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12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 1Rev. A, 07/26/2016
DESCRIPTIONThe IS31FL3737 is a general purpose 12×12 LEDsmatrix driver with 1/12 cycle rate. The device can beprogrammed via an I2C compatible interface. EachLED can be dimmed individually with 8-bit PWM datawhich allowing 256 steps of linear dimming.IS31FL3737 features 3 Auto Breathing Modes whichare noted as ABM-1, ABM-2 and ABM-3. For each AutoBreathing Mode, there are 4 timing characters whichinclude current rising / holding / falling / off time and 3loop characters which include Loop-Beginning /Loop-Ending / Loop-Times. Every LED can beconfigured to be any Auto Breathing Mode or PWMmode individually.FEATURES Supply voltage range from 2.7V to 5.5V Programmable 12×12 (48 RGBs) matrix size with
de-ghost function 3 Auto Breath Modes and PWM Mode Auto breath offers 128 steps gamma current,
interrupt and state look up registers 256 steps global current setting Individual PWM control 256 steps Individual open and short error detect function QFN-40 (6mm×6mm) packageQUICK START
Figure 1: Photo of IS31FL3737 Evaluation Board
RECOMMENDED EQUIPMENT 5.0V, 2A power supply
ABSOLUTE MAXIMUM RATINGS ≤ 5.5V power supplyCaution: Do not exceed the conditions listed above, otherwisethe board will be damaged.
PROCEDUREThe IS31FL3733 evaluation board is fully assembledand tested. Follow the steps listed below to verifyboard operation.Caution: Do not turn on the power supply until all connectionsare completed.1) Short J3 to connect 3VO and VIO.2) Short J4 to connect PVCC and U1VCC.3) Connect the 5VDC power to the connector
(J1&J2).4) Turn on the power supply/Plug in the Micro USB
Pay attention to the supply current. If the currentexceeds 1A, please check for circuit fault.
ORDERING INFORMATIONPart No. Temperature Range PackageIS31FL3737-QFLS4-EB -40°C to +125°C (Industrial) QFN-40, Lead-free
Table 1: Ordering Information
For pricing, delivery, and ordering information, please contacts ISSI’s analog marketing team atanalog@issi.com or (408) 969-6600.
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 2Rev. A, 07/26/2016
EVALUATION BOARD OPERATIONThe IS31FL3737 evaluation board has threeanimation display modes. Press K1 to switchconfigurations.1) Line- rotate animation2) Money animation3) Butterfly animation4) All led turn onNote: IS31FL3737 solely controls the FxLED function on theevaluation board.
SOFTWARE CONTROLJ4 default setting is closed (short). If it is set to open,the U1 (LDO) will stop working and all the 3V, includingthe supply of MCU will be cut off, all the MCU's IO willbe high impedance (open-drain) and external control isallowed.The IS31FL3737 can set its I2C bus interface logicthreshold based on the voltage on the VIO pin. Anexternal VIO voltage in the range of 1.8V≤VIO≤VCCcan be applied after removing (open) the J4 jumper.
The board comes with J4 default setting closed(short). If it is set to open, the user can connect anexternal VIO voltage supply, the external VIO voltageis recommended to equal to ex-IIC’s high logic.Follow the steps listed below for external control.1) Open J4 to disconnect the power of U1, disable
the 3V0 (3.0V).2) Open J3 to disconnect the VIO to 3V0, and
connect an external MCU VCC to VIO.3) Pull-up the SDB to VIO.4) Connect the 5VDC power to the connector
(J1&J2).5) Turn on the power supply/Plug in the Micro USB
Pay attention to the supply current. If the currentexceeds 1A, please check for circuit fault.
6) Start external IIC control.Caution: If J4 is closed (shorted), user can’t connect the user’sMCU VCC to VIO directly, otherwise the user’s MCU (maybe 1.8V)will connect to evaluation bard’s VIO (3.0V) and maybedamaged.Please refer to the datasheet to get more information aboutIS31FL3737.
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 3Rev. A, 07/26/2016
VBAT1PC13-ANTI_TAMP2PC14-OSC32_IN3PC15-OSC32_OUT4OSC_IN5OSC_OUT6NRST7VSSA8VDDA9PA0-WKUP/ADC_IN0/TIM2_CH1_ETR10PA1/ADC_IN1/TIM2_CH211PA2/USART2_TX/ADC_IN2/TIM2_CH312PA3/USART2_RX/ADC_IN3/TIM2_CH413PA4/SPI1_NSS/ADC_IN414PA5/SPI1_SCK/ADC_IN515PA6/SPI1_MISO/ADC_IN6/TIM3_CH116PA7/SPI1_MOSI/ADC_IN7/TIM3_CH217PB0/ADC_IN8/TIM3_CH318PB1/ADC_IN9/TIM3_CH419PB2/BOOT120PB10/I2C2_SCL/USART3_TX21PB11/I2C2_SDA/USART3_RX22VSS_123VDD_124 PB12/SPI2_NSS/TIM1_BKIN 25PB13/SPI2_SCK/TIM1_CH1N 26PB14/SPI2_MISO/TIM1_CH2N 27PB15/SPI2_MOSI/TIM1_CH3N 28PA8/TIM1_CH1/MCO 29PA9/USART1_TX/TIM1_CH2 30PA10/USART1_RX/TIM1_CH3 31PA11/CANRX/USBDM/TIM1_CH4 32PA12/CANTX/USBDP/TIM1_ETR 33PA13/JTMS/SWDIO 34VSS_2 35VDD_2 36PA14/JTCK/SWCLK 37PA15/JTDI 38PB3/JTDO 39PB4/JNTRST 40PB5 41PB6/I2C1_SCL/TIM4_CH1 42PB7/I2C1_SDA/TIM4_CH2 43BOOT0 44PB8/TIM4_CH3 45PB9/TIM4_CH4 46VSS_3 47VDD_3 48U2
STM32F103C8T6
OSC_INOSC_OUTGND
3V
M-SDAM-SCL
M-INTB
USB_DMUSB_DPDIOGND3V
GND
Y18M
33P
C633P
C5
OSC_IN
OSC_OUT
10nF
C2
VDD1
GND2SD3
BP 4
VOUT 5U1
LDO
1uFC1
3V
CLK
+5V
GND
GND
1uFC3
3V
3V
+5V
0.1uFC10
0.1uFC13
MCU
3V Power
100KR9 27KR5
OSC
VIO
LED Array
Micro USB
12345CON4
1KR12
1KR6
100KR8
VIO
M-SDA
M-SCL
M-INTB
M-SDA
M-SCL
M-INTB
10uFC4
22RR4
22RR2
USB_DM
USB_DP
1.5KR33.3V
USB_DMUSB_DP
k1
GND
1uFC5
GND
0.1uFC11
D1
DFLS240
NC
D2
DFLS240
10KR1
100KR7100KR11
1234567891011121314151617181920
CON3
12
J1 12
J2
12J3
Header 2H12
J4
Header 2H
GND PVCC
VIO
U1 VCC
U1 VCC
LD177 LD178 LD179 LD180 LD181 LD182 LD183 LD184
LD161 LD162 LD163 LD164 LD165 LD166 LD167 LD168
LD145 LD146 LD147 LD148 LD149 LD150 LD151 LD152
LD129 LD130 LD131 LD132 LD133 LD134 LD135 LD136
LD113 LD114 LD115 LD116 LD117 LD118 LD119 LD120
LD97 LD98 LD99 LD100 LD101 LD102 LD103 LD104
LD81 LD82 LD83 LD84 LD85 LD86 LD87 LD88
LD65 LD66 LD67 LD68 LD69 LD70 LD71 LD72
LD49 LD50 LD51 LD52 LD53 LD54 LD55 LD56
LD33 LD34 LD35 LD36 LD37 LD38 LD39 LD40
LD17 LD18 LD19 LD20 LD21 LD22 LD23 LD24
LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8
LD185 LD186 LD187 LD188
LD169 LD170 LD171 LD172
LD153 LD154 LD155 LD156
LD137 LD138 LD139 LD140
LD121 LD122 LD123 LD124
LD105 LD106 LD107 LD108
LD89 LD90 LD91 LD92
LD73 LD74 LD75 LD76
LD57 LD58 LD59 LD60
LD41 LD42 LD43 LD44
LD25 LD26 LD27 LD28
LD9 LD10 LD11 LD12
GNDGNDCLKDIO3.3VIICRSSYNCINTBSDASCLAD1AD1GNDSCLSDAPVCCVIOSDBGNDGND
PVCC3V
NCR10
3V
0.1uFC12
SDB
GND
VCC
10uFC7
62KR13
39KR14
3V
CS1
CS2
CS3
CS4
CS5
CS6
CS7
CS8
CS9
CS10
CS11
CS12
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
SW10
SW11
SW12
SDA_RGBSCL_RGBSDB_RGBINTB
1SW11SW21SW31SW41SW51SW61SW71SW81SW91SW101SW111SW12
1CS11CS21CS31CS41CS51CS61CS71CS81CS91CS101CS111CS12
SW1 1SW2 2SW3 3
PGND4
SW4 5SW5 6SW6 7SW7 8SW8 9SW9 10
PGND11
SW10 12SW11 13SW12 14
CS1 15CS2 16CS3 17CS4 18
PVCC19
CS5 20CS6 21CS9 22
CS10 23CS11 24CS12 25CS13 27CS14 28
PVCC26
AGND29
REST30
AVCC31VIO32
SYNC33
SDA34 SCL35
ADDR136
INTB37 SDB38
IICRS39
GND40
U3
IS3737
GND
VCC
VCC
VCC
VIO
SYNC
GND
VIO
FLASH
CE1SO2WP3GND4 SI 5
SCK 6HOLD 7
VCC 8U4
IS25LQ032C
SPI_MOSI
SPI_MISOVCC
SPI_CS
GND
VCCVCCSPI_CLK
SPI_CSSPI_CLKSPI_MISOSPI_MOSI
VCC
0.1uFC8
0.1uFC9
GND
GND
Figure 2: IS31FL3733 Application Schematic
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 4Rev. A, 07/26/2016
BILL OF MATERIALSName Symbol Description Qty Supplier Part No.LDO U1 Reduced voltage 1 SGMICRO SGM2019-3.3VMCU U2 Microcontroller 1 STM STM32F103C8T6
LED Driver U3 Matrix LED Driver 1 ISSI IS31FL3733Flash U4 Flash 1 ISSI IS25LQ032CDiode LD1~LD192 Blue LED, SMD 144 Everlight 9-217/BHC-ZL1M2RY/3TDiode D1,D2 Diode, SMD 2 DIODES DFLS240Crystal Y1 Crystal, 8MHz 1 JB HC-49SResistor R7,R8,
R9,R11RES,100k,1/16W,±5%,SMD 4 Yageo RC0603JR-07100KL
Resistor R2,R4 RES,22R,1/16W,±5%,SMD 2 Yageo RC0603JR-0722RLResistor R1 RES,10k,1/16W,±5%,SMD 1 Yageo RC0603JR-0710KLResistor R3 RES,1.5k,1/16W,±5%,SMD 1 Yageo RC0603JR-071K5LResistor R5 RES,27k,1/16W,±5%,SMD 1 Yageo RC0603JR-0727KLResistor R6,R12 RES,1k,1/16W,±5%,SMD 2 Yageo RC0603JR-0701KLResistor R13 RES,62k,1/16W,±5%,SMD 1 Yageo RC0603JR-0762KLResistor R14 RES,39k,1/16W,±5%,SMD 1 Yageo RC0603JR-0739KLResistor R10 NC 1 YageoCapacitor C1,C3,C5 CAP,1µF,16V,±20%,SMD 3 Yageo CC0603KKX7R9BB105Capacitor C2 CAP,10nF,16V,±20%,SMD 1 Yageo CC0603KKX7R9BB100Capacitor C4,C7 CAP,10uF,16V, ±20%,SMD 2 Yageo CC0603KKX7R9BB106Capacitor C6,C5 CAP,33pF,16V,±20%,SMD 2 Yageo CC0603KKX7R9BB330Capacitor C8,C9,C10,C
11,C12,C13 CAP,0.1µF,16V,±20%,SMD 6 Yageo CC0603KKX7R9BB104Button K1 Button SMD 1
Bill of Materials, refer to Figure 2 above.
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 5Rev. A, 07/26/2016
Figure 3: Board Component Placement Guide - Top Layer
Figure 4: Board PCB Layout - Top Layer
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 6Rev. A, 07/26/2016
Figure 5: Board Component Placement Guide - Bottom Layer
Figure 6: Board PCB Layout - Bottom Layer
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 7Rev. A, 07/26/2016
Figure 7: LED Board Component Placement Guide - Top Layer
Figure 8: LED Board PCB Layout - Top Layer
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 8Rev. A, 07/26/2016
Figure 9: LED Board Component Placement Guide - Bottom Layer
Figure 10: LED Board PCB Layout - Bottom Layer
Copyright © 2016 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at anytime without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers areadvised to obtain the latest version of this device specification before relying on any published information and before placing orders for products.Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of theproduct can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are notauthorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that:a.) the risk of injury or damage has been minimized;b.) the user assume all such risks; andc.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
12x12 MATRIX LED DRIVER
Integrated Silicon Solution, Inc. – www.issi.com 9Rev. A, 07/26/2016
REVISION HISTORY
Revision Detail Information DateA Initial release 2016.07.26
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