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Features
Wide Supply Voltage Operating Range: 3.6 to 28V Built-in P-MOSFET for 2A Loading Capability Precision Feedback Reference Voltage: 0.25V (2%) Low Current Consumption: 4mA Internal Fixed Oscillator Frequency: 320KHz (Typ.) Internal Soft-Start Function (SS) Over Current Protection Package: SOP-8L &SOP-8L(EP) Typical Application Circuit FP 7102 VIN VCC COMP FBEN LX LX GNDGND ON/OFF
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Function Block Diagram 2.50V Output Drive Control Circuits Internal Soft Start Circuit Reference Regulator Oscillator VCC FB 0. 25V 500 36K COMP GND GND LX LX Thermal Shutdown Over Current Protection Enable Control EN
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Pin Descriptions SOP- 8L FP7102 9Fa-86L SOP- 8L (EP) FB COMP VCC GND LX FP7102 9Fa-86L Top View EN LX GND EP Bottom View Name No. I / O Description FB 1 I Error Amplifier Inverting Input EN 2 I Enable Control COMP 3 O Error Amplifier Compensation Output VCC 4 P IC Power Supply (PMOS Source) LX 5 P PMOS High Current Output LX 6 P PMOS High Current Output GND 7 O IC Ground GND 8 O IC Ground Name No. I / O Description FB 1 I Error Amplifier Inverting Input EN 2 I Enable Control COMP 3 O Error Amplifier Compensation Output VCC 4 P IC Power Supply (PMOS Source) LX 5 P PMOS High Current Output LX 6 P PMOS High Current Output GND 7 O IC Ground GND 8 O IC Ground EP 9 P Exposed PAD. Must connect to LX
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Marking Information SOP- 8L & 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 informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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.
Ordering Information
IR Re-flow Soldering Curve Part Number Operating Temperature Package MOQ Description FP7102DR-LF -25°C ~ +85°C SOP-8L 2500EA Tape & Reel FP7102XR-LF -25°C ~ +85°C SOP-8L (EP) 2500EA Tape & Reel Parameter Symbol Conditions Min. Typ. Max. Unit Power Supply Voltage V IN 28 V Output Source Current 2 A Error Amplifier Inverting Input -0.3 +1.2 V Allowable Dissipation TA +25≦ ℃ 650 mW Thermal Resistance Junction to Ambient θJA +175 ℃ / W Thermal Resistance Junction to Case θJC +45 ℃ / W ESD Susceptibility HBM (Human Body Mode) 2 KV MM (Machine Mode) 200 V Storage Temperature -55 +125 ℃ Lead Temperature (soldering, 10 sec) +260 ℃
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Recommended Operating Conditions Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage V IN 3.6 28 V Operating Temperature -25 85 ℃ Parameter Symbol Conditions Min. Typ. Max. Unit Reference Output Voltage V REF FB connected to COMP 0.245 0.25 0.255 V Input Regulation △VREF VCC＝3.6 V to 25 V 2 12.5 mV Output Voltage Change with Temperature △VREF / VREF TA＝-25℃ to 25 ℃ 1 2 TA＝ 25 ℃ to 85 ℃ 1 2 Oscillator Section Oscillation Frequency f 320 KHz Frequency Change with Voltage Δf / ΔV V CC=3.6V to 25V 5 % Frequency Change with Temperature Δf / ΔT TA = -25℃ to +85℃ 5 % Error Amplifier Section Input Bias Current I B -1.0 -0.2 1.0 μA Voltage Gain Av 100 V / V Frequency Bandwidth BW Av=0 dB 6 MHz Output Voltage Swing Positive V POS 1.7 2 V Output Voltage Swing Negative V NEG 0.1 0.2 V Output Source Current I SOURCE V comp=200mV -15 -30 μA Output Sink Current I SINK V comp=200mV 15 30 μA Idle Period Adjustment Section Maximum Duty Cycle TDUTY VFB =0.2V 100 % Output Section PMOS D-S Voltage V DSS V COMP=0.1V -20 V PMOS Source Current I D -2 A PMOS On Resistance R DS (ON) VCC=5.0V, V FB=0V 70 150 mΩ VCC=10V, V FB=0V 42 90 Output Leakage Current I L 5 μA Thermal Shutdown Section Thermal shutdown Temperature 150 ℃ Over Current Protection Section PMOS OCP Current I OCP 3 A
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Parameter Symbol Conditions Min. Typ. Max. Unit Total Device Section EN Input Current I EN EN pin Open 20 μA Upper Threshold Voltage (EN) V UPPER 1.12 V Lower Threshold Voltage (EN) V LOW 0.87 V Hysteresis V HYS 210 250 mV Average Supply Current I AVE 4 6 mA VCC Shutdown I SHUTDOWN 15 μA
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Detailed Description Voltage Reference A built-in 2.5V reference regulator supplies FP7102 internal circuits. Also, this 2.5V reference voltage is divided down by an internal resistive divider to provide a 0.25V precision reference voltage to the error amplifier non-inverting terminal. Setting the LED Current FP7102 is a constant current buck regulator. The LEDs are connected between VOUT and FB pin as shown in the Typical Application Circuit section. The FB pin is 0.25V in regulation. Therefore, the LEDs current IF is set by V FB and the resistor R 2 connected between FB and ground by the following equation: FB F R VI IF should not exceed the 2A current capability of FP7102 and therefore R 2 minimum value must be approximately 0.13Ω. Output Voltage The output voltage is primarily determined by the number of LEDs(n) connected between V OUT and FB pin. Therefore, VOUT can be written as: )V)Vn((V FBFOUT Where VF is the forward voltage of one LED at the se t LED current level (see LED manufacturer datasheet for forward characteristics curve) Oscillator The fixed PWM frequency is generated by an internal oscillator. Its typical values are 320KHz. Thermal Protection The thermal protection is triggered when junction temperature is higher than 150 ℃ that may occurs by an abnormal heavy current loading. When this happens, the FP7102 turns output off. Once the junction temperature is cooled down to lower than 130℃, FP7102 starts again and turns the power switch on.
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Over Current Protection The FP7102 uses cycle-by-cycle current limit to protect the internal power switch. During each switching cycle, a current limit comparator detects if the power switch current exceeds the internal setting current. If it does, over current protection fu nction decrease the oscillator frequency to prevent thermal issue.
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Typical Application FP7102 1W / 3W LED for DC Input Circuit Dimming Control Circuit Changing the duty cycle of PWM signal can get different LED current. The PWM signal is recommended above 10kHz. The application circuit is shown in the following. The LED current can be calculated by the following equation: 5R3R )VDutyV(4RV I FBPWM FB LED
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. Package Outline SOP-8L UNIT: mm Note: 1. Package dimensions are in compliance with JEDEC outline: MS-012 AC. 2. Dimension “D” does not include moldi ng flash, protrusions or gate burrs. 3. Dimension “E” does not include inter-lead flash or protrusions. Symbols Min. (mm) Max. (mm) A 1.346 1.752 A1 0.101 0.254 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°
This datasheet contains new product informat ion. Feeling Technology reserves the right s to modify the product specification wi thout 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. SOP-8L (EP) U N I T : m m Exposed PAD Dimensions: Note: 1. Package dimensions are in compliance with JEDEC outline: MO-178 AA. 2. Dimension ”D” does not include moldi ng flash, protrusions or gate burrs. 3. Dimension “E” does not include inter-lead flash or protrusions 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° Symbols Min. (mm) Max. (mm) E1 2.184 REF D1 2.971 REF