AMC7110/1/3/4 WHITE/BLUE LED DRIVER FOR LI-ION BATTERY APPLICATION www.addmtek.com DESCRIPTION FEATURES The AMC7110 series is member of ADDM North Star White/Blue LED driver family. No external component is required. Especially good for use Li-ion battery powered LCD display’s backlight white LEDs. The special circuit design provides over 90% efficiency in low noise. LED sink current 20mA and 15mA Individual current sink circuit for all LEDs outputs to prevent short / open circuit on LEDs. PTC LED current for luminosity compensation. 3 channels (SOT-26), 4 channels (MSOP-8) available. Target end applications are color LCD display, such as mobile phone with color display, smart phone, PDA, etc. 90% efficiency Supply voltage range 2.7V ~ 6V 0.1uA standby current 2KV HBM ESD protection Advanced Bi-CMOS process. APPLICATIONS Small Size Color LCD Backlights Mobile Phone, Smart Phone Keypad Backlights OPTIONS PACKAGE PIN OUT LED Sink Current 20mA Channel Number 3 AMC7111 20mA 4 AMC7113 15mA 3 AMC7114 15mA 4 VDD 1 GND 2 EN 3 AMC711x 6 LED1 5 4 LED1 PGND 1 8 LED2 EN 2 7 LED2 LED3 V DD 3 6 LED3 GND 4 5 LED4 AMC7110 / AMC7113 SOT-26 AMC7110 TSOT-26 TYPICAL APPLICATION CIRCUIT EN Enable VDD Li-Ion Battery LED1 711x Device Name AMC7110 CBP VDD AMC7111 / AMC7114 MSOP-8 LED1 GND LED2 EN LED3 LED2 AMC7110 QFN 2mm×2mm LED4 GND LED1 PGND EN LED2 VDD LED3 GND LED4 AMC7111 QFN 2mm×2mm ORDER INFORMATION 18 ~ 22 SOT-26 6-pin AMC7110DBF MSOP-8 8-pin AMC7111DNF QFN 2×2 QFN 2×2 TSOT-26 W W 6-pin 8-pin 6-pin AMC7110DJ AMC7110WF AMC7111WF 19 ~ 21 AMC7110ADBF AMC7111ADNF - - - 13.5 ~ 16.5 AMC7113DBF AMC7114DNF - - - ILED (mA) DB DN DJ Note: Surface-mount packages is available in Tape & Reel. Append “T” to part number (i.e., AMC7111DNFT). The letter “F” is marked for lead free process. Copyright © 2007 ADDtek Corp. 1 DD028_F -- JUNE 2007 AMC7110/1/3/4 ABSOLUTE MAXIMUM RATINGS (Note) -0.3V to 7V -0.3V to 7V -0.3V to 5.5V 150OC -40OC to 150OC 260OC Input Voltage, VDD Output Voltage, VLEDn Voltage at all other pins Maximum Junction Temperature, TJ Storage Temperature Range Lead Temperature (soldering, 10 seconds) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. POWER DISSIPATION TABLE Package DB DJ DN W TA=70 °C TA= 85°C θJA Derating factor ( mW/°C ) TA≦25 °C Power rating (mW) Power rating (mW) Power rating (mW) ( °C/W ) TA≧25 OC 220 220 180 76.5 4.5 4.5 5.56 13.1 568 568 695 1634 363 363 444 1045 295 295 361 849 Note : Junction Temperature Calculation: TJ = TA + (PD x θJA). PD: Power Dissipation, TA: Ambient temperature, θJA: Thermal Resistance-Junction to Ambient The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no ambient airflow. BLOCK DIAGRAM VDD VDDI EN Control Logic AMC7110 Driving Stage Driving Stage Driving Stage Reference Current Copyright © 2007 ADDtek Corp. LED1 LED2 LED3 GND 2 DD028_F -- JUNE 2007 AMC7110/1/3/4 PIN DESCRIPTION Pin Name Pin Function LED1 ~ LED3/4 Output pins; connect to LED’s cathode. EN Enable control pin. Pulling this pin high will enable the device. Pulling this pin to GND will disable the device. VDD Power supply GND Ground PGND Power ground RECOMMENDED OPERATING CONDITIONS Parameter Symbol Min Typ Supply Voltage VDD 2.7 Output Sink current ILED Operating free-air temperature range Ta -40 Max 6 25 +85 Unit V mA ℃ ELECTRICAL CHARACTERISTICS VDD=3.7V, TA=25°C, No Load, Input: VIH=3.3V, VIL=GND. (Unless otherwise noted) Parameter Symbol Condition Min Typ Max Unit 0.4 V “Low” Input Voltage VIL “High” Input Voltage VIH 1.7 “Low” Input Current IIL -5.0 +5.0 µA “High” Input Current IIH -5.0 +5.0 µA LED Dropout Voltage VLEDL LED Sink Current ILED AMC7110/1 Note 75 90 AMC7113/4 Note 60 75 AMC7110A AMC7111A VDD=2.7V~6V VLEDn=0.15~3V VLEDn=0.15~3V 19 20 21 18 20 22 17 20 23 13.5 15 16.5 AMC7110/1 VDD=2.7V~6V VLEDn=0.15~3V AMC7113/4 LED Sink Current Deviation Supply Current Standby Supply Current △ILEDn V ±3 AMC7110A ±5 IDD 400 IDDSTBY 0.1 800 Apply Pin EN mV mA LEDn % uA uA VDD Note: LED Dropout Voltage: 90% × ILEDn @ VLEDn=150mV Copyright © 2007 ADDtek Corp. 3 DD028_F -- JUNE 2007 AMC7110/1/3/4 APPLICATION INFORMATION Enable The EN pin enables and disables the device. Pulling the EN pin high will enable the device beginning sink current on LED pins. Pulling the EN pin to ground will shutdown the device reducing the IDD current to typical 0.1uA. This pin should not be left floating and need to be terminated. LED Brightness Control The LED sink current was fixed at 20mA or 15mA. Apply PWM signal to EN pin and control the duty that could control the LED brightness from 0% to maximum. AMC711x EN PWM Signal VDD LED1 Li-Ion Battery CBP LED2 LED4 GND Supply Voltage and Li-ion battery low warning AMC711X works with supply voltage range from 2.7V to 6V. The white/blue LED forward voltage is in the range of 2.9V to 3.5V at 20mA current. The supply voltage range and LED forward voltage (Vf) should be set to fully ultilize Li-ion battery energy. For example, the maximum white LED forward voltage limit at 3.2V (@ 20mA) when Li-ion battery discharg reaches 3.275V( normally around 1% ~ 3% power left in the battery). When Li-ion battery voltage is lower than the presetted low level, the LED current(brightness) will start to decrease. Efficiency The ACR (Advanced Current Regulator) architecture offers ultra low output dropout that significantly improves the efficiency compared to Inductive Boost type or Capacitor Charge Pump type LED driver. The system efficiency, defined as the ratio between the LEDs power and the input supplied power, is: Efficiency = (Vf1 x ILED1 + Vf2 x ILED2 + Vf3 x ILED3 + Vf4 x ILED4) / (VDD x IDD) Where, Vf is the forward voltage of LED. Copyright © 2007 ADDtek Corp. 4 DD028_F -- JUNE 2007 AMC7110/1/3/4 CHARACTERIZATION CURVES EFFICIENCY vs. SUPPLY VOLTAGE QUIESCENT CURRENT vs. SUPPLY VOLTAGE ( 4 LEDs, Vf=3.2V at 20mA/LED) ( 4 LEDs, Vf=3.2V at 20mA/LED) 100 EFFICIENCY P LED/PSUPPLY (%) QUIESCENT CURRENT (uA) 300 250 200 150 100 50 0 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 95 90 85 80 75 70 65 60 4.2 3.0 3.1 3.2 3.3 Supply Voltage (V) 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 Supply Voltage (V) POWER IN vs. SUPPLY VOLTAGE ILED vs. SUPPLY VOLTAGE (ILED=20mA, Vf=3.2V) 25 3.4 ( 4 LEDs, Vf=3.2V at 20mA/LED) 40 35 30 Supply Power (mW) LED Current(mA) 20 15 10 5 25 20 15 10 5 0 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Supply Voltage (V) 3.9 4.0 4.1 0 4.2 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 Supply Voltage(V) QUIESCENT CURRENT vs TEMPERATURE 400 Quesent Current (uA) 350 AMC7110/1 300 AMC7113/4 250 200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 110 120 Temperature. (°C) Copyright © 2007 ADDtek Corp. 5 DD028_F -- JUNE 2007 AMC7110/1/3/4 ILED vs. Efficiency ILED vs. TEMPERATURE ( VDD=3.7V, LED Vf=3.2V) 20.9 100 20.8 20.7 90 LED Current (mA) Efficiency PLED / PSUPPLY (%) 95 85 80 75 70 65 60 20.6 20.5 20.4 20.3 20.2 20.1 55 20.0 0 50 5 7 9 11 13 15 17 19 21 Copyright © 2007 ADDtek Corp. 10 20 30 40 50 60 70 80 90 100 110 120 Temperature. (°C) LED Current (mA) 6 DD028_F -- JUNE 2007 AMC7110/1/3/4 PACKAGE Surface Mount SOT-26 (DB) D b L E L1 c L2 e1 M A2 A - - 0.057 - - - - 0.006 - - 0.15 0.90 1.15 1.30 1.45 b 0.012 - 0.020 0.30 - 0.50 c 0.003 - 0.009 0.08 - 0.22 D 0.114 BSC 2.90 BSC E 0.110 BSC 2.80 BSC E1 e 0.063`BSC 1.60 BSC 0.037 BSC 0.95 BSC e1 0.075BSC L 0.012 0.018 0.024 1.90 BSC 0.30 0.45 L1 0.024 REF 0.60 REF L2 0.010 BSC 0.25 BSC °M M A1 MILLIMETERS MIN TYP MAX A1 A2 0.035 0.045 0.051 E1 e A INCHES TYP MAX MIN 5° 10° 15° 5° 10° 0.60 15° 8-Pin Plastic MSOP (DN) A J INCHES MIN P MAX MIN TYP MAX A 0.114 0.118 0.122 2.90 3.00 3.10 B 0.114 0.118 0.122 2.90 C 0.040 0.044 D 0.012 F 0.016 0.021 0.031 G F - J M D G TYP MILLIMETERS K M P 0.026 3.00 3.10 1.02 1.12 0.30 - 0.40 0.53 0.80 - 0.65 - 0.006 0.15 0.000 - 0.006 0º - 8º 0.185 0.193 0.201 0.00 - 0.15 0º - 8º 4.70 4.90 5.10 C K Copyright © 2007 ADDtek Corp. 7 DD028_F -- JUNE 2007 AMC7110/1/3/4 6-Pin QFN 2mm×2mm D E A A3 b SYMBOLS MIN. TYP. MAX. A A1 A3 b D D1 E E1 e L 0.800 0.000 0.200 1.950 1.350 1.950 0.750 0.850 0.203 0.250 2.000 1.400 2.000 0.800 0.650 0.350 0.900 0.050 0.300 2.050 1.450 2.050 0.850 0.300 0.400 UNIT: MILLIMETERS D1 e E1 L A1 8-Pin QFN 2mm×2mm D E A A3 b SYMBOLS MIN. TYP. MAX. A A1 A3 b D D1 E E1 e L 0.800 0.000 0.200 1.950 1.150 1.950 0.550 0.300 0.850 0.203 0.250 2.000 1.200 2.000 0.600 0.500 0.350 0.900 0.050 0.300 2.050 1.250 2.050 0.650 0.400 UNIT: MILLIMETERS D1 e E1 L Copyright © 2007 ADDtek Corp. A1 8 DD028_F -- JUNE 2007 AMC7110/1/3/4 Surface Mount TSOT-26 C D b SYMBOLS L E E1 e θ e1 4xθ1 A A2 A1 Copyright © 2007 ADDtek Corp. 4xθ1 9 L1 MILLIMETERS MIN TYP MAX A --- --- 1.00 A1 0.00 0.05 0.10 A2 0.84 0.87 0.90 b 0.35 0.40 0.50 C 0.10 0.125 0.15 D 2.70 2.90 3.10 E 2.60 2.80 3.00 E1 1.40 1.60 1.80 e --- 0.95 --- e1 --- 1.90 --- L 0.30 0.40 0.60 L1 0.5 0.6 0.7 θ 0° 4° 8° θ1 4° 10° 12° DD028_F -- JUNE 2007 AMC7110/1/3/4 IMPORTANT NOTICE ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer’s applications, the customer should provide adequate design and operating safeguards. ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of its products to the specifications applicable at the time of sale. ADDtek Corp. 9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105 TEL: 2-25700299 FAX: 2-25700196 Copyright © 2007 ADDtek Corp. 10 DD028_F -- JUNE 2007