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18 MULTI-FUNCTION LED DRIVER WITH I2C INTERFACE
Features
⚫
18-channel RGB LED Driver
➢
Global 256-levels DC current configuration
➢
Individual 4096-levels PWM for dimming
➢
Individual 256-levels current for color-
mixing
➢
Dither function
⚫
High-precision current sinks
➢
Device-to-device error: ±5%
➢
Channel-to-channel error: ±5%
⚫
EMI and audible noise reduction
➢
Phase delay and phase inverting scheme
➢
Slew rate control function
⚫
Flexible LED lighting pattern control
⚫
LED open/short detection per channel
⚫
Auto power save mode when all LEDs off >
32ms
⚫
Under voltage lock out and over temperature
protection
⚫
2
1MHz I
C interface, 4 selectable addresses:
20h, 21h, 24h, 25h
⚫
Power supply: 2.7V~5.5V
⚫
QFN 4mmX4mmX0.85mm-32L package
Applications
Cell Phone
Keyboard
PDA/MP3/MP4/CD/Mini display
Smart home appliance
www.awinic.com
General Description
AW21018 is an 18-channel multi-function LED
driver. Each channel has individual 8-bit DC current
setting for color-mixing and maximum 12-bit PWM
resolution for brightness control. The global current
of each channel is recommended to be 40mA
configured via register and external resistor R
Group control mode, autonomous breathing pattern
and rapid RGB control mode are provided for
flexible, high efficiency lighting effect programming
and fast display updating.
Programmable phase-shifting and spread spectrum
technology are utilized to reduce EMI and audible
noise caused by MLCC when LEDs turn on or off
simultaneously.
AW21018 can be turned off with minimum current
consumption by pulling the EN pin low.
AW21018 is available in QFN 4mmX4mmX
0.85mm-32L package. It operates from 2.7V to 5.5V
over the temperature range of -40°C to +85°C.
Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD
1
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AW21018
Feb. 2022 V1.1
.
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Table of Contents
Summary of Contents for AWINIC AW21018
- Page 1 LED open/short detection per channel simultaneously. ⚫ Auto power save mode when all LEDs off > AW21018 can be turned off with minimum current 32ms consumption by pulling the EN pin low. ⚫ Under voltage lock out and over temperature...
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Page 2: Typical Application Circuit
Figure 1 AW21018 Application Circuit Pin Configuration And Top Mark AW21018QNR Marking AW21018QNR (Top View) (Top View) RNAL – AW21018QNR XXXX – Production Tracing Code Figure 2 Pin Configuration and Top Marking www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 3: Pin Definition
C interface. Serial clock input for I C interface. Shutdown the chip when pulled low. ISET When R =4.0kΩ, global current of LED is 40mA. Not connected Ground www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 4: Functional Block Diagram
AW21018 Feb. 2022 V1.1 Functional Block Diagram Open/Short Detect UVLO Phase Control LED1 Modulation Digital LED2 Control DRIVER LED18 Global Current Setting ISET Figure 3 Functional Block Diagram www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 5: Typical Application Circuits
Note: The resistor R are only thermal reduction. And they are determined by V , VF of LED, VHR of LEDx and I -VHR)/I Figure 5 AW21018 Application Circuit(RGB) www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... - Page 6 NOTE2: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Test method: MIL-STD-883J Method 3015.9 EIA/JESD22-C101F(CDM) www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
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Page 7: Electrical Characteristics
Input high level AD0,AD1 0.7*V Internal pull down Ω ENPD resistance C Interface Output low level SDA,I = 10 mA Input high level SCL, SDA Input low level SCL, SDA www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 8: I2C Interface Timing
0.26 μs STOP condition setup time SU:STO Time between start stop μs condition HIGH HD:STA SU:STO HD:DAT SU:DAT SU:STA Stop Start Start Stop Figure 6 I2C Interface Timing www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 9: Detailed Functional Description
OPERATION MODE AND RESET RESET Power On Reset Upon initial power-up, the AW21018 is reset by internal power-on-reset, and all registers are reset to default value, and the chip is shut down. Once the supply voltage V drops below the threshold voltage V (2.0V), the power-on-reset will reset the... -
Page 10: Operating Mode
C interface is accessible, and all registers can be configured now. Active mode The AW21018 enters into active mode when EN is high and the bit CHIPEN of the register GCR (address 20h) is ‘1’. Power save mode In active mode, when the bit APSE of the register GCR (address 20h) is set to “1”, the auto power-save function is enabled. -
Page 11: Feature Description
20h). Following table shows the relationship of PWM frequency, the CLKFRQ [2:0] and PWMRES[1:0]. To avoid the MLCC audible noise, it’s recommended to use the PWM frequency lower than 500Hz or higher than 20kHz. CLKFRQ[2:0] BR Resolution www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... - Page 12 9bit+3bit dither PWM Phase Control To reduce the peak load current and ceramic-capacitor audible ringing, AW21018 supports 6 PWM phase shifting (Phase1~Phase6) and phase-inverting scheme. When setting PDE in register PHCR (address 59h) to ‘1’, the phase shifting scheme is enabled, and each adjacent phase differs by 60 degrees，which meaning only 3 of 18 LEDs could switch on in the same time.
- Page 13 It should be noted that when performing open-short detection, the bits DCPWM [2:0] need to be set to “111”. GROUP CONTROL MODE AW21018 supports group control mode, in this mode, all selected LEDs are controlled by the group control registers (GSLR, GSLG, GSLB). The register GCFG select which LEDs are controlled by group control register.
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Page 14: Spread Spectrum
Note: GBR={GBRH,GBRL}. SPREAD SPECTRUM PWM is a troublesome for some application which is concerned about EMI. AW21018 has spread spectrum function to optimize the EMI performance. If bit SSE in register SSCR (address 5Fh) is set to ‘1’, spread spectrum function is enabled. By setting the bit SSR in register SSCR, four spread spectrum range ±... - Page 15 T0~T3, which is set by bits LB [1:0] in register PATT2 (address 84h). The end point of the loop can only be selected between the end of T3 and the end of T1, which is determined by bits LE [1:0] in register www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
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Page 16: Protection Features
If both bit UVDIS and bit UVPD of the register UVCR (address 60h) is set to ‘0’, UVLO protection function is enabled. Once the event of under voltage occurs, the bit CHIPEN of the register GCR (address 20h) will be www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... - Page 17 By default, control bits OTDIS and OTPD are all “0”, both OT monitor and OT protection are enable. LED Open/Short Detection AW21018 supports LED open/short detection. When bit OSDE[1:0] of the register OSDCR(address 5Ah) is set to “10” , short detection is enabled, and the detection results can be read out via the registers OSST0~2(5Bh~5Dh).
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Page 18: Data Validation
When SCL is high level, SDA level must be constant. SDA can be changed only when SCL is low level.Each SCL pulse corresponds to one bit data transaction. www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 19: Write Cycle
Slave chip sends acknowledge signal if the slave address is correct. Master sends control register address (8-bit). Slave sends acknowledge signal. Master sends data byte to write to the addressed register. www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 20: Read Cycle
…… Using Repeat start …… …… stop Read Data Device Address …… Separated Read/write …… transaction …… Device Address Read Data stop Figure 18 I2C Read Byte Cycle www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 21: Register Configuration
RESET RESET/ID PATCFG SWITCH RAMPE PATMD PATE PATGO PATIS PATST PATT0 PATT1 PATT2 RPT[11:8] PATT3 RPT[7:0] GBRH GBRH GBRL GBRL GSLR GSLR GSLG GSLG GSLB GSLB GCFG GSLDIS www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... - Page 22 Write 00h to update BR and SL registers SLxx: Scaling Register (Address 46h~57h) Symbol Description Default SLxx Scaling parameter for LED GCCR: Global Current Control Register (Address 58h) Symbol Description Default Global current control register www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
- Page 23 1: open/short detected OTCR: Over Temperature Control Register (Address 5Eh) Symbol Description Default Thermal roll off percentage of LED output current 00: 100% 01: 75% TROF 10: 50% 11: 25% www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
- Page 24 1: enable Spread spectrum range 00: ± 5% 01: ± 15% 10: ± 24% 11: ± 34% Spread spectrum period 00: 1980μs 01: 1200μs 10: 820μs 11: 660μs www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
- Page 25 01: Both BR and SL are updated at PWM carrier boundary. 10: BR is updated at fast mode, and SL does not need to be updated. 11: Both BR and SL are updated at fast mode. www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
- Page 26 Ramp for manual mode RAMP 0: direct set 1: ramp enable when transition PAT operation mode PATMD 0: manual mode 1: auto breath mode PAT Enable PATE 0: disable 1: enable www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
- Page 27 0010: 0.26s 0011: 0.38s 0100: 0.51s 0101: 0.77s 0110: 1.04s 0111: 1.60s 0000 1000: 2.10s 1001: 2.60s 1010: 3.10s 1011: 4.20s 1100: 5.20s 1101: 6.20s 1110: 7.30s 1111: 8.30s www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
- Page 28 When LEDx (x=2, 5, 8, …) works in group mode, its SL scaling GSLG is decided by GSLG. When LEDx (x=3, 6, 9, …) works in group mode, its SL scaling GSLB is decided by GSLB. www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
- Page 29 GE[2]=1: LED7~9 work in auto breath pattern mode GE[3]=1: LED10~12 work in auto breath pattern mode GE[4]=1: LED13~15 work in auto breath pattern mode GE[5]=1: LED16~18 work in auto breath pattern mode www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
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Page 30: Application Information
LED1~LED18 current I as described in below formula. Where K = 160V, the recommended minimum value of R is 2KΩ. When R = 4KΩ, I = 40mA www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... - Page 31 AW21018 Feb. 2022 V1.1 PCB Layout Consideration AW21018 is an 18-channel multi-function LED driver programmed via I C compatible interface. When all LEDs are operating, the device power dissipation is large. To obtain the good thermal performance and avoid thermal shutdown, PCB layout should be considered carefully.
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Page 32: Tape And Reel Information
Note：The above picture is for reference only. Please refer to the value in the table below for the actual size DIMENSIONS AND PIN1 ORIENTATION Pin1 Quadrant (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) 12.4 All dimensions are nominal www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... -
Page 33: Package Description
TOP VIEW 0.20 REF 0.85±0.05 0.00~0.05 SIDE VIEW 2.80 T YP 0.40 T YP SYMM 2.90±0.10 ℄ 32x(0.20±0.05) 0.30 REF 32x(0.30±0.05) SYMM ℄ 0.30 REF 2.90±0.10 BOTTOM VIEW Unit：mm www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... - Page 34 2.90 REF 0.05 MAX 0.05 MIN All AROUND All AROUND SOLDER MASK SOLDER MASK OPENING OPENING METAL METAL UNDER SOLDER MASK SOLDER MASK DEFINED NON SOLDER MASK DEFINED Unit：mm www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com...
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Page 35: Revision History
AW21018 Feb. 2022 V1.1 Revision History Version Date Change Record V1.0 Oct 2020 Officially released V1.1 Feb 2022 Modified EC table www.awinic.com Copyright © 2020 SHANGHAI AWINIC TECHNOLOGY CO., LTD Downloaded From Oneyac.com... - Page 36 Resale of AWINIC components or services with statements different from or beyond the parameters stated by AWINIC for that component or service voids all express and any implied warranties for the associated AWINIC component or service and is an unfair and deceptive business practice. AWINIC is not responsible or liable for any such statements.
- Page 37 单击下面可查看定价，库存，交付和生命周期等信息 >>AWINIC(艾为) Downloaded From Oneyac.com...
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