APW1175 Dual Synchronous DC/DC Controllers with Current Sharing Control Features General Description • Two Operation Modes The APW1175 is a two-phase, synchronous, and voltage - Independent Operation - Two-Phase Operation with Current Sharing mode PWM controller to provide dual channel or single outputs in two distinct operation modes. In independent • mode, the two PWM converters supply two independently regulated voltages by converting a common or two differ- Driving N-Channel MOSFETs • 300kHz Constant Frequency Operation • Built-in Feedback Compensation ent power inputs. In two-phase mode, the two PWM converters supply one regulated voltage with programmable current sharing control by converting a common or two different power inputs. The two-phase mode can supply - Voltage-Mode PWM Control - Fast Transient Response • ±1% VREF Accuracy Over Temperature • Adjustable Output Voltage by an External Resistor Divider • Phase-Shifted Switchers to Minimize Ripple • Current Limit with 50% Fold-Back • Soft-Start and Enable Function • Power-ON Reset (POR) Monitor • Power Good Monitor for Outputs the larger power than that provided each single channel. APW1175 features an internal 300KHz oscillator, VCC Power-On-Reset (POR), an external adjustable soft-start and the programmable output current limit with 50% foldback. The two PWM controllers are 180o out of phase to minimize the input ripple (common power input) and the output ripple (two-phase mode). Pin Description Applications • • • • VR EF 1 20 GN D +IN 2 2 19 PW R GD -IN 2 3 18 -IN 1 Graphics Cards VC C C L2- 4 17 5 16 SS/EN A C L1- DDR Memory C L2+ BST2 6 15 7 14 C L1+ BST1 DH2 8 13 DH1 D L2 9 12 D L1 PGN D 10 11 BSTC SSTL-2 Termination Power Supply Requiring Two Outputs Ordering and Marking Information Package Code K : SO P-20 Tem p. R ange C : 0 to 70°C Handling Code TU : Tube TR : Tape & R eel Lead Free Code L : Lead Free D evice Blank : O rginal Device )29 %# Lead Free Code Handling Code Tem p. R ange Package Code APW 1175 K : APW 1175 XXXXX XXXXX - Date Code ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 1 www.anpec.com.tw APW1175 Block Diagram VREF -IN1 CL1- CL1+ BSTC Master Error Amplifier R BST1 Q S V CL1 PWRGD DH1 R Q 0.125V S V REF 1.25V DL1 0.125V OSC POWER-ON RESET(POR) VCC GND 300KHZ 0.125V soft-start control BST2 4V 25uA S DH2 Q R SS/ENA DL2 V CL2 Slave Error Amplifier +IN2 PGND CL2- -IN2 CL2+ Absolute Maximum Ratings Operating Conditions • VCC to GND . . . . . . . . . . . . . -0.3V ~ 15V • • • • • • PGND to GND . . . . . . . . . . . . ±1V • • • • BST to GND . . . . . . . . . . . . . -0.3V ~ 22V Junction Temperature . . . . . . . 150oC VCC . . . . . . . . . . . . . . . . . . . . 4.2V ~ 15V BST. . . . . . . . . . . . . . . . . . . . . 5V ~ 17V Ambient Temperature Range . . . 0oC to 85oC Junction Temperature Range. . . . 0oC to 125oC Storage Temperature . . . . . . . -65oC ~ 150oC Soldering Temperature . . . 300oC , 10 Seconds Minimum ESD Rating . . . . . . . ±3kV Thermal Characteristics Symbol Parameter Rating Unit R JA Thermal Resistance in Free Air SOIC SOIC(with 3in of Copper) 75 65 °C/W Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 2 www.anpec.com.tw APW1175 Electrical Characteristics Unless otherwise specified, these specifications apply over VCC=4.75~5.25V, GND=PGND=0V, and T)=0~85°C. Typical values refer to T)=25°C. S ym b o l P aram eter AP W 1175 Test C o n d itio n s M in Typ M ax U n it S U P P LY C U R R E N T IC C V C C S upply C urrent IBST C B S T C S upply C urrent I B S T 1,2 B S T 1,2 S upply C urrent P O W E R -O N R E S E T V C C P O R T hreshold Voltage V C C =5~15V , F O S C =300k H z B S T C =5V , D L1,2=O pen, F O S C =300k H z B S T 1,2=10V , D H 1,2=O pen, F O S C =300k H z V C C R ising 9 mA 2.8 mA 1.6 mA 3.6 4.2 V 270 300 330 KHz 80 90 O S C IL L AT O R F OSC O scillator F requency DH1 M axim um D uty C ycle DH2 R am p A m plitude ∆ V OSC E R R O R AM P L IF IE R A OL E rror A m plifier Voltage G ain Input B ias C urrent Input Voltage = 1.25V (-IN 1, +IN 2, -IN 2) R E F E R E N C E V O LTAG E V REF R eference Voltage M easure P in 1 V R E F Load R egulation I R E F = 1m A V R E F Line R egulation V C C = 5~15V 1.238 F old B ack Voltage K nee V O U T =0 V circuit) V 35 dB 0.5 1 µA 1.250 1.262 V mV 0.5 C urrent Lim it Voltage F old B ack C urrent 1.1 3.5 P W M C O N T R O L L E R S G AT E D R IV E R S B S T H -D H =5V D H S ource B S T H -D H =2.5V D H -P G N D =3.5V D H S ink D H -P G N D =1.75V B S T L-D L=5V D L S ource B S T L-D L=2.5V D L-P G N D =3.5V D L S ink D L-P G N D =1.75V D ead Tim e C U R R E N T L IM IT P R O T E C T IO N V CL % 100 (refer to 1 0.5 1 0.5 1 0.5 1 0.5 50 200 60 70 ap plica tio n I=I LIM (refer to application circuit) % A A A A nS 80 50% 1.25 mV I LIM V OUT V S O F T -S TAR T ISS S oft-S tart C urrent V S S =1V 25 µA S oft-S tart Transition S ynchronous P W M 3.3 V Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 3 www.anpec.com.tw APW1175 Electrical Characteristics Cont. Symbol Parameter Test Conditions APW1175 Min Typ Max Unit POWER GOOD Upper -IN1 Threshold 110% VREF Lower IN1 Threshold 90% VREF Upper IN2 Threshold V+IN2 +0.1VREF V Lower IN2 Threshold 90% VREF PWRGD Voltage Low IPWRGD=-5mA 0.8 V Functional Pin Description VREF (Pin 1) Internal 1.25V reference voltage . This pin is internally connected to the positive input of the master channel error amplifier. +IN2 (Pin 2) Positive input of the slave channel error amplifier. Connect this pin to 1.25V reference (Pin 1) for the two independent channel configuration. -IN2, -IN1 (Pin 3, 18) Negative inputs of the slave and master error amplifier. VCC (Pin 4) Connect this pin to 5V~15 V power to provides the bias for the control circuitry. Need a 1uF multi-layer ceramic decoupling capacitor to GND (Pin 20). The voltage at this pin is also monitored for Power-On Reset (POR) purpose. CL2-, CL2+, CL1+, CL1- (Pin 5,6,15,16) Current sense input pins. Connect the positive and negative inputs to output current sense resistor for each channel. A current limit comparator for each channel to limit the output current while the difference voltage between the positive and negaive inputs is greater than the 75mV reference. A RC filter is required for noise rejection. DH2, DH1 (Pin 8,13) High-side MOSFET drivers to provide strong drive current to drive each high-side MOSFET. A small series resistor to the gate of the MOSFET maybe required for each pin. DL2, DL1 (Pin 9,12) Low-side MOSFET drivers to provide strong drive current to drive each low-side MOSFET. A small series resistor to the gate of the MOSFET maybe required for each pin. PGND (Pin 10) Power ground connection. The pin provide the path for return of gate drive currents. BSTC (Pin 11) This pin provide supply voltage to the low-side MOSFET drivers. SS/ENA (Pin 17) Connect a capacitor from this pin to ground.This capacitor, along with an internal 25uA current source, sets the soft-start interval, preventing the outputs from overshoot as well as limiting the input current. Pull this pin to below 1.4V to shutdown the outputs PWRGD (Pin 19) Power good signal output pin. This pin is an open collector output, which is pulled low if the output voltage is outside the power good window. GND (Pin 20) Signal ground for the control circuitry. All voltage levels are measured with respect to this pin. BST2,BST1 (Pin 7,14) Power inputs to the high-side MOSFET drivers. A bootstrap circuit may be used to pump a boot voltage . Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 4 www.anpec.com.tw APW1175 Typical Application 1. Independent Operation +12V +5V +5V 16V 100uF C1 16V 100uF C2 16V 100uF C3 C18 6V 150uF C19 6V 150uF C20 PW RO K 6V 150uF R1 2 .2 R2 D1 1N 4148 D2 2 .2 C22 R13 1N 4148 1uF 2 .2 Q1 R3 C5 1uF R4 2 .2 AP M 4416 Q2 7 .5 u H L1 6V 150uF C13 6V 150uF C14 C12 6V 150uF 6V 150uF C17 100 R10 C16 R9 6V 150uF 220 C15 R8 6V 150uF 124 124 R7 R6 2 .2 C7 0 .2 2 u F C10 0 .2 2 u F R5 C9 C4 10nF 6m C6 10nF C11 10nF R12 C8 100 C23 1nF R11 L2 4 .7 u H 6m AP M 4416 Q4 100 10nF 0 .2 2 u F AP M 4416 Q3 AP M 4416 2 .2 R15 1uF C21 2 .2 R14 2 .5 V / 6 A 1 .8 V / 6 A www.anpec.com.tw 5 Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 GND PW RGD - IN 1 S S /E N A C L1C L1+ BST1 DH1 DL1 BSTC VREF + IN 2 - IN 2 VCC C L2C L2+ BST2 DH2 DL2 PG ND APW1175 Typical Application 2. Two-Phase Operation with Current Sharing Control +12V +5V +5V 16 V 100uF C1 16 V 100uF C2 16 V 100uF C3 C 12 6V 150uF C 13 6V 150uF C 14 PW ROK 6V 150uF R1 2.2 R2 2.2 D1 1N 4148 22k R 11 D2 Q1 R3 C5 1uF R4 APM 4416 Q2 7 .5 u H L1 R6 2.2 R5 C8 15 0 R8 12 4 6m R 10 4 .7 u H L2 R9 APM 4416 Q4 10 0 10nF R7 C4 2.2 C7 6m C6 10nF C 17 10nF 0 .2 2 u F 10 0 2.2 R 14 1uF C 18 0 .2 2 u F APM 4416 Q3 APM 4416 1nF C 16 R 12 1N 4148 1uF C 15 2.2 2.2 R 13 6V 150uF C9 6V 150uF C 10 6V 150uF C 11 2 .7 V / 1 2 A www.anpec.com.tw 6 Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 GND PW RGD - IN 1 S S /E N A C L1C L1+ B ST1 DH1 DL1 BSTC VREF + IN 2 - IN 2 VCC C L2C L2+ B ST2 DH2 DL2 PGND APW1175 Packaging Information SO 300mil ( Reference JEDEC Registration MS-013) D N H GAUGE PLANE E 1 2 3 A B e Millimeters Dim Min. Max. A 2.35 2.65 A1 0.10 0.30 B 0.33 0.51 D See variations E 7.40 e 7.60 1.27BSC L Variations- D Inches Variations- D Variations Min. Max. Dim SO-16 10.10 10.50 A 0.093 0.1043 SO-16 0.398 0.413 SO-18 11.35 11.76 A1 0.004 0.0120 SO-18 0.447 0.463 SO-20 12.60 13 B 0.013 0.020 SO-20 0.496 0.512 SO-24 15.20 15.60 D See variations SO-24 0.599 0.614 SO-28 17.70 18.11 E SO-28 0.697 0.713 SO-14 8.80 9.20 e SO-14 0.347 0.362 Min. Max. Variations Min. Max. 0.2914 0.2992 0.050BSC H 10 10.65 H 0.394 0.419 L 0.40 1.27 L 0.016 0.050 N See variations N See variations 0° φ1 φ1 1 A1 8° Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 7 0° 8° www.anpec.com.tw APW1175 Physical Specifications Terminal Material Lead Solderability Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb) Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3. Reflow Condition (IR/Convection or VPR Reflow) temperature Reference JEDEC Standard J-STD-020A APRIL 1999 Peak temperature 183°C Pre-heat temperature Time Classification Reflow Profiles Convection or IR/ Convection Average ramp-up rate(183°C to Peak) 3°C/second max. 120 seconds max Preheat temperature 125 ± 25°C) 60 150 seconds Temperature maintained above 183°C Time within 5°C of actual peak temperature 10 20 seconds Peak temperature range 220 +5/-0°C or 235 +5/-0°C Ramp-down rate 6 °C /second max. 6 minutes max. Time 25°C to peak temperature VPR 10 °C /second max. 60 seconds 215-219°C or 235 +5/-0°C 10 °C /second max. Package Reflow Conditions pkg. thickness ≥ 2.5mm and all bgas Convection 220 +5/-0 °C VPR 215-219 °C IR/Convection 220 +5/-0 °C pkg. thickness < 2.5mm and pkg. volume ≥ 350 mm³ Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 8 pkg. thickness < 2.5mm and pkg. volume < 350mm³ Convection 235 +5/-0 °C VPR 235 +5/-0 °C IR/Convection 235 +5/-0 °C www.anpec.com.tw APW1175 Reliability test program Test item SOLDERABILITY HOLT PCT TST ESD Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD 78 Description 245°C , 5 SEC 1000 Hrs Bias @ 125 °C 168 Hrs, 100 % RH , 121°C -65°C ~ 150°C, 200 Cycles VHBM > 2KV, VMM > 200V 10ms , IJH > 100mA Carrier Tape t D P Po E P1 Bo F W Ao Ko D1 T2 J C A B T1 Application SOP- 20 A B 330±1 62 ±1.5 C 12.75 + 0.15 F D D1 J T1 T2 2 + 0.6 24.4 + 0.2 2 ± 0.2 Po P1 Ao 11.5 ± 0.1 1.5 +0.1 1.5+ 0.25 4.0 ± 0.1 2.0 ± 0.1 8.2 ± 0.1 Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 9 W 24 + 0.3 -0.1 Bo 13± 0.1 P E 12 + 0.1 1.75± 0.1 Ko t 0.35±0.01 2.5± 0.1 3 www.anpec.com.tw APW1175 Cover Tape Dimensions Application SOP- 20 Carrier Width 24 Cover Tape Width 21.3 Devices Per Reel 1000 Customer Service Anpec Electronics Corp. Head Office : 5F, No. 2 Li-Hsin 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 Copyright ANPEC Electronics Corp. Rev. A.3 - July., 2003 10 www.anpec.com.tw