FP6298XR-G1

FP6298 Low-Noise 4.5A Step-Up Current Mode PWM Converter General Description The FP6298 is a current mode boost DC-DC converter. It is PWM circuitry with built-in 0.08Ω power MOSFET make this regulator highly power efficient. The internal compensation network also minimizes as much as 6 external component counts. The non-inverting input of error amplifier connects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrush current. The FP6298 is available in the SOP-8L(EP) package and provides space-saving PCB for the application fields. Features  Adjustable Output up to 9V  Internal Fixed PWM frequency: 500KHz  Precision Feedback Reference Voltage: 0.6V (±2%)  Internal 0.08Ω, 4.5A, 12V Power MOSFET  Shutdown Current: 0.1μA  Over Temperature Protection  Over Voltage Protection  Adjustable Over Current Protection: 0.5A ~ 4.5A  Package: SOP-8L(EP) Applications  Chargers  LCD Displays  Digital Cameras  Handheld Devices  Portable Products Typical Application Circuit 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 1/10 FP6298 Function Block Diagram Pin Descriptions SOP-8L(EP) Name No. I / O Description PGND 1 P IC Ground OC 2 I Adjustable Current Limit (Floating Available) Vcc 3 P IC Power Supply EN 4 I Enable Control (Active High) GND 5 P IC Ground FB 6 I Error Amplifier Inverting Input NC 7 NA LX 8 O Power Switch Output EP 9 P Exposed PAD (Must connect to Ground) Connect to GND or floating cannot connect to other node 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 2/10 FP6298 Marking Information SOP-8L(EP) 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 3/10 FP6298 Ordering Information Part Number Operating Temperature Package MOQ Description -40°C ~ 85°C SOP-8L(EP) 2500EA Tape & Reel FP6298XR-G1 Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage VCC 0 6 V LX Voltage VLX 0 12 V 0 6 V +83 °C / W +150 °C EN,FB Voltage Thermal Resistance (Note1) θJA Junction Temperature TJ SOP-8L(EP) Operating Temperature TOP -40 +85 °C Storage Temperature TST -65 +150 °C +260 °C Lead Temperature (soldering, 10 sec) Note1: θJA is measured in the natural convection at TA=25°C on a low effective thermal conductivity test board of JEDEC 51-3 thermal measurement standard. 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 4/10 FP6298 Recommended Operating Conditions Parameter Symbol Supply Voltage VIN Operating Temperature Range TA Conditions Ambient Temperature Min. Max. Unit 2.6 Typ. 5.5 V -40 +85 °C DC Electrical Characteristics (VCC=3.3V, TA=25°C, unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit 5.5 V System Supply Input Input Supply Range VCC Under Voltage Lockout 2.6 VUVLO UVLO Hysteresis 2.2 V 0.1 V Quiescent Current ICC VFB=0.66V, No switching 0.2 mA Average Supply Current ICC VFB=0.55V, Switching 6.5 mA Shutdown Supply Current ICC VEN=GND 0.1 µA Oscillator Operation Frequency Frequency Change with Voltage FOSC 400 △f / △V VCC=2.6V to 5.5V Maximum Duty Cycle TDUTY 500 600 KHZ 5 % 90 % Reference Voltage VREF Reference Voltage Line Regulation 0.588 0.6 0.612 0.2 VCC=2.6V～5.5V V %/V Enable Control Enable Voltage VEN Shutdown Voltage VEN 0.96 V 0.6 V MOSFET On Resistance of Driver RDS (ON) ILX=2A 0.08 Ω 4.5 A Protection OCP Current IOCP Adjustable OCP Current IOCP OTP Temperature TOTP With External Resistor： 26k~500k 4.5 0.5 +150 A °C 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 5/10 FP6298 Function Description Operation The FP6298 is a current mode boost converter. The switching frequency is 500KHz and operates with pulse width modulation (PWM). Build-in 12V / 4.5A MOSFET provides a high output voltage. The control loop architecture is peak current mode control; therefore slope compensation circuit is added to the current signal to allow stable operation for duty cycles larger than 50%. Soft Start Function Soft start circuitry is integrated into FP6298 to avoid inrush current during power on. After the IC is enabled, the output of error amplifier is clamped by the internal soft-start function, which causes PWM pulse width increasing slowly and thus reducing input surge current. Current Limit Program A resistor between OC and GND pin programs peak switch current. The resistor value should be between 26k to 500k. The current limit will be set from 4.5A to 0.5A. Keep traces at this pin as short as possible. Do not put capacitance at this pin. To set the over current trip point according to the following equation: IOCP = 110000 + 0 .3 R3 Over Temperature Protection (OTP) FP6298 will turn off the power MOSFET automatically when the internal junction temperature is over 150°C. The power MOSFET wake up when the junction temperature drops 30°C under the OTP threshold temperature. Over Voltage Protection (OVP) In some condition, the resistive divider may be unconnected, which will cause PWM signal to operate with maximum duty cycle and output voltage is boosted higher and higher. The power MOSFET will be turned off immediately, when the output voltage exceeds the OVP threshold level. The FP6298’s OVP threshold is 12V. 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 6/10 FP6298 Application Information Inductor Selection Inductance value is decided based on different condition. 3.3uH to 4.7µH inductor value is recommended for general application circuit. There are three important inductor specifications, DC resistance, saturation current and core loss. Low DC resistance has better power efficiency. Capacitor Selection The output capacitor is required to maintain the DC voltage. Low ESR capacitors are preferred to reduce the output voltage ripple. Ceramic capacitor of X5R and X7R are recommended, which have low equivalent series resistance (ESR) and wider operation temperature range. Diode Selection Schottky diodes with fast recovery times and low forward voltages are recommended. Ensure the diode average and peak current rating exceed the average output current and peak inductor current. In addition, the diode’s reverse breakdown voltage must exceed the output voltage. Output Voltage Programming The output voltage is set by a resistive voltage divider from the output voltage to FB. The output voltage is: R1   VOUT  0.6 V 1   R 2  Layout Considerations 1. The power traces, consisting of the GND trace, the LX trace and the VCC trace should be kept short, direct and wide. 2. LX、L and D switching node, wide and short trace to reduce EMI. 3. Place CIN near VCC pin as closely as possible to maintain input voltage steady and filter out the pulsing input current. 4. The resistive divider R1and R2 must be connected to FB pin directly as closely as possible. 5. FB is a sensitive node. Please keep it away from switching node, LX. 6. The GND of the IC, CIN and COUT should be connected close together directly to a ground plane. 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 7/10 FP6298 Vin L1 D1 1 VIA to GND R3 2 3 8 FP6298 4 C1 Vout 7 R1 6 5 R2 C2 C4 C3 GND Suggested Layout 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 8/10 FP6298 Typical Application L1 3.3µH D1 SR54 VIN 3.7V VOUT 5V C1 22µF R1 73K C2 22µF 1 2 R3 26K LX OC NC 8 C3 22µF 7 C4 22µF R2 10K FP6298 3 4 Note: PGND VCC FB EN GND 6 5 Don’t pull the Vout back to the FP6298’s Vcc pin. When the system receives the noise, it will lead to Vout ripple too high and over the absolute maximum rating of the Vcc pin. 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 9/10 FP6298 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° Exposed PAD Dimensions: Symbols Min. (mm) Max. (mm) 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. Rev. 0.64 Website: http://www.feeling-tech.com.tw 10/10