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Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. FAN5702 Configurable 180 mA 6-LED Driver with I2C Control Features Description The FAN5702 is a highly integrated and configurable chargepump-based multi-LED driver. The device can drive up to six LEDs in parallel with a total output current of 180 mA. Regulated internal current sinks deliver excellent current and brightness matching to all LEDs. Six (6) Parallel LEDs (up to 30 mA Each) Total Package Load Current Capability: 180 mA Group from 2 to 6 LEDs for Flexible Backlighting I2C Interface for Easy Programming 2 >600:1 Dimming Ratio for 100 Hz PWM Frequency Logarithmically Controlled Dimming with 64 Steps Secondary Brightness Control Using PWM Dimming up to 20 kHz in Conjunction with I2C Dimming - Dynamic Backlight Control (DBC) to Reduce Current Consumption Up to 92% Efficiency 1.2 MHz Switching Frequency for Small-Sized Capacitors 16-Bump 1.6 mm x 1.6 mm WLCSP (0.6 mm Height) Built-in 1.5x Charge Pump with Low Drop-Out Bypass Switch and automatic switching to 1x mode 16-Lead 3.0 mm x 3.0 mm UMLP (0.55 mm Height) Applications The FAN5702 has an I C interface that allows the user to independently control the brightness with a default grouping of 2,1,1,1,1 for a maximum of five independent lighting channels. The LED driver can be programmed in a multitude of configurations to address broad lighting requirements for 2 different platforms. Each LED can be configured through I C as five independent channels (Group A has two LEDs by default) or any additional LEDs can join Group A to increase the backlighting needs as the display size increases. The device offers a second dimming control using the EN/PWM pin. Applying a PWM dimming signal to this pin allows control of the dimming of Group A LEDs so that the average current is the linear value multiplied by the PWM dimming duty-cycle. The device provides excellent efficiency, without an inductor, by operating the charge pump in 1.5x or pass-through mode. The FAN5702 can be ordered with default ISET values of 30 mA, 20 mA, 15 mA, or 8 mA. The default ISET is always determined by the ISET ordered (see Ordering Information). LCD Backlighting Mobile Handsets / Smartphones Portable Media Players Ordering Information Part Number LED Current (ISET) FAN5702UC30X 30 mA FAN5702UC20X 20 mA FAN5702UC15X 15 mA FAN5702UC08X 8 mA FAN5702UMP30X 30 mA FAN5702UMP20X 20 mA FAN5702UMP15X 15 mA FAN5702UMP08X 8 mA (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 Temperature Range Package Packing WLCSP-16, 0.4 mm Pitch Tape and Reel UMLP-16, 3.0 x 3.0 x 0.55 mm Tape and Reel -40 to 85C www.fairchildsemi.com FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control May 2016 VOUT C1+ 1F 1F C1- 1F CHARGE PUMP D1A C2- D2A 1F CURRENT SINKS VIN GND EN / PWM SDA SCL LOGIC AND CONTROL Figure 1. (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 D3 D4 D5 D6 GROUP A expandable to 6 LEDs C2+ COUT Typical Application www.fairchildsemi.com 2 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Typical Application A1 A2 A3 A4 A4 A3 A2 A1 B1 B2 B3 B4 B4 B3 B2 B1 C1 C2 C3 C4 C4 C3 C2 C1 D1 D2 D3 D4 D4 D3 D2 D1 Bumps Facing Down Figure 2. Bumps Facing Up WLCSP-16, 0.4 mm Pitch, 1.61 x 1.61 mm Pin Definitions Pin # Name Description D2 VIN Input Supply Voltage. Connect to 2.7 - 5.5 VDC input power source. B4 GND Ground D1 VOUT Charge Pump Output Voltage. Connect to LED anodes. D3 ,D4 C1+, C1- Charge pump flying capacitor #1 C3, C4 C2+, C2- Charge pump flying capacitor #2 A1,A2 B1,B2 C1,C2 D2A, D1A D4,D3 D6,D5 LED Outputs A4 EN / PWM Enable / PWM dimming input. By default, this pin acts as a simple enable / disable function. When this pin is HIGH, normal operation is enabled. When LOW, the IC is reset and all functions 2 (including I C communications) are disabled. By setting General Purpose register bit 7 = 1, the pin functions as a PWM dimming input for Group A. To restore the Enable function, the General Purpose register bit 7 must be set LOW. B3 SDA I C interface serial data A3 SCL I C interface serial clock 2 2 (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 www.fairchildsemi.com 3 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control WLCSP Pin Configuration FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control UMLP Pin Configuration 5 8 9 4 12 1 16 13 Bottom View Figure 3. UMLP-16, 0.5 mm Pitch, 3 mm x 3 mm Pin Definitions Pin # Name Description 11 VIN Input Supply Voltage. Connect to 2.7 - 5.5 VDC input power source. 6 GND Ground Charge Pump Output Voltage. Connect to LED anodes. 12 VOUT 10,9 C1+, C1- Charge pump flying capacitor #1 8,7 C2+, C2- Charge pump flying capacitor #2 1, 2 15, 16 13, 14 D2A, D1A D4,D3 D6,D5 LED Outputs 4 EN / PWM Enable / PWM dimming input. By default, this pin acts as a simple enable / disable function. When this pin is HIGH, normal operation is enabled. When LOW, the IC is reset and all functions 2 (including I C communications) are disabled. By setting General Purpose register bit 7 = 1, the pin functions as a PWM dimming input for Group A. To restore the Enable function, the General Purpose register bit 7 must be set LOW. 5 SDA I C interface serial data 3 SCL I C interface serial clock 2 2 (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 www.fairchildsemi.com 4 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 Parameter VIN, VOUT Pins Other Pins (1) Min. Max. Unit -0.3 6.0 V VIN + 0.3 V -0.3 Human Body Model per JESD22-A114 3 Charged Device Model per JESD22-C101 2 ESD Electrostatic Discharge Protection Level TJ Junction Temperature -40 +150 C TSTG Storage Temperature -65 +150 C +260 C TL Lead Soldering Temperature, 10 Seconds kV Note: 1. Lesser of VIN + 0.3 or 6.0 V. 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 VIN Parameter Supply Voltage Min. Max. Unit 2.7 5.5 V 4 V VLED LED Forward Voltage 2 TA Ambient Temperature -40 +85 C TJ Junction Temperature -40 +125 C Typ. Max. Unit Thermal Properties Symbol JA Parameter Min. Junction-to-Ambient Thermal Resistance WLCSP 80 UMLP 49 C/W Note: 2. Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with four-layer 2s2p boards in accordance to JESD51-7 JEDEC standard. Special attention must be paid not to exceed junction temperature TJ(max) at a given ambient temperate TA. (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 www.fairchildsemi.com 5 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Absolute Maximum Ratings Unless otherwise specified: VIN = 2.7 V to 5.5 V; TA = -40C to +85C; and ENA, EN3, EN4, EN5, and EN6 = 1. Typical values are VIN = 3.6 V, TA = 25C, ILED = 20 mA, and LED cathode terminals = 0.4 V. Circuit and components are according to Figure 1. Symbol Parameter Conditions Min. Typ. Max. Unit Power Supplies and Thermal Protection 1.5x Mode, No LEDs 4.4 1x Mode, No LEDs 0.3 Shutdown Supply Current EN = 0, VIN = 4.5V, TA = -40C to +85C 0.1 2.0 VUVLO Under-Voltage Lockout Threshold VIN Rising 2.55 2.70 VUVHYST Under-Voltage Lockout Hysteresis 150 mV TLIMIT Thermal Shutdown 150 C THYST Thermal Shutdown Hysteresis 20 C IQ Quiescent Supply Current ISD VIN Falling 2.20 mA 2.40 A V LED Current Sinks ILED ILED(MAX) ILED_MATCH VDTH VHR Absolute Current Accuracy (3) Maximum Diode Current LED Current Matching (4) 1x to 1.5x Gain Transition Threshold Current Sink Headroom (5) VCATHODE = 0.4 V; see options for ISET -10% ISET +10% mA ILED = ISET 30 VCATHODE = 0.4 V, ILED = ISET 0.4 LED Cathode Voltage Falling 100 mV ILED = 90% ILED(NOMINAL) 65 mV mA 3.0 % PWM Dimming fPWM PWM Switching Frequency tON_LED(MINIMUM) = 15 s DPWM PWM Duty-Cycle fPWM = 100 Hz 0.15 20 kHz 100.00 % Charge Pump ROUT fSW tSTART Output Resistance 1.5x Mode 2.4 1x Mode 0.9 Switching Frequency Startup Time 0.9 VOUT = 90% of VIN 1.2 1.5 250 MHz s Logic Inputs (EN, SDA, SCL) VIH HIGH-Level Input Voltage VIL LOW-Level Input Voltage VIMAX IIN 1.2 Maximum Input Voltage Input Bias Current Input Tied to GND or VIN V 0.4 V 1.8 5.5 V 0.01 1.00 A Notes: 3. The maximum total output current for the IC should be limited to 180 mA. The total output current can be split between the two groups (IDxA = IDxB = 30 mA maximum). Under maximum output current conditions, special attention must be given to input voltage and LED forward voltage to ensure proper current regulation. See the Maximum Output Current section of the datasheet for more information. 4. For the two groups of current sinks on a part (group A and group B), the following are determined: the maximum sink current in the group (MAX), the minimum sink current in the group (MIN), and the average sink current of the group (AVG). For each group, two matching numbers are calculated: (MAX-AVG)/AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is considered the matching value for the group. The matching value for a given part is considered to be the highest matching value of the two groups. The typical specification provided is the most likely norm of the matching value for all parts. 5. For each Dxx pin, headroom voltage is the voltage across the internal current sink connected to that pin. VHRx = VOUT VLED. If headroom voltage requirement is not met, LED current regulation is compromised. (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 www.fairchildsemi.com 6 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Electrical Specifications VIN = 3.6 V, TA = 25C, ILED = 20 mA, and LED cathode terminals = 0.4 V. Figure 4. Efficiency with LED Current of 8 mA and 20 mA Figure 6. LED Current Variation vs. Temperature Figure 8. Switching Frequency Over-Temperature with LED Current at 20 mA (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 Figure 5. Figure 7. LED Current Match for all 6 LED Channels at ILED=20 mA Shutdown Current vs. Input Voltage www.fairchildsemi.com 7 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Typical Characteristics VIN = 3.6 V, TA = 25C, ILED = 20 mA, and LED cathode terminals = 0.4 V. Figure 9. Mode Transition from 1x to 1.5x Mode Using PWM Control (VCATHODE Ramp Up) at 2% Duty Cycle Figure 10. Mode Transition from 1.5x to 1x Mode Using PWM Control (VCATHODE Ramp Down) at 2% Duty Cycle Figure 11. Line Transient Response in 1x Mode, VIN=3.6 V - 4.2 V, ILEDx=20 mA Figure 12. Figure 13. Line Transient from 1x to 1.5x Mode, VIN=3.2 V - 4.1 V, ILEDx=20 mA (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 Line Transient Response in 1.5x Mode, VIN=2.7 V - 3.3 V, ILED=20 mA Figure 14. Soft-Start with SDA and SCL www.fairchildsemi.com 8 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Typical Characteristics 2 Figure 15. Linear Dimming via I C Interface, VIN=3.6 V, ILEDx=20 mA, and tRAMP=6.4 ms Figure 16. PWM Dimming, VIN=3.6 V, ILEDx=20 mA, and EN=1 kHz with 20% Duty Cycle 2 Figure 17. PWM and Linear (via I C) Dimming, VIN=3.6 V, ILEDx=20 mA, and EN=1 kHz with 20% Duty Cycle (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 www.fairchildsemi.com 9 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Typical Characteristics Guaranteed by design. Symbol Parameter Conditions fSCL SCL Clock Frequency tBUF Bus-Free Time between STOP and START Conditions tHD;STA SCL LOW Period tHIGH Repeated START Setup Time tSU;DAT Data Setup Time tHD;DAT Data Hold Time tRCL SCL Rise Time tFCL SCL Fall Time tRDA SDA Rise Time 4.7 Fast Mode 1.3 Unit kHz s 4 s Fast Mode 600 ns Standard Mode 4.7 s Fast Mode 1.3 ns 4 s 600 ns 4.7 s 600.0 ns Standard Mode 250 ns Fast Mode 100 ns Standard Mode 0 3.45 s Fast Mode 0 900.00 ns Standard Mode 20+0.1CB 1000 ns Fast Mode 20+0.1CB 300 ns Standard Mode 20+0.1CB 300 ns Fast Mode 20+0.1CB 300 ns Standard Mode 20+0.1CB 1000 ns Fast Mode 20+0.1CB 300 ns Standard Mode 20+0.1CB 300 ns Fast Mode 20+0.1CB 300 ns Standard Mode Stop Condition Setup Time CB Standard mode Fast Mode SDA Fall Time tSU;STO 400 Standard Mode (6) tFDA 100 Fast Mode tSU;STA Max. Fast Mode Standard Mode SCL HIGH Period Typ. Standard Mode Standard Mode START or Repeated START Hold Time tLOW Min. Fast Mode 4 s 600 Capacitive Load for SDA and SCL ns 400 pF Note: 6. Rise time of SCL after a repeated START condition and after an ACK bit. Timing Diagram tF tSU;STA tBUF SDA tR TSU;DAT tHD;STO tHIGH SCL tLOW tHD;STA tHD;DAT tHD;STA REPEATED START START Figure 18. (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 STOP START 2 I C Interface Timing for Fast and Slow Modes www.fairchildsemi.com 10 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control I2C Timing Specifications The FAN5702 is a white LED driver system based on an adaptive 1.5x charge pump capable of supplying up to 180 mA of total output current. The tightly matched current sinks ensure uniform brightness between the LEDs. Each LED has a common anode configuration with its peak drive current set during manufacturing (see Ordering Information 2 and ISET). An I C-compatible interface is used to vary the brightness within the individual current sinks as well as configure the grouping. Each LED is controlled with 64 exponentially spaced analog brightness control levels 2 through I C, as indicated in Table 1. For maximum flexibility, the FAN5702 can be programmed with five independently controlled LED banks; by default, arranged as 2,1,1,1,1 (first 2 two LEDs represent Group A). Through I C, the device can be reconfigured to add up to six LEDs to Group A as needed by application requirements. Register Controlled Brightness The DC value of the LED current is modulated according to the values in Table 1. Current is expressed as a percentage of the full scale current and is illustrated with a 20 mA ISET. Table 1. Charge Pump The charge pump operates in either 1x mode, where VOUT is connected to VIN through a bypass switch, or in 1.5x mode. The circuit operates in 1x mode until the LED with the highest forward voltage (VLED(MAX)) can no longer maintain current regulation. At that point, 1.5x Mode begins. If the lowest active cathode voltage is greater than 1.8 V, the charge pump switches back to 1x Mode. IC Enable By default the General Purpose register bit 7 = 0, the EN pin functions as enable/disable. When the EN pin is LOW, all 2 circuit functions, including I C, are disabled and the registers are set to their default values. 2 When the EN pin HIGH, I C interface is enabled. The LEDs can be turned on/off by writing to the General Purpose 2 register. The user can always communicate via I C with the device to change register settings regardless of whether any LED is on or off. PWM Dimming By programming the General Purpose register bit 7 = 1, the EN pin is reappropriated to a PWM dimming input. Applying a PWM signal to this pin controls the LED current waveform to be ON when the PWM dimming pin is HIGH and OFF when the PWM dimming pin is LOW. By using this pin in 2 conjunction with the I C register dimming, the part can achieve higher dimming resolution. For instance, an 8-bit PWM dimming signal applied along with the 6-bit register dimming yields better than 14 bits of resolution To change the PWM dimming pin back to the EN function, set the General Purpose register bit 7 to 0. (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 Brightness Control Dimming Code (Bx5-Bx0) Current Level ILED (mA) (ISET=20 mA) 000000 000001 000010 000011 000100 000101 000110 000111 001000 001001 001010 001011 001100 001101 001110 001111 010000 010001 010010 010011 010100 010101 010110 010111 011000 011001 011010 011011 011100 011101 011110 011111 100000 100001 100010 100011 100100 100101 100110 100111 101000 101001 101010 101011 101100 101101 101110 101111 110000 110001 110010 110011 110100 110101 110110 110111 111000 111001 111010 111011 111100 111101 111110 111111 0.125% 0.188% 0.249% 0.312% 0.374% 0.438% 0.499% 0.560% 0.622% 0.692% 0.750% 0.810% 0.875% 0.938% 1.004% 1.124% 1.250% 1.375% 1.499% 1.625% 1.750% 1.881% 2.063% 2.249% 2.438% 2.687% 2.939% 3.186% 3.562% 3.936% 4.310% 4.813% 5.314% 5.936% 6.565% 7.313% 8.059% 8.938% 9.876% 10.874% 12.005% 13.253% 14.618% 16.124% 17.881% 19.875% 22.121% 24.621% 27.376% 30.373% 33.623% 37.124% 40.873% 44.875% 49.124% 53.624% 58.375% 63.378% 68.625% 74.122% 79.874% 85.873% 92.373% 100.000% 0.025 0.038 0.050 0.063 0.075 0.088 0.100 0.113 0.125 0.138 0.150 0.163 0.175 0.188 0.200 0.225 0.250 0.275 0.300 0.325 0.350 0.375 0.413 0.450 0.488 0.538 0.588 0.638 0.713 0.788 0.863 0.963 1.063 1.188 1.313 1.463 1.613 1.788 1.975 2.175 2.400 2.650 2.925 3.225 3.575 3.975 4.425 4.925 5.475 6.075 6.725 7.425 8.175 8.975 9.825 10.725 11.675 12.675 13.725 14.825 15.975 17.175 18.475 20.000 www.fairchildsemi.com 11 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Circuit Description Register Addressing When changing the group A brightness, the IC steps through the brightness table at rate programmed by the RAMP register, indicated in Table 2. Table 2. The FAN5702 has six user-accessible registers. Table 4. 2 I C Register Addresses Group A Brightness Ramp Control RAMP[1:0] Time per Step Default Value Full-Scale Ramp Time 00 0.1 ms 6.4 ms 01 25 ms 1600 ms 10 50 ms 3200 ms 11 100 ms 6400 ms VOUT Short-Circuit Protection The FAN5702 has integrated protection circuitry to prevent the device from being short circuited when the output voltage falls below 2 V. If this occurs, FAN5702 turns off the charge pump and the LED driver outputs, but a small bypass switch is left on. The device monitors the output voltage to determine if it is still in short circuit condition and, once it has passed, soft-starts and returns to normal operation. Address 7 6 5 4 3 2 1 0 HEX GENERAL 0 0 0 0 0 0 0 0 10 CONFIG 0 0 0 0 0 0 0 0 20 CHA 1 1 1 1 1 1 1 1 A0 CH3 1 1 1 1 1 1 1 1 30 CH4 1 1 1 1 1 1 1 1 40 CH5 1 1 1 1 1 1 1 1 50 CH6 1 1 1 1 1 1 1 1 60 Note: 7. Bold identifies bits that cannot be overwritten. Bus Timing As shown in Figure 19 data is normally transferred when SCL is LOW. Data is clocked in to the FAN5702 on the rising edge of SCL. Typically, data transitions shortly at or after the falling edge of SCL to allow ample time for the data to set up before the next SCL rising edge. VOUT Over-Voltage Protection If the output voltage goes above 6 V, the FAN5702 shuts down until this condition has passed. The charge pump and LED driver outputs are turned off. Once this condition has passed, the FAN5702 soft-starts into normal operation. Data change allowed 2 I C Interface SDA The FAN5702's serial interface is compatible with standard 2 and fast I C bus specifications. The FAN5702's SCL line is an input and its SDA line is a bi-directional open-drain output, meaning that it can only pull down the bus when active. The SDA line only pulls LOW during data reads and when signaling ACK. All data is shifted in MSB (bit 7) first. TH TSU SCL Figure 19. Slave Address Data Transfer Timing The FAN5702's slave address is 6CH. Each bus transaction begins and ends with SDA and SCL HIGH. A transaction begins with a START condition, which is defined as SDA transitioning from 1 to 0 with SCL HIGH, as shown in Figure 20. 2 Table 3. I C Slave Address 7 6 5 4 3 2 1 0 0 1 1 0 1 1 0 R/W SDA THD;STA Slave Address MS Bit SCL Figure 20. (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 Start Bit www.fairchildsemi.com 12 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Brightness Ramp Control Slave Releases Master Drives During a read from the FAN5702 (Figure 24, the master issues a "Repeated Start" after sending the register address and before resending the slave address. The "Repeated Start" is a 1-to-0 transition on SDA while SCL is HIGH, as shown in Figure 22. tHD;STO ACK(0) or NACK(1) SDA Slave Releases tSU;STA tHD;STA ACK(0) or NACK(1) SDA SLADDR MS Bit SCL SCL Figure 21. Stop Bit Figure 22. Repeated Start Timing Read and Write Transactions The following figures outline the sequences for data read and write. Bus control is signified by the shading of the packet, Master Drives Bus defined as Table 5. and Slave Drives Bus . All addresses and data are MSB first. 2 I C bit Definitions for Figure 23 and Figure 24. Symbol Definition S START. See Figure 20. A ACK. The slave drives SDA to 0 to acknowledge the preceding packet. A NACK. The slave sends a 1 to NACK the preceding packet. R Repeated START. See Figure 22 P STOP. See Figure 21. 7 bits S Slave Address 0 0 8 bits 0 8 bits 0 A Reg Addr A Data A Figure 23. 7 bits S Slave Address 0 0 8 bits 0 A Reg Addr A Figure 24. (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 P Write Transaction 7 bits R Slave Address 1 0 8 bits 1 A Data A P Read Transaction www.fairchildsemi.com 13 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control A transaction ends with a STOP condition, which is defined as SDA transitioning from 0 to 1 with SCL HIGH, as shown in Figure 21. The following tables define the operation of each register bit. Bold values are power-up defaults. These values apply only to 2 I C version of the part. Bit Name GENERAL Default Value Default: 00H Description General Purpose Register ADDR = 10H 0 Setting this bit=1 changes the EN pin to function as a PWM dimming input for group A LEDs. This bit must be set to zero for the chip to be disabled. 7 PWM 6,5 FS1, FS2 00 00=20 mA (default), 01=30 mA, 10=15 mA, 11=8 mA when I C is used. 4 EN6 0 Default=0 (Off), LED Channel Active=1 3 EN5 0 Default=0 (Off), LED Channel Active=1 2 EN4 0 Default=0 (Off), LED Channel Active=1 1 EN3 0 Default=0 (Off), LED Channel Active=1 0 ENA CONFIG 2 0 Default: 00H Default=0 (Off), LED Channel Active=1 Configuration Register ADDR = 20H 0 Tie channel 5 and 6 together. Default=0 (Separate). Group 5&6 =1. Both currents are set by CH5 register. T56 is overwritten by either S5A or S6A. 0 Tie channel 3 and 4 together. Default=0 (Separate). Group 3&4 =1. Both currents are set by the CH3 register. T34 is overwritten by either S3A or S4A. 7 T56 6 T34 5 S6A 0 CH6 group configuration. Independent=0 (default); part of group A=1. 4 S5A 0 CH5 group configuration. Independent=0 (default); part of group A=1. 3 S4A 0 CH4 group configuration. Independent=0 (default); part of group A=1. 2 S3A 0 CH3 group configuration. Independent=0 (default); part of group A=1. 1,0 RS1, RS0 00 Sets current ramp rate for group A channels CHA Default: FFH 7:6 Reserved 5:0 Brightness A CH3 Group A Brightness Control 7:6 5:0 11 Brightness 3 0 - 63 00 - 3FH Default: FFH 5:0 5:0 11 Brightness 4 0 - 63 00 - 3FH 5:0 6-bit value that controls channel 3 brightness per values in Table 1 Channel 5 Brightness Control 11 Brightness 5 0 - 63 00 - 3FH Default: FFH 7:6 ADDR = 40H Writing to these bits does not change their value. Reserved CH6 6-bit value that controls channel 3 brightness per values in Table 1 Channel 4 Brightness Control Default: FFH 7:6 ADDR=30H Writing to these bits does not change their value. Reserved CH5 6-bit value that controls group A brightness per values in Table 1 Channel 3 Brightness Control Reserved CH4 7:6 Vendor ID bits. These bits can be used to distinguish between vendors via I C. Writing to these bits does not change their value. 0 - 63 00 - 3FH Default: ADDR = A0H 2 11 ADDR = 50H Writing to these bits does not change their value. 6-bit value that controls channel 3 brightness per values in Table 1 Channel 6 Brightness Control Reserved 11 Brightness 6 0 - 63 00 - 3FH ADDR = 60H Writing to these bits does not change their value. 6-bit value that controls channel 3 brightness per values in Table 1 The table below pertains to the Marketing Outline drawing on the following page... Product-Specific Dimensions Product D E X Y FAN5702UCxx 1.610 mm 1.610 mm 0.205 mm 0.205 mm (c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.8 www.fairchildsemi.com 14 FAN5702 -- Configurable 180 mA 6-LED Driver with I2C Control Register Descriptions 3.00 A 3.000.10 1.75 B 3.000.10 PIN #1 IDENT 0.75, 16X TOP VIEW 0.30, 16X 0.50 0.150.05 0.500.05 C 3.00 1.75 LAND PATTERN RECOMMENDATION SEATING PLANE NOTES: A. DESIGN CONFORMS TO JEDEC MO-248 B. ALL DIMENSIONS ARE IN MILLIMETERS C. LAND PATTERN RECOMMENDATION FROM PCB MATRIX IPC LP CALCULATOR (V2009) D. DRAWING FILENAME: MKT-UMLP16BrevB 0.0250.025 SIDE VIEW 1.700.05 1 4 PIN #1 IDENT 16 5 0.50 1.700.05 8 13 0.370.05 (16X) 12 9 0.250.05 (16X) 0.10 0.05 0.50 C A B C BOTTOM VIEW ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor's product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. 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