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Technical content
Features
Wide Operating Voltage Range: 4~40V Feedback Reference Voltage: 2.5V Reference Voltage Precision: 1% Output Sink Current up to 100mA Oscillator Frequency: Max. 500KHz Low Quiescent Supply Current Variable Duty Control (DTC) UVLO Protection Function SCP Protection Function (Typ. 1.3V) Package: SOP-16L / SSOP-16L
Applications
Dual Output Switch Regulator Backlight Inverter LCD Monitor
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. Function Block Diagram Oscillator Reference Voltage CTRTVCC R SR UVLO 1/2 VREF PWM COMP PWM COMP Iscp DTC2 FB2 EA2+ EA2- SCP EA1+ EA1- FB1 DTC1 GND OUT1 VREF OUT2
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. Pin Descriptions SOP-16L VREF SCP EA2+ EA2- Top View FB2 DTC2 OUT2 V CC 1CT RT EA1+ EA1- FB1 DTC1 OUT1 GND SSOP-16L CT RT EA1+ Top View EA1- FB1 DTC1 OUT1 GND VREF SCP EA2+ EA2- FB2 DTC2 OUT2 V CC Name No. I / O Description CT 1 I Connect a Capacitor for Oscillator Frequency Adjustment RT 2 I Connect a Resistor for Oscillator Frequency Adjustment EA1+ 3 I Output 1 Error Amplifier Non-inverting Input EA1- 4 I Output 1 Error Am plifier Inverting Input FB1 5 O Output 1 Error Amplifier Output DTC1 6 I Output 1 Maximum Duty Control Voltage OUT1 7 O Output 1 Totem-pole Output GND 8 P IC Ground VCC 9 P IC Power Supply OUT2 10 O Output 2 Totem-pole Output DTC2 11 I Output 2 Dead-Time Comparator FB2 12 O Output 2 Error Amplifier Output EA2- 13 I Output 2 Error Am plifier Inverting Input EA2+ 14 I Output 2 Error Amplifier Non-inverting Input SCP 15 I Connect a Capacitor to Set Short Circuit Protection Timing VREF 16 O 2.5V Reference Voltage Output Name No. I / O Description CT 1 I Connect a Capacitor for Oscillator Frequency Adjustment RT 2 I Connect a Resistor for Oscillator Frequency Adjustment EA1+ 3 I Output 1 Error Amplifier Non-inverting Input EA1- 4 I Output 1 Error Am plifier Inverting Input FB1 5 O Output 1 Error Amplifier Output DTC1 6 I Output 1 Maximum Duty Control Voltage OUT1 7 O Output 1 Totem-pole Output GND 8 P IC Ground VCC 9 P IC Power Supply OUT2 10 O Output 2 Totem-pole Output DTC2 11 I Output 2 Dead-Time Comparator FB2 12 O Output 2 Error Amplifier Output EA2- 13 I Output 2 Error Am plifier Inverting Input EA2+ 14 I Output 2 Error Amplifier Non-inverting Input SCP 15 I Connect a Capacitor to Set Short Circuit Protection Timing VREF 16 O 2.5V Reference Voltage Output
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. Marking Information SOP-16L SSOP-16L Halogen Free Lot Number Per-Half Month Year FP5451A Internal ID 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 ri ghts 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.
Ordering Information
Part Number Operating Temperature Package MOQ Description FP5451ADR-LF -20°C ~ +85°C SOP-16L 2500EA Tape & Reel FP5451ARR-LF -20°C ~ +85°C SSOP-16L 2500EA Tape & Reel Absolute Maximum Ratings Parameter Symbol Conditions Min. Typ. Max. Unit Power Supply Voltage V CC 40 V Differential Input Voltage V ID 20 V Collector Output Voltage V O 40 V Collector Output Voltage I O 150 mA Maximum Junction Temperature T j +150 °C SOP-16L +90 °C / WThermal Resistance Junction to Ambient θJA SSOP-16L +110 °C / W SOP-16L +45 ℃ / WThermal Resistance Junction to Case θJC SSOP-16L +55 ℃ / W SOP-16L, TA= +25℃ 650 mW Power Dissipation P D SSOP-16L, TA= +25℃ 450 mW Storage Temperature Range -65 +150 ℃ Lead Temperature (soldering, 10 sec) +260 ℃ Suggested IR Re-flow Soldering Curve
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. Recommended Operating Conditions Parameter Symbol Conditions Min. Typ. Max. Unit Supply Voltage 4 40 V Operating Temperature -20 +85 ℃ Parameter Symbol Test Conditions Min. Typ. Max. Unit Reference Section Output Voltage (pin 16) V REF I O=1mA 2.45 2.5 2.55 V TA=-20℃ to +25℃ -0.1 ±1 % Output Voltage Change with Temperature Input Voltage Regulation V△ REF / VREF VCC=3.6V～40V 1 12.5 mV Output Voltage Regulation V△ REF / VREF Io = 0.1mA to 1 mA 1 7.5 mV Short-circuit Output Current I SHORT V O=0 3 10 30 mA Under Voltage Lockout Section Upper Threshold Voltage (VCC) V UPPER 2.8 V Lower Threshold Voltage (VCC) V LOW 2.6 V Hysteresis (VCC) V HYS 80 120 mV Reset Threshold Voltage (VCC) V RESET IO (REF) = 0.1 mA, TA=25℃ 1.5 1.9 V Short-circuit Protection Control Section Input Threshold Voltage (SCP) V TH TA= 25℃ 1.2 1.3 1.5 V Standby Voltage (SCP) V STANDBY No Pull-up 60 80 100 mV Latched Input Voltage (SCP) V LATCH No Pull-up 40 60 mV Input (Source) Current I SOURCE VI=0.7V, TA=25℃ -1.5 -2 -2.5 μA Comparator Threshold Voltage (Feedback) VCOMP (TH) 1.20 V Oscillator Section Frequency f C T=330pF, RT=10K 270 KH Z Standard Deviation of Frequency △f CT=330pF, RT=10K 10 % Frequency Change with Voltage f △ / V△ VCC=3.6V to 40V 1 % TA=-20℃ to 25℃ -0.4 ±2 % Frequency Change with Temperature f△ / T△ Duty Control Section Input Bias current (DTC) I BIAS 1 μA Latch Mode (Source) Current (DTC) ISOURCE TA=25℃ -80 -200 μA Latched Input Voltage (DTC) V LATCH IO=40μA 2.3 V Zero Duty Cycle 2.05 2.25 V Input Threshold Voltage at f=10KHz (DTC) VTH Maximum Duty Cycle 1.2 1.45 V
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. Parameter Symbol Test Conditions Min. Typ. Max. Unit Error Amplifier Section Input Offset Voltage V IO Vo (Feedback)=1.25V -6 +6 mV Input Offset Current I IO Vo (Feedback)=1.25V -100 +100 nA Input Bias Current I BIAS Vo (Feedback)=1.25V 160 500 nA Common Mode Input Voltage Range VICM V CC=3.6V to 40 V 0.3 1.6 V Open Loop Voltage Amplification A VO RF=200KΩ 70 80 dB Unity Gain Bandwidth BW 1.5 MH Z Common Mode Rejection Ratio CMRR 60 80 dB Positive Output Voltage Swing V POS Vref-0.2 V Negative Output Voltage Swing V NEG 1 V Output (Sink) Current (Feedback) I SINK V ID= -0.1V, VO=1.25V 1 5.0 mA Output (Source) Current (Feedback) ISOURCE V ID=0.1V, VO=1.25V -90 -140 μA Output Section Collector Off State Current I OFF V O=50V 10 μA Output Saturation Voltage V SAT I O=10mA 0.7 1 V Short Circuit Output Current I SC V O=6V 150 mA PWM Comparator Section Zero Duty Cycle 2.05 2.25 V Input Threshold Voltage at f=10kHz (Feedback) VTH Maximum Duty Cycle 1.2 1.45 V Total Device Standby Supply Current I STANDBY Off State 1.3 1.8 mA Average Supply Current I AVE R T=10K 1.7 2.4 mA
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. R15 2DTC R18 R16 33K R12 0 33K R25 0 C1 330pF OUTPUT #2 R17 R9 0 2DTC 20uH C14 20uH R21 1000pF R23 C12 + C10 220uF/16V R13 3.3K 1% +5.0V IC3 9435 +3.3V R24 20K 1% R19 10K R10 IC2 9435 2IN- 1DTC R26 0 +5.0V SCD24 REF POWER IN R27 12K 1% R11 10K 1% SCD24 R22 R20 10K 2IN+ + C16 220uF/16V 33K 1DTC +Vin +Vin 33K C11 +3.3V + C13 100uF R14 C5 1000pF R3 10K 1OUT IC1 FP5451A 8 9 16CT RT 1IN+ 1IN- 1FB 1DTC 1OUT GND VCC 2OUT 2DTC 2FB 2IN- 2IN+ SCP REF C15 OUTPUT #1 + C17 100uF Timing Waveform H L H L Dead Time 100% 0 V 1.3 V H L 0 V 3.6 V tpe
2.8 V TYPPower Supply Voltage
Output Transistor Collector Waveform PWM Comparator Output Voltage Comparator Input Voltage Short-Circuit Protection Dead-Time Input Voltage Error Amplifier Output Oscillator Triangle Waveform 1.6 V 2.0 V 1.4 V 1.25 V FP5451A Timing Diagram Protection Enable Time, tpe = (0.658 * 10E6 * Cpe) in seconds
Application Information
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. Typical Operating Characteristics
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. ERROR AMP MAXI MUM OUTPUT VOLTAGE SWING VS FREQUENCY Erro r Am p Maxim u m Ou tp ut Vo lta g e S win g - V f - Frequescy - Hz 0.25 0.5 0.75 1.25 1.5 1.75 2.25 1K 10K 10M100K 1M 2.5 TA = 25 o C V cc = 5 V Figure 11
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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.
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. STANDBY CURRENT VS FREE - AIR TEMPERATURE o CTA - Free-Air Temperature - I cc - Suppl y Current - mA -25 0 25 50 75 100 1.5 2.5 3.5 4.5 Vcc = 40 V, No Load Standby Current Vcc = 3.6 V, No Load Standby Current Figure 15 CT = 330pF RT Ω V cc = 6 V Average Supply Current = 10 K
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. Package Outline SOP-16L 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 1.244 1.651 D 9.804 10.007 E 3.810 3.987 H 5.791 6.197 L 0.406 1.270 θ° 0° 8°
This datasheet contains new product information. Feeling Technology reserves the ri ghts 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. SSOP-16L (EP) U N I T : m m Note: 1. Package dimensions are in compliance with JEDEC outline: MO-137 AB. 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 b 0.203 0.304 b1 0.203 0.279 c 0.177 0.254 c1 0.177 0.228 D 4.800 5.003 E1 3.810 3.987 E 5.791 6.197 L 0.406 1.270 e 0.635 BASIC θ° 0° 8°