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Charge Pump Driven 9-Channel LED Driver with

Automated LED Lighting Effects

Data Sheet

ADP8866

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FEATURES

Charge pump with automatic gain selection of 1×, 1.5×, and

2× for maximum efficiency

92% peak efficiency

9 independent and programmable LED drivers

Each driver is capable of 25 mA (full scale)

Each driver has 7 bits (128 levels) of nonlinear current

settings

Standby mode for <1 µA current consumption

16 programmable fade-in and fade-out times (0.0 sec to

1.75 sec) with choice of square or cubic rates

Automated and customizable LED blinking

Unique heartbeat mode for programmable double pulse

lighting effects on 4 channels (D6 to D9)

PWM input for implementing content adjustable brightness

control (cABC)

C compatible interface for all programming

Dedicated reset pin and built-in power on reset (POR)

Short circuit, overvoltage, and overtemperature protection

Internal soft start to limit inrush currents

Input to output isolation during faults or shutdown

Operates down to V

= 2.5 V, with undervoltage lockout

(UVLO) at 1.9 V

Small lead frame chip scale package (LFCSP)

APPLICATIONS

Mobile display backlighting

Mobile phone keypad backlighting

LED indication and status lights

Automated LED blinking

TYPICAL OPERATING CIRCUIT

09478-001

D3 D4

D5 D7D6

D8 D9

nRST

SDA

SCL

nINT

GND

VIN

1µF

C2+

C2–

1µF

C1+

C1–

1µF

VOUT

1µF

ADP8866

Figure 1.

GENERAL DESCRIPTION

The ADP8866 combines a programmable backlight LED charge

pump driver with automatic blinking functions. Nine LED drivers

can be independently programmed at currents up to 25 mA.

The current level, fade time, and blinking rate can be programmed

once and executed autonomously on a loop. Separate fade-in

and fade-out times can be set for the backlight LEDs.

Driving all of this is a two-capacitor charge pump with gains of

1×, 1.5×, and 2×. This setup is capable of driving a maximum

OUT

of 240 mA from a supply of 2.5 V to 5.5 V. A full suite of

safety features including short-circuit, overvoltage, and over-

temperature protection allows easy implementation of a safe

and robust design. Additionally, input inrush currents are

limited via an integrated soft start combined with controlled

input to output isolation.

Summary of content (52 pages)

PAGE 1
Charge Pump Driven 9-Channel LED Driver with Automated LED Lighting Effects ADP8866 Data Sheet FEATURES APPLICATIONS Charge pump with automatic gain selection of 1×, 1.5×, and 2× for maximum efficiency 92% peak efficiency 9 independent and programmable LED drivers Each driver is capable of 25 mA (full scale) Each driver has 7 bits (128 levels) of nonlinear current settings Standby mode for <1 µA current consumption 16 programmable fade-in and fade-out times (0.0 sec to 1.
PAGE 2
ADP8866 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Automated Fade-in and Fade-Out ........................................... 14 Applications ....................................................................................... 1 CABC Fade Disable.................................................................... 15 Typical Operating Circuit ................................................................
PAGE 3
Data Sheet ADP8866 SPECIFICATIONS VIN = 3.6 V, SCL = 2.7 V, SDA = 2.7 V, nINT = open, nRST = 2.7 V, VD1:D9 = 0.4 V, C1 = 1 μF, C2 = 1 μF, COUT = 1 μF, typical values are at TJ = 25°C and are not guaranteed. Minimum and maximum limits are guaranteed from TJ = −40°C to +105°C, unless otherwise noted. Table 1.
PAGE 4
ADP8866 Data Sheet Parameter Thermal Shutdown Threshold Hysteresis Isolation from Input to Output During Fault Time to Validate a Fault I2C INTERFACE VDDIO Voltage Operating Range Logic Low Input Logic High Input I2C TIMING SPECIFICATIONS Delay from Reset Deassertion to I2C Access SCL Clock Frequency SCL High Time SCL Low Time Setup Time Data Repeated Start Stop Condition Hold Time Data Start/Repeated Start Bus Free Time (Stop and Start Conditions) Rise Time (SCL and SDA) Fall Time (SCL and SDA) Pulse Wid
PAGE 5
Data Sheet ADP8866 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 2. Parameter VIN, VOUT to GND D1, D2, D3, D4, D5, D6, D7, D8, and D9 to GND nINT, nRST, SCL, and SDA to GND Output Short-Circuit Duration Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Soldering Conditions ESD (Electrostatic Discharge) Human Body Model (HBM) Charged Device Model (CDM) 1 Rating −0.3 V to +6 V −0.3 V to +6 V −0.
PAGE 6
ADP8866 Data Sheet 16 D8 18 D6 17 D7 20 D4 19 D5 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS D3 1 15 GND D2 2 14 VIN ADP8866 D1 3 13 VOUT TOP VIEW 12 C2+ D9 4 11 C1+ NOTES 1. CONNECT THE EXPOSED PADDLE TO GND. 09478-003 C2– 10 C1– 9 nINT 8 SCL 6 (Not to Scale) SDA 7 nRST 5 Figure 3. LFCSP Pin Configuration Table 4. Pin Function Descriptions Pin No.
PAGE 7
Data Sheet ADP8866 TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.6 V, SCL = 2.7 V, SDA = 2.7 V, nRST = 2.7 V, VD1:D9 = 0.4 V, IOUT = 0 mA, CIN = 1 μF, C1 = 1 μF, C2 = 1 μF, COUT = 1 μF, TA= 25°C, unless otherwise noted. 1400 400 1200 350 300 +105°C +85°C +25°C –40°C 800 IQ (OFF) (µA) IQ (µA) 1000 600 250 200 +105°C +85°C +25°C –40°C 150 400 100 200 3.5 4.0 VIN (V) 4.5 5.0 5.5 0 2.5 Figure 4. Typical Operating Current, G = 1× 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 09478-007 3.
PAGE 8
ADP8866 Data Sheet 0.1 1.6 ID1:D9 = 25mA IOUT = 100mA 0 1.4 –0.1 IOUT DEVIATION (%) 1.0 0.8 0.6 +105°C +85°C +25°C –40°C 0.4 –0.2 –0.3 –0.4 –0.5 –0.6 –0.7 0 2.5 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 09478-010 0.2 –0.8 –40 –15 10 35 60 TEMPERATURE (°C) 85 110 Figure 13. Typical Change in Diode Current vs. Temperature Figure 10. Typical Diode Matching vs. VIN 1.2 27.0 +105°C +85°C +25°C –40°C 26.5 IOUT = 100mA 1.0 0.8 25.5 ROUT (Ω) 25.0 0.4 24.5 0.2 24.0 23.5 0 2.5 0.4 0.
PAGE 9
Data Sheet ADP8866 6 1.4 IOUT = 100mA 1.2 5 1.0 3 2 0.8 VIL, +25°C VIH, +25°C VIL, –40°C VIH, –40°C VIL, +85°C VIH, +85°C VIL, +105°C VIH, +105°C 0.6 0.4 +105°C +85°C +25°C –40°C 0 2.2 2.3 0.2 2.4 2.5 VIN (V) 2.6 2.7 2.8 0 2.5 09478-016 1 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 09478-019 THRESHOLD (V) ROUT (Ω) 4 Figure 19. Typical I2C Thresholds, VIH and VIL Figure 16. Typical ROUT (G = 2×) vs. VIN 5.3 20 VOUT = 80% OF VIN 18 5.2 16 5.1 VOUT(REG) (V) 12 10 8 6 5.0 4.9 4.
PAGE 10
ADP8866 Data Sheet 100 T CIN = 1µF, COUT = 1µF, C1 = 1µF, C2 = 1µF VIN = 2.5V IOUT = 120mA 90 80 1 EFFICIENCY (%) 70 VIN (AC-COUPLED) 50mV/DIV 60 50 VOUT (AC-COUPLED) 50mV/DIV 2 40 VF = 3.4V VF = 4.0V 30 20 IIN (AC-COUPLED) 10mA/DIV 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 09478-022 0 2.5 09478-026 3 10 1µs/DIV Figure 22. Typical Efficiency (Each LED Set to 25 mA) Figure 25. Typical Operating Waveforms, G = 2× T CIN = 1µF, COUT = 1µF, C1 = 1µF, C2 = 1µF VIN = 3.
PAGE 11
Data Sheet ADP8866 THEORY OF OPERATION The ADP8866 combines a programmable backlight LED charge pump driver with automatic blinking functions. Nine LED drivers can be independently programmed at currents up to 25 mA. The current level, fade time, and blinking rate can be programmed once and executed autonomously on a loop. Separate fade-in and fade-out times can be set for the backlight LEDs. D1 D2 D3 D4 D5 Driving all of this is a two capacitor charge pump with gains of 1×, 1.5×, and 2×.
PAGE 12
ADP8866 Data Sheet POWER STAGE the capacitors are charged from VIN in series and are discharged to VOUT in parallel. For G = 2×, the capacitors are charged from VIN in parallel and are discharged to VOUT in parallel. In certain fault modes, the switches are opened and the output is physically isolated from the input. Typical white LEDs require up to 4 V to drive them. Therefore, some form of boosting is required to cover the typical Li Ion battery voltage variation.
PAGE 13
Data Sheet ADP8866 low for more than 100 μs (maximum). When standby is exited, a soft start sequence is performed. Note that the gain selection criteria applies only to active current sources. If a current source has been deactivated through an I2C command (that is, only five LEDs are used for an application), the voltages on the deactivated current sources are ignored. Shutdown Mode Shutdown mode disables all circuitry, including the I2C receivers.
PAGE 14
ADP8866 Data Sheet 25 LED GROUPS 15 10 5 0 0 OUTPUT CURRENT SETTINGS 40 60 80 100 120 OUTPUT CURRENT CODE (0 TO 127) The current setting is determined by a 7-bit code programmed by the user into diode current control registers (Register 0x13 for the backlight and Register 0x23 to Register 0x2B for the independent sinks). The 7-bit resolution allows the user to set the backlight to one of 128 different levels between 0 mA and 25 mA.
PAGE 15
Data Sheet ADP8866 The fade profile is based on the transfer law selected (square, Cubic 10, or Cubic 11) and the delta between the actual current and the target current. Smaller changes in current reduce the fade time. For square law fades, the fade time is given by Fade Time = Fade Rate × (Code/127) (4) where the Fade Rate is shown in Table 6. In this mode, the backlight fades in when BL_EN and nSTBY in Register 0x01 are set high, and it fades out when BL_EN or nSTBY is set low.
PAGE 16
ADP8866 Data Sheet Program all fade-in and fade-out timers before enabling any of the LED current sinks. If ISCx is on during a blink cycle and SCx_EN in Register 0x1B is cleared, it turns off (or fades to off if fade-out is enabled). If ISCx is off during a blink cycle and SCx_EN is cleared, it stays off. • Additional off time selections: D6 to D9 off times that range from 0 sec to 12.5 sec in 100 ms increments (Register 0x1E to Register 0x21).
PAGE 17
Data Sheet ADP8866 SHORT-CIRCUIT PROTECTION (SCP) MODE The ADP8866 can protect against short circuits on the output (VOUT). Short-circuit protection (SCP) is activated at the point when VOUT < 55% of VIN. Note that this SCP sensing is disabled during startup and restart attempts (fault recovery). SCP sensing is reenabled 4 ms (typical) after activation. During a short-circuit fault, the device enters a low current consumption state and an interrupt flag is set.
PAGE 18
ADP8866 Data Sheet STANDBY 0 EXIT STANDBY 1 TSD FAULT DIE TEMP > TSD EXIT STANDBY 0 1 STARTUP: CHARGE VIN TO VOUT DIE TEMP < TSD – TSD(HYS) SCP FAULT 0 VOUT > VOUT(START) 1 0 EXIT STARTUP VOUT < VOUT(SC) 0 WAIT 100µs (TYP) 1 G=1 1 G = 1.
PAGE 19
Data Sheet ADP8866 INTERRUPTS BACKLIGHT OFF INTERRUPT There are four interrupt sources available on the ADP8866. The backlight off interrupt (BLOFF_INT) is set when the backlight completes a fade-out. This feature is useful to synchronize the backlight turn off with the LCD display driver. FADE-IN FADE-IN OFF-TO-MAX FADE-OUT MAX-TO-OFF MAX 09478-038 BL_EN = 1 BLOFF_INT SET BL_EN = 0 Figure 37.
PAGE 20
ADP8866 Data Sheet APPLICATIONS INFORMATION The ADP8866 allows the charge pump to operate efficiently with a minimum of external components. Specifically, the user must select an input capacitor (CIN), output capacitor (COUT), and two charge pump fly capacitors (C1 and C2). CIN should be 1 μF or greater. The value must be high enough to produce a stable input voltage signal at the minimum input voltage and maximum output load. A 1 μF capacitor for COUT is recommended.
PAGE 21
Data Sheet ADP8866 I2C PROGRAMMING AND DIGITAL CONTROL • All registers are read/write unless otherwise specified • Unused bits are read-as-zero. Table 8 through Table 103 provide register and bit descriptions. The reset value for all bits in the bit map tables is all 0s, except in Table 9 (see Table 9 for its unique reset value). Wherever the acronym N/A appears in the tables, it means not applicable.
PAGE 22
ADP8866 Data Sheet REGISTER DESCRIPTIONS Table 8.
PAGE 23
Data Sheet ADP8866 Manufacturer and Device ID (MFDVID)—Register 0x00 Multiple device revisions are tracked by the device ID field. This is a read-only register. Table 9. MFDVID Manufacturer and Device ID Bit Map Bit 7 Bit 6 0 Bit 5 Manufacture ID 1 Bit 4 0 Bit 3 1 Bit 2 0 Bit 1 Device ID 0 Bit 0 1 1 Mode Control Register (MDCR)—Register 0x01 Table 10. MDCR Bit Map Bit 7 Reserved Bit 6 INT_CFG Bit 5 NSTBY Bit 4 ALT_GSEL Bit 3 GDWN_DIS Bit 2 SIS_EN Bit 1 Reserved Bit 0 BL_EN Table 11.
PAGE 24
ADP8866 Data Sheet Interrupt Status Register (INT_STAT)—Register 0x02 Table 12. INT_STAT Bit Map Bit 7 Reserved Bit 6 ISCOFF_INT Bit 5 BLOFF_INT Bit 4 SHORT_INT Bit 3 TSD_INT Bit 2 OVP_INT Bit 1 Bit 0 Reserved Table 13. Bit Name N/A ISCOFF_INT Bit No. 7 6 BLOFF_INT 5 SHORT_INT 4 TSD_INT 3 OVP_INT 2 N/A [1:0] 1 Description 1 Reserved. Independent sink off. 1 = indicates that the controller has ramped all the independent sinks designated in Register 0x04 and Register 0x05 to off.
PAGE 25
Data Sheet ADP8866 Bit Name OVP_IEN Bit No. 2 N/A [1:0] Description Overvoltage interrupt enabled. When the OVP_INT status bit is set after an error condition, an interrupt is raised to the host if the OVP_IEN flag is enabled. 1 = the overvoltage interrupt is enabled. 0 = the overvoltage interrupt is disabled (OVP_INT flag is still asserted). Reserved. Independent Sink Interrupt Selection 1 (ISCOFF_SEL1)—Register 0x04 Table 16.
PAGE 26
ADP8866 Data Sheet Bit Name D2OFFINT Bit No. 1 D1OFFINT 0 Description Include Diode 2 in the ISCOFF_INT flag. 1 = Diode 2 is in the group that triggers an ISCOFF_INT. When Diode 2 and all other LEDs with DxOFFINT are set high and goes from on to off, ISCOFF_INT is set. 0 = Diode 2 is not in the group that triggers an ISCOFF_INT when all diodes in that group are off. Include Diode 1 in the ISCOFF_INT flag. 1 = Diode 1 is in the group that triggers an ISCOFF_INT.
PAGE 27
Data Sheet ADP8866 Table 24. Code 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 N 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 Maximum Current Range (mA) 31.3 27.8 25.0 22.7 20.8 19.2 17.9 16.7 15.6 14.7 13.9 13.2 12.5 11.9 11.4 10.9 10.4 10.0 9.62 9.
PAGE 28
ADP8866 Data Sheet Bit Name D5LVL Bit No. 4 D4LVL 3 D3LVL 2 D2LVL 1 D1LVL 0 Description Diode 5 level select. 1 = control with the LEVEL_SET bits. 0 = normal mode (25 mA full-scale current). Diode 4 level select. 1 = control with the LEVEL_SET bits. 0 = normal mode (25 mA full-scale current). Diode 3 level select. 1 = control with the LEVEL_SET bits. 0 = normal mode (25 mA full-scale current). Diode 2 level select. 1 = control with the LEVEL_SET bits. 0 = normal mode (25 mA full-scale current).
PAGE 29
Data Sheet ADP8866 Bit Name D3PWR Bit No. 2 D2PWR 1 D1PWR 0 Description Diode 3 LED power source select. 1 = the LED is powered from the battery or other power source. 0 = the LED is powered from the charge pump. Diode 2 LED power source select. 1 = the LED is powered from the battery or other power source. 0 = the LED is powered from the charge pump. Diode 1 LED power source select. 1 = the LED is powered from the battery or other power source. 0 = the LED is powered from the charge pump.
PAGE 30
ADP8866 Data Sheet Bit Name D5SEL Bit No. 4 D4SEL 3 D3SEL 2 D2SEL 1 D1SEL 0 Description Diode 5 backlight select. 1 = selects LED5 as part of the independent sinks group. 0 = selects LED5 as part of the backlight group. Diode 4 backlight select. 1 = selects LED4 as part of the independent sinks group. 0 = selects LED4 as part of the backlight group. Diode 3 backlight select. 1 = selects LED3 as part of the independent sinks group. 0 = selects LED3 as part of the backlight group.
PAGE 31
Data Sheet ADP8866 Backlight Maximum Current Register (BLMX)—Register 0x13 Table 37. BLMX Bit Map Bit 7 Reserved Bit 6 Bit 5 Bit 4 Bit 3 BL_MC Bit 2 Bit 1 Bit 0 Table 38. Bit Name N/A BL_MC Bit No. 7 [6:0] Description Reserved. Backlight maximum current. The backlight maximum current can be set according to the square law function. All values scale with the setting of LEVEL_SET. See Table 39 for a complete list of values.
PAGE 32
ADP8866 DAC Code 0x1D 0x1E 0x1F 0x20 0x21 0x22 0x23 0x24 0x25 0x26 0x27 0x28 0x29 0x2A 0x2B 0x2C 0x2D 0x2E 0x2F 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37 0x38 0x39 0x3A 0x3B 0x3C 0x3D 0x3E 0x3F 0x40 0x41 0x42 0x43 0x44 0x45 0x46 0x47 0x48 0x49 0x4A 0x4B 0x4C 0x4D 0x4E 0x4F Data Sheet Current (mA) (Full Scale = 25 mA) LEVEL_SET = 000010 1.30 1.40 1.49 1.59 1.69 1.79 1.90 2.01 2.12 2.24 2.36 2.48 2.61 2.73 2.87 3.00 3.14 3.28 3.42 3.57 3.72 3.88 4.03 4.19 4.35 4.52 4.69 4.86 5.04 5.21 5.40 5.58 5.77 5.96 6.
PAGE 33
Data Sheet DAC Code 0x50 0x51 0x52 0x53 0x54 0x55 0x56 0x57 0x58 0x59 0x5A 0x5B 0x5C 0x5D 0x5E 0x5F 0x60 0x61 0x62 0x63 0x64 0x65 0x66 0x67 0x68 0x69 0x6A 0x6B 0x6C 0x6D 0x6E 0x6F 0x70 0x71 0x72 0x73 0x74 0x75 0x76 0x77 0x78 0x79 0x7A 0x7B 0x7C 0x7D 0x7E 0x7F Current (mA) (Full Scale = 25 mA) LEVEL_SET = 000010 9.92 10.2 10.4 10.7 10.9 11.2 11.5 11.7 12.0 12.3 12.6 12.8 13.1 13.4 13.7 14.0 14.3 14.6 14.9 15.2 15.5 15.8 16.1 16.4 16.8 17.1 17.4 17.7 18.1 18.4 18.8 19.1 19.4 19.8 20.1 20.5 20.9 21.2 21.6 21.
PAGE 34
ADP8866 Data Sheet INDEPENDENT SINK REGISTER DESCRIPTIONS Independent Sink Current Control Register 1 (ISCC1)—Register 0x1A Table 40. ISCLAW Bit Map Bit 7 Bit 6 Bit 5 Reserved Bit 4 Bit 3 Bit 2 SC9_EN Bit 1 Bit 0 SC_LAW Table 41. Bit Name N/A SC9_EN Bit No. 7:3 2 SC_LAW 1:0 Description Reserved. This enable acts on LED9. 1 = SC9 is turned on. 0 = SC9 is turned off. SC fade transfer law. 00 = square law DAC, linear time steps. 01 = square law DAC, linear time steps.
PAGE 35
Data Sheet ADP8866 Independent Sink Current Time (ISCT1)—Register 0x1C Table 44. ISCT1 Bit Map Bit 7 Bit 6 Bit 5 SCON Bit 4 Bit 3 Bit 2 Bit 1 Reserved Bit 0 SC5OFF Table 45. Bit Name SCON Bit No. [7:4] Description SC on time. If the SCxOFF time is not disabled, then when the independent current sink is enabled (Register 0x1A and Register 0x1B), it remains on for the on time selected (per the following list) and then turns off. 0000 = 0.00 sec 1. 0001 = 0.05 sec. 0010 = 0.10 sec. 0011 = 0.
PAGE 36
ADP8866 Data Sheet Table 47. Designation SC4OFF Bit [7:6] SC3OFF [5:4] SC2OFF [3:2] SC1OFF [1:0] 1 Description 1 SC4 off time. When the SC off time is disabled, the SC 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. 00 = off time disabled. 01 = 0.6 sec. 10 = 1.2 sec. 11 = 1.8 sec. SC3 off time.
PAGE 37
Data Sheet ADP8866 Independent Sink 7 Off Timer (OFFTIMER7)—Register 0x1F Table 50. OFFTIMER7 Bit Map Bit 7 Reserved Bit 6 Bit 5 Bit 4 Bit 3 SC7OFF Bit 2 Bit 1 Bit 0 Table 51. Bit Name N/A SC7OFF Bit No. 7 [6:0] Description Reserved. SC7 off time. When the SC off time is disabled, the SC 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. 0000 = disabled 1.
PAGE 38
ADP8866 Data Sheet Independent Sink 9 Off Timer (OFFTIMER9)—Register 0x21 Table 54. OFFTIMER9 Bit Map Bit 7 Reserved Bit 6 Bit 5 Bit 4 Bit 3 SC9OFF Bit 2 Bit 1 Bit 0 Table 55. Bit Name N/A SC9OFF 1 2 3 Bit No. 7 [6:0] Description Reserved. SC9 off time. When the SC off time is disabled, the SC 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.
PAGE 39
Data Sheet Bit Name SCFI Bit No. [3:0] ADP8866 Description Sink current fade-in time. Note that the fade time given is from zero to full scale (the actual full-scale value is affected by the LEVEL_SET bits). Binary code fade-out times are as follows: 0000 = disabled. 0001 = 0.05 sec. 0010 = 0.10 sec. 0011 = 0.15 sec. 0100 = 0.20 sec. … 1111 = 1.75 sec. Sink Current Register LED1(ISC1)—Register 0x23 Table 58. ISC1 Bit Map Bit 7 Reserved Bit 6 Bit 5 Bit 4 Bit 3 SCD1 Bit 2 Bit 1 Bit 0 Table 59.
PAGE 40
ADP8866 Data Sheet Sink Current Register LED3 (ISC3)—Register 0x25 Table 62. ISC3 Bit Map Bit 7 Reserved Bit 6 Bit 5 Bit 4 Bit 3 SCD3 Bit 2 Bit 1 Bit 0 Table 63. Bit Name N/A SCD3 Bit No. 7 [6:0] Description Reserved. Sink current. All values scale with the setting of LEVEL_SET. See Table 39 for a complete list of values. Current (mA) Current (mA) Current (mA) Current (mA) (Full Scale = (Full Scale = (Full Scale = (Full Scale = 25 mA) 12.5 mA) 8.25 mA) 6.
PAGE 41
Data Sheet ADP8866 Table 67. Bit Name N/A SCD5 Bit No. 7 [6:0] Description Reserved. Sink current. All values scale with the setting of LEVEL_SET. See Table 39 for a complete list of values. DAC Code 0x00 0x01 0x02 0x03 … 0x7F Current (mA) (Full Scale = 25 mA) LEVEL_SET = 000010 0.0 0.0016 0.0062 0.014 … 25.0 Current (mA) (Full Scale = 12.5 mA) LEVEL_SET = 001100 0.0 0.0008 0.0031 0.0070 … 12.5 Current (mA) (Full Scale = 8.25 mA) LEVEL_SET = 010110 0.0 0.0005 0.0021 0.0047 … 8.
PAGE 42
ADP8866 Data Sheet Table 71. Bit Name N/A SCD7 Bit No. 7 [6:0] Description Reserved. Sink current. All values scale with the setting of LEVEL_SET. See Table 39 for a complete list of values. Current (mA) Current (mA) Current (mA) Current (mA) (Full Scale = (Full Scale = (Full Scale = (Full Scale = 25 mA) 12.5 mA) 8.25 mA) 6.25 mA) DAC Code LEVEL_SET = 000010 LEVEL_SET = 001100 LEVEL_SET = 010110 LEVEL_SET = 100000 0x00 0.0 0.0 0.0 0.0 0x01 0.0016 0.0008 0.0005 0.0004 0x02 0.0062 0.0031 0.0021 0.
PAGE 43
Data Sheet ADP8866 Heartbeat Enable Selection (HB_SEL)—Register 0x2C Table 76. HB_SEL Bit Map Bit 7 Bit 6 Bit 5 Reserved Bit 4 Bit 3 D9HB_EN Bit 2 D8HB_EN Bit 1 D7HB_EN Bit 0 D6HB_EN Table 77. Bit Name N/A D9HB_EN Bit No. [7:4] 3 D8HB_EN 2 D7HB_EN 1 D6HB_EN 0 Description Reserved. Diode 9 heartbeat enable. 1 = heartbeat for this channel is enabled (all HB registers apply to every even numbered pulse). 0 = heartbeat for this channel is disabled (all HB registers are ignored).
PAGE 44
ADP8866 Data Sheet Table 81. Bit Name N/A SCD7_HB Bit No. 7 [6:0] Description Reserved. Sink current for the even numbered pulses when heartbeat mode for this channel is enabled. Use the following DAC code schedule. See Table 39 for a complete list of values. Current (mA) Current (mA) Current (mA) Current (mA) Current (mA) (Full Scale = (Full Scale = (Full Scale = (Full Scale = (Full Scale = 25 mA) 12.5 mA) 8.25 mA) 6.25 mA) 5.
PAGE 45
Data Sheet ADP8866 Table 85. Bit Name N/A SCD9_HB Bit No. 7 [6:0] Description Reserved. Sink current for the even numbered pulses when heartbeat mode for this channel is enabled. Use the following DAC code schedule. See Table 39 for a complete list of values. Current (mA) Current (mA) Current (mA) Current (mA) (Full Scale = Current (mA) (Full Scale = (Full Scale = (Full Scale = 5.0 mA) (Full Scale = 25 mA) 12.5 mA) 8.25 mA) 6.
PAGE 46
ADP8866 Data Sheet Table 89. Bit Name N/A SC7OFF_HB 1 2 3 Bit No. 7 [6:0] Description Reserved. SC7 off time for the even numbered pulses when heartbeat mode for this channel is enabled. When the SC7OFF_HB time is disabled, SC7 goes immediately from the even numbered on time to the odd numbered on time. 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 SCON7_HB setting. 0000 = disabled 1. 0000001 = 0.
PAGE 47
Data Sheet ADP8866 Table 93. Bit Name N/A SC9OFF_HB 1 2 3 Bit No. 7 [6:0] Description Reserved. SC9 off time for the even numbered pulses when heartbeat mode for this channel is enabled. When the SC9OFF_HB time is disabled, SC9 goes immediately from the even numbered on time to the odd numbered on time. 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 SCON9_HB setting. 0000 = disabled 1. 0000001 = 0.
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ADP8866 Data Sheet Table 97. Bit Name N/A DELAY6 Bit No. 7 [6:0] Description Reserved. Enable delay time for SC6. When SC6 is enabled, the ADP8866 automatically waits the specified time before starting the SC6 fade-in. 0000 = 0 ms (no delay when SC6 enable is exercised). 0000001 = 10 ms. 0000010 = 20 ms. 0000011 = 30 ms. … 1111111 = 1270 ms. Enable Delay Time for SC7 (DELAY7)—Register 0x3D Table 98. DELAY7 Bit Map Bit 7 Reserved Bit 6 Bit 5 Bit 4 Bit 3 DELAY7 Bit 2 Bit 1 Bit 0 Table 99.
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Data Sheet ADP8866 Table 103. Bit Name N/A DELAY9 Bit No. 7 [6:0] Description Reserved. Enable delay time for SC9. When SC9 is enabled, the ADP8866 automatically waits the specified time before starting the SC9 fade-in. 0000 = 0 ms (no delay when SC9 enable is exercised). 0000001 = 10 ms. 0000010 = 20 ms. 0000011 = 30 ms. … 1111111 = 1270 ms. Rev.
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ADP8866 Data Sheet OUTLINE DIMENSIONS PIN 1 INDICATOR 4.10 4.00 SQ 3.90 0.30 0.25 0.20 0.50 BSC 20 16 15 PIN 1 INDICATOR 1 EXPOSED PAD 2.65 2.50 SQ 2.35 5 11 0.80 0.75 0.70 0.50 0.40 0.30 10 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.20 REF SEATING PLANE 6 0.25 MIN BOTTOM VIEW FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. 061609-B TOP VIEW COMPLIANT TO JEDEC STANDARDS MO-220-WGGD.
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Data Sheet ADP8866 NOTES Rev.
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ADP8866 Data Sheet NOTES I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ©2011–2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09478-0-1/14(A) Rev.