AP2014SG-13

AP2014_09 DIODES | Alldatasheet

Document overview

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Technical content

Features

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 2 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Pin Assignment FB VcLDrv HDrv VCC SS Comp GND ( Top View ) SOP-8L Pin Descriptions Pin Name Pin No. Description FB 1 This pin is connected directly to the output of the switching regulator via resistor divider to provide feedback to the Error amplifier. Vcc 2 This pin provides biasing for the internal blocks of the IC as well as power for the low side driver. A minimum of 1uF, high frequency capacitor must be connected from this pin to ground to provide peak drive current capability. LDrv 3 Output driver for the synchronous power MOSFET. GND 4 This pin serves as the ground pin and must be connected directly to the ground plane. A high frequency capacitor (0.1 to 1uF) must be connected from V5 and V12 pins to this pin for noise free operation. HDrv 5 Output driver for the high side power MOSFET. Vc 6 This pin is connected to a voltage that must be at least 4V higher than the bus voltage of the switcher (assuming 5V threshold MOSFET) and powers the high side output driver. A minimum of 1uF, high frequency capacitor must be connected from this pin to ground to provide peak drive current capability. Comp 7 Compensation pin of the error amplifier. An external resistor and capacitor network is typically connected from this pin to ground to provide loop compensation. SS 8 This pin provides soft-start for the switching regulator. An internal current source charges an external capacitor that is connected from this pin to ground which ramps up the output of the switching regulator, preventing it from overshooting as well as limiting the input current. The converter can be shutdown by pulling this pin below 0.5V.

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 3 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Block Diagram SS Fb Comp GND LDrv Vcc HDrv Vc 25K 25K 1.25V POR 20uA 64uA Max Error Amp + OscillatorCt Error Comp S R Q Reset Dom Bias GeneratorVcc 4.0V Vc 3.5V 0.2V 0.2V 1.25V POR FbLo Comp 0.5V POR

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 4 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Typical Application Circuit (1) 10nF C17 0.1u VIN=5V C12 470u Vc=12V 470u Vout +1.5V/7.0A 5.6u/9.0 22k AP2014 C13 470uC20 100p 0.47u 8.2 0.1u 3.3K C11 0.1u 820 8FB Vcc LDrv GND HDrv Vc Comp SS (2) Vout +1.5V/7.0A 0.47u 8.2 C13 470u 0.1uF C8 470u 3.3K C11 0.1u AP2014 4 5 8FB Vcc LDrv GND HDrv Vc Comp SS C12 470u 820 6.8k VIN=12V C20 100p Option 0.1u 10nF C17 0.1u 100u 5.6u/9A 1N4148 1N4148 Single Supply 12V Input

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 5 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Typical Application Circuit (Continued) (3) Vout +5V/5.0A 0.47u 8.2 C13 470u 0.1uF C8 470u C11 0.1u AP2014 4 5 8FB Vcc LDrv GND HDrv Vc Comp SS 10K 39k VIN=12V C20 100p 0.1u 10nF C17 0.1u 100u 10uH/6A 1N4148 1N4148 Single Supply 12V Input (4) Vout +5V/4.0A 0.47u 8.2 C13 470u 0.1uF C8 470u 3.3K C11 0.1u AP2014 4 5 8FB Vcc LDrv GND HDrv Vc Comp SS 10K Q1-1 47k VIN=24V C20 100p 0.1u 10nF Q1-2 C17 0.1u 100u 10uH/6A 1.2K RZD 8.2 ZD 6.2V 1N4148 1N4148 IZD(≧15mA)=(VIN-VD2-VZD)/RZD Single Supply 24V Input

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 6 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Typical Application Circuit (Continued) (5) 4.7u C10 470u 470u +12V C15 470uoptional C12 470u C20 10p 0.1u +12V_BUSR4 +12V C11 0.1u 39k SBD Vout +1.26V R C13 470u 470u 5600pF AP2014A 8FB Vcc LDrv GND HDrv Vc Comp SS C17 0.1u 2.2K 70T03H 70T03H

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 7 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Typical Application Circuit (Continued) (6) Dual Supply, 5V Bus and 12V Bias Input SS Fb Comp GND LDrv Vcc HDrv Vc AP2014 0.1uF 10nF 3.3K 10uH 100uF 1uH C4 47uF 1.8V/1A 2.5V/2A 0.1uF AP1187 12V SS Fb Comp GND LDrv Vcc HDrv Vc AP2014 C13 0.1uF C14 10nF 3.3K 1.65K C11 3.3V/1.8A C12 220uF 0.1uF 1uF 47uF C10 1uF 10uH 220uF Dual Supply, 5V Bus and 12V Bias Input

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 8 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Absolute Maximum Ratings Symbol Parameter Rating Unit VCC VCC Supply Voltage 20 V Vc Vc Supply Voltage (not rated for inductive load) 32 V TST Storage Temperature Range -65 to +150 oC TOP Operating Junction Temperature Range 0 to +125 oC θJC Thermal Resistance Junction to Case 7 oC/W θJA Thermal Resistance Junction to Ambient 160 oC/W Notes: 3. Test conditions for SOP-8L: Device mounted on 2oz copper, minimum recommended pad layout, FR-4 PCB.

Electrical Characteristics

Unless otherwise specified, these specifications apply over VCC=5V, VC=12V and TA=0 to 70°C. Typical values refer to TA =25°C. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. Symbol Parameter Conditions Min. Typ. Max. Unit Reference Voltage LREG FB Voltage Line Regulation 5 < Vcc < 12 - 0.2 0.35 % UVLO UVLO VCC UVLO Threshold - VCC Supply Ramping Up 4.0 4.2 4.4 V UVLO Hysteresis - VCC - 0.25 - V UVLO VC UVLO Threshold - VC Supply Ramping Up 3.1 3.3 3.5 V UVLO Hysteresis - VC - 0.2 - V UVLO FB UVLO Threshold - FB FB Ramping Down (AP2014) 0.4 0.6 0.8 V FB Ramping Down (AP2014A) 0.3 0.4 0.5 V UVLO Hysteresis - FB - 0.1 - V Supply Current Operation ICC V CC Operation Supply Current Freq=200KHz, CL=1500pF - 7 10 mA Operation IC V C Operation Supply Current Freq=200KHz, C L=1500pF - 7 10 mA ICCQ V CC Static Supply Current SS=0V - 3.3 6 mA ICQ V C Static Supply Current SS=0V - 1 4.5 mA Soft-Start Section SSIB Charge Current SS=0V 10 20 30 μA Error Amp IFB1 FB Voltage Input Bias Current SS=3V, FB=1V - -0.1 - μA IFB2 FB Voltage Input Bias Current SS=0V, FB=1V - -64 - μA gm Transconductance 450 600 750 μmho Oscillator Freq Frequency AP2014 170 200 230 KHz AP2014A 340 400 460 KHz VRAMP Ramp-Amplitude Voltage 1.225 1.25 1.275 V Output Drivers Tr Rise Time CL =1500pF - 50 100 ns Tf Fall Time CL =1500pF - 50 100 ns TDB Dead Band Time 50 150 250 ns TON Max Duty Cycle FB=1V, Freq=200KHz 85 90 95 % TOFF Min Duty Cycle FB=1.5V 0 0 - %

SYNCHRONOUS PWM CONTROLLER A P 2 0 1 4 / A R e v . 5 9 o f 1 4 F E B R U A R Y 2 0 0 9 www.diodes.com © Diodes Incorporated Typical Performance Characteristics Load Regulation 0.0% 0.2% 0.4% 0.6% 0.8% 1.0% 1.2% 1.4% 1.6% 1.8% 2.0% Iout(A) Load Regulation (%) Efficiency vs. Iout 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Iout(A) Efficiency (%) Line Regulation 1.240 1.245 1.250 1.255 1.260 Vin(V) Feedback Voltage (V) Line Regulation 2.500 2.505 2.510 2.515 2.520 2.525 2.530 Vin(V) Output Voltage (V) Frequency vs. Vin 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 Vin(V) Frequency (KHz) Frequency vs. Temperature 150.0 160.0 170.0 180.0 190.0 200.0 210.0 220.0 230.0 240.0 -40 -20 0 25 50 75 100 125 Temperature (oC) Frequency (KHz)

SYNCHRONOUS PWM CONTROLLER AP2014/A Rev. 5 10 of 14 FEBRUARY 2009 www.diodes.com © Diodes Incorporated Typical Performance Characteristics (Continued) Icc and Iccq vs. Vin 3.00 5.00 7.00 9.00 11.00 13.00 15.00 4.5 5 7 9 11 12 15 Vin(V) Icc and Iccq (mA) Icc(mA) Iccq(mA) Ic and Icq vs. Vin 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 4.5 5 7 9 11 12 15 Vin(V) Ic and Icq (mA) Ic(mA) Icq(mA) Icc and Ic vs. Temperature 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 - 4 0 - 2 0 0 2 55 07 5 1 0 0 1 2 5 Temperature (oC) Icc and Ic (mA) Icc(mA) Ic(mA) Vfb vs. Temperature 1.20 1.22 1.24 1.26 1.28 1.30 -40 -20 0 25 50 75 100 125 Temperature (oC) Feedback Voltage (V) AP2014A Ic and Icc vs Vc 3.0 5.0 7.0 9.0 11.0 13.0 15.0 17.0 19.0 21.0 6 8 10 12 14 16 18 20 22 24 Vc(V) Ic(mA) Icc(mA) AP2014 Ic and Icc vs Vc 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 6 8 10 12 14 16 18 20 22 24 Vc(V) Ic(mA) Icc(mA)

SYNCHRONOUS PWM CONTROLLER AP2014/A Rev. 5 11 of 14 FEBRUARY 2009 www.diodes.com © Diodes Incorporated Typical Performance Characteristics (Continued) Vout Ripple Vcc=5V; Vc=12V; Vout=2.5V Iout=0.5A, Vripple=30.8mV Vout Ripple Vcc=5V; Vc=12V; Vout=2.5V Iout=5A, Vripple=33.2mV Dead time vs. Iout Vcc=5V, Vc=12V, Vout=2.5V, Iout=0.5A, Temp=28oC Dead time = 150ns Dead time = 150ns Dead time vs. Iout Vcc=5V, Vc=12V, Vout=2.5V, Iout=5A , Temp=28oC Dead time = 160ns Dead time = 150ns Highside GATE Lowside GATE Phase Lowside GATE Highside GATE Phase

SYNCHRONOUS PWM CONTROLLER AP2014/A Rev. 5 12 of 14 FEBRUARY 2009 www.diodes.com © Diodes Incorporated Functional Descriptions Introduction The AP2014 is a fixed frequency, voltage mode synchronous controller and consists of a precision reference voltage, an error am plifier, an internal oscillator, a PWM comparator, 0.5A peak gate driver, soft-start and shutdown circuits (see Block Diagram). The output voltage of the synchronous converter is set and controlled by the output of the error amplifier; this is the amplifi ed error signal from the sensed output voltage and the reference voltage. This voltage is compared to a fixed frequency linear sawtooth ramp and generates fixed frequency pulses of variable duty-cycle, which drives the two N-channel external MOSFETs.The timing of the IC is provided through an internal oscillator circuit which uses on -chip capacitor to set the oscillation frequency to 200 KHz (400 KHz for “A” version). Soft-Start The AP2014 has a programmable soft-start to control the output voltage rise and limit the current surge at the start-up. To ensure correct start-up, the soft-start sequence initiates when the VC and VCC rise above their threshold (3.3V and 4.2V respectively) and generates the Power On Reset (POR) signal. Soft-start function operates by sourcing an internal current to charge an external capacitor to ab out 3V. Initially, the soft-start function clamps the E/A’s output of the PWM converter. As the charging voltage of the external capacitor ramps up, the PWM signals increase from zero to the point the feedback loop takes control. Short-Circuit Protection The outputs are protected against the short circuit. The AP2014 protects the circuit for shorted output by sensing the output v oltage (through the external resistor divider). The AP2014 shuts down the PWM signals, when the output voltage drops below 0.6V (0.4V for AP2014A). The AP2014 also protects the output from over-voltaging when the control FET is shorted. This is done by turning on the sync FE T with the maximum duty cycle. Under-Voltage Lockout The under-voltage lockout circuit assures that the MOSFET driver outputs remain in the off state whenever the supply voltage dr ops below set parameters. Lockout occurs if V C and VCC fall below 3.3V and 4.2V respectively. Normal operation resumes once V C and VCC rise above the set values. IC Quiescent Power Dissipation Power dissipation for IC controller is a function of applied voltage, gate driver loads and switching frequency. The IC's maxim um power dissipation occurs when the IC operating with single 12V supply voltage (Vcc=12V and Vc≅24V) at 400KHz switching frequency and maximum gate loads. Page 8 shows voltage vs. current, when the gate drivers loaded with 1500pF capacitors. The IC's power dissipation results in an excessive temperature rise. This should be considered when using AP2014A for such application.

SYNCHRONOUS PWM CONTROLLER AP2014/A Rev. 5 13 of 14 FEBRUARY 2009 www.diodes.com © Diodes Incorporated Marking Information (1) SOP-8L ( Top View ) AP2014 X YY WW X X Logo Part Number WW : Week : 01~52; 52 YY : Year : 08, 09,10~ X : Internal Code represents 52 and 53 week L : Lead Free AP2014 : 200KHz (OSC) AP2014A : 400KHz (OSC) G : Green Package Information (All Dimensions in mm) (1) Package Type: SOP-8L 1.27typ 0.3/0.5 7°~9° 4.85/4.95 3.85/3.95 5.90/6.10 0.15/0.25 7°~9° 0.62/0.82 0.10/0.20 Gauge Plane 0.254 Seating Plane 0.35max. 45° Detail "A" Detail "A" 1.30/1.50 1.75max. Land Pattern Recommendation (Unit: mm) 6x-1.27 8x-1.55 8x-0.60 5.4 0°/8°

SYNCHRONOUS PWM CONTROLLER AP2014/A Rev. 5 14 of 14 FEBRUARY 2009 www.diodes.com © Diodes Incorporated IMPORTANT NOTICE LIFE SUPPORT Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.