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Technical content
Features
Fixed Reference Voltage: 1.25V Reference Voltage Precision: 2% Output Sink Current: 5mA Current Consumption: 2.4mA Output Inverting Voltage Deviation: OPA1: 3mV, OPA2: 1mV Wide Operation Voltage Range: 2.5V ~ 20V Package: SOT23-5L
Applications
Charger Switching Power Supply AC Adapter Function Block Diagram
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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 SOT23-5L VFB VCCOUT GND CS 4B915 Top View IC Date Code Identification SOT23-5L Name No. I / O Description OUT 1 I Open Emitter GND 2 P Ground CS 3 I Current Sense Input VFB 4 I Voltage Feedback Sense Input VCC 5 P IC Power Supply Lot Number: Wafer lot number’s last two digits For Example: 132386TB 86 Year: Production year’s last digit Mass Production Version: Mass production mask version Part Number Code: Part number identification code for this product. It should be always “4”.
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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
Part Number Operating Temperature Package MOQ Description FP115KR-LF -20°C ~ +85°C SOT23-5L 2500EA Tape & Reel Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage V cc 2.5 20 V Input Voltage On Other Pins V i -0.3 V cc V Power Dissipation TA=25°C 250 mW Storage Temperature -40 +125 °C Maximum Junction Temperature T J +150 °C Lead Temperature (soldering, 10 sec) +250 °C / W IR Re-flow Soldering Curve
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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 cc 2.5 20 V Operating Temperature -20 +85 °C Parameter Symbol Conditions Min. Typ. Max. Unit OPA1 Section Output Inverting Voltage V FB V CS=0V, RL=4.3K, VCC=5K 1.225 1.25 1.275 V Input Bisa Current I B1 V CS=0V, RL=4.3K 30 150 nA PSRR PSRR 1 VCS=0V, RL=4.3K 50 dB Output Sink Current I O1 VFB=1.35V, VCS=0V, VOUT=1.5V 5 mA Output Inverting Voltage Deviation △VFB Vcs=0V, RL=4.3V, VCC=2.5V~5V 3 mV Output Inverting Voltage Temperature Coefficient ±100 ppm / ℃ OPA2 section Output Inverting Voltage V CS V FB=0V, RL=4.3K, VCC=5V 150 156 162 mV Input Bias Current I B2 V FB=0V, RL=4.3K 30 150 nA PSRR PSRR 2 VFB=0V, RL=4.3K 50 dB Output Sink Current I O2 VCS=0.17V, VFB=0V, VOUT=1.5V 5 mA Output Inverting Voltage Deviation △VCS VFB=0V, RL =4.3K, VCC=2.5~5V 1 mV Output Inverting Voltage Temperature Coefficient ±100 ppm/℃ Total Device Current Consumption I CC V FB=0V, VCS=0V, RL=∞ 2.4 3.4 mA
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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 Operating Characteristics (TA=25°C, unless otherwise noted)
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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 Description Internal Reference Regulator The FP115 includes a 1.25V high precision shut regu lator to reduce application circuit external part number. This 1.25V reference voltage is divi ded down by resistor string to 156mV then connects to OPA1 and OPA2’s non-inverting input for comparison. Applications with VCC voltage higher than 20V are not suitable for this chip as an internal 2K Ω resistor which connected between Vcc and 1.25V reference will draw too much current and increase power loss. 1.25V 156mV VCC GND Figure 5 1.25V Reference Regulator With Resistor Divider For example: If VCC is 6V, the power loss of the 2K Ω resistor is (6-1.25)2/2KΩ=11.3mW. When VCC is 12V, the power loss of the 2KΩ resistor is (12-1.25)2/2KΩ=57.8mW.
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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. Operation Amplifier 1 and Operation Amplifier 2 FP115 includes two operation amplifiers. Their outputs are tied together to implement wired-NOR function. When the inverting input voltage of OPA is lower than non-inverting reference voltage, the output transistor is turn-off; otherwise the output tr ansistor is turn-on. The output total sink current ability is near 10mA When apply FP115 in an AC-DC converter circ uit, connect FP115’s output (pin1) to a photo-coupler. The output will drive photo diode turn ing-on or off depending on the FB and CS pin voltage to adjust AC-DC converter’s output voltage. In general, OPA1 is used for voltage feedback and OPA2 is used for over current feedback. Please check FP115 application note for detail design reference circuits. Voltage feedback equation: V25.11R 2R1VOUT Current feedback equation: RsIomV156
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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. Application Circuit 18uH RV1 07D471K FP115 3 4 5OUT GND CS VFB VCC 0.1uF OUT 1.8K R15 4.3M VOUT R19 0.22 R13 300KVB 1N4148 R14 82K 0.1 1W R20 4.7K ST N VB C7 222 50V PC817 VOUT ZD2 8.1V 1/2W R11 39K 1% 2200pF RTN ZD1 9V 1/2W 100K 150 FB 2200pF R17 750 OUT 2.2 2N3904 + C1 4.7uF 400V + C9 220uF/16V C11 0.22u OUT VOUT + C2 4.7uF 400V CS R16 4.7K R10 220 102 1KV 1.1K L VB VOUT LED1 C10 104 FB BD1 DB105G OUT R6 82 R18 0.22 R12 330 22uH CS C12 103 2N60B PS1010 RTN R7 220 RTN SB260 + C8 1000uF 10V Figure 6 3.5W RCC Adapter Application Circuit
This datasheet contains new product informat ion. Feeling Technology reserves the ri ghts 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 SOT23-5L UNIT: mm 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 “E1” does not include inter-lead flash or protrusions. Symbols Min. (mm) Max.(mm) A 1.050 1.350 A1 0.050 0.150 A2 1.000 1.200 b 0.250 0.500 c 0.080 0.200 D 2.700 3.000 E 2.600 3.000 E1 1.500 1.700 e 0.950 BSC e1 1.900 BSC L 0.300 0.550 L1 0.600 REF L2 0.250 BSC θ° 0° 10 ° θ1° 3° 7° θ2° 6° 10 °