FAN5622 / FAN5624 / FAN5626 Linear LED Drivers with Single-Wire Digital Interface Features Description Family of Three Linear Current-Sink LED Drivers that Support 2, 4, or 6 LED Outputs Current Sink Driver for Each LED Output: – 30mA Maximum Output Current – 50mV Drop-out at 15mA IOUT – Better than 3% Matching between Channels – External RSET Single-Wire Digital Control Interface for Easy Programming – 32 Linear Steps of Dimming Control The FAN5622, FAN5624, and FAN5626 are two-, four-, and six-channel current-sink linear LED drivers used to backlight the main LCD displays or keypads in mobile electronics, such as cellular phone handsets. Less than 1µA Shut-Down Current Short-Circuit, Under-Voltage, and Thermal Protection Wide Input Voltage Range: 2.7 to 5.5V Small Form-Factor Packages: – FAN5622: 6-Pin Super SOT23 – FAN5624: 10-Lead 1.4x1.8x0.55mm UMLP – FAN5626: 10-Lead 1.6x2.1x0.55mm MicroPak™ MLP A very low dropout of 50mV allows driving LEDs without any inductors or switch capacitors. The brightness levels of the LED outputs are programmed through single-wire digital control interface. The user can program 32 linear dimming steps and turn on and off the LEDs through this interface by applying digital pulses. The FAN562x family of linear LED drivers provides high efficiency due to the low drop-out voltage of the LED driver. Good matching between different channels of LED output is provided across the entire 32 dimming steps. These LED drivers also integrate short circuit, under-voltage, and thermal protection to ensure for a more robust solution. The FAN5622, FAN5624, and FAN5626 are available in very small form-factor packages: 6-pin Super SOT23, 10-lead UMLP, and 10-lead MicroPak™ MLP, respectively. Applications Mobile Handsets Mobile Internet Devices PMP and MP3 Players LCD Modules Figure 1. Typical Application of FAN5622 Ordering Information Part Number # of Channels Temperature Range FAN5622SX 2 -40 to 85°C 6-Lead, SUPERSOT6, JEDEC MO-193, 1.6mm Wide Tape and Reel FAN5624UMPX 4 -40 to 85°C 10-Lead, Ultrathin Molded Leadless Package (UMLP) Tape and Reel FAN5626LX 6 -40 to 85°C 10-Lead ,Micropak ,JEDEC MO255, 1.6 X 2.1mm Tape and Reel © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 Package Packing www.fairchildsemi.com FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface January 2012 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Applications Diagrams Figure 2. FAN5624 Typical Application for 4 LEDs Figure 3. FAN5626 Typical Application for 6 LEDs Block Diagram Figure 4. Block Diagram © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 2 CTRL 1 6 LED1 GND 2 5 ISET VIN 3 4 LED2 Figure 6. FAN5624: 10-Lead UMLP, Top View Figure 5. FAN5622: 6-Pin SSOT23, Top View LED6 9 ISET LED5 LED4 LED3 8 7 6 10 LED2 5 1 2 3 4 VIN GND CTRL LED1 Figure 7. FAN5626: 10-Lead MicroPak™ MLP, Top View Pin Definitions Pin # FAN5626 FAN5622 FAN5624 MicroPak SSOT23-6 UMLP10 MLP10 Name Description 3 5 1 VIN Input Voltage. Connect to 2.7-5.5VDC input power source. 2 6 2 GND Ground 5 3 10 ISET LED Current Setting. Full-scale LED current is set by tying this pin through a resistor (RSET) to GND. 1 7 3 CTRL Control pin. Program dimming levels by driving pin with digital pulses. This pin cannot be left floating. 6 8 4 LED1 LED Cathode #1. LED current sink output. 4 10 5 LED2 LED Cathode #2. LED current sink output. 1 6 LED3 LED Cathode #3. LED current sink output. 2 7 LED4 LED Cathode #4. LED current sink output. 8 LED5 LED Cathode #5. LED current sink output. 9 LED6 LED Cathode #6. LED current sink output. 4, 9 © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 N/C No Connect www.fairchildsemi.com 3 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Pin Configuration Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VCC ESD Parameter Min. Max. Unit VIN Pin -0.3 6.0 V Other Pins(1) -0.3 VIN + 0.3 V Electrostatic Discharge Protection Level Human Body Model per JESD22-A114 3.0 kV Charged Device Model per JESD22-C101 1.5 kV TJ Junction Temperature –40 TSTG Storage Temperature –65 TL Lead Soldering Temperature, 10 Seconds +150 °C +150 °C +260 °C Note: 1. Lesser of 6.0V or VIN+0.3V. Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings. Symbol Parameter Min. Max. Unit VIN Power Supply Voltage Range 2.7 5.5 V TA Operating Ambient Temperature Range -40 +85 °C Operating Junction Temperature Range -40 +125 °C 5 30 mA TJ ILED(FS) Full-Scale LED Current Thermal Properties Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with boards in accordance to JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature TJ(max) at a given ambient temperature TA. Symbol JA Parameter Typical Unit Junction-to-Ambient Thermal Resistance, SSOT23-6 Package 235 °C/W Junction-to-Ambient Thermal Resistance, UMLP10 Package(2) 287 °C/W 220 °C/W (3) Junction-to-Ambient Thermal Resistance, MicroPak™ MLP10 package Notes: 2. Recommended not to exceed 132mW of maximum power dissipation. 3. Recommended not to exceed 198mW of maximum power dissipation. © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 4 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Absolute Maximum Ratings VIN = 2.7V to 5.5V, RSET = 19.10kΩ, TA = -40°C to +85°C, Vf = 2.5V to [3.5V or VIN – 0.1V], whichever is smaller. Typical values are at TA = 25°C, VIN = 3.6V, and Vf = 3.2V. Symbol Parameter Condition Min. Typ. Max. Unit VIN = 3.6V, CTRL = 0 0.3 1.0 µA FAN5622: VIN = 3.6V, ILED = 0mA 0.4 0.8 mA FAN5624: VIN = 3.6V, ILED = 0mA 0.6 1.0 mA FAN5626: VIN = 3.6V, ILED = 0mA 0.8 1.2 mA 1 250 nA Power Supplies ISD Shutdown Supply Current IIN Operating Supply Current IIH Control Pin Input Current CTRL = 1.8V Under-Voltage Lockout Threshold VIN Rising Full-Scale LED Output Current ILEDx = 30mA; x = 1 to 6 Absolute Current Accuracy VIN=2.85V – 4.5V; VCATH =0.15 to (1.2V or VIN=2.55V, Whichever is Smaller); Full-Scale Current 530mA, TA = 25°C LED Current Matching(4) ILEDx = 15mA; V_LEDx=0.4V, TA = 25°C VISET ISET Drive Voltage 9.53kΩ ≤ RSET ≤ 56.2kΩ 1.20 IRATIO Current Mirror Ratio from ISET Pin 9.53kΩ ≤ RSET ≤ 56.2kΩ 240 ∆IOUT_LOAD IOUT Load Regulation VIN = 3.6V, ILEDx = 15mA, LED VF = 2.7 to 3.5V, -3 +3 % ∆IOUT_LINE IOUT Line Regulation VIN = 2.7 to 4.8V, ILEDx = 15mA, VCATH = 0.5V -4 +4 % VUVLO VIN Falling 2.50 2.70 V 2.30 2.50 V 5 30 mA -10 +10 % -3 +3 % 2.10 Regulation IFS_LEDx (MAX) ILED ILED MATCH VDROPOUT TSD Dropout Voltage Thermal Shutdown VIN=3.6V; ILED = 15mA, -10% ILED Drop 50 VIN=3.6V; ILED = 30mA, -10% ILED Drop 60 Rising Temperature at Junction 150 Hysteresis 20 V mV °C Logic Input (CTRL) VIH HIGH-Level Input Voltage 1.2 VIL LOW-Level Input Voltage TLO CTRL LOW Time for Dimming VIN = 3.6V; See Figure 17 0.5 THI Time Delay between Steps VIN = 3.6V; See Figure 17 0.5 TON CTRL HIGH to Turn-On Delay VIN = 3.6V; See Figure 17 TSD CTRL LOW, Shutdown Pulse Width VIN = 3.6V; from Falling Edge of CTRL V V µs µs 250 1 0.4 300 µs ms Note: 4. For the two, four, and six LED current sinks of FAN5622, FAN5624, and FAN5626 respectively; the following are determined: the maximum sink current of the two, four, and six LED outputs (MAX); the minimum sink current of the two, four, and six outputs (MIN); and the average sink current (AVG). For all of the LED outputs, two matching numbers are calculated: (MAX-AVG)/ AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is considered the matching figure for the part. The matching figure for a given part is considered to be the highest matching figure of all LED outputs. The typical specification provided is the most likely norm of the matching figure for all parts. © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 5 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Electrical Specifications Figure 8. Efficiency vs. Input Voltage where LED VF=3.2V Figure 9. Dropout Voltage vs. Input Voltage Figure 10. Current Match of Channels vs. Input Voltage Figure 11. Load Regulation at 15mA/Output Figure 12. Shutdown Current vs. Input Voltage Figure 13. Quiescent Current vs. Input Voltage © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 6 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Typical Performance Characteristics Figure 14. Startup Waveform for FAN5626 Figure 15. Shutdown Waveform for FAN5626 Figure 16. Dimming Operation © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 7 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Typical Performance Characteristics The FAN5622, FAN5624, and FAN5626 are a family of current-sink linear LED driver ICs able to drive two, four, and six LEDs respectively. These three devices are powered directly from 2.7V to 5.5V supply and all the channels are controlled via the integrated current sinks from the external power source. Designed with a very low drop-out voltage, the FAN562x products can operate close to the input supply voltage without the need for additional inductive boost or capacitive switching circuitry. Table 2 outlines the dimming levels while Figure 17 shows how to change the dimming levels. Table 2. Brightness Control Levels (RSET = 19.10kΩ) All three devices require only two additional discrete passive components: a single 1µF input ceramic capacitor and a resistor (RSET) to set the maximum current for the LEDs. Each current-sink output provides constant current and can drive the LEDs up to 30mA. Fairchild Semiconductor’s TinyWire™ single-wire digital interface enables these LED drivers to program the brightness level of the LEDs in 32 linear steps. Dimming Level Current Level ILED (mA) 1 1.67% 0.25 2 3.33% 0.50 3 5.00% 0.75 4 6.67% 1.00 5 10.00% 1.50 6 13.33% 2.00 7 16.67% 2.50 8 20.00% 3.00 9 23.33% 3.50 10 26.67% 4.00 11 30.00% 4.50 12 33.33% 5.00 13 36.67% 5.50 14 40.00% 6.00 15 43.33% 6.50 16 46.67% 7.00 17 50.00% 7.50 18 53.33% 8.00 19 56.67% 8.50 20 60.00% 9.00 21 63.33% 9.50 22 66.67% 10.00 23 70.00% 10.50 24 73.33% 11.00 Digital Interface & Dimming Control 25 76.67% 11.50 The FAN5622, FAN5624, and FAN5626 implement a simple single-wire digital interface to program the LED brightness to one of thirty two (32) levels spaced in linear steps. To maintain the brightness of the LEDs at a specific dimming level, the digital pulse signal to the CTRL pin should be held HIGH for that last pulse. It is held HIGH for as long as desired to keep the LEDs illuminated at that specific brightness level. 26 80.00% 12.00 27 83.33% 12.50 28 86.67% 13.00 29 90.00% 13.50 30 93.33% 14.00 31 96.67% 14.50 32 100.00% 15.00 Setting Maximum Current The maximum LED current of the FAN5622, FAN5624, and FAN5626 is programmed by an external resistor called RSET. The maximum full-scale LED current for all three LED drivers is 30mA and it can go as low as 5mA. The FAN562x products also operate below 5mA full-scale LED current by using a larger RSET value. However, the LED channel accuracy and matching specifications are guaranteed. Table 1 shows the RSET resistor values for several full-scale current levels. Table 1. Maximum LED Current Settings by Resistor ILED (mA) RSET (kΩ) 5 56.20 10 28.70 15 19.10 20 14.30 25 11.50 30 9.53 © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 8 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Circuit Description FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Digital Dimming Control Figure 17. Digital Pulse Dimming Control Diagram © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 9 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Physical Dimensions Figure 18. 6-Lead SSOT23 Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 10 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Physical Dimensions (Continued) 1.40 0.15 C A 1.70 B 2X (9X) 0.563 0.663 1 2.10 1.80 PIN#1 IDENT 0.40 0.15 C TOP VIEW 0.55 MAX. 0.10 C (10X) 0.225 2X RECOMMENDED LAND PATTERN 0.152 1.45 0.08 C 0.55 SEATING C PLANE 0.05 SIDE VIEW 9X 0.45 0.40 1.85 0.35 (9X) 0.45 3 (10X) 0.225 6 DETAIL A OPTIONAL MINIMIAL TOE LAND PATTERN 0.40 1 NOTES: PIN#1 IDENT A. PACKAGE DOES NOT FULLY CONFORM TO JEDEC STANDARD. B. DIMENSIONS ARE IN MILLIMETERS. C. DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. D. LAND PATTERN RECOMMENDATION IS BASED ON FSC DESIGN ONLY. E. DRAWING FILENAME: MKT-UMLP10Arev3. 0.15 (10X) 0.25 10 BOTTOM VIEW 0.55 0.45 0.10 C A B 0.05 C 0.10 0.10 0.10 DETAIL A SCALE : 2X PACKAGE EDGE LEAD OPTION 1 SCALE : 2X LEAD OPTION 2 SCALE : 2X Figure 19. 10-Lead, Ultrathin Molded Leadless Package (UMLP) Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 11 0.10 C 2.10 2X A 1.62 B KEEPOUT ZONE, NO TRACES OR VIAS ALLOWED (0.11) 1.12 1.60 PIN1 IDENT IS 2X LONGER THAN OTHER LINES 0.56 0.10 C (0.35) 10X 2X TOP VIEW (0.25) 10X 0.50 RECOMMENDED LAND PATTERN 0.55 MAX 0.05 C 0.05 C 0.05 0.00 C (0.20) 0.35 0.25 SIDE VIEW D 0.65 0.55 DETAIL A 0.35 0.25 1 4 0.35 0.25 DETAIL A 2X SCALE 0.56 5 10 (0.29) (0.15) (0.36) 6 9 0.50 0.25 9X 0.15 1.62 0.35 9X 0.25 0.10 0.05 C A B C ALL FEATURES BOTTOM VIEW NOTES: A. PACKAGE CONFORMS TO JEDEC REGISTRATION MO-255, VARIATION UABD . B. DIMENSIONS ARE IN MILLIMETERS. C. DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. D. PRESENCE OF CENTER PAD IS PACKAGE SUPPLIER DEPENDENT. IF PRESENT IT IS NOT INTENDED TO BE SOLDERED AND HAS A BLACK OXIDE FINISH. E. DRAWING FILENAME: MKT-MAC10Arev5. Figure 20. 10-Lead MicroPak™ MLP Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 12 FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface Physical Dimensions (Continued) FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface © 2010 Fairchild Semiconductor Corporation FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2 www.fairchildsemi.com 13