ON Semiconductor

The FAN5776 is a synchronous, constant-current LED driver capable of efficiently driving up to ten LEDs in a five-string, two-series LEDs per string configuration. Optimized for small form-factor applications, the 1.8 MHz switching frequency allows the use of tiny chip inductors and capacitors.For safety, the device features integrated over-voltage, short-circuit, and thermal shutdown protections. In addition, input under-voltage lockout protection is triggered if the battery voltage is too low.The FAN5776 is comprised of low-dropout, high-side current sources, enabling a high efficiency delivery of power from the battery to the LEDs. The LED current control is established with a series RSETresistor, which is connected between the internal voltage reference on the chip and ground.During operation, FAN5776 holds the boost regulator’s voltage on COUTduring the off cycle of the PWM dimming, which helps minimize audible noise.

The FAN5904 is a high-efficiency, low-noise, synchronous, step-down, DC-DC converter optimized for powering Radio Frequency (RF) Power Amplifiers (PAs) in handsets and other mobile applications. In High-Power Mode, GSM Tx power is enabled. In Low-Power Mode, up to 3.0W is supported, enabling up to 29dBm output power for 3G/3.5G and 4G platforms.The output voltage may be dynamically adjusted from 0.40V to 3.50V, proportional to an analog input voltage VCONranging from 0.16V to 1.40V, optimizing power-added efficiency. Fast transition times of less than 10µs are achieved, allowing excellent inter-slot settling.An integrated bypass FET is automatically enabled when the battery voltage and voltage drop across the DC-DC PMOS device are within a set voltage range of the desired output voltage (VOUT= VBAT- VPMOS- VBP_TH). This dynamic bypass feature enables the FAN5904 to support heavy load currents under the most stringent VSWR conditions while maintaining high efficiency and superior spectral performance. The bypass FET may also be enabled by providing a VCONvoltage nominally greater than or equal to 1.5V or by driving BPEN HIGH.The FAN5904 operates in PWM Mode with a 6MHz switching frequency in Low-Power Mode and at 3MHz in High-Power Mode, which limits high-frequency spur levels. It uses a single, small form factor inductor of 470nH. In addition, PFM operation is allowed in Low-Power Mode to improve efficiency at low load currents.The FAN5904UC00X option allows PFM Mode only when VOUTis less than 1V, while the FAN5904UC01X permits PFM Mode at higher voltages for applications that can tolerate larger output ripple and that demand optimal low-to-moderate load current efficiency.

The FAN5909 is a high-efficiency, low-noise, synchronous, step-down, DC-DC converter optimized for powering Radio Frequency (RF) Power Amplifiers (PAs) in handsets and other mobile applications. Load currents up to 2.5 A are allowed, which enables GSM / EDGE, 3 G/3.5 G, and 4G platforms under very poor VSWR conditions.The output voltage may be dynamically adjusted from 0.40 V to 3.60 V, proportional to an analog input voltage VCONranging from 0.16 V to 1.44 V, optimizing power added efficiency. Fast transition times of less than 6 µs are achieved, allowing excellent inter-slot settling.An integrated LDO is automatically enabled under heavy load conditions or when the battery voltage and voltage drop across the DC-DC PMOS device are within a set range of the desired output voltage. This LDO assist feature supports heavy load currents under the most stringent battery and VSWR conditions while maintaining high efficiency, low dropout, and superior spectral performance.The FAN5909 DC-DC operates in PWM Mode with a 2.9 MHz switching frequency and supports a single, smallform-factor inductor ranging from 1.0 µH to 2.2 µH. In addition, PFM operation is allowed at low load currents for output voltages below 1.5 V to maximize efficiency. PFM operation can be disabled by setting MODE pin to LOW.When output regulation is not required, the FAN5909 may be placed in Sleep Mode by setting VCONbelow 100 mV nominally. This ensures a very low IQ(<50 μA) while enabling a fast return to output regulation.FAN5909 is available in a low profile, small form factor, 16 bump, Wafer-Level Chip-Scale Package (WLCSP) that is 1.61 mm x 1.61 mm. Only three external components are required: two 0402 capacitors and one 2016 inductor.

The FAN5910 is a high efficiency, low noise, synchronous, step down, DC-DC converter optimized for powering Radio Frequency (RF) Power Amplifiers (PAs) in handsets and other mobile applications. Load currents up to 2.5A are allowed, which enables GSM / EDGE, 3G/3.5G, and 4G platforms under very poor VSWR conditions. The output voltage may be dynamically adjusted from 0.40 V to 3.60 V, proportional to an analog input voltage VCON ranging from 0.16 V to 1.44 V, optimizing power−added efficiency. Fast transition times are achieved, allowing excellent inter−slot settling.An integrated LDO is automatically enabled under heavy load conditions or when the battery voltage and voltage drop across the DC−DC PMOS device are within a set range of the desired output voltage. This LDO−assist feature supports heavy load currents under the most stringent battery and VSWR conditions while maintaining high efficiency, low dropout, and superior spectral performance.The FAN5910 DC−DC operates in PWM Mode with a 2.9 MHz switching frequency and supports a single, small form−factor inductor ranging from 1.0 µH to 2.2 µH. In addition, PFM operation is allowed at low load currents for output voltages below 1.5 V to maximize efficiency. PFM operation can be disabled by setting MODE pin to LOW.When output regulation is not required, the FAN5910 may be placed in Sleep Mode by setting VCON below 100 mV nominally. This ensures a very low IQ (<50 µA) while enabling a fast return to output regulation.FAN5910 is available in a low profile, small form factor, 16 bump, Wafer−Level Chip−Scale Package (WLCSP) that is 1.615 mm x 1.615 mm. Only three external components are required: two 0402 capacitors and one 2016 inductor.

The FAN604H is an advanced PWM controller aimed at achieving power density of ≥10W/in3 in universal input range AC/DC flyback isolated power supplies. It incorporates Quasi-Resonant (QR) control with proprietary Valley Switching with a limited frequency variation. QR switching provides high efficiency by reducing switching losses while Valley Switching with a limited frequency variation bounds the frequency band to overcome the inherent limitation of QR switching. FAN604H features mWSaver® burst mode operation with extremely low operating current (300 μA) and significantly reduces standby power consumption to meet the most stringent efficiency regulations such as Energy Star’s 5-Star Level and CoC Tier II specifications.FAN604H includes several user configurable features aimed at optimizing efficiency, EMI and protections. FAN604H has a wide blanking frequency range that improves light load efficiency and eliminating audio noise for adaptive application. It incorporates user-configurable constant current reference, which allows controlling the maximum output current from primary-side, thereby optimizing transformer design to improve the overall efficiency. It also includes several rich programmable protection features such as over-voltage protection (OVP), precise constant output current regulation (CC).

The FAN6080HMX is an advanced PWM controller aimed at achieving power density of ≥10 W/in3 in universal input range AC/DC flyback isolated power supplies. It incorporates Quasi−Resonant (QR) control with proprietary valley switching. QR switching provides high efficiency by reducing switching losses.FAN6080HMX features MWSAVER® burst mode operation with extremely low operating current (300 A) and significantly reduces standby power consumption to meet the most stringent efficiency regulations such as Energy Star’s 5−Star Level and CoC Tier II specifications.FAN6080HMX includes several features aimed at optimizing efficiency, EMI and protections. FAN6080HMX has a wide blanking frequency range that improves light load efficiency. The maximum operating frequency is optimized to minimize components temperature while maximizing the full load efficiency. The minimum peak current is also set to optimize to balance the standby power consumption and the audio noise. It also includes several rich programmable protection features such as over−voltage protection(OVP) and precise constant output current regulation (CC).FAN6080HMX is available in SOIC8 package.