AW9364 January 2018 V2.2 4-Channel 1-wire Dimming LED Driver with Ultra Low Dropout Current Source FEATURES DESCRITION The AW9364 is a 4-channel ultra low dropout constantsource parallel LED driver. With the proprietary Q-MirrorTM technique, the AW9364 uses an internal resistor to set the bias current for four LEDs, which are matched to 1%. The AW9364 incorporates a single wire interface to program the output current at 16 continuous steps. The AW9364 has an internal deglitch circuit for filtering the noise of the EN input. The AW9364 requires only a 40mV dropout voltage at a 20mA load. The feature makes AW9364 ideal for battery-operated systems, such as personal digital assistants. Ultra low dropout: 50mV/20mA(typical) Support up to 4 LEDs LED sink current up to 20mA 1% LED current matching(typical) En Pin Deglitch circuit Thermal shutdown protection 16-step brightness control ESD protection: 8kV(HBM) No EMI and switch noise Packages: DFN2x2-8L The AW9364 is available in DFN2x2-8L packages and is specified over the -40 to +85 temperature range. APPLICATIONS Mobile phone Digital camera PDA MP3 PIN CONFIGURATION AND MARKING AW9364DNR TOP VIEW DFN2x2-8L PGND 1 8 LED1 EN 2 7 LED2 VIN 3 6 LED3 AGND 4 5 AW9364DNR MARKING DFN2x2-8L AL64 XY LED4 AL64 - AW9364DNR XY - Manufacture Date Code Figure 1 Pin Configuration of AW9364 www.awinic.com.cn 1 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 TYPICAL APPLICATION CIRCUITS 2.8V to 5.5V VIN 1uF PGND AW9364 LED1 Pulse Input LED2 EN LED3 n16 2 1 LED4 AGND Figure 2 AW9364 Typical Application 2.8V to 5.5V VIN 1uF PGND AW9364 LED1 Pulse Input LED2 EN LED3 1 2 n16 LED4 Floating AGND Figure 3 3-LED Application www.awinic.com.cn 2 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 2.8V to 5.5V VIN 1uF PGND AW9364 LED1 Pulse Input 1 2 LED2 EN n16 LED3 Floating LED4 Floating AGND Figure 4 2-LED Application 2.8V to 5.5V VIN 1uF PGND AW9364 LED1 Pulse Input 1 2 EN n16 LED2 Floating LED3 Floating LED4 Floating AGND Figure 5 1-LED Application www.awinic.com.cn 3 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 ORDERING INFORMATION Order Number Temperature Range Package Marking Moisture sensitivity level Environmental Information Packing Type AW9364DNR -4085 DFN2x2-8L AL64 MSL3 RoHS+HF 3000 units/Tape and Reel AW9364 Shipping Package Type Package Type Shipping DN:DFN2x2-8L R :Tape & Reel ABSOLUTE MAXIMUM RATINGS(1) Parameter Range Supply Voltage VDD -0.3V to 6 V Input Voltage EN -0.3V to 6 V Power Dissipation, ( PD@ TA=25 0.44 W Maximum Junction Temperature 125 Storage Temperature Range -65 to 150 Lead Temperature (Soldering 10 Seconds) 260 Package Thermal Resistance JA 76/W ESD Rating (2) Human Body Model 8000 V Latch-up current maximum rating per JEDEC standard +IT:450mA -IT:-450mA Latch-up(3) www.awinic.com.cn 4 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 ELECTRICAL CHARACTERISTICS Test Condition: TA=25, VIN=3.6V, CIN = 1F (unless otherwise specified) Parameter Symbol Supply Voltage VIN Output Current ILED Current Matching LED Dropout Voltage VDO Condition Min Typ. 2.8 All LEDs 100% setting 16.5 All LEDs 100% setting -5 20 ILED=20mA 50 Quiescent Current IQ ILED=0 330 Shutdown Current ISD VEN=0VVIN=5.5V 0.1 Startup Time TON Enable High Level Input Voltage VIH Enable Low Level Input Voltage VIL EN Low Time for Dimming TLO 0.5 EN High Time for Dimming THI 0.5 Shutdown Delay Time Thermal Shutdown Temperature TOFF Max Units 5.5 V 23.5 mA 5 % 170 mV A 1 s 20 1.5 VEN=0V TP Hysteresis Temperature A V 0.3 V 500 s s 800 2500 s 145 20 NOTE1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE2: The human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin. NOTE3: Test condition: JEDEC STANDARD NO.78A FEBRUARY 2006. www.awinic.com.cn 5 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 PIN DEFINITION PIN Symbol 4 AGND Analog Ground 1 PGND Power Ground 3 VIN Supply Input 2 EN Enable Pin. Active high, with an internal 150k pull-down resistor. 5 LED4 LED4 Pin, Connect to the LED cathode, leave it to connect GND or open if unused. 6 LED3 LED3 Pin, Connect to the LED cathode, leave it to connect GND or open if unused. 7 LED2 LED2 Pin, Connect to the LED cathode, leave it to connect GND or open if unused. 8 LED1 LED1 Pin, Connect to the LED cathode, leave it to connect GND or open if unused. 9 GND Exposed pad, should be connected to gnd. www.awinic.com.cn Description 6 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 TYPICAL OPERATION CHARACTERISTICS Test conditionTA=25VIN=3.6V, CIN=1F unless otherwise specified. Efficiency vs Supply Voltage LED Current vs Supply Voltage 90 22 80 20 70 18 LED Current (mA) 24 Efficiency (%) 100 60 50 40 30 20 16 14 12 10 8 6 LED VF=3.15V/20mA 10 LED VF=3.15V/20mA 4 0 3.2 3.4 3.6 3.8 4.0 Supply Voltage (V) 4.2 3.2 4.4 LED Current vs Temperature 3.4 3.8 3.6 Supply Voltage (V) 4.0 LED Current vs LED Dropout Voltage 24 25 20 22 LED Current (mA) LED Current (mA) 23 21 20 19 18 15 10 5 17 16 -40 -25 -10 5 20 35 50 Temperature () 65 80 0 95 Shutdown Time vs Supply Voltage 0.6 0.2 0.4 0.8 LED Dropout Voltage(V) 1.2 Line Transient Response Shutdown Time (uS) 900 800 700 EN 600 500 400 300 Current 200 100 2.8 3.0 3.2 3.4 3.6 3.8 Supply Voltage (V) www.awinic.com.cn 4.2 4.4 Time (100us/Div) 7 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 BLOCK DIAGRAM VIN LED1 LED2 LED3 LED4 Bandgap Q-Mirror OTP Current Source EN DAC Deglitch PGND AGND Figure 6 Functional Block Diagram of AW9364 20us<TON EN 1 16/16 0.5us<THI 0.5us<TLO <500us 2 15/16 3 14/16 5 4 2.5ms<TSHDN 6 15 16 1 16/16 13/16 12/16 3/16 ILED 2/16 1/16 Figure 7 16-steps brightness control of AW9364 www.awinic.com.cn 8 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 DETAILED DESCRIPTION The AW9364 is a high efficiency, no noise LED driver which powering up to 4-channel LED's at 20mA. Figure 2 shows a typical application circuit for four LEDs. In order to maintain LED constant current, the input voltage must provide the required LED forward voltage and current source dropout voltage. The AW9364 requires only 40mV dropout voltage at a 20mA load on each output to match the LED brightness. Enable Input The EN input is used to enable or disable the AW9364. Pulling the EN pin higher than 1.5V will enable the device. For producing constant, non-pulsating output current compare to conventional pulse width modulation (PWM) dimming scheme, the AW9364 incorporates a 4-bit DAC for brightness control to program the output current at 16 continuous steps: 20~1.25mA. Table 1 shows detail for current setting. Table 1 Current Setting EN Rise Edge Number Current (mA) EN Rise Edge Number Current (mA) 1 20 9 10 2 18.75 10 8.75 3 17.5 11 7.5 4 16.25 12 6.25 5 15 13 5 6 13.75 14 3.75 7 12.5 15 2.5 8 11.25 16 1.25 The figure 7 shows the detail operation of 16-steps brightness control. When 1-wire pulse counting dimming is used, the ready time is recommended to be greater than 20s for enabling the device, the pulse high time THI recommended to be greater than 0.5s, and the pulse low time TLO is recommended to be greater than 0.5s and less than 500s. A constant current is sourced as long as the EN signal remains high. The shutdown feature reduces quiescent current to less than 0.1A. Deglitch Circuit The AW9364 has an internal deglitch circuit for filtering the noise of the EN input. For example, the EN pin is sometimes superimposed with noise, or a so-called glitch, and the glitch may be greater than the enable high level input voltage VIH. In such a case, the deglitch circuit is used as a filter circuit for removing the glitch. Over Thermal Protection The AW9364 has an internal over thermal protection circuit. The over temperature circuit will turn off the output current to decrease the power dissipation when the junction temperature exceeds 145 and will resume the output circuit when the junction temperature falls below 125 Efficiency The AW9364 offers superior efficiency performance. Due to the ultra low-dropout current sinks and direct connection to the supply, higher average efficiency and higher peak efficiency is obtained. The system efficiency, defined as the ratio between the LED's power and the input power can be calculated simply as the following: www.awinic.com.cn 9 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 Efficiency= (VF1xILED1+ VF2xILED2+ VF3xILED3+ VF4xILED4)/(VIN x IIN) VF is the LED forward voltage, VIN= VF+VDO, VDO is the dropout voltage needed in the current source. www.awinic.com.cn 10 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 PACKAGE DESCRIPTION D2 Unit:mm e b D E2 E DFN-8L Symbol Min Typ Max A 0.800 0.850 0.900 A1 0.000 A2 c D1 Top View Bottom View A A2 A1 Side View 0.050 0.203( Ref.) b 0.200 0.250 0.300 c 0.300 0.350 0.400 D 1.950 2.000 2.050 D2 1.150 1.200 1.250 D1 1.500 ( Ref.) e 0.500 (BSC) E 1.950 2.000 2.050 E2 0.550 0.600 0.650 LAND PATTERN DFN2X2-8L 0.700.05 2.550.05 0.600.05 1.150.05 (2 SIDES) PACKAGE OUTLINE 0.250.05 0.50 BSC 1.200.05 www.awinic.com.cn 11 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 REEL INFORMATION DFN2X2-8L www.awinic.com.cn 12 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 REVISION HISTORY Date Vision 2017-4-12 V1.7 2018-1-9 V2.2 www.awinic.com.cn Description 1. Refreshed documental format; 2. Updated some characteristics information. 13 Copyright (c) 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD AW9364 January 2018 V2.2 DISCLAIMER Information in this document is believed to be accurate and reliable. However, Shanghai AWINIC Technology Co., Ltd (AWINIC Technology) does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. AWINIC Technology reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. Customers shall obtain the latest relevant information before placing orders and shall verify that such information is current and complete. This document supersedes and replaces all information supplied prior to the publication hereof. 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