APW7063 ANPEC | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 21
Technical content
Features
- Graphic Cards
- Memory Power Supplies
- DSL or Cable MODEMs
- Set Top Boxes
- Low-Voltage Distributed Power Supplies General Description The APW7063 integrates PWM and linear controller, as well as the monitoring and protection functions into a single package. The synchronous PWM controller which drives dual N-channel MOSFETs, which provides one controlled power outputs with under-voltage and over-current protections. Linear controller drives an external N-channel MOSFET with under-voltage protection. APW7063 provides excellent regulation for output load variation. An internal 0.8V temperature-compensated reference voltage is designed to meet the various low output voltage applications. APW7063 includes a 250kHz free-running triangle-wave oscillator that is adjustable from below 70KHz to over 800KHz. A power-on-reset (POR) circuit limits the VCC minimum opearting supply voltage to assure the controller working well. Over current protection is achieved by monitoring the voltage drop across the low side MOSFET, eliminating the need for a current sensing resistor and short circuit condition is detected through the FB pin. The over-current protection triggers the soft-start function until the fault events be removed, but Under-voltage protection will shutdown IC directly. Pull the COMP pin below 0.4V will shutdown the controller, and both gate drive signals will be low.
Applications
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw2 APW7063 Handling Code Temp. Range Package Code Package Code K : SOP - 14 Operating Ambient Temp. Range C : 0 to 70 C Handling Code TU : Tube TR : Tape & Reel Lead Free Code L : Lead Free Device Blank : Original Device APW7063 K : APW7063XXXXX XXXXX - Date Code Lead Free Code Ordering and Marking Information Block Diagram Gate Control Soft Start and Fault Logic Power-On Reset PHASE LGATE FB GND VCC UGATE VREF 50%VREF O.C.P Comparator Error Amp PWM Comparator U.V.P Comparator Triangle Wave COMP VCC BOOT vcc IOCSET 250uA vcc ISS 10uA 5.8V PGND V REF 50%VREF FBL VCC DRIVE Regulator SS VCC VREG Oscillator RT Note: ANPEC lead-free products contain molding compounds /die attach m aterials and 100% matte tin plate termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for MSL classification at lead-free peak reflow temperature.
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw3 Application Circuit 1. Boot-Strap - Use Internal Regulator 2. Boot-Strap - Use External Power + C9 470uF 25mR 16V 12V VIN 12V 3V3 RT1 SS2 VREG3 FB4 COMP5 GND6 PHASE7 UGATE 8BOOT 9PGND 10LGATE 11VCC 12DRIVE 13FBL 14 APW7063 APM4220 APM4220 2.5V APM3055L 2.2uH 1uH 1uF 0.1uF 2R2 NC C12 0.1uF 1N4148 SR24 3.125KF R12 1.07KF R10 2.32KF NC 1uF 100R C18 0.1uF 1KF +C6 470uF C11 4.7uF C15 4.7uF 4.7uF +C5 470uF + C3 470uF +C14 1000uF +C13 1000uF C16 0.01uF R11 20K 620R +C10 470uF C17 56pF /SHDN VIN 2A/40V 6.3V6.3V 16V 30mR 30mR 25mR 16V 25mR 6.3V 25mR 6.3V 25mR 1uF APM4220 APM4220 C16 56pF C15 0.01uF R11 20K 6.3V 2A/40V 25mR 16V 25mR 16V 30mR 30mR 6.3V 2.5V 25mR 6.3V 6.3V 25mR 25mR 16V + C6 470uF 12V VIN 12V 3V3 RT1 SS2 VREG3 FB4 COMP5 GND6 PHASE7 UGATE 8BOOT 9PGND 10LGATE 11VCC 12DRIVE 13FBL 14 APW7063 1uH 2.2uH 2R2 APM3055L SR24 1uF 0.1uF NCR2 NC C11 0.1uF 1N4148 1KF 3.125KF R12 1.07KF R10 2.32KF 100R C17 0.1uF 4.7uF 1uF C10 4.7uF C14 4.7uF +C13 1000uF +C12 1000uF +C5 470uF +C7 470uF 820R +C9 470uF + C2 470uF /SHDN VIN
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw4 Symbol Parameter Rating Unit VCC VCC to GND 30 V LGATE LGATE to GND 30 V DRIVE DRIVE to GND 30 V UGATE UGATE to GND 30 V VBOOT BOOT to GND 30 V PHASE to GND 30 V Operating Junction Temperature 0~150 o C TSTG Storage Temperature -65 ~ 150 o C TSDR Soldering Temperature (10 Seconds) 300 o C VESD Minimum ESD Rating ±2 KV Symbol Parameter Min. Nom. Max. Unit VCC Supply Voltage 7 12 19 V VBOOT Boot Voltage 26 V Symbol Parameter Value Unit θ JA Junction to Ambient Resistance in free air (SOP -14) 160 oC/W APW7063 Symbol Parameter Test Conditions Min Typ Max Unit SUPPLY CURRENT ICC VCC Nominal Supply UGATE and LGATE Open 3 mA POWER-ON-RESET Rising VCC Threshold 7.0 7.2 7.4 V Falling VCC Threshold 6.6 6.8 7.0 V OSCILLATOR Free Running Frequency RT = OPEN, VCC = 12V 220 250 280 kHz Total Variation 6KΩ < RT to GND < 200KΩ -15 +15 % Ramp Amplitude RT = OPEN 1.7 VP-P
Electrical Characteristics
Unless otherswise specified, these specifications apply over VCC = 12V, VBOOT = 12V, RT = OPEN and TA = 0 ~ 70oC. Typlcal values are at TA = 25oC. Thermal Characteristics Absolute Maximum Ratings Recommended Operating Conditions
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw5 APW7063 Symbol Parameter Test Conditions Min Typ Max Unit REFERENCE VREF Reference Voltage 0.80 V Reference Voltage Tolerance -1 +1 % PWM EEEOR AMPLIFIER DC Gain 75 dB UGATE Duty Range 0 85 % FB Input Current 0.1 uA GATE DRIVERS IUGATE Upper Gate Source VBOOT = 12V, VUGATE = 6V 650 800 mA RUGATE Upper Gate Sink IUGATE = 0.3A 4 8 Ω ILGATE Lower Gate Source VCC = 12V, VLGATE = 6V 550 700 mA RLGATE Lower Gate Sink ILGATE = 0.3A 4 8 Ω TD Dead Time 50 nS LINEAR REGULATOR Reference Voltage 0.8 V Regulation 2 % Output Drive Current VDRIVE = 4V 8 10 12 mA PROTECTION FB Under Voltage Level 50 % FBL Under Voltage Level 50 % OCSET Source Current 250 µA VREG VREG Output Voltage Accuracy VCC > 12V 5.5 6 6.5 V IOUT Output Current Capacity VCC = 12V 20 mA SOFT START and SHUTDOWN TSS Internal Soft-Start Interval CSS = 0uF 2 mS ISS Soft-Start Charge Current 8 10 12 uA Shutdown Threshold COMP Falling 0.4 V Shutdown Hysteresis 50 mV Electrical Characteristics (Cont.) Unless otherswise specified, these specifications apply over VCC = 12V, VBOOT = 12V, RT = OPEN and TA = 0 ~ 70oC. Typlcal values are at TA = 25oC.
Copyright ANPEC Electronics Corp. a 1uF capacitor to GND is recommended for stability. don’t use the VREG for BOOST voltage. and RGND is the resistor connected from FB to GND. the under voltage protection, and shutdown the device. Figure 1. Soft-Start Interval
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw7 COMP (Pin 5) This pin is the output of the error amplifier. Add an external resistor and capacitor network to provide the loop compensation for the PWM converter (see Application Information). Pull this pin below 0.4V will shutdown the controller, forcing the UGATE and LGATE signals to be 0V. A soft start cycle will be initiated upon the release of this pin. GND (Pin 6) Signal ground for the IC. PHASE (Pin 7) A resistor (ROCSET) is connected between this pin and the drain of the low-side MOSFET will determine the over current limit. An internally generated 250uA current source will flow through this resistor, creating a voltage drop. This voltage will be compared with the voltage across the low-side MOSFET. The threshold of the over current limit is therefore given by : An over current condition will cycle the soft start function until the over current condition is removed. Because of the comparator delay time, so the on time of the low-side MOSFET must be longer than 800ns to have the over current protection work. UGATE (Pin 8) This pin provides gate drive for the high-side MOSFET. BOOT (Pin 9) This pin provides the supply voltage to the high side MOSFET driver. For driving logic level N-channel MOSEFT, a bootstrap circuit can be use to create a suitable driver’s supply. 250uA RIR DS(ON)LIMIT OCSET +×= GND OUT OUT R R10.8VV Functional Pin Description (Cont.) PGND (Pin 10) Power ground for the gate diver. Connect the lower MOSFET source to this pin. LGATE (Pin 11) This pin provides the gate drive signal for the low side MOSFET. VCC (Pin 12) This pin provides a supply voltage for the device, when VCC is above the rising threshold 4.2V, It turns on the device is turned on, and conversely, VCC is below the falling threshold 3.9V, the device is turned off. A 1uF decoupling capacitor to GND is recommended. DRIVE (Pin 13) Connect this pin to the gate of an external N-channel MOSFET transistor. This pin provides the gate volt- age for the linear regulator pass transistor. It also pro- vides a means of compensating the linear controller for applications where the user needs to optimize the regulator transient response. FBL (Pin 14) Connect this pin to the output of the linear regulator via a proper sized resistor divider. The voltage at this pin is regulated to 0.8V and the output voltage is de- termined using the following formula : where ROUT is the resistor connected from VOUT to FBL, and RGND is the resistor connected from FBL to GND. This pin also monitores the under-voltage events, if the linear regulator is not used, tie the FBL to VREG.
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw8 Typical Characteristics Time (10ms/div) Time (10ms/div) Time (10ms/div) Time (2ms/div) Power Up Enable (COMP is left open) Shutdown (COMP is pulled to GND) Power Down VCC(10V/div) SS(5V/div) VOUT1(2V/div) VOUT2(2V/div) VCC=VIN1=12V VIN2=5V, CSS=0.1µF VCC(10V/div) SS(5V/div) VOUT1(2V/div) VOUT2(2V/div) VCC=VIN1=12V VIN2=5V, CSS=0.1µF VCC=VIN1=12V VIN2=5V, CSS=0.1µF VOUT2(2V/div) VOUT1(2V/div) COMP(1V/div) SS(5V/div) VCC=VIN1=12V VIN2=5V, CSS=0.1µF VOUT2(2V/div) VOUT1(2V/div) COMP(1V/div) SS(5V/div)
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw9 Typical Characteristics (Cont.) Time (50ns/div) Time (50ns/div) Time (5us/div) Time (5us/div) UGATE Falling UGATE Rising Under Voltage Protection (PWM) Under Voltage Protection (Linear) VCC=2V, VIN=12V LGATE(10V/div) PHASE(10V/div) UGATE(10V/div) VCC=2V, VIN=12V LGATE(10V/div) PHASE(10V/div) UGATE(10V/div) VCC=12,VIN=12V VOUT=3.3V, L=2.2mHIL(10A/div) SS(5V/div) VOUT1 (2V/div) UGATE (10V/div) VCC=12V, VIN=5V VOUT2=2.5V SS(5V/div) VOUT2(2V/div) DRV(5V/div)
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw10 0.2 0.4 0.6 0.8 1.2 0 2 4 6 8 10 12 0.2 0.4 0.6 0.8 1.2 1.4 0 2 4 6 8 10 12 Typical Characteristics (Cont.) Time (20us/div) Time (10us/div) UGATE Source Current (A) UGATE Voltage (V) UGATE Source Current vs. UGATE Voltage UGATE Voltage (V) UGATE Sink Current (A) UGATE Sink Current vs. UGATE Voltage PWM Load Transient Linear Load Transient VCC=12V VIN=12V VOUT=3.3V COUT=470mFx2 ESR=22.5mW L=1.5mH f=400kHz VOUT1(100mV/div) IOUT1(5A/div) VCC=12V VIN=12V VOUT=2.5V COUT=470mF VOUT2(100mV/div) IOUT2(1A/div) VBOOT=12V VBOOT=12V
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw11 100 1000 10000 10 100 1000 0.2 0.4 0.6 0.8 1.2 0 2 4 6 8 10 12 Typical Characteristics (Cont.) LGATE Voltage (V) LGATE Sink Current (A) LGATE Sink Current vs. LGATE Voltage Time (5us/div) Switching Frequency (kHz) RT Resistance (kΩ ) Switching Frequence vs. RT Resistance Over Current Protection 0.2 0.4 0.6 0.8 1.2 1.4 0 2 4 6 8 10 12 LGATE Source Current vs. LGATE Voltage LGATE Voltage (V) LGATE Source Current (A) VCC=12V VCC=12V IL(10A/div) SS(5V/div) UGATE(20V/div) VOUT1(2V/div) RT pull up to 12V RT pull down to GND VCC=12V,VIN=12V, VOUT=2.5V, ROCSET=1kW RDS(ON)=16mW, L=2.2mH, IOUT=15A
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw12 0 2 4 6 8 10 12 100 125 150 0 0.5 1 1.5 2 2.5 3 3.5 4 Typical Characteristics (Cont.) Comp Voltage (V) Sink Current (µA) 100 125 150 1 1.5 2 2.5 3 3.5 4 Comp Voltage (V) Source Current (µA) Comp Source Current vs. Comp Voltage Comp Sink Current vs. Comp Voltage 0 2 4 6 8 10 12 Drive Voltage (V) Drive Voltage (V) Sink Current (mA) Source Current (mA) Drive Sink Current vs. Drive Voltage Drive Source Current vs. Drive Voltage VCC=12V VCC=12V VCC=12V VCC=12V
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw13 5.5 5.75 6.25 6.5 0 5 10 15 20 0.79 0.792 0.794 0.796 0.798 0.8 -40 -20 0 20 40 60 80 100 120 0.5 1.5 2.5 3.5 0 2 4 6 8 10 12 4.5 5.5 0 2 4 6 8 10 12 14 16 18 Typical Characteristics (Cont.) Supply Voltage (V) Load Current (mA) VREG Voltage (V) VREG Voltage vs. Supply Voltage VREG Voltage vs. Load Current Supply Voltage (V) Supply Current (mA) Temperature (°C) Reference Voltage (V) Supply Current vs. Supply Voltage Reference Voltage vs. Temperature VREG Voltage (V) VCC=12V ICC ICC(SHDN)
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw14
Application Information
Component Selection Guidelines Output Capacitor Selection The selection of COUT is determined by the required effective series resistance (ESR) and voltage rating rather than the actual capacitance requirement. Therefore select high performance low ESR capacitors that are intended for switching regulator applications. In some applications, multiple capacitors have to be paralled to achieve the desired ESR value. If tantalum capacitors are used, make sure they are surge tested by the manufactures. If in doubt, consult the capacitors manufacturer. Input Capacitor Selection The input capacitor is chosen based on the voltage rating and the RMS current rating. For reliable operation, select the capacitor voltage rating to be at least 1.3 times higher than the maximum input voltage. The maximum RMS current rating requirement is approximately IOUT/2 , where IOUT is the load current. During power up, the input capacitors have to handle large amount of surge current. If tantalum capacitors are used, make sure they are surge tested by the manufactures. If in doubt, consult the capacitors manufacturer. For high frequency decoupling, a ceramic capacitor between 0.1uF to 1uF can be connected between VCC and ground pin. Inductor Selection The inductance of the inductor is determined by the output voltage requirement. The larger the inductance, the lower the inductor’s current ripple. This will translate into lower output ripple voltage. The ripple current and ripple voltage can be approximated by: IRIPPLE = where Fs is the switching frequency of the regulator. There is a tradeoff exists between the inductor’s ripple current and the regulator load transient response time A smaller inductor will give the regulator a faster load transient response at the expense of higher ripple current and vice versa. The maximum ripple current occurs at the maximum input voltage. A good starting point is to choose the ripple current to be approximately 30% of the maximum output current. Once the inductance value has been chosen, select an inductor that is capable of carrying the required peak current without going into saturation. In some type of inductors, especially core that is make of ferrite, the ripple current will increase abruptly when it saturates. This will result in a larger output ripple voltage. Compensation The output LC filter of a step down converter introduces a double pole, which contributes with – 40dB/decade gain slope and 180 degrees phase shift in the control loop. A compensation network between COMP pin and ground should be added. The simplest loop compensation network is shown in Fig. 5. The output LC filter consists of the output inductor and output capacitors. The transfer function of the LC filter is given by: GAINLC = 1CESRsCLs CESRs1 OUTOUT OUT +××+×× ××+ VIN - VOUT Fs x L VOUT VIN x Δ VOUT = IRIPPLE x ESR The poles and zero of this transfer function are: FLC = OUTCL ××π×2 FESR = OUTCESR ××π×2 The FLC is the double poles of the LC filter, and FESR is the zero introduced by the ESR of the output capacitor.
Copyright ANPEC Electronics Corp.
- Set the pole at the half the switching frequency:
Figure 6. Converter Gain & Frequency the upper MOSFET include an additional transition loss. switching waveform internal of the MOSFET. Temperature” curve of the power MOSFET. will momentarily supply the required transient current. to minimize any droop during load transient condition. The maximum DRIVE voltage is determined by the VCC. regulator is dependent upon the VGS.
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw18
Package Information
SOP – 14 (150mil) Millimeters Inches Dim Min. Max. Min. Max. A 1.477 1.732 0.058 0.068 A1 0.102 0.255 0.004 0.010 B 0.331 0.509 0.013 0.020 C 0.191 0.2496 0.0075 0.0098 D 8.558 8.762 0.336 0.344 E 3.82 3.999 0.150 0.157 e 1.274 0.050 H 5.808 6.215 0.228 0.244 L 0.382 1.274 0.015 0.050 θ ° 0° 8° 0° 8° D Ee B A 0.010 L A 0.015 x45 H E
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw19 Physical Specifications t 25 C to Peak tp Ramp-up tL Ramp-down ts Preheat Tsmax Tsmin T L TP Temperature Time Critical Zone TL to T P Terminal Material Solder -Plated Copper (Solder Material : 90/10 or 63/37 SnPb) , 100%Sn Lead Solderability Meets EIA Specification RSI86 -91, ANSI/J -STD-002 Category 3. Reflow Condition (IR/Convection or VPR Reflow) Classification Reflow Profiles Profile Feature Sn-Pb Eutectic Assembly Pb-Free Assembly Average ramp-up rate (TL to TP) 3°C/second max. 3°C/second max. Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts) 100°C 150°C 60-120 seconds 150°C 200°C 60-180 seconds Time maintained above: - Temperature (TL) - Time (tL) 183°C 60-150 seconds 217°C 60-150 seconds Peak/Classificatioon Temperature (Tp) See table 1 See table 2 Time within 5°C of actual Peak Temperature (tp) 10-30 seconds 20-40 seconds Ramp-down Rate 6°C/second max. 6°C/second max. Time 25°C to Peak Temperature 6 minutes max. 8 minutes max. Notes: All temperatures refer to topside of the package .Measured on the body surface.
Copyright ANPEC Electronics Corp. Table 2. Pb-free Process – Package Classification Reflow Temperatures Table 1. SnPb Entectic Process – Package Peak Reflow Temperatures
Copyright ANPEC Electronics Corp. Rev. A.7 - Nov., 2005 APW7063 www.anpec.com.tw21 Cover Tape Dimensions Application Carrier Width Cover Tape Width Devices Per Reel SOP- 14 24 21.3 2500 Application A B C J T1 T2 W P E 330REF 100REF 13.0 + 0.5 8 1.75 F D D1 Po P1 Ao Ko t SOP-14 (150mil) 7.5 φ 0.50 + 0.1 φ 1.50 (mm) Carrier Tape & Reel Dimensions(Cont.) A J B C Anpec Electronics Corp. Head Office : No.6, Dusing 1st Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 7F, No. 137, Lane 235, Pac Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, R. O. C. Tel : 886-2-89191368 Fax : 886-2-89191369 Customer Service