www.fairchildsemi.com FAN5611/FAN5612/FAN5613/FAN5614 Low-Dropout LED Drivers for White, Blue or any Color LED Features General Description • LED Drivers for parallel-connected LEDs • Ultra-low voltage drop (< 300mV) to support direct Li-ion applications • No EMI, no switching noise • No external components needed for current matching • Both analog and PWM brightness control • FAN5611, FAN5613 feature up to 160mA bias current (up to 40mA for each LED) • FAN5612 features up to 120mA bias current (up to 40mA for each LED) • FAN5614 features up to 160mA bias current (up to 80mA for each LED) • Enable/Shutdown control (FAN5612, FAN5613, FAN5614) • Shutdown current < 1µA • Small footprint SC-70 and 2x2 MLP The FAN5611/FAN5612/FAN5613/FAN5614 driver family provides matched current source bias for white, blue or any color LEDs. The current in the LEDs can be programmed by an external resistor. The individual LED currents are 200 x ISET, where ISET is the current through the external resistor connected to the CTRL pin. The FAN5611 and the FAN5613 are capable of driving four LEDs, while the FAN5612 can drive three LEDs. The FAN5614 is designated to drive two high current LEDs. In any case, at least I1 should be always connected to an LED in order to have the other LEDs driven with a matched current to I1. The FAN5612, FAN5613 and FAN5614 have Enable pin. When these devices are disabled, the supply current drops to less than 1µA. The FAN5611, FAN5612 and FAN5614 drivers are available in a 6-lead SC-70 package. The FAN5613 is available in an 8-lead MLP package. Applications • • • • • • Cell Phones PDA, DSC, MP3 Players Handheld Computers LCD Display Modules Keyboard Backlight LED Displays Typical Applications ISET VCONTROL (3V) I4 I3 I2 I1 ISET VCONTROL (3V) CTRL RSET VIN VIN VIN FAN5611 GND I3 CTRL RSET ENABLE Four Diode Control I2 I1 FAN5612 ISET VCONTROL (3V) ENABLE ON/OFF I4 CTRL RSET I3 I2 I1 FAN5613 ON/OFF GND GND Three Diode Control with ON/OFF Four Diode Control With ON/OFF VIN I1/I2 ISET VCONTROL (3V) CTRL RSET ENABLE I3/I4 FAN5614 ON/OFF GND Two Diode Control with ON/OFF REV. 1.0.4 6/4/04 FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION Pin Assignments CTRL 1 CTRL I3 6 1 6 ON/OFF I2 2 5 I4 I2 2 5 I3 I1 3 4 GND I1 3 4 GND CTRL 1 6 ON/OFF I1/I2 2 5 I3/I4 N/C 3 4 GND FAN5612 FAN5611 FAN5614 6-LEAD SC-70 PACKAGE TOP VIEW ON/OFF NC I3 CTRL I4 I2 GND I1 FAN5613 2x2mm 8-LEAD MLP PACKAGE Pin Description (6-Lead SC-70 and 8-Lead MLP) Pin Name Pin No. FAN5611 FAN5612 1 CTRL CTRL FAN5613 FAN5614 CTRL ON/OFF 2 I2 Description Sets LED Current Chip ON/OFF/Disable I2 Connect to Cathode of LED I3 Connect to Cathode of LED I1/I2 3 I1 I1 Connect to Cathode of LED I4 4 GND 5 I4 GND GND Connect to Cathode of LED N/C No Connection GND Ground Connect to Cathode of LED I3 Connect to Cathode of LED I1 Connect to Cathode of LED I3/I4 6 I3 Connect to Cathode of LED ON/OFF ON/OFF I2 2 Connect to Cathode of LED 7 CTRL 8 NC Chip ON/OFF/Disable Connect to Cathode of LED Sets LED Current No Connection REV. 1.0.4 6/4/04 PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614 Absolute Maximum Ratings (Note1) Parameter Min Max Unit V VI1, VI2, VI3, VI4 and ENABLE Voltage to GND -0.3 6 CTRL Voltage to GND -0.3 3 Power Dissipated by package at TA = 85°C 6 Lead-SC70 190 8 Lead-MLP2X2 700 I1, I2, I3, I4 Steady State Current FAN5611/12/13 40 I1/I2, I3/I4 Steady State Current FAN5614 mW mA 80 Lead Temperature (Soldering 10 seconds) 300 °C Junction Temperature 150 °C 150 °C Storage Temperature -55 Electrostatic Discharge Protection (ESD) Level (Note2) HBM 4 CDM 1 kV Recommended Operating Conditions Parameter LED Cathode Voltage Ambient Temperature Min Typ Max Unit FAN5611, FAN5612, FAN5613 0.3 0.5 1 V FAN5614 0.15 25 85 °C -40 Notes: 1. Functional operation under these conditions is NOT implied. Performance and reliability are guaranteed only if Operating Conditions are not exceeded. 2. Using Mil Std. 883E, method 3015.7(Human Body Model) and EIA/JESD22C101-A (Charge Device Model) REV. 1.0.4 6/4/04 3 FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION DC Electrical Characteristics (VIN = 3.3V to 5.5V, ENABLE = VIN, TA = 25°C Unless otherwise noted) Parameter Output Current Multiplication Ratio Conditions Min. Typ. Max. FAN5611/12/13 ISET = 100µA VSAT = 300mV 140 200 260 FAN5614 ISET = 100µA VSAT = 150mV LED Current (Per Diode) FAN5611/12/13 LED to LED Current Matching VSAT = 300mV ISET = 100µA FAN5614 VSAT = 150mV ISET = 100µA FAN5611/12/13 VSAT = 300mV ISET = 100µA TA = -40°C to 85°C FAN5614 VSAT = 150mV ISET = 100µA TA = -40°C to 85°C Units 20 -3 mA 3 % Peak Efficiency VIN = 3V Current in OFF Mode (ISET and II) VEN = 0V 1 µA ISET = 150µA 3 V Min. ENABLE “ON Voltage” (Note3) (FAN5612, FAN5613, FAN5614) Max. ENABLE “OFF Voltage” (Note3) (FAN5612, FAN5613 FAN5614) 90 % 0.5 V Notes: 3. ENABLE “ON” is VEN for which II1>20mA @ VI1=0.3V, while ENABLE “OFF” is VEN for which II1<1µA @ VI1>0.3V 4 REV. 1.0.4 6/4/04 PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614 Typical Performance Characteristics FAN5611_12_13 Output Current vs. Temperature ISET vs. VCTRL 24 200 Cathode Voltage = 0.3V 150 20 18 ISET (µA) Output Current (mA) 22 For ISET = 0.1mA 100 16 50 14 For ISET = 0.05mA 12 -40 -20 0 20 40 60 80 0 0.0 100 0.8 1.0 1.2 1.4 1.6 1.8 FAN5614 LED Current vs. LED Cathode Voltage 35 30 LED Current (mA) For ISET = 100µA 20 15 For ISET = 50µA 10 0 0.0 0.2 For ISET = 50µA 25 20 15 For ISET = 25µA 10 0.4 0.6 LED Cathode Voltage (V) 0.8 5 0.0 1.0 0.2 0.4 0.6 LED Cathode Voltage (V) 0.8 1.0 FAN5614 LED Current vs. Set Resistor FAN5611_12_13 LED Current vs. Set Resistor 22 22 Cathode Voltage = 0.3V VCONTROL = 3V LED Current (mA) 18 16 Cathode Voltage = 0.5V 14 Cathode Voltage = 0.6V 12 Cat 10 8 16 14 Cath ode 6 ltag e= 0.3V 0.15 V age = 0. 10V 10 8 Cathode 6 Cathode Voltage = 0.4V e Vo Volt 12 5V 0V hod 18 0.2 0.2 20 20 LED Current (mA) 0.6 FAN5611_12_13 LED Current vs. LED Cathode Voltage 25 4 0.4 VCTRL (V) 30 LED Current (mA) 0.2 Ambient Temperature (°C) 4 Voltage = 0.05V VCONTROL = 3V 2 0 20 REV. 1.0.4 6/4/04 40 60 80 100 Set Resistor (KΩ) 120 140 160 20 40 60 Set Resistor (KΩ) 80 100 5 FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION Typical Performance Characteristics (cont.) LED Current (20mA/div) CTRL Voltage (2V/div) Time (1µs/div) 6 FAN5612_13_14 Enable Voltage Transient Response Enable Voltage (2V/div) LED Current (10mA/div) FAN5611_12_13_14 Control Voltage Transient Response Time (1µs/div) REV. 1.0.4 6/4/04 PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614 Application Information Application Notes Setting the LED Current The ultra-low voltage drop across the FAN561X series of LED drivers, allow the devices to drive white, blue, and other color LEDs in a wide range of input voltages. The driver can be used in many applications. Although, only the FAN5613 is shown in all three examples, any of the FAN561X series of LED drivers can be used in the applications presented in this document, due to their similar operation. The current flowing into LEDs is approximately 200 times greater then the current ISET. The LED current is controlled by VCONTROL and RSET according to the formula: I LED = 200 × ( V CONTROL – V CTRL ) ⁄ R SET For VCONTROL = 3V and a specified LED current, the RSET value can be evaluated using the diagram shown in the Typical Performance Characteristics section. For any other option, ISET value can be determined using the graph ISET vs. VCTRL. The LED’s brightness can also be adjusted by driving ENABLE or the CTRL pin with a PWM signal. The driving signal frequency should be greater than 100Hz to avoid flickering, increasing to more than 1MHz, if necessary. LEDs are very sensitive to temperature. In most cases the maximum allowed junction temperature is 100°C. This temperature is the result of adding to the ambient temperature the over temperature due to power dissipation, is described by as follows: Example 1: Drive low VF white or blue LEDs directly from single cell Li-ion When using white or blue low VF LEDs, and utilizing the drivers low voltage drop, only 3.4V in VIN is needed for the full 20mA LED current. At 3.1V, there is still 5mA typical current available for the LEDs. The single cell Li-ion is utilized in most applications like cell phones or digital still cameras. In most cases, the Li-ion battery voltage level only goes down to 3.0V voltage level, and not down to the full discharge level (2.7V) before requesting the charger. VIN T j = T A + Θ jA × I × V F where Tj is the LED junction temperature, TA is the ambient temperature, ΘjA is the junction to ambient thermal resistance, I is the LED current and VF is the LED forward voltage. VCONTROL ISET I4 CTRL I2 I1 FAN5613 RSET ENABLE I3 ON/OFF GND The FAN5611 to FAN5614 are designed to reduce the current through LEDs, when the temperature rises and the cathode voltage increases, as can be seen from typical the "LED Current vs. LED Cathode Voltage" graph under the Typical Performance Characteristics section. Efficiency Considerations The FAN561X driver’s low dropout architecture can significantly improve the efficiency compared to using simple ballast resistors. The system efficiency, defined as the ratio between the LEDs power and the input supplied power can be calculated as follows: Efficiency = ( V IN – V CATHODE ) ⁄ V IN The lower the VCATHODE, the higher the system efficiency. Efficiency can be further improved using a higher VIN with more LEDs as shown in example 3. – – – – VDROP < 0.3V VF (at 20mA) < 3.1V (Low VF) VIN (at 20mA) =VDROP + VF = 3.4V VIN (at 5mA Typical) ~ 3.1V Where VIN = Single cell Li-ion Voltage Key advantages: • No boost circuit needed for the LCD or keyboard backlight • Drivers directly connected to a Li-ion battery • No EMI, no switching noise, no boost efficiency lost, no capacitor, and no inductor. Example 2: Drive high VF white or blue LEDs from existing bus from 4.0V to 5.5V High VF white or blue LEDs have forward voltage drop in the range of 3.2V to 4.0V. To drive these LEDs with the maximum current of 20mA for maximum brightness, usually requires a boost circuit for a single cell Li-ion voltage range. REV. 1.0.4 6/4/04 7 FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION In some cases, there is already a voltage bus in the system, which can be utilized. Due to the ultra-low voltage drop of the FAN561X series of LED drivers to drive high VF white or blue LEDs. The VIN needs to be only 300mV higher than the highest VF in the circuit. VIN VCONTROL ISET I4 CTRL I3 I2 I1 Key advantage: • No need for current matching resistors and discrete transistor for brightness control LED Brightness Control All of the FAN561X LED Drivers feature analog and PWM controls to give designers flexible brightness control. These control methods can be applied to the circuit in two different ways, to provide more flexibility than any other solution. To determine the value of RSET, use the “ISET vs. VCTRL” graph under the Typical Performance Characteristics section. FAN5613 RSET 1. FAN5611 ON/OFF ENABLE GND – – – – VIN VDROP < 0.3V VF (at 20mA) < 3.3V to 4.0V (High VF) VIN (at 20mA) =VDROP + VF = 3.6V to 4.3V VIN (at 5mA Typical) ~ 3.3V ISET VCONTROL (3V) I4 CTRL RSET I3 I2 I1 FAN5611 GND Where VIN = Existing bus = 3.3V to 4.3V Key advantages: • No boost circuit needed for LCD or keyboard backlight • Driver utilizes the existing bus • Ultra-low voltage drop provides the full 20mA LED current at the lowest possible voltage level. Example 3: Drive white, blue, red, amber LEDs string Assuming boost circuit, or existing voltage bus, the FAN561X series of LED drivers can be used to drive a whole string of LEDs and flexible brightness control - analog and/or PWM. - Analog Set VCONTROL and RSET for LED current 200 × ( V CONTROL – V CTRL ) I LED = ------------------------------------------------------------------------R SET - PWM VCONTROL = PWM – Amplitude sets maximum LED current – Pulse width controls between 0 and maximum 2. FAN5612 VIN VIN 'N' number of LEDs Per Branch ISET VCONTROL ISET VCONTROL RSET ENABLE I4 I3 I2 I1 I3 CTRL I2 I1 FAN5612 RSET CTRL FAN5613 ENABLE ON/OFF GND ON/OFF GND – VDROP < 0.3V – VIN_MIN = N × VF + VDROP – VIN _MAX = N × VF + 5.5V Where VIN = Existing bus, boost voltage - Analog Set VCONTROL and RSET for LED current - PWM - 1 200 × ( V CONTROL – V CTRL ) I LED = ------------------------------------------------------------------------R SET VCONTROL = PWM 8 REV. 1.0.4 6/4/04 PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614 – Amplitude sets maximum LED current – Pulse width controls between 0 and maximum - Analog Set VCONTROL and RSET for LED current - PWM - 2 Set VCONTROL and RSET for maximum LED current 200 × ( V CONTROL – V CTRL ) I LED = ------------------------------------------------------------------------R SET I LED ∼ 200 × I SET - PWM - 1 VCONTROL = PWM ON/OFF = PWM – Amplitude has no effect on current – Pulse width controls between 0 and maximum - PWM - 2 Set VCONTROL and RSET for maximum LED current 3. FAN5613 VIN VCONTROL – Amplitude sets maximum LED current – Pulse width controls between 0 and maximum I LED ∼ 200 × I SET ISET I4 CTRL RSET ENABLE I3 I2 I1 200 × ( V CONTROL – V CTRL ) I LED = ------------------------------------------------------------------------R SET ON/OFF = PWM FAN5613 ON/OFF – Amplitude has no effect on current – Pulse width controls between 0 and maximum VSS - Analog Set VCONTROL and RSET for LED current 200 × ( V CONTROL – V CTRL ) I LED = ------------------------------------------------------------------------R SET - PWM - 1 VCONTROL = PWM – Amplitude sets maximum LED current – Pulse width controls between 0 and maximum - PWM - 2 Set VCONTROL and RSET for maximum LED current I LED ∼ 200 × I SET ON/OFF = PWM – Amplitude has no effect on current – Pulse width controls between 0 and maximum 4. FAN5614 VIN I1/I2 ISET VCONTROL CTRL I3/I4 FAN5614 RSET ENABLE REV. 1.0.4 6/4/04 ON/OFF VSS 9 FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION Mechanical Dimensions 2mmx 2mm 8-Lead MLP 2.0 0.15 C A B 2X 8 1.40 5 2.55 2.0 1.00 0.70 (0.78) 0.15 C 1 2X TOP VIEW 0.50 TYP 1.0 MAX 4 0.30 TYP RECOMMENDED LAND PATTERN 0.10 C (0.20) 0.08 C 0.05 0.00 C SEATING PLANE SIDE VIEW 1.25 1.20 PIN #1 IDENT 1 4 0.45 0.20 0.65 0.60 8 5 0.50 1.50 0.18~0.30 0.10 M C A B 0.10 M C BOTTOM VIEW NOTES: A. CONFORMS TO JEDEC REGISTRATION MO-229, VARIATION VCCD-3, DATED 11/2001 B. DIMENSIONS ARE IN MILLIMETERS. C. DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994 10 REV. 1.0.4 6/4/04 PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614 Mechanical Dimensions 6-Lead SC-70 Package SYMM CL 0.65 2.00 ± 0.20 0.50 MIN 6 4 B 1.25 ± 0.10 1 1.90 3 0.30 0.15 (0.25) 0.40 MIN 1.30 0.10 M A B 0.65 LAND PATTERN RECOMMENDATION 1.30 SEE DETAIL A 1.00 0.80 1.10 0.80 C 0.10 0.00 C (0.43) SEATING PLANE GAGE PLANE 2.10 ±0.30 NOTES: UNLESS OTHERWISE SPECIFIED (R0.10) A) 0.25 0.10 0.20 0.45 0.30 B) C) THIS PACKAGE CONFORMS TO EIAJ SC-88A, 1996. ALL DIMENSIONS ARE IN MILLIMETERS. DIMENSIONS DO NOT INCLUDE BURRS OR MOLD FLASH. 30° 0° DETAIL A SCALE: 2X REV. 1.0.4 6/4/04 11 FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION Ordering Information Product Number Package Type Order Code FAN5611 6-Lead SC-70 FAN5611S7X FAN5612 6-Lead SC-70 FAN5612S7X FAN5613 2mm x 2mm 8-Lead MLP FAN5613MPX FAN5614 6-Lead SC-70 FAN5614S7X DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 6/4/04 0.0m 005 Stock#DS30005611 2004 Fairchild Semiconductor Corporation