UNISONIC TECHNOLOGIES CO., LTD P2172 Preliminary LINEAR INTEGRATED CIRCUIT 100KHZ, 1.25A HIGH EFFICIENCY SWITCHING REGULATORS DESCRIPTION The UTC P2172 is monolithic high power switching regulators. It can be operated in all standard switching configurations including boost, buck, fly-back, forward, inverting and “Cuk.” By utilizing current-mode switching techniques, they provide excellent AC and DC load and line regulation. DIP-8 FEATURES * Wide Input Voltage Range: 3V~60V * Low Quiescent Current: 6mA * Very Few External Parts Required * Self-Protected Against Overloads * Operates in Nearly All Switching Topologies * Flyback-Regulated Mode Has Fully Floating Outputs * Can Be Externally Synchronized ORDERING INFORMATION Ordering Number Lead Free P2172L-D08-T P2172G-D08-T Halogen Free P2172G-D08-T Package Packing DIP-8 Tube (1)Packing Type (1) T: Tube (2)Package Type (2) D08: DIP-8 (3)Halogen Free (3) L: Lead Free, G: Halogen Free www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd 1 of 7 QW-R103-067.a P2172 Preliminary PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 PIN NAME GND VC FB NC VIN E1 VSW 8 E2 LINEAR INTEGRATED CIRCUIT DESCRIPTION Signal ground. Keep separate from power grounds (E1 and E2). Output of transconductance error amplifier. Error amplifier inverting input. Not connect Input supply voltage Power return of first transistor (Q1). This pin must be connected to ground Collector of output transistors. Grounding this pin sets the current limit point to the maximum value. If pin is left open, the current limit is set to half its maximum value UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R103-067.a P2172 Preliminary LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM VIN 5 16V 2.3V REG UVLO FLY-BACK EA 2.3V OSC LOGIC MODE SELECT FB VSW 7 DRIVER Q1 Q2 ANTISAT PWM - 3 EA 1.24V + S.D. COMP 0.15V 0.16Ω 0.16Ω 1 2 6 8 GND VC E1 E2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw + SENSE - 3 of 7 QW-R103-067.a P2172 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VIN 60 V Switch Output Voltage VSW 60 V Feedback Pin Voltage (Transient, 1ms) ±15 V Operating Junction Temperature Range TJ -40~100 °C Storage Temperature Range TSTG -65~150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (VIN=15V, VC=0.5V, VFB=VREF, output pin open, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITIONS MIN Measured at Feedback Pin 1.224 Reference Voltage VREF VC=0.8V Feedback Input Current IB VFB=VREF △IC=±25μA 3000 Error Amplifier Transconductance gm Error Amplifier Source or Sink Current VC =1.5V 150 1.80 Hi Clamp, VFB=1V Error Amplifier Clamp Voltage Lo Clamp, VFB=1.5V 0.25 Reference Voltage Line Regulation 3V≤VIN ≤VMAX, VC=0.8V Error Amplifier Voltage Gain AV 0.9V≤ VC ≤1.4V 500 Minimum Input Voltage (Note 3) Supply Current IQ 3V≤VIN ≤VMAX, VC=0.6V Control Pin Threshold Duty Cycle=0 0.8 Normal / Flyback Threshold on Feedback 0.4 Pin Flyback Reference Voltage (Note 3) VFB IFB=50μA 15.0 Change in Flyback Reference Voltage 0.05≤IFB≤1mA 4.5 IFB=50μA Flyback Reference Voltage Line Regulation (Note 3) 7V≤VIN ≤VMAX △IC=±10μA 150 Flyback Amplifier Transconductance (gm) 15 VC=0.6V Source Flyback Amplifier Source and Sink Current IFB=50μA Sink 25 Output Switch Breakdown Voltage BV 3V≤VIN ≤VMAX, ISW=1.5mA 65 Output Switch “On” Resistance (Note 2) VSAT Control Voltage to Switch Current Transconductance Duty Cycle=50% Duty 1.25 Switch Current Limit ILIM Cycle=80% (Note 2) 1.00 ΔIIN Supply Current Increase During Switch Δ ISW On-Time UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP MAX UNIT 1.244 1.264 V 350 4400 200 750 6000 350 2.30 0.52 0.03 800 2.6 6 0.9 3.0 9 1.08 nA μmho μA V V %/V V/V V mA V 0.45 0.54 V 16.3 6.8 17.6 9 V V 0.01 0.03 %/V 300 32 40 80 0.60 650 70 70 μmho 0.38 1.00 2 25 μA V Ω A/V 3.5 2.5 A A 35 mA/A 4 of 7 QW-R103-067.a P2172 Preliminary LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) (VIN=15V, VC=0.5V, VFB=VREF, output pin open, unless otherwise noted.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Switching Frequency f 88 100 112 kHz Maximum Switch Duty Cycle DCMAX 85 92 97 % Shutdown Mode Supply Current 3V≤VIN≤VMAX, VC=0.05V 100 250 μA Shutdown Mode Threshold Voltage 3V≤VIN≤VMAX 100 150 250 mV Flyback Sense Delay Time (Note 3) 1.5 μs Notes: 1. Measured with VC in hi clamp, VFB=0.8V, ISW=1A. 2. For duty cycles (DC) between 50% and 80%, minimum guaranteed switch current is given by ILIM=0.833×(2-DC). 3. Minimum input voltage for isolated flyback mode is 7V, VMAX=55V for HV grade in fully isolated mode to avoid switch breakdown. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R103-067.a P2172 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT 5V L1 50µH 1 GND C3 + 100µF R3 1k E2 8 2 VC VSW 7 3 FB E1 6 4 NC VIN 5 C1 1µF D1 MBR330 C2 + 1000µF L2 Output 10µH Filter C3 100µF 12V R1 0.25A 10.7k 1% R2 1.24k 1% Boost Converter (5V~12V) + UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 7 QW-R103-067.a P2172 Preliminary LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 7 QW-R103-067.a