FAN5330 FAIRCHILD | Alldatasheet
Document overview
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Technical content
Features
1.5MHz Switching Frequency Low Noise Adjustable Output Voltage 0.7W Output Power Capability Low Shutdown Current: <1µA Cycle-by-Cycle Current Limit Low Feedback Voltage (110mV) Over-Voltage Protection Fixed-Frequency PWM Operation Internal Compensation Thermal Shutdown 5-Lead SOT23 Package
Applications
Description
The FAN5330 is an LED driver that features fixed frequency mode operation and an integrated FET switch. This device is designed to operate at high switching frequencies in order to minimize switching noise measured at the battery terminal of hand-held communications equipment. Quiescent current in both normal and shutdown mode is designed to be minimal in order to extend battery life. Normal or shutdown mode can be selected by a logic level shutdown circuitry. The low ON-resistance of the internal N-channel switch ensures high efficiency and low power dissipation. A cycle-by-cycle cur- rent limit circuit keeps the peak current of the switch below a typical value of 1.5A. The FAN5330 is available in a 5-lead SOT23 package. Typical Application Figure 1. Typical Application Diagram
Figure 2. Pin Assignment
2 GND
Feedback node that connects to an external current set resistor.
4 SHDN
Logic HIGH enables, logic LOW disables the device.
www.fairchildsemi.com FAN5330 Rev. 1.0.1 FAN5330 High Efficiency Serial LED Driver with 30V Integrated Switch Absolute Maximum Ratings Note1) Recommended Operating Conditions Notes: 1. Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Absolute maximum ratings apply individually only, not in combination. 2. Using EIA/JESD22A114B (Human Body Model) and EIA/JESD22C101-A (Charge Device Model). 3. This load capacitance value is required for the loop stability. Tolerance, temperature variation, and voltage dependency of t he capacitance must be considered. Typically a 0.47µF ceramic capacitor is required to achieve specified value at V OUT = 30V. Parameter Min. Max. Unit V IN to GND 6.0 V FB, SHDN to GND -0.3 V IN + 0.3 V SW to GND -0.3 35 V Lead Soldering Temperature (10 seconds) 300 °C Junction Temperature 150 °C Storage Temperature -55 150 °C Thermal Resistance ( Θ JA ) 210 °C/W Electrostatic Discharge Protection (ESD) Level (Note 2) HBM 2 KV CDM 1 Parameter Min. Typ. Max. Unit Input Voltage 1.8 5.5 V Output Voltage V IN 30 V Operating Ambient Temperature -40 25 85 °C Output Capacitance Rated at the Required Output (Note 3) 0.1 µF
www.fairchildsemi.com FAN5330 Rev. 1.0.1 FAN5330 High Efficiency Serial LED Driver with 30V Integrated Switch
Electrical Characteristics
Figure 3. Test Circuit
www.fairchildsemi.com FAN5330 Rev. 1.0.1 FAN5330 High Efficiency Serial LED Driver with 30V Integrated Switch Typical Performance Characteristics T A = 25°C, C IN = 4.7µF , C OUT = 0.47µF , L = 10µH, unless otherwise noted. -40 -20 0 2 04 06 08 0 9.6 9.8 10.0 10.2 10.4 10.6 10.8 LED Current vs Temperature LED Current (mA) VIN = 2.2V VIN = 3.6V VIN = 5.5V VOUT = 15V -40 -20 0 2 04 06 08 0 1.2 1.4 1.6 1.8 2.0 SW Frequency vs. Temperature Temperature (°C) SW Frequency (MHz) VIN = 2.2V VOUT = 15V VIN = 3.6V VIN = 5.5V 2345 VOUT = 15V Load Current vs. Input Voltage Input Voltage (V) Load Current (mA) Start-Up Response Time (100µs/div) (5V/div) Voltage Output Voltage Battery Current (5V/div)(0.5A/div) EN L = 10µH CIN = 10µF COUT = 1µF VIN = 2.7V 100 100 Input Voltage (V) Efficiency (%) ILED = 10mA VOUT = 9V ILED = 20mA ILED = 30mA ILED = 35mA Efficiency vs. Input Voltage Input Voltage (V) Efficiency (%) VOUT = 15V ILED = 20mA ILED = 30mA ILED = 35mA ILED = 10mA Efficiency vs. Input Voltage
Figure 4. Block Diagram sense resistor connected in series with the N-channel switch. turns off the switch instantaneously within each clock cycle. sistor, thus preventing the output voltage from going higher. non-destructive breakdown and the IC survives.
www.fairchildsemi.com FAN5330 Rev. 1.0.1 FAN5330 High Efficiency Serial LED Driver with 30V Integrated Switch 3. Dimming Using Filtered PWM Signal This method allows the use of a greater than 1kHz PWM fre- quency signal with minimum impact on the battery ripple. The filtered PWM signal Table 8 on page 8 acts as an adjustable DC voltage as long as its frequency is significantly higher than the corner frequency of the RC low pass filter. Figure 8. Dimming Using Filtered PWM Signal Thermal Shutdown When the die temperature exceeds 150°C, a reset occurs and will remain in effect until the die cools to 130°C, at that time the circuit will be allowed to restart. PCB Layout Recommendations The inherently high peak currents and switching frequency of power supplies require careful PCB layout design. Therefore, use wide traces for high current paths and place the input capacitor, the inductor, and the output capacitor as close as possible to the integrated circuit terminals. The FB pin connec- tion should be routed away from the inductor proximity to pre- vent RF coupling. A PCB with at least one ground plane connected to pin 2 of the IC is recommended. This ground plane acts as an electromagnetic shield to reduce EMI and parasitic coupling between components. FB 20KΩ 15KΩ 5Ω 1.6KΩ FAN5330 0.1µF
9 www.fairchildsemi.com FAN5330 Rev. 1.0.1 FAN5330 High Efficiency Serial LED Driver with 30V Integrated Switch Mechanical Dimensions 5-Lead SOT-23
Ordering Information
Symbol Inches Millimeters Notes Min Max Min Max A .035 .057 .90 1.45 A1 .000 .006 .00 .15 B .008 .020 .20 .50 c .003 .010 .08 .25 D .106 .122 2.70 3.10 E .059 .071 1.50 1.80 e .037 BSC .95 BSC e1 .075 BSC 1.90 BSC H .087 .126 2.20 3.20 L .004 .024 .10 .60 0º 10º 0º 10º Product Number Package Type Order Code FAN5330 5-Lead SOT23 FAN5330SX D e B E H A α L c α
10 www.fairchildsemi.com FAN5330 Rev. 1.0.1 FAN5330 High Efficiency Serial LED Driver with 30V Integrated Switch DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY , FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Preliminary No Identification Needed Obsolete This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Formative or In Design First Production Full Production Not In Production ISOPLANAR™ LittleFET™ MICROCOUPLER™ MicroFET™ MicroPak™ MICROWIRE™ MSX™ MSXPro™ OCX™ OCXPro™ OPTOLOGIC OPTOPLANAR™ PACMAN™ POP™ Power247™ PowerEdge™ FAST FASTr™ FPS™ FRFET™ GlobalOptoisolator™ GTO™ HiSeC™ I 2C™ i-Lo™ ImpliedDisconnect™ IntelliMAX™ Rev. I16 ACEx™ ActiveArray™ Bottomless™ Build it Now™ CoolFET™ CROSSVOLT™ DOME™ EcoSPARK™ E 2CMOS™ EnSigna™ FACT™ FACT Quiet Series™ PowerSaver™ PowerTrench QFET QS™ QT Optoelectronics™ Quiet Series™ RapidConfigure™ RapidConnect™ µSerDes™ SILENT SWITCHER SMART START™ SPM™ Stealth™ SuperFET™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 SyncFET™ TinyLogic TINYOPTO™ TruTranslation™ UHC™ UltraFET UniFET™ VCX™ Wire™ Across the board. Around the world.™ The Power Franchise Programmable Active Droop™