1X/1.5X/2x Charge Pump White Driver High Efficiency Over Li-ion B

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1X/1.5X/2x Charge Pump White Driver High Efficiency Over Li-ion B

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APW7000
1X/1.5X/2x Charge Pump White Driver
High Efficiency Over Li-ion Battery Discharge Output Current 30mA 2.7V 5.5V Operating voltage Allow Turn Combination LEDs 1x/1.5x/2x Charge Pump Modes Shutdown Current: maximum Input Ripple Internal Soft-start Limits Inrush Current Short Circuit Current Limit Thermal Shutdown Protection Output Overvoltage Protection 16-pin Package Lead Free Available (RoHS Compliant)
General Description
APW7000 high efficiency charge pump white driver; device drives four white LEDs with regulated constant current uniform intensity. supply voltage ranges from 2.7V 5.5V optimized Li-ion battery application. APW7000 operates 1.5x charge pump modes automatically switches charge pump modes depend input voltage maintain required power high power efficiency. APW7000 provides 30mA LED, total 120mA allows several methods such signal CTRL0 dimming. Three control logic pins allow disable enable combination LEDs. supply current only mode, allows device enter shutdown mode with quiescent current. APW7000 switches 1MHz frequency only requires four ceramic capacitors resistor, ensures input current ripple EMI. APW7000 available 16-pin package.
Applications
Cellular Phone White Back light Portable device PDA, Handheld computer
CTRL0 CTRL1 CTRL2 ISET VOUT Metal (Bottom)
outs
ILED1 ILED2 ILED3 ILED4 C110
APW7000 QFN-16 View
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. Aug., 2006 www.anpec.com.tw
APW7000
Ordering Marking Information
APW7000
Lead Free Code Handling Code Temp. Range Package Code Package Code Operating Ambient Temp. Range Handling Code Tray (for only) Lead Free Code Lead Free Device Blank Original Device
APW7000
APW7000 XXXXX
XXXXX Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials 100% matte plate termination finish; which fully compliant with RoHS compatible with both SnPb lead-free soldiering operations. ANPEC lead-free products meet exceed lead-free requirements IPC/JEDEC STD-020C classification lead-free peak reflow temperature.
Block Diagram
C1C2+
1x/1.5x/2x MODE CHARGE PUMP GATE CONTROL LOGIC
VOUT
SOFT-START
CURRENT LIMIT
CTRL0 CTRL1 CTRL2 ON/OFF CONTROL
0.18V 1MHz OSCILLATOR
0.1V MODE SELECT ILED SELECT
CONTROLLED CURRENT MIRROR
1.2V
Error ISET
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
1.2V ILED1 ILED2 ILED3 ILED4
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APW7000
Absolute Maximum Ratings
Symbol VOUT VOUT Parameter Rating -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 +150 Unit
VC1+, VC1-, VC2+, VC2- C1+, C1-, C2+, VILED1-4 VCTRL0/1/2, VISET TSTG TSDR VESD ILED1-4 CTRL0/1/2, ISET Maximum Junction Temperature Storage Temperature Soldering Temperature Seconds) Minimum Rating
Note Stresses beyond absolute maximum rating damage device operating absolute maximum rating conditions extended periods affect device reliability. Note maximum allowable power dissipation (ambient temperature) calculated using: PD(max) ;TJ=125°C. Exceeding maximum allowable power dissipation will result excessive temperature.
Recommended Operating Conditions
Symbol VOUT ILED Input Voltage Output Voltage Current Output Current, VIN>3.5V, VF=3.1V, mode IOUT Output Current, 3.5V<VIN>3.1V, VF=3.1V, 1.5x mode Output Current, 3.1V<VIN>2.8V, VF=3.1V, mode Ambient Temperature Parameter Rating Unit
Thermal Characteristics
Symbol Parameter Thermal Resistance Junction Ambient QFN-16 Value Unit °C/W
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Electrical Characteristics
2.85 5.5V, COUT (ESR 0.03), ILED 20mA, -40°C +85°C, unless otherwise noted. Typical values +25°C.
Symbol VUVLO
Parameter Input Voltage Under-voltage Lockout Threshold Under-voltage Lockout Hysteresis Quiescent Current
Test Conditions
APW7000 Min. Typ. Max.
Unit
falling
1.5x/2x mode switching mode EN=0 ILED-ERR Current Accuracy Current Matching IISET ISET Current ISET Current Ratio VILED-TH ILED Threshold Voltage 1.5x mode mode Transition Hysteresis mode 1.5x mode Transition Hysteresis FOSC Switching Frequency ROUT ISHORT VOVP IILED (1.2V REST) 5mA<ILED<30mA, +25°C VILED falling rising, VIN-VOUT rising, VOUT-VIN mode (VIN-VOUT) IOUT Open Loop VOUT Resistance 1.5x mode (1.5xVIN-VOUT) IOUT mode (2xVIN-VOUT) IOUT Short Circuit Current Limit Threshold Logic Pins High Threshold Logic Pins Threshold Logic Pins High Current Logic Pins Current Thermal Shutdown Thermal Shutdown Hysteresis
Note current accuracy defined (ILED-MEASURED ILED-SET) ILED-SET Note current matching defined (ILED-MAX ILED-MIN) (ILED-MAX ILED-MIN)
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
±1.5
1000
5mA<ILED<30mA (Note 5mA<ILED<30mA (Note
VOUT
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APW7000
Typical Application Circuit
COUT Digital Inputs
ILED1 ILED2 ILED3 ILED4
CTRL0 APW7000 CTRL1 CTRL2 ISET VOUT
C2C2+
Battery
RSET
Function Descriptions
Name CTRL0 CTRL1 CTRL2 ISET VOUT C2C1+ C1GND ILED4 ILED3 ILED2 ILED1
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Function Descriptions Enable Input Pin. active high Control. Pull above 1.3V enable device; pull below 0.3V disable device. On/Off Control Pin. Allow disabling enabling combination LEDs. Current Input. Connect resistor from ISET current. VISET typically 1.2V. Output Voltage Pin. Connect VOUT anode. Connect capacitor from VOUT GND. Supply Voltage Input Pin. Connect capacitor from GND. Bucket Capacitor1 Positive Terminal. Connect capacitor from C2-. Bucket Capacitor1 Negative Terminal. Connect capacitor from C2-. Bucket Capacitor1 Positive Terminal. Connect capacitor from C1-. Bucket Capacitor1 Negative Terminal. Connect capacitor from C1-. Device Ground Pin. LEDs Cathode Connection. current flows from VOUT through into ILED_ pin. charge pump regulates lowest VILED 180mV. Connect ILED_ VOUT used.
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
APW7000
Typical Characteristics
Efficiency Input Voltage
Efficiency Input Voltage
Efficiency
LEDs 20mA VF=3.1V
Efficiency
LEDs 15mA VF=3.1V
Input Voltage
Input Voltage
Efficiency Input Voltage
Efficiency Input Voltage
Efficiency
Efficiency
LEDs 15mA VF=3.3V
LEDs 20mA VF=3.3V
Input Voltage
Input Voltage
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Typical Characteristics (Cont.)
Input Current Input Voltage
LEDs 30mA
Input Current Input Voltage
LEDs 20mA
Input Current (mA)
Input Current (mA)
Input Voltage
Input Voltage
Current Input Voltage
Current Input Voltage
Current (mA)
Current (mA)
LEDs 30mA
LEDs 20mA
Input Voltage
Input Voltage
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Typical Characteristics (Cont.)
Logic Threshold Voltage Input Voltage
Switching Frequency Input Voltage
1200 1150 mode ILED=20mA
Logic Threshold Voltage(V)
high threshold
Switching Frequency (kHz)
1100 1050 1000
threshold
Input Voltage
Input Voltage
Switching Frequency Temperature
1200 1100 mode VIN=4V
Current Temperature
LEDs 20mA VIN=4V
Switching Frequency (kHz)
1000
Current (mA)
Temperature (°C)
Temperature (°C)
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Typical Characteristics (Cont.)
Current Temperature
LEDs 20mA VIN=3.3V
Current Temperature
LEDs 20mA VIN=2.7V
Current (mA)
Current (mA)
Temperature (°C)
Temperature (°C)
Quiescent Current Temperature
mode VIN=4V
Quiescent Current Input Voltage
2.75 LEDs 20mA VF=3.3V
Quiescent Current (mA)
Quiescent Current (mA)
2.25 1.75 1.25 0.75 0.25
Temperature (°C)
Input Voltage(V)
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Typical Characteristics (Cont.)
StartUp mode
StartUp 1.5x mode
(100mA/div)
LEDs 20mA VF=3.1V, VIN=4V
(100mA/div)
LEDs 20mA VF=3.1V, VIN=3.3V
VOUT (2V/div)
VOUT (2V/div)
(5V/div)
(5V/div)
ILED (10mA/div)
ILED (10mA/div)
TIME (0.1ms/div)
TIME (0.1ms/div)
StartUp mode
Dimming mode
ILED (10mA/div)
LEDs 20mA VF=3.1V, VIN=2.7V (100mA/div)
VOUT (2V/div)
VOUT (1V/div)
(5V/div)
LEDs 20mA VF=3.1V, VIN=4V f=200Hz
CTRL0 (2V/div)
ILED (10mA/div)
TIME (0.1ms/div)
TIME (2ms/div)
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Typical Characteristics (Cont.)
Dimming 1.5x mode
Dimming mode
ILED (10mA/div)
ILED (10mA/div)
(1V/div)
VOUT (1V/div)
CTRL0 (1V/div)
LEDs 20mA, VF=3.1V VIN=3.3V, f=200Hz
CTRL0 (1V/div)
LEDs 20mA, VF=3.1V, VIN=2.7V, f=200Hz
TIME (2ms/div)
TIME (2ms/div)
Even with Open Circuit
Line Transient Response 1.5x mode
(1V/div)
ILED (10mA/div)
LEDs 20mA, VF=3.1V VIN=3.2V 3.8V
(1V/div)
VOUT (1V/div)
(1V/div) LEDs 20mA VF=3.1V, VIN=4V LED1 open
ILED (20mA/div)
TIME (0.2ms/div)
TIME (0.1ms/div)
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Typical Characteristics (Cont.)
Line Transient Response 1.5x mode
(1V/div)
LEDs 20mA, VF=3.1V VIN=2.8V 3.4V
VOUT (1V/div)
ILED (20mA/div)
TIME (0.1ms/div)
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
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APW7000
Function Descriptions
Soft-Start APW7000 provides soft-start function limit inrush current during startup. When input voltage supplied device, exceeds UVLO voltage, output capacitor charged directly from input with limited current source. Approximate 100us after output voltage approaches input voltage, device starts provide programmed current determines which 1.5x mode required. When programmed current reached with mode, soft-start completed device operates mode. When programmed current cannot reached, charge pump goes into 1.5x mode. 1.5x mode charge pump cannot suffice current need, charge pump will switch mode. 7000 provides three logic input pins enable disable combination LEDs. Table1 shows truth table logic pins. channels Mode Transition APW7000 operates 1.5x charge pump modes automatically switches charge pump modes depend input voltage main tain required power high power efficiency. APW7000 operates mode, VOUT pulled VIN. When decreases, ILED will decease maintain regulated current. Until VILED below 100mV, device will switch 1.5x mode. 1.5x mode ILED regulated 18V, output voltage VF+0.18V. continues decrease until VILED below 100mV again, device will switch mode. When rises reaches approximately VOUT-300mV, APW7000 switches back 1.5x mode. continues rise reaches approximately VOUT +300mV, APW7000 switches back mode. charge pump enough suffice White Li-ion battery application. used, connecting ILED pins VOUT turn respective channels. where forward voltage IOUT output current ROUT1X output impedance mode ROUT1.5X output impedance 1.5x mode Control Logic Pins VTRANS1X 0.1V (IOUT ROUT1X) VTRANS1.5X 0.1V (IOUT APW7000 ensures that mode long possible increase efficiency extend operating range using mode. transition voltages from 1.5x 1.5x given
ROUT1.5X)]
Control Logic CTRL2 CTRL1 CTRL0
LED4
Status LED3 LED2
LED1
Table1. Truth Table Control Logic Pins Current Setting Connect resistor from ISET current. ISET voltage typically 1.2V, current typically times current through ISET resistor. current given
RSET
1.2V ILED
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Copyright ANPEC Electronics Corp. Rev. Aug., 2006
APW7000
Function Descriptions (Cont.)
Current Setting (Cont.) APW7000 provides 30mA current device current matching between currents current accuracy ±8%. high accuracy required, using precision surface mount resistor need. Shutdown/Enable Pull above 1.3V enable device pull below 0.3V disable device. shutdown mode, internal control circuits turned quiescent current below 2uA. When device exits shutdown mode, output soft-start function input voltage startup.
ILED (mA)
RSET 16.5
Over-Voltage Protection LEDs failed unused channel connected VOUT, charge pump mode will into mode output voltage will pumped times input voltage. output voltage over 5.5V, over-voltage protection circuit will limit output voltage approximately 5.5V.
Table2. RSET Value Selection
RSET (Ohm) ILED (mA)
Figure1. RSET Value Current
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APW7000
Application Information
Capacitor Selection lower input output voltage ripples, both input output capacitors should larger values lower capacitors. However, larger output capacitor values will increase soft-start time. lower charge pump flying capacitors values improve efficiency, lower capacitor values limit LED' currents input voltage. recommended that variation over temperature, such ceramic capacitors with value input capacitor, output capacitor, charge pump flying capacitors.
Current (mA)
APW7000 CTRL0 CTRL1 CTRL2
Figure2. Dimming Application Circuit
LED=20mA VIN=2.7V, mode
Brightness Control dimming using CTRL0, CTRL1, CTRL2 first method dimming LEDs apply signal into CTRL0, CTRL1, CTRL2 pins. Figure2 shows application circuit. average current proportional signal duty cycle. Note that frequency signal will affect minimum dimming duty. Figure3 shows current dimming frequency dimming duty, recommend dimming frequency below 10kHz. average current calculated following equation:
toff ILED (max) toff
f=100Hz
f=10kHz f=40kHz f=50kHz
Dimming Duty
Figure3. Dimming Frequency Current Analog dimming with analog voltage second method dimming LEDs apply voltage through resistor into ISET pin. variation current proportional variation analog voltage. resistor values chosen correctly, analog control voltage varies output current from full current. Figure4 shows application circuit. equations below calculate required resistor values:
ILED
Where: ILED(max) programmed current ISET toff time signal time signal
Copyright ANPEC Electronics Corp. Rev. Aug., 2006
VADJ VISET RSET VISET RSET VISET RSET RSET
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APW7000
Application Information (Cont.)
Brightness Control (Cont.) Where: VISET 1.2V VADJ analog voltage dimming LEDs RSET equivalent RSET resistance (see Table Layout Consideration APW7000 high frequency charge pump white driver requires some care when laying printed circuit board. metal bottom package must soldered connected plane backside through several thermal vias. Place CIN,
APW7000 ISET VADJ
COUT, close possible reducing switching noise.
Figure4. Analog Voltage Dimming Application Circuit Digital dimming with external NMOS transistors third method dimming LEDs change equivalent resistance RSET with external NMOS transistors. equivalent resistance parallel combinations always connected selected minimum current. Figure5 shows application circuit.
APW7000 ISET
Figure5. Digital Dimming Application Circuit
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APW7000
Packaging Information
QFN-16
Millimeters Min. 0.76 0.00 0.57 0.20 REF. 3.90 3.90 0.25 2.05 2.05 0.650 0.50 0.60 0.020 4.10 4.10 0.35 2.15 2.15 0.154 0.154 0.010 0.140 0.140 Max. 0.84 0.04 0.63 Min. 0.030 0.00 0.022
Inches Max. 0.033 0.0015 0.025 0.008 REF. 0.161 0.161 0.014 0.086 0.086 0.026 0.024
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APW7000
Physical Specifications
Terminal Material Lead Solderability Solder-Plated Copper (Solder Material 90/10 63/37 SnPb), 100%Sn Meets Specification RSI86-91, ANSI/J-STD-002 Category
Reflow Condition
(IR/Convection Reflow)
Critical Zone
Ramp-up
Temperature
Tsmax
Tsmin Ramp-down Preheat
Peak
Classification Reflow Profiles
Profile Feature Average ramp-up rate Preheat Temperature (Tsmin) Temperature (Tsmax) Time (min max) (ts) Time maintained above: Temperature (TL) Time (tL) Peak/Classificatioon Temperature (Tp) Time within actual Peak Temperature (tp) Ramp-down Rate Sn-Pb Eutectic Assembly 3°C/second max. 100°C 150°C 60-120 seconds 183°C 60-150 seconds table 10-30 seconds Pb-Free Assembly 3°C/second max. 150°C 200°C 60-180 seconds 217°C 60-150 seconds table 20-40 seconds
6°C/second max. 6°C/second max. minutes max. minutes max. Time 25°C Peak Temperature Notes: temperatures refer topside package .Measured body surface. (mm)
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APW7000
Classification Reflow Profiles (Cont.)
Table SnPb Entectic Process Package Peak Reflow Temperatures Package Thickness Volum Volume <350 <2.5 +0/-5°C +0/-5°C +0/-5°C +0/-5°C Table Pb-free Process Package Classification Reflow Temperatures Package Thickness Volume Volume Volume <350 350-2000 >2000 <1.6 +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* *Tolerance: device manufacturer/supplier shall assure process compatibility including stated classification temperature (this means Peak reflow temperature +0°C. example 260°C+0°C) rated level.
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 @125°C Hrs, 100%RH, 121°C -65°C~150°C, Cycles VHBM 2KV, 200V 10ms, 100mA
Shipping Tray
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APW7000
Shipping Tray(Cont.)
Customer Service
Anpec Electronics Corp. Head Office No.6, Dusing 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
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1X/1.5X/2x Charge Pump White Driver High Efficiency Over Li-ion B

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