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APW1175
Dual Synchronous DC/DC Controllers with Current Sharing Control
Operation Modes Independent Operation Two-Phase Operation with Current Sharing
General Description
APW1175 two-phase, synchronous, voltage mode controller provide dual channel single outputs distinct operation modes. independent mode, converters supply independently regulated voltages converting common different power inputs. two-phase mode, converters supply regulated voltage with programmable current sharing control converting common different power inputs. two-phase mode supply larger power than that provided each single channel. APW1175 features internal 300KHz oscillator, Power-On-Reset (POR), external adjustable soft-start programmable output current limit with foldback. controllers 180o phase minimize input ripple (common power input) output ripple (two-phase mode).
Driving N-Channel MOSFETs
300kHz Constant Frequency Operation Built-in Feedback Compensation
Voltage-Mode Control Fast Transient Response
VREF Accuracy Over Temperature Adjustable Output Voltage External Resistor Divider Phase-Shifted Switchers Minimize Ripple Current Limit with Fold-Back Soft-Start Enable Function Power-ON Reset (POR) Monitor Power Good Monitor Outputs
Description
BST2
Applications
Graphics Cards Memory SSTL-2 Termination Power Supply Requiring Outputs
SS/EN BST1 BSTC
Ordering Marking Information
Lead Free Code Handling Code ange Package Code Package Code P-20 ange 70°C Handling Code Tube Tape Lead Free Code Lead Free evice Blank rginal Device XXXXX Date Code
1175
1175 XXXXX
ANPEC reserves right make changes improve reliability manufacturability without notice, advise customers obtain latest version relevant information verify before placing orders. Copyright ANPEC Electronics Corp. Rev. July., 2003 www.anpec.com.tw
APW1175
Block Diagram
VREF -IN1 CL1CL1+ BSTC
Master Error Amplifier
BST1
PWRGD
1.25V
0.125V
0.125V
300KHZ
POWER-ON RESET(POR)
0.125V soft-start control
25uA
BST2
PGND
SS/ENA
Slave Error Amplifier
+IN2
-IN2
CL2-
CL2+
Absolute Maximum Ratings
-0.3V PGND -0.3V Junction Temperature 150oC Storage Temperature -65oC 150oC Soldering Temperature 300oC Seconds Minimum Rating ±3kV
Operating Conditions
4.2V BST. Ambient Temperature Range 85oC Junction Temperature Range. 125oC
Thermal Characteristics
Symbol Parameter Thermal Resistance Free SOIC SOIC(with Copper) Rating Unit °C/W
Copyright ANPEC Electronics Corp. Rev. July., 2003
www.anpec.com.tw
APW1175
Electrical Characteristics
Unless otherwise specified, these specifications apply over VCC=4.75~5.25V, GND=PGND=0V, T)=0~85°C. Typical values refer T)=25°C.
aram eter Test itio 1175
IBST upply urrent upply urrent upply urrent =5~15V =300k L1,2=O pen, =300k 1,2=10V 1,2=O pen, =300k ising
hreshold Voltage scillator requency axim ycle
plitude rror plifier Voltage Input urrent Input Voltage 1.25V (-IN LTAG eference Voltage Load egulation Line egulation easure 5~15V circuit) (refer plica 1.25 1.238
1.250
1.262
ource =2.5V =3.5V =1.75V L=5V ource L=2.5V =3.5V =1.75V urrent Voltage urrent Voltage oft-S tart urrent oft-S tart Transition
Copyright ANPEC Electronics Corp. Rev. July., 2003
(refer application circuit) ynchronous
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APW1175
Electrical Characteristics Cont.
Symbol POWER GOOD Upper -IN1 Threshold Lower Threshold Upper Threshold Lower Threshold PWRGD Voltage IPWRGD=-5mA 110% V+IN2 +0.1VREF VREF VREF VREF Parameter Test Conditions APW1175 Unit
Functional Description
VREF (Pin Internal 1.25V reference voltage This internally connected positive input master channel error amplifier. +IN2 (Pin Positive input slave channel error amplifier. Connect this 1.25V reference (Pin independent channel configuration. -IN2, -IN1 (Pin Negative inputs slave master error amplifier. (Pin Connect this 5V~15 power provides bias control circuitry. Need multi-layer ceramic decoupling capacitor (Pin 20). voltage this also monitored Power-On Reset (POR) purpose. CL2-, CL2+, CL1+, CL1- (Pin 5,6,15,16) Current sense input pins. Connect positive negative inputs output current sense resistor each channel. current limit comparator each channel limit output current while difference voltage between positive negaive inputs greater than 75mV reference. filter required noise rejection.
BST2,BST1 (Pin 7,14) Power inputs high-side MOSFET drivers. bootstrap circuit used pump boot voltage
Copyright ANPEC Electronics Corp. Rev. July., 2003 www.anpec.com.tw
DH2, (Pin 8,13) High-side MOSFET drivers provide strong drive current drive each high-side MOSFET. small series resistor gate MOSFET maybe required each pin. DL2, (Pin 9,12) Low-side MOSFET drivers provide strong drive current drive each low-side MOSFET. small series resistor gate MOSFET maybe required each pin. PGND (Pin Power ground connection. provide path return gate drive currents. BSTC (Pin This provide supply voltage low-side MOSFET drivers. SS/ENA (Pin Connect capacitor from this ground.This capacitor, along with internal 25uA current source, sets soft-start interval, preventing outputs from overshoot well limiting input current. Pull this below 1.4V shutdown outputs PWRGD (Pin Power good signal output pin. This open collector output, which pulled output voltage outside power good window. (Pin Signal ground control circuitry. voltage levels measured with respect this pin.
4416
+12V
100uF 4148 4416 100uF 100uF
150uF
150uF
150uF
BST1 BSTC
10nF
VREF BST2
10nF
10nF 10nF 4416
150uF
150uF
150uF
Typical Application
150uF 150uF 150uF 4148
Independent Operation
APW1175
4416
Copyright ANPEC Electronics Corp. Rev. July., 2003
www.anpec.com.tw
+12V
100uF 4148 100uF 100uF
4416
4416
10nF 150uF
150uF
150uF
BSTC
Two-Phase Operation with Current Sharing Control
VREF PGND
10nF
10nF 4416
Typical Application
150uF 150uF 150uF 4148
APW1175
4416
Copyright ANPEC Electronics Corp. Rev. July., 2003
www.anpec.com.tw
APW1175
Packaging Information
300mil Reference JEDEC Registration MS-013)
GAUGE PLANE
Millimeters Min. 2.35 0.10 0.33 Max. 2.65 0.30 0.51
Variations- Variations SO-16 SO-18 SO-20 SO-24 SO-28 SO-14 Min. 10.10 11.35 12.60 15.20 17.70 8.80 Max. 10.50 11.76 15.60 18.11 9.20
Inches Min. 0.093 0.004 0.013 Max. 0.1043 0.0120 0.020
Variations- Variations SO-16 SO-18 SO-20 SO-24 SO-28 SO-14 Min. 0.398 0.447 0.496 0.599 0.697 0.347 Max. 0.413 0.463 0.512 0.614 0.713 0.362
variations 7.40 7.60
variations 0.2914 0.2992
1.27BSC 0.40 10.65 1.27
0.050BSC 0.394 0.016 0.419 0.050
variations
variations
Copyright ANPEC Electronics Corp. Rev. July., 2003
www.anpec.com.tw
APW1175
Physical Specifications
Terminal Material Lead Solderability Solder-Plated Copper (Solder Material 90/10 63/37 SnPb) Meets Specification RSI86-91, ANSI/J-STD-002 Category
Reflow Condition
(IR/Convection Reflow)
Reference JEDEC Standard J-STD-020A APRIL 1999
temperature
Peak temperature 183°C Pre-heat temperature
Classification Reflow Profiles
Convection Convection Average ramp-up rate(183°C Peak) 3°C/second max. seconds Preheat temperature 25°C) seconds Temperature maintained above 183°C Time within actual peak temperature seconds Peak temperature range +5/-0°C +5/-0°C Ramp-down rate /second max. minutes max. Time 25°C peak temperature
Time
/second max. seconds 215-219°C +5/-0°C /second max.
Package Reflow Conditions
pkg. thickness 2.5mm bgas Convection +5/-0 215-219 IR/Convection +5/-0 pkg. thickness 2.5mm pkg. volume pkg. thickness 2.5mm pkg. volume Convection +5/-0 +5/-0 IR/Convection +5/-0
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Copyright ANPEC Electronics Corp. Rev. July., 2003
APW1175
Reliability test program
Test item SOLDERABILITY HOLT 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 Description 245°C 1000 Bias Hrs, 121°C -65°C 150°C, Cycles VHBM 2KV, 200V 10ms 100mA
Carrier Tape
Application SOP-
330±1
±1.5
12.75 0.15
24.4
-0.1
1.75± 0.35±0.01 2.5±
11.5 +0.1 1.5+ 0.25
Copyright ANPEC Electronics Corp. Rev. July., 2003
www.anpec.com.tw
APW1175
Cover Tape Dimensions
Application SOP- Carrier Width Cover Tape Width 21.3 Devices Reel 1000
Customer Service
Anpec Electronics Corp. Head Office Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. 886-3-5642000 886-3-5642050 Taipei Branch 137, Lane 235, Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, 886-2-89191368 886-2-89191369
Copyright ANPEC Electronics Corp. Rev. July., 2003
www.anpec.com.tw
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