APW7000QAI-TRG

APW7000 ANPEC | Alldatasheet

Document overview

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Technical content

Features

• ±1.5% LED Current Matching
• High Efficiency Up to 90% Over Li-ion Battery Discharge
• Output Current Up to 30mA Per LED
• 2.7V to 5.5V Operating Voltage
• Allow to Turn On or Off a Combination of LEDs
• 1x/1.5x/2x Charge Pump Modes
• Low Shutdown Current: 2mA Maximum
• Low Input Ripple and EMI
• Internal Soft-Start Limits Inrush Current
• Short Circuit Current Limit
• Thermal Shutdown Protection
• Output Over-Voltage Protection
• 16-Pin QFN Package
• Lead Free and Green Devices Available (RoHS Compliant)

Applications

The APW7000 is a high efficiency charge pump white LED driver; the device drives up to four white LEDs with regulated constant current for uniform intensity. The sup- ply voltage ranges from 2.7V to 5.5V and it is optimized for a Li-ion battery application. The APW7000 operates in 1x, 1.5x, and 2x charge pump modes and automatically switches the charge pump modes depend on the input voltage to maintain the required power for high power efficiency. The APW7000 provides up to 30mA per LED, for a total of 120mA and allows several methods such as a PWM signal on the CTRL0 pin for LED dimming. Three control logic pins allow to disable or enable a combina- tion of LEDs. The supply current is only 2mA in 2x mode, and the EN pin allows the device to enter shutdown mode with 2µA quiescent current. The APW7000 switches at 1MHz frequency and only requires four 1 µF ceramic ca- pacitors and one resistor, and ensures low input current ripple and EMI. The APW7000 is available in a 16-pin QFN package.

• Cellular Phone White LED Back Light
• Portable Device
• PDA, Handheld Computer
• DSC Pin Configuration QFN4x4-16 (Top View) 65 7 8 ILED2 ILED1 CTRL1 CTRL0 EN ISET CTRL2 VOUT ILED3 ILED4 C1+ C1- GND C2+ C2- VIN 1516 14 13 Metal GND Pad (Bottom)

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw2 Ordering and Marking Information Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which are fully compliant with RoHS. 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. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight). Symbol Parameter Rating Unit VOUT VOUT to GND -0.3 to +6 V VIN VIN to GND -0.3 to +6 V VC1+, VC1-, VC2+, VC2- C1+, C1-, C2+, C2- to GND -0.3 to +6 V VILED1-4 ILED1-4 to GND -0.3 to +6 V VCTRL0/1/2, VEN CTRL0/1/2, EN to GND -0.3 to +6 V VISET ISET to GND -0.3 to 2 V TJ Maximum Junction Temperature +150 °C TSTG Storage Temperature -65 ~ 150 °C TSDR Maximum Lead Soldering Temperature, 10 Seconds 260 °C Absolute Maximum Ratings (Note 1, 2) Note 1: Stresses beyond the absolute maximum rating may damage the device and operating in the absolute maximum rating conditions for extended periods may affect device reliability. Note 2: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(max) = (TJ – TA) / θ JA ;TJ=125°C. Exceeding the maximum allowable power dissipation will result in excessive die temperature. Thermal Characteristics Symbol Parameter Typical Value Unit R θ JA Thermal Resistance-Junction to Ambient QFN4x4-16 40 °C/W APW7000 Handling Code Temperature Range Package Code Package Code QA : QFN4x4-16 Operating Ambient Temperature Range I : -40 to 85 oC Handling Code TR : Tape & Reel Assembly Material G : Halogen and Lead Free Device Assembly Material APW7000 QA : APW7000 XXXXX XXXXX - Date Code

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw3 Recommended Operating Conditions Symbol Parameter Rating Unit VIN Input Voltage 2.8 to 4.5 V VOUT Output Voltage 3 to 4 V ILED LED Current 5 to 30 mA Output Current, VIN>3.5V, VF=3.1V, 1x mode 180 Output Current, 3.5V<VIN>3.1V, VF=3.1V, 1.5x mode 120 IOUT Output Current, 3.1V<VIN>2.8V, VF=3.1V, 2x mode 90 mA TA Ambient Temperature -40 to 85 °C

Electrical Characteristics

Symbol Parameter Test Conditions Min. Typ. Max. Unit VIN Input Voltage 2.7 - 5.5 V VUVLO Under-voltage Lockout Threshold VIN falling 2.2 2.4 2.6 V Under-voltage Lockout Hysteresis - 50 - mV In 1.5x/2x mode - 2 4 mA No switching in 1x mode - 0.5 1 mA IQ Quiescent Current EN=0 - 0.1 2 µA ILED-ERR LED Current Accuracy 5mA<ILED<30mA (Note 3) - ±2 ±8 % Current Matching 5mA<ILED<30mA (Note 4) - ±1.5 ±5 % IISET ISET Current 5 - 1000 µA ISET to LED Current Ratio IILED / (1.2V / REST) 5mA<ILED<30mA, TA = +25°C 370 400 420 VILED-TH ILED Threshold Voltage VILED falling - 100 - mV 1.5x mode to 1x mode Transition Hysteresis VIN rising, VIN-VOUT - 300 - mV 2x mode to 1.5x mode Transition Hysteresis VIN rising, VOUT-VIN - 300 - mV FOSC Switching Frequency 0.8 1 1.2 MHz 1x mode (VIN-VOUT) / IOUT - 1.6 3 1.5x mode (1.5xVIN-VOUT) / IOUT - 7 12 ROUT Open Loop VOUT Resistance 2x mode (2xVIN-VOUT) / IOUT - 16 28 Ω ISHORT Short Circuit Current Limit VOUT < 1V - 40 - mA VOVP OVP Threshold 5 5.5 6 VIH Logic Pins High Threshold 1.3 0.7 - V VIL Logic Pins Low Threshold - 0.6 0.3 V IIH Logic Pins High Current VIH = VIN - - 1 µA IIL Logic Pins Low Current VIL = GND - - 1 µA Thermal Shutdown - 150 - °C Thermal Shutdown Hysteresis - 20 - °C VIN = 2.85 to 5.5V, CIN = COUT = C1 = C2 = 1µF (ESR = 0.03Ω ), ILED = 20mA, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Note 3: LED current accuracy is defined as: ± (ILED-MEASURED - ILED-SET) / ILED-SET Note 4: LED current matching is defined as: ± (ILED-MAX - ILED-MIN) / (ILED-MAX + ILED-MIN)

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw4 Typical Operating Characteristics 100 2.5 3 3.5 4 4.5

4 LEDs at 20mA

VF=3.1V Input Voltage (V) Efficiency vs. Input Voltage Efficiency (%) 100 2.5 3 3.5 4 4.5

4 LEDs at 15mA

VF=3.1V Input Voltage (V) Efficiency (%) Efficiency vs. Input Voltage 100 2.5 3 3.5 4 4.5 VF=3.3V Efficiency vs. Input Voltage Input Voltage (V) Efficiency (%) 100 2.5 3 3.5 4 4.5 VF=3.3V Input Voltage (V) Efficiency (%) Efficiency vs. Input Voltage 100 120 140 160 180 200 220 240 260 2.5 3 3.5 4 4.5 5

4 LEDs at 30mA

Input Voltage (V) Input Current vs. Input Voltage Input Current (mA) 100 120 140 160 180 200 2.5 3 3.5 4 4.5 5 Input Current vs. Input Voltage Input Voltage (V) Input Current (mA)

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw5 2.5 3 3.5 4 4.5 5 5.5 2.5 3 3.5 4 4.5 5 5.5 LED Current vs. Input Voltage Input Voltage (V) LED Current (mA) Input Voltage (V) LED Current (mA) LED Current vs. Input Voltage Typical Operating Characteristics (Cont.) 800 850 900 950 1000 1050 1100 1150 1200 2.5 3 3.5 4 4.5 in 2x mode ILED=20mA 0.7 0.8 0.9 1.1 1.2 2.5 3 3.5 4 4.5 5 5.5 high threshold low threshold Input Voltage (V) Logic Threshold Voltage vs. Input Voltage Logic Threshold Voltage(V) Switching Frequency vs. Input Voltage Input Voltage (V) Switching Frequency (kHz) 500 600 700 800 900 1000 1100 1200 -40 -20 0 20 40 60 80 100 120 140 in 2x mode VIN=4V -40 -20 0 20 40 60 80 100 120 140 VIN=4V Switching Frequency vs. Temperature Temperature (°C) Switching Frequency (kHz) Temperature (°C) LED Current (mA) LED Current vs. Temperature

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw6 Typical Operating Characteristics (Cont.) -40 -20 0 20 40 60 80 100 120 140 VIN=2.7V -40 -20 0 20 40 60 80 100 120 140 VIN=3.3V Temperature (°C) LED Current vs. Temperature LED Current (mA) LED Current vs. Temperature Temperature (°C) LED Current (mA) 0.25 0.5 0.75 1.25 1.5 1.75 2.25 2.5 2.75 VF=3.3V 200 250 300 350 400 -40 -20 0 20 40 60 80 100 120 140 in 1x mode VIN=4V Quiescent Current vs. Temperature Temperature (°C) Quiescent Current (mA) Input Voltage(V) Quiescent Current (mA) Quiescent Current vs. Input Voltage IIN (100mA/div) VOUT (2V/div) EN (5V/div) ILED (10mA/div) VF=3.1V, VIN=3.3V IIN (100mA/div) VOUT (2V/div) EN (5V/div) ILED (10mA/div) VF=3.1V, VIN=4V TIME (0.1ms/div) StartUp in 1x Mode StartUp in 1.5x Mode TIME (0.1ms/div)

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw7 Typical Operating Characteristics (Cont.) VOUT (1V/div) CTRL0 (2V/div) ILED (10mA/div) VF=3.1V, VIN=4V f=200Hz IIN (100mA/div) VOUT (2V/div) EN (5V/div) ILED (10mA/div) VF=3.1V, VIN=2.7V StartUp in 2x Mode TIME (0.1ms/div) TIME (2ms/div) Dimming in 1x Mode VOUT (1V/div) CTRL0 (1V/div) ILED (10mA/div) 4 LEDs at 20mA, VF=3.1V, VIN=2.7V, f=200Hz VOUT (1V/div) CTRL0 (1V/div) ILED (10mA/div) 4 LEDs at 20mA, VF=3.1V VIN=3.3V, f=200Hz TIME (2ms/div) Dimming in 1.5x Mode Dimming in 2x Mode TIME (2ms/div) VOUT (1V/div) VIN (1V/div) ILED (20mA/div) 4 LEDs at 20mA, VF=3.1V VIN=3.2V to 3.8V VOUT (1V/div) VIN (1V/div) ILED (10mA/div) VF=3.1V, VIN=4V LED1 is open OVP Even with LED Open Circuit TIME (0.2ms/div) TIME (0.1ms/div) Line Transient Response in 1x to 1.5x Mode

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw8 VOUT (1V/div) VIN (1V/div) ILED (20mA/div) 4 LEDs at 20mA, VF=3.1V VIN=2.8V to 3.4V TIME (0.1ms/div) Line Transient Response in 1.5x to 2x Mode Typical Operating Characteristics (Cont.) Pin Description PIN NO. NAME FUNCTION 1 EN Enable Input Pin. The EN pin is an active high Control. Pull EN pin above 1.3V to enable the device; pull EN pin below 0.3V to disable the device. 2 CTRL0 LED On/Off Control Pin. Allow disabling or enabling a combination of LEDs. 3 CTRL1 LED On/Off Control Pin. Allow disabling or enabling a combination of LEDs. 4 CTRL2 LED On/Off Control Pin. Allow disabling or enabling a combination of LEDs. 5 ISET LED Current Set Input. Connect a resistor from ISET to GND to set the LED current. VISET is typically 1.2V. 6 VOUT Output Voltage Pin. Connect VOUT to the LED anode. Connect a 1µF capacitor from VOUT to GND. 7 VIN Supply Voltage Input Pin. Connect a 1µF capacitor from VIN to GND. 8 C2+ Bucket Capacitor1 Positive Terminal. Connect a 1µF capacitor from C2+ to C2-. 9 C2- Bucket Capacitor1 Negative Terminal. Connect a 1µF capacitor from C2+ to C2-. 10 C1+ Bucket Capacitor1 Positive Terminal. Connect a 1µF capacitor from C1+ to C1-. 11 C1- Bucket Capacitor1 Negative Terminal. Connect a 1µF capacitor from C1+ to C1-. 12 GND Device Ground Pin. 13 ILED4 LEDs Cathode Connection. The LED current flows from VOUT through LED into ILED_ pin. The charge pump regulates the lowest VILED to 180mV. Connect ILED_ pin to VOUT if the LED is not used. 14 ILED3 LEDs Cathode Connection. The LED current flows from VOUT through LED into ILED_ pin. The charge pump regulates the lowest VILED to 180mV. Connect ILED_ pin to VOUT if the LED is not used. 15 ILED2 LEDs Cathode Connection. The LED curre nt flows from VOUT through LED into ILED_ pin. The charge pump regulates the lowest VILED to 180mV. Connect ILED_ pin to VOUT if the LED is not used. 16 ILED1 LEDs Cathode Connection. The LED current flows from VOUT through LED into ILED_ pin. The charge pump regulates the lowest VILED to 180mV. Connect ILED_ pin to VOUT if the LED is not used.

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw9 Block Diagram Error Amp 1x/1.5x/2x MODE CHARGE PUMP AND GATE CONTROL LOGIC - + 1.2V CONTROLLED CURRENT MIRROR MODE SELECT AND MIN ILED SELECT ISET CTRL1 CTRL0 VIN GND C1+ C1- C2+ C2- VOUT ILED1 ILED2 ILED3 ILED4 CURRENT LIMIT 0.1V POR & SOFT-START 1MHz OSCILLATOR EN CTRL2 LED ON/OFF CONTROL 0.18V 1.2V Typical Application Circuit APW7000 CIN 1µF 1µF C2+VINVOUTISET ILED4ILED3ILED2ILED1 C2- C1+ C1- GND CTRL2 CTRL1 CTRL0 EN 1µF Battery Digital Inputs RSET 5 6 7 8 16 15 14 13 COUT 1µF

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw10 Function Description Soft-Start The APW7000 provides the soft-start function to limit the inrush current during startup. When the input voltage is supplied to the device and exceeds the UVLO voltage, the output capacitor is charged directly from input with a limited current source. Approximate 100 µs after the out- put voltage approaches the input voltage, the device starts to provide the programmed LED current and determines which of 1x, and 1.5x, or 2x mode is required. When the programmed LED current can be reached with 1x mode, the soft-start is completed and the device operates in 1x mode. When the programmed LED current cannot be reached, the charge pump goes into 1.5x mode. If the 1.5x mode charge pump cannot suffice for the LED cur- rent need, the charge pump will switch to 2x mode. Mode Transition The APW7000 operates in 1x, 1.5x and 2x charge pump modes and automatically switches the charge pump modes depend on the input voltage to main tain the re- quired power for high power efficiency. If the APW7000 operates in 1x mode, the VOUT is pulled up to VIN. When VIN decreases, the VILED will decease to maintain the regulated LED current. Until VILED is below 100mV, the device will switch to 1.5x mode. In 1.5x mode, the VILED is regulated to 0.18V, and the output voltage is VF+0.18V. If VIN continues to decrease until VILED is below 100mV again, the device will switch to 2x mode. When the VIN rises and reaches by approximately VOUT-300mV, the APW7000 switches back to 1.5x mode. If the VIN contin- ues to rise and reaches by approximately VOUT+300mV, the APW7000 switches back to 1x mode. The 2x charge pump is enough to suffice the White LED for a Li-ion battery application. The APW7000 ensures that in the 1x mode for as long as possible to increase the efficiency and extend the operating range by using the 2x mode. The transition voltages from 1x to 1.5x and 1.5x to 2x are given by: VTRANS1X = VF + 0.1V + (IOUT x ROUT1X) VTRANS1.5X = [VF + 0.1V + (IOUT x ROUT1.5X)] / 1.5 where VF is the forward voltage of LED IOUT is the output current ROUT1X is the output impedance in 1x mode = 1.6Ω ROUT1.5X is the output impedance in 1.5x mode = 7Ω Control Logic Pins The APW7000 provides three logic input pins to enable or disable a combination of LEDs. Table1 shows the truth table of the logic pins. If the LED channels are not used, connecting the ILED pins to VOUT to turn off the respec- tive LED channels. Control Logic Pin LED Status CTRL2 CTRL1 CTRL0 LED4 LED3 LED2 LED1 0 0 0 OFF OFF OFF ON 0 0 1 OFF OFF ON OFF 0 1 0 OFF ON OFF OFF 0 1 1 ON OFF OFF OFF 1 0 0 OFF OFF ON ON 1 0 1 OFF ON ON ON 1 1 0 ON ON ON ON 1 1 1 OFF OFF OFF OFF Table1. The Truth Table of Control Logic Pins LED Current Setting Connect a resistor from ISET pin to GND to set the LED current. The ISET voltage is typically 1.2V, and the LED current is typically 400 times the current through the ISET resistor. The LED current is given by: LED SET I V2.1400R ×= The APW7000 provides up to 30mA of LED current per LED and the device has a max current matching of ±5% between any two LED currents and a max current accu- racy of ±8%. If high accuracy is required, using a 1% pre- cision surface mount resistor for the need. ILED (mA) RSET (kW) 5 92 10 47 15 32 20 24 30 16.5 Table2. RSET Value Selection

Copyright  ANPEC Electronics Corp. Figure 1. RSET Value vs. LED Current

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw14

Package Information

D E A b Pin 1 Corner E2KL e SYMBOL MIN. MAX. 1.00 0.00 0.25 0.35 2.10 2.50 0.05 2.10 A b D E e L MILLIMETERS A3 0.20 REF QFN4x4-16 0.30 0.50 2.50

0.008 REF

MIN. MAX. INCHES 0.039 0.000 0.010 0.014 0.083 0.098 0.083 0.012 0.020 0.80 0.098 0.031 0.002 0.65 BSC 0.026 BSC 3.90 4.10 0.154 0.161 3.90 4.10 0.154 0.161 0.20 0.008K

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw15 Application A H T1 C d D W E1 F -0.00 13.0+0.50 -0.20 P0 P1 P2 D0 D1 T A0 B0 K0 QFN4x4-16 (mm) Carrier Tape & Reel Dimensions H A d A AB W F T P0OD0 B SECTION B-B SECTION A-A OD1 Package Type Unit Quantity QFN4x4-16 Tape & Reel 3000 Devices Per Unit

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw16 Taping Direction Information QFN4x4-16 Classification Profile USER DIRECTION OF FEED

Copyright  ANPEC Electronics Corp. (Tsmax to TP) 3 °C/second max. 3°C/second max. Average ramp-down rate (Tp to Tsmax) 6 °C/second max. 6 °C/second max. Time 25°C to peak temperature 6 minutes max. 8 minutes max.

• Tolerance for peak profile Temperature (Tp) is defined as a supplier minimum and a user maximum.

** Tolerance for time at peak profile temperature (tp) is defined as a supplier minimum and a user maximum. Table 2. Pb-free Process – Classification Temperatures (Tc) Table 1. SnPb Eutectic Process – Classification Temperatures (Tc)

Copyright  ANPEC Electronics Corp. Rev. A.2 - Feb., 2009 APW7000 www.anpec.com.tw18 Customer Service 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 : 2F, No. 11, Lane 218, Sec 2 Jhongsing Rd., Sindian City, Taipei County 23146, Taiwan Tel : 886-2-2910-3838 Fax : 886-2-2917-3838