ADP8863 Analog Devices, ADP8863 Datasheet
ADP8863
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ADP8863 Summary of contents
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... RGB LED color generation and mixing General backlighting of small format displays GENERAL DESCRIPTION The ADP8863 combines a powerful charge pump driver with advanced autonomous LED lighting features. It allows as many as seven LEDs to be independently driven (maximum). The seventh LED can also be driven (maximum) ...
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... Backlight Operating Levels ....................................................... 16 Backlight Turn On/Turn Off/Dim ........................................... 16 Automatic Dim and Turn Off Timers ..................................... 16 Fade Override ............................................................................. 17 Ambient Light Sensing .............................................................. 17 Automatic Backlight Adjustment ............................................. 18 Using the ADP8863 to Drive Additional LEDs ...................... 19 Operating LEDs from Alternative Supplies ............................ 20 Short-Circuit Protection Mode ................................................ 21 Overvoltage Protection .............................................................. 21 Thermal Shutdown/Overtemperature Protection ................. 21 Interrupts ..................................................................................... 21 Applications Information ...
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... Rev Page 0.4 V, Capacitor μF, Capacitor μF, D1:D7 Min Typ 2.5 2.05 1. mA, 4.5 0 26.2 30 24.4 52.5 60 48.8 2.0 1.5 0.5 3.0 3.8 4.3 4.9 162 200 180 100 0.70 1.08 4.3 0.54 ADP8863 = −40° Max Unit 5 μs μA 1.0 μA 7.2 mA 1.32 MHz % 34 0.5 μA Ω Ω Ω 5.5 V 276 mV mV μ ...
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... ADP8863 Parameter FAULT PROTECTION Start-Up Charging Current Source Output Voltage Threshold Exit Soft Start Short-Circuit Protection Output Overvoltage Protection Activation Level OVP Recovery Hysteresis Thermal Shutdown Threshold Hysteresis Isolation from Input to Output During Fault Time to Validate a Fault INTERFACE Operating V Voltage ...
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... A(MAX) LFCSP package, the exposed pad must be soldered to GND. Table 3. Thermal Resistance Package Type WLCSP LFCSP 1 N/A stands for not applicable. ESD CAUTION Rev Page Therefore, in situations where the ADP8863 − (θ × J(MAX) JA D(MAX) , θ (junction to board), and θ ...
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... ADP8863 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TOP VIEW D1 3 (Not to Scale) 4 SCL nRST 5 NOTES 1. CONNECT THE EXPOSED PADDLE TO GND1 AND/OR GND2. Figure 3. LFCSP Pin Configuration Table 4. Pin Function Descriptions Pin No. LFCSP WLCSP Mnemonic Description 14 A3 VIN Input Voltage, 2 5.5 V. ...
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... V ( 0.4V D1: 2.0 2.5 3.0 3.5 4.0 4.5 V (V) IN Figure 9. Typical Diode Matching vs –40° D1:D7 +25°C +85°C 5 +105° 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 V (V) HR ADP8863 = 1 μF, OUT 1.6 1.8 2 5.0 5 3.6V = 30mA 1.8 2 ...
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... ADP8863 3. 30mA D1: 0.2 0.4 0.6 0.8 1.0 1.2 V (V) HR Figure 11. Typical Diode Current vs. Current Sink Headroom Voltage ( 3. 0.40V D1:D7 0 –1 –2 –3 –4 –5 –6 –40 – JUNCTION TEMPERATURE (°C) Figure 12. Typical Change In Diode Current vs. Temperature 100mA OUT ...
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... I 10 OUT I OUT 80 110 0 2.5 ) OUT(REG OUT 80 110 Figure 22. Typical Operating Waveforms 1× Rev Page ADP8863 = 140mA 3.1V = 210mA 3.2V 3.0 3.5 4.0 4.5 5.0 V (V) IN Figure 20. Typical Efficiency (Low Vf Diode) = 140mA 3.85V = 210mA 4.25V 3.0 3.5 4.0 4.5 5.0 V (V) IN Figure 21. Typical Efficiency (High Vf Diode (AC-COUPLED) 50mV/DIV ...
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... ADP8863 T V (AC-COUPLED) 50mV/DIV (AC-COUPLED) 50mV/DIV OUT 2 I (AC-COUPLED) 10mA/DIV 1µ 1µ 1µ 1µF IN OUT 120mA OUT Figure 23. Typical Operating Waveforms 1.5× (AC-COUPLED) 50mV/DIV (AC-COUPLED) 50mV/DIV OUT 2 I (AC-COUPLED) 10mA/DIV 1µ 1µ ...
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... THEORY OF OPERATION The ADP8863 combines a powerful LED charge pump driver with independent control seven LEDs. These LED drivers can sink (typical) on six channels. The seventh LED can also be driven (typical). All LEDs can be individually programmed or combined into a group to ...
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... LEDs. Because a fixed charging and discharging combination must be used, only certain multiples of gain are available. The ADP8863 is capable of automatically optimizing the gain (G) from 1×, 1.5×, and 2×. These gains are accomplished with two capacitors (labeled C1 and C2 in Figure 26) and an internal switching network 1× ...
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... C commands are acknowledged (all registers are 2 C commands. nRST MUST BE HIGH FOR 20µs (MAX) 2 BEFORE SENDING I C COMMANDS nRST IS LOW, WHICH FORCES STANDBY 2 LOW AND RESETS ALL I C REGISTERS GAIN CHANGES OCCUR ONLY WHEN NECESSARY, BUT HAVE A MIN TIME BEFORE CHANGING SOFT START ADP8863 2 C receivers. ...
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... The law and SC_LAW bits in Register 0x04 and Register 0x0F, respectively, are used to change between these algorithms. By default, the ADP8863 uses a linear algorithm (law and SC_LAW = 00), where the LED current increases linearly for a corresponding increase in input code. LED current (in milliamperes) is determined by the following equation: LED Current (mA) = Code × ...
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... All numbers are out of a maximum of 255. Thus, the percentage of red is 7.1%, the percentage of green is 74.5%, and the percentage of blue is 37.6%. To generate the color with the ADP8863, scale this value to each of the current drivers. AUTOMATED RGB COLOR FADES The ADP8863 is easily programmed to cycle through RGB generated colors ...
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... ADP8863 BACKLIGHT OPERATING LEVELS Backlight brightness control operates at three distinct levels: daylight (L1), office (L2), and dark (L3). The BLV bits in Register 0x04 control the specific level at which the backlight operates. These bits can be changed manually or automatic mode (CMP_AUTOEN is set high in Register 0x01), by the ambient light sensor (see the Ambient Light Sensing section) ...
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... BL_EN = 1 (REASSERTED) Figure 39. Fade Override Function (FOVR Is High) AMBIENT LIGHT SENSING The ADP8863 integrates two ambient light sensing compara- tors. One of the ambient light sensing comparator pins (CMP_IN) is always available. The second pin (D6) has an ambient light sensor comparator (CMP_IN2) that can be activated rather than connecting an LED to D6 ...
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... ADP8863 L2_TRIP L2_HYS FILTER SETTINGS PHOTO SENSOR ADC L3_TRIP OUTPUT L3_HYS Figure 41. Ambient Light Sensing and Trip Comparators The L2 comparator, L2_CMPR, detects when the photosensor output has dropped below the programmable L2_TRP point (Register 0x1D). If this event occurs, then the L2_OUT status signal is set ...
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... Adding Additional Parallel Sinks The ballast resistor’s compromises of efficiency and matching are not suitable for many applications. Therefore, another option is to use the ADP8863 charge pump to power additional current sinks. First, the charge pump must be optimized for this (5) option by setting the GDWN_DIS bit in Register 0x01, which ...
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... VOUT VIN 1µF 1µF nRST SDA C1+ C1 SCL 1µF C1– nINT C2+ C2 1µF C2– Figure 45. Connecting the ADP8863 to an ADP8861 to Power More LEDs VIN 1µF (7) nRST SDA SCL nINT (276 mV, given in Rev Page ADP8861 GNDx D1 D2 ...
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... An interrupt flag is set at each OVP instance. THERMAL SHUTDOWN/OVERTEMPERATURE PROTECTION If the die temperature of the ADP8863 rises above a safe limit (150°C typical), the controllers enter thermal shutdown (TSD) protection mode. In this mode, most of the internal functions ) should be small shut down, the part enters standby, and the TSD_INT interrupt (Register 0x02) is set ...
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... ADP8863 1 VOUT < V – OVP V OVP(HYS) 0 VOUT > V OVP FAULT 1 1 VOUT < V – OVP V OVP(HYS) 0 VOUT > V OUT(REG) OVP FAULT 1 TRY TO REGULATE VOUT OUT(REG) VOUT > V OVP 1 VOUT < V – OVP V OVP(HYS) 0 VOUT > V OUT(REG) OVP FAULT 1 TRY TO REGULATE ...
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... APPLICATIONS INFORMATION The ADP8863 allows the charge pump to operate efficiently with a minimum of external components. Specifically, the user must select an input capacitor (C ), output capacitor (C IN charge pump fly capacitors (C1 and C2). C greater. The value must be high enough to produce a stable input voltage signal at the minimum input voltage and maximum output load μ ...
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... ADP8863 I C PROGRAMMING AND DIGITAL CONTROL 2 The ADP8863 provides full software programmability to facili- tate its adoption in various product architectures. The I is 0101011x ( during write during read). Therefore, the write address is 0x56 and the read address is 0x57. Note the following general behavior of registers: • ...
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... L2 comparator reference L2 hysteresis L3 comparator reference L3 hysteresis First phototransistor ambient light level—low byte register First phototransistor ambient light level—high byte register Second phototransistor ambient light level—low byte register Second phototransistor ambient light level—high byte register Rev Page ADP8863 ...
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... ADP8863 Table 9. Register Map Addr (Hex) Reg. Name Bit 7 Bit 6 0x00 MFDVID 0x01 MDCR Reserved INT_CFG 0x02 MDCR2 0x03 INTR_EN 0x04 CFGR Reserved SEL_AB 0x05 BLSEN Reserved D7EN 0x06 BLOFF Reserved 0x07 BLDIM Reserved 0x08 BLFR 0x09 BLMX1 Reserved 0x0A BLDM1 ...
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... LEDs are off. The charge pump switches up in gain as needed. This feature is useful if the ADP8863 charge pump is used to drive an external load. This feature must be used when utilizing small fly capacitors (0402 or smaller). ...
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... ADP8863 Mode Control Register 2 (MDCR2)—Register 0x02 Table 13. MDCR2 Bit Map Bit 7 Bit 6 Bit 5 Bit 4 Reserved SHORT_INT Table 14. Bit Descriptions for the MDCR2 Register Bit Name Bit No. Description N/A [7:5] Reserved. SHORT_INT 4 Short-circuit error interrupt short-circuit or overload condition on VOUT has been detected. ...
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... LED4 as an independent sink 0 = connects LED4 sink to backlight enable (BL_EN) Diode 3 backlight sink enable 1 = selects LED3 as an independent sink 0 = connects LED3 sink to backlight enable (BL_EN) Rev Page Bit 3 Bit 2 Bit 1 BLV Law Bit 2 Bit 1 D3EN D2EN ADP8863 Bit 0 FOVR Bit 0 D1EN ...
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... ADP8863 Bit Name Bit No. D2EN 1 D1EN 0 Backlight Off Timeout (BLOFF)—Register 0x06 Table 21. BLOFF Bit Map Bit 7 Reserved Table 22. Bit Descriptions for the BLOFF Register Bit Name Bit No. Description N/A 7 Reserved. OFFT [6:0] Backlight off timeout. After the off timeout (OFFT) period, the backlight turns off. If the dim timeout (DIMT) is enabled, the off timeout starts after the dim timeout ...
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... When fade in and fade out are disabled, the backlight does not instantly fade, but instead, fades rapidly within about 100 ms. Bit 4 Bit 3 Bit Rev Page ADP8863 Bit 1 Bit 0 BL_FI ...
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... ADP8863 Backlight Level 1 (Daylight) Maximum Current Register (BLMX1)—Register 0x09 Table 27. BLMX1 Bit Map Bit 7 Bit 6 Reserved Table 28. Bit Descriptions for the BLMX1 Register Bit Name Bit No. Description N/A 7 Reserved. BL1_MC [6:0] Backlight Level 1 (daylight) maximum current. The backlight maximum current can be set according to the linear or square law function (see Table 29 for a complete list of values) ...
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... Cubic 10 and Cubic 11 laws use the square law DAC setting but vary the time 17.501 step per DAC code (see the 17.863 18.230 Rev Page ADP8863 Linear Law (mA) Square Law (mA) 23.622 18.600 23.858 18.974 24.094 19.351 24.331 19 ...
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... ADP8863 Backlight Level 1 (Daylight) Dim Current Register (BLDM1)—Register 0x0A Table 30. BLDM1 Bit Map Bit 7 Bit 6 Reserved Table 31. Bit Descriptions for the BLDM1 Register Bit Name Bit No. Description N/A 7 Reserved. BL1_DC [6:0] Backlight Level 1 (daylight) dim current. The backlight is set to the dim current value after a dim timeout or if the DIM_EN flag is set by the user (see Table 29 for a complete list of values) ...
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... Square Law (mA) 0 0.000 0.236 0.002 0.472 0.007 0.709 0.017 … … Bit 5 Bit 4 Bit 3 BL3_MC Linear Law (mA) Square Law (mA) 0 0.000 0.236 0.002 0.472 0.007 0.709 0.017 … … Rev Page ADP8863 Bit 2 Bit 1 Bit 0 Bit 2 Bit 1 Bit 0 ...
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... ADP8863 Backlight Level 3 (Dark) Dim Current Register (BLDM3)—Register 0x0E Table 38. BLDM3 Bit Map Bit 7 Bit 6 Reserved Table 39. Bit Descriptions for the BLDM3 Register Bit Name Bit No. Description N/A 7 Reserved. BL3_DC [6:0] Backlight Level 3 (dark) dim current. See Table 29 for a complete list of values. The backlight is set to the dim current value after a dim timeout or if the DIM_EN flag is set by the user ...
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... This enable acts upon LED3 SC3 is turned on SC3 is turned off. This enable acts upon LED2 SC2 is turned on SC2 is turned off. This enable acts upon LED1 SC1 is turned on SC1 is turned off. Bit 4 Bit 3 SC7OFF SC6OFF Rev Page ADP8863 Bit 2 Bit 1 Bit 0 SC5OFF ...
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... ADP8863 Independent Sink Current Time (ISCT2)—Register 0x12 Table 46. ISCT2 Bit Map Bit 7 Bit 6 Bit 5 SC4OFF Table 47. Bit Descriptions for the ISCT2 Register 1, 2 Bit Name Bit No. Description SC4OFF [7:6] SC4 off time. When the SC off time is disabled, the ISC remains on while enabled. When the SC off time is set to any other value, the ISC turns off for the off time (per the following listed times) and then turns on according to the SCON setting ...
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... Bit 4 Bit 3 Bit 2 Rev Page ADP8863 Bit 1 Bit 0 SCFI ...
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... ADP8863 Sink Current Register LED7 (ISC7)—Register 0x14 Table 50. ISC7 Bit Map Bit 7 Bit 6 Bit 5 SCR Table 51. Bit Descriptions for the ISC7 Register Bit Name Bit No. Description SCR Sink Current Sink Current 0. SCD7 [6:0] For Sink Current 0, use the following DAC code schedule (see Table 29 for a complete list of values). ...
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... Cubic 10 and Cubic 11 laws use the square law DAC setting but vary the time step per DAC code (see the Rev Page ADP8863 Linear Law (mA) Square Law (mA) 41.57 28.808 42.05 29.466 42.52 30.132 42.99 30.806 43.46 31.486 43 ...
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... ADP8863 Sink Current Register LED6 (ISC6)—Register 0x15 Table 53. ISC6 Bit Map Bit 7 Bit 6 Reserved Table 54. Bit Descriptions for the ISC6 Register Bit Name Bit No. Description N/A 7 Reserved. SCD6 [6:0] Sink current. Use the following DAC code schedule (see Table 29 for a complete list of values). ...
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... Bit 5 Bit 4 Bit 3 SCD1 Linear Law (mA) Square Law (mA) 0 0.000 0.236 0.002 0.472 0.007 0.709 0.017 … … Rev Page ADP8863 Bit 2 Bit 1 Bit 0 Bit 2 Bit 1 Bit 0 Bit 2 Bit 1 Bit 0 ...
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... ADP8863 COMPARATOR REGISTER DESCRIPTIONS Comparator Configuration (CCFG)—Register 0x1B Table 65. CCFG Bit Map Bit 7 Bit 6 Bit 5 FILT Table 66. Bit Descriptions for the CCFG Register Bit Name Bit No. Description FILT [7:5] Filter setting for the CMP_IN light sensor. 000 = 80 ms 001 = 160 ms 010 = 320 ms ...
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... Although codes above 11111010 (250 decimal) are possible, they should not be used. Furthermore, the maximum value of L2_TRP + L2_HYS must not exceed 11111010 (250). Bit 4 Bit 3 Bit 2 L2_TRP Bit 4 Bit 3 Bit 2 L2_HYS Rev Page ADP8863 Bit 1 Bit 0 Bit 1 Bit 0 ...
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... ADP8863 Comparator Level 3 Threshold (L3_TRP)—Register 0x1F Table 73. L3_TRP Bit Map Bit 7 Bit 6 Bit 5 Table 74. Bit Descriptions for the L3_TRP Register Bit Name Bit No. Description L3_TRP 7:0 Comparator Level 3 threshold. If the comparator input is below L3_TRP, the comparator trips and the backlight enters Level 3 (dark) mode. The following lists the code settings for photosensor current: 00000000 = 0 μ ...
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... Upper five bits of the 13-bit conversion value for the second light sensor (Bit 12 to Bit 8). The value is updated every 80 ms (when the light sensor is enabled). This is a read-only register. Bit 4 Bit 3 Bit 2 PH1LEV_HIGH Bit 4 Bit 3 Bit 2 PH2LEV_LOW Bit 4 Bit 3 Bit 2 PH2LEV_HIGH Rev Page ADP8863 Bit 1 Bit 0 Bit 1 Bit 0 Bit 1 Bit 0 ...
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... ADP8863 OUTLINE DIMENSIONS PIN 1 INDICATOR 0.80 0.75 0.70 SEATING PLANE 4.10 0.30 4.00 SQ 0.25 3.90 0.20 16 0.50 15 BSC EXPOSED PAD 11 10 0.50 TOP VIEW BOTTOM VIEW 0.40 0.30 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.20 REF COMPLIANT TO JEDEC STANDARDS MO-220-WGGD. Figure 51. 20-Lead Lead Frame Chip Scale Package [LFCSP_WQ × Body, Very Very Thin Quad (CP-20-10) Dimensions shown in millimeters Figure 52 ...
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... Dimensions shown in millimeters DIRECTION OF FEED Figure 54. Tape and Reel Orientation for WLCSP Units Package Description 20-Lead LFCSP_WQ, 7” Tape and Reel 20-Ball WLCSP, 7” Tape and Reel Daughter Card 2 USB-to-I C Adapter Board Rev Page ADP8863 1.60 C REF D E ...
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... ADP8863 NOTES Rev Page ...
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... NOTES Rev Page ADP8863 ...
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... ADP8863 NOTES refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08392-0-6/10(A) Rev Page ...