FP8013XR-G1

FP8013 5V, 3A, 1.5MHz Buck Constant Current Switching Regulator for White LED General Description The FP8013 is a PWM control buck converter designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.1V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. The FP8013 includes both high low side switch to realize high efficiency and compact PCB layout. To extend battery life for portable application, 100% duty cycle is supported for low-dropout operation. Other features include thermal shutdown, cycle-by cycle current limit and over current protection Features  Input Voltage Range: 2.5 to 5.5V  Adjustable Output Voltage From 0.1V to VIN  Precision Feedback Reference Voltage: 0.1V (±10%)  Output Current: 3A (Max.)  Duty Cycle: 0~100%  Internal Fixed PWM Frequency: 1.5MHz  Low Quiescent Current: 100μA  No Schottky Diode Required  Built-in Soft Start  Current Mode Operation  Over Temperature Protection  Package: SOP-8L (EP) Applications  LED Drivers Typical Application Circuit VIN sw VCC AVcc FP8013 FB EN GND This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 1/12 FP8013 Function Block Diagram EN Vcc AVcc OSC OSC Enable / UVLO 1V VREF Slope Comp + Error Amp. - FB / VOUT + 6 Current Comp. + S Q R Q Switching Control Logic Anti ShootThru SW SR Latch + Current Sensing Reverse Current Detector - GND Pin Descriptions SOP-8L (EP) Top View Name 1 8 NC VCC 2 7 NC AVCC 3 6 SW FB / VOUT 4 FP8013 9Fa-86L EN 5 Bottom View GND No. I / O Description EN 1 I Enable / UVLO VCC 2 P Supply Voltage AVCC 3 P Analog Supply Voltage FB / VOUT 4 I Feedback GND 5 P Ground SW 6 O Switch NC 7 NA Not connected NC 8 NA Not connected EP 9 P Exposed PAD - Must connect to Ground EP This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 2/12 FP8013 Marking Information SOP-8L (EP) FP8013 - Halogen Free Lot Number Internal ID Per - Half Month Year Halogen Free: Halogen free product indicator Lot Number: Wafer lot number’s last two digits For Example: 132386TB  86 Internal ID: Internal Identification Code Per-Half Month: Production period indicated in half month time unit For Example: January → A (Front Half Month), B (Last Half Month) February → C (Front Half Month), D (Last Half Month) Year: Production year’s last digit This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 3/12 FP8013 Ordering Information Part Number Operating Temperature Package MOQ Description -40°C ~ +85°C SOP-8L (EP) 2500EA Tape & Reel FP8013XR-G1 Absolute Maximum Ratings Max. Unit -0.3 6 V -0.3 VIN V P-Channel Switch Source Current (DC) 3.9 A N-Channel Switch Source Current (DC) 3.9 A 6 A Parameter Input Supply Voltage Symbol Conditions VIN EN, VFB, SW Voltage Min. Peak SW Switch Sink and Source Current (AC) Typ. Thermal Resistance (Junction to Ambient) θJA SOP-8L(EP) +50 °C / W Thermal Resistance (Junction to Case) θJC SOP-8L(EP) +10 °C / W +150 °C +150 °C +260 °C Junction Temperature Storage Temperature -65 Lead Temperature (soldering, 10 sec) Suggested IR Re-flow Soldering Curve This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 4/12 FP8013 Recommended Operating Conditions Parameter Symbol Supply Voltage Conditions VIN Operating Temperature Min. Typ. Max. Unit 2.5 5.5 V -40 +85 °C DC Electrical Characteristics (VIN=3.6V ,TA= 25°C , unless otherwise noted) Parameter Min. Typ. Max. Unit TA=25°C 0.09 0.1 0.11 V -40°C~+85°C 0.085 0.1 0.115 V Symbol Conditions Regulated Feedback Voltage VFB Line Regulation with VREF VFB VIN=2.5V to 5.5V 0.04 0.4 /V Output Voltage LineRegulation VOUT VIN=2.5 to 5.5V 0.04 0.4 %/V RDS (ON) of P-Channel FET RDS (ON) P ISW=100mA 60 90 mΩ RDS (ON) of N-Channel FET RDS(ON) N ISW =-100mA 60 90 mΩ ±0.01 ±1 µA 5 6 A SW Leakage ILSW VEN=0V, VIN=5V Peak Inductor Current IPK VFB=0.08V 3.75 Input Voltage Range VIN -40°C~+85°C 2.5 Quiescent Current ICC 5.5 V 1 µA Shutdown, VEN=0V 0.1 Active, VFB=0.08V, VEN=VIN 100 µA Active, VFB=0.12V, VEN=VIN 80 µA EN Threshold VEN -40°C~ +85°C EN Leakage Current IEN -40°C ~+85°C Oscillator Frequency FOSC VFB=0.1V, -40°C ~+85°C 0.3 1.2 1 1.5 V ±0.01 ±1 µA 1.5 1.8 MHz This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 5/12 FP8013 Function Description Control Loop The FP8013 is a high efficiency current mode synchronous buck regulator. Both the main (P-channel MOSFET) and synchronous (N-channel MOSFET) switches are built internally. With current mode operation, the PWM duty is controlled both by the error amplifier output and the peak inductor current. At the beginning of each cycle, the oscillator turn on the P-MOSFET switch to source current from VIN to SW output. error amplifier output. Then, the chip starts to compare the inductor current with the Once the inductor current is larger than the error amplifier output, the P-MOSFET switch is turned off. When the load current increases, the feedback voltage FB will slightly drop. This causes the error amplifier to output a higher current level until the prior mentioned peak inductor current reach the same level. The output voltage then can be sustained at the same. When the top P-MOSFET switch is off, the bottom synchronous N-MOSFET switch is turned on. Once the inductor current reverses, both top and bottom MOSFET will be turn off to leave the SW pin into high impedance state. The FP8013’s current mode control loop also includes slope compensation to suppress sub-harmonic oscillations at high duty cycles. This slope compensation is achieved by adding a compensation ramp to the inductor current signal. LDO Mode The FP8013’s maximum duty cycle can reach 100%. turn on through out whole clock cycle. controls the output voltage. That means the driver’s main switch is Once the duty reaches 100%, the feedback path no longer The output voltage will be the input voltage minus the main switch voltage drop. Over Current Protection FP8013 limits the peak main switch current cycle by cycle. When over current occurs, chip will turn off the main switch and turn the synchronous switch on until next cycle. Thermal Protection FP8013 will shutdown automatically when the internal junction temperature reaches 150℃ to protect both the part and the system. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 6/12 FP8013 Application Information Input capacitor Selection The input capacitor must be connected to the VIN pin and GND pin of FP8013 to maintain steady input voltage and filter out the pulsing input current. The voltage rating of input capacitor must be greater than maximum input voltage plus ripple voltage. In switch mode, the input current is discontinuous in a buck converter. The source current waveform of the high-side MOSFET is a square wave. To prevent large voltage transients, a low ESR input capacitor sized for the maximum RMS current must be used. The RMS value of input capacitor current can be calculated by: IRMS  IO _ MAX VO VIN  V  1  O  VIN   It can be seen that when VO is half of VIN, CIN is under the worst current stress. The worst current stress on CIN is IO_MAX/2. Inductor Selection The value of the inductor is selected based on the desired ripple current. Large inductance gives low inductor ripple current and small inductance result in high ripple current. However, the larger value inductor has a larger physical size, higher series resistance, and/or lower saturation current. In experience, the value is to allow the peak-to-peak ripple current in the inductor to be 10%~20% maximum load current. The inductance value can be calculated by: L ( VIN  VO ) VO ( VIN  VO ) VO  f  IL VIN f  2  (10% ~ 20%)IO  VIN The inductor ripple current can be calculated by: IL  VO  V   1  O  f  L  VIN  Choose an inductor that does not saturate under the worst-case load conditions, which is the load current plus half the peak-to-peak inductor ripple current, even at the highest operating temperature. The peak inductor current is: IL _ P E A K IO  IL 2 The inductors in different shape and style are available from manufacturers. Shielded inductors are small and radiate less EMI issue. But they cost more than unshielded inductors. The choice depends on EMI requirement, price and size. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 7/12 FP8013 Inductor Value (µH) Dimensions (mm) Component Supplier Model 1.0 8.3×8.3×4.5 FENG-JUI TPRH8D43-2R2M 1.0 10.3×10.3×4.0 FENG-JUI TPRH10D40-2R2M 2.2 8.3×8.3×4.5 FENG-JUI TPRH8D43-3R3M 2.2 10.3×10.3×4.0 FENG-JUI TPRH10D40-3R3M Output Capacitor Selection The output capacitor is required to maintain the DC output voltage. Low ESR capacitors are preferred to keep the output voltage ripple low. In a buck converter circuit, output ripple voltage is determined by inductor value, switching frequency, output capacitor value and ESR. The output ripple is determined by:  1 VO  IL   ESRCOUT  8  f  COUT     Where f = operating frequency, COUT= output capacitance and ΔIL = ripple current in the inductor. For a fixed output voltage, the output ripple is highest at maximum input voltage since ΔIL increases with input voltage. Capacitor Value Case Size Component Supplier Model 10μF 0805 Taiyo Yuden JMK212BJ106MG 10μF 0805 TDK C12012X5ROJ106K 22μF 0805 1206 TDK C2012JB0J226M Using Ceramic Input and Output Capacitors Care must be taken when ceramic capacitors are used at the input and the output. When a ceramic capacitor is used at the input and the power is supplied by a wall adapter through long wires, a load step at the output can induce ringing at the input, VIN. At best, this ringing can couple to the output and be mistaken as loop instability. At worst, a sudden inrush current through the long wires can potentially cause a voltage spike at VIN, which may large enough to damage the part. When choosing the input and output ceramic capacitors, choose the X5R or X7R specification. Their dielectrics have the best temperature and voltage characteristics of all the ceramics for a given value and size. Output Current Programming The output current is set by a resister connected from FB pin to ground. The current is: IO  0.1V R1 This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 8/12 FP8013 PC Board Layout Checklist 1. The power traces, consisting of the GND, SW and VIN trace should be kept short, direct and wide. 2. Place CIN near VIN pin as closely as possible to maintain input voltage steady and filter out the pulsing input current. 3. The current setting resister R1 must be connected to FB pin directly and as closely as possible. 4. FB is a sensitive node. Please keep it away from switching node, SW. A good approach is to route the feedback trace on another PCB layer and have a ground plane between the top and feedback trace routing layer. This reduces EMI radiation on to the DC-DC converter its own voltage feedback trace. 5. Keep the GND plates of CIN and COUT as close as possible. Then connect this to the ground plane (if one is used) with several vias. This reduces ground plane noise by preventing the switching currents from circulating through the ground plane. It also reduces ground bounce at FP8013 by giving it a low impedance ground connection. This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 9/12 FP8013 C1 C2 VOUT VIN 1 2 VIA TO VOUT 8 FP8013 7 3 6 4 5 L1 LED GND R1 Suggested Layout for SOP-8L(EP) This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 10/12 FP8013 Typical Application 1 2 EN NC VCC NC 8 7 L1 1.0μH FP8013 VIN 3 AVCC 4 FB / VOUT 2.5V/5.5V C1 22μF SW GND 6 5 LED C2 22μF GND R1 0.05Ω SOP-8L(EP) This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 11/12 FP8013 Package Outline SOP-8L (EP) UNIT: mm Symbols Min. (mm) Max. (mm) A 1.346 1.752 A1 0.050 0.152 A2 1.498 D 4.800 4.978 E 3.810 3.987 H 5.791 6.197 L 0.406 1.270 θ° 0° 8° Min. (mm) Max. (mm) Exposed PAD Dimensions: Symbols E1 2.184 REF D1 2.971 REF Note: 1. Package dimensions are in compliance with JEDEC outline: MS-012 AA. 2. Dimension “D” does not include molding flash, protrusions or gate burrs. 3. Dimension “E” does not include inter-lead flash or protrusions This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. Website: http://www.feeling-tech.com.tw Rev. 0.60 12/12