout of 80mV allows driving an LED without any inductors or switch capacitors. LED blink rate, rise and fall time, and CTRL line behavior can be programmed by a TinyWire single-wire digital interface. The on-time and time between pulses can be set for up to two different pulse widths.The default for FAN5646 option 01 is "follow" mode, where the LED turns on with the programmed rise time, then stays on as long as CTRL remains HIGH. When CTRL falls, the LED turns off at the programmed fall time. For option 00; when CTRL is HIGH continuously, the LED repeats the programmed pattern.

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Datasheet

The FAN5701 is a highly integrated and efficient chargepump-based multi-LED driver. The device can drive up to six LEDs in parallel with a total output current of 180mA. The FAN5701 is capable of driving a primary display backlight requiring four to six LEDs. When more than four LEDs are needed for backlighting, the FAN5701's two PWM dimming inputs can be connected together to provide the proper dimming control for all six LEDs. When a primary and sub-display is needed, the FAN5701 can be controlled such that each group can be dimmed independently. For candybar phones requiring a primary display and simple keypad lighting, the FAN5701 offers a simple and compact lighting solution. Regulated internal current sinks deliver excellent current and brightness matching to all six LEDs. The device provides excellent efficiency without an inductor by operating the charge pump in 1.5x or pass-through modes. The FAN5701 can be ordered with default ISET values of 30mA, 20mA, 15mA, or 8mA and available in WLCSP or ultra-thin UMLP package types. The default ISET is always determined by the part number purchased.

Datasheet

The FAN5702 is a highly integrated and configurable charge chargepump- based multi-LED driver. The device can drive up to six LEDs in parallel with a total output current of 180mA. Regulated internal current sinks deliver excellent current and brightness matching to all LEDs. The FAN5702 has an I²C interface that allows the user to independently control the brightness with a default grouping of 2,1,1,1,1 for a maximum of five independent lighting channels. The LED driver can be programmed in a multitude of configurations to address broad lighting requirements for different platforms. Each LED can be configured through I²C as five independent channels (Group A has two LEDs by default) or any additional LEDs can join Group A to increase the backlighting needs as the display size increases. The device offers a second dimming control using the EN/PWM pin. Applying a PWM dimming signal to this pin allows control of the dimming of Group A LEDs so that the average current is the linear value multiplied by the PWM dimming duty-cycle. The device provides excellent efficiency, without an inductor, by operating the charge pump in 1.5x or pass-through mode. The FAN5702 can be ordered with default ISET values of 30mA, 20mA, 15mA, or 8mA. The default ISET is always determined by the ISET ordered.

Datasheet