Ordering number : ENA2184B LV52204MT Bi-CMOS IC LED Boost Driver with PWM and 1-Wire Dimming http://onsemi.com Overview The LV52204MT is a high voltage boost driver for LED drive. LED current is set by the external resistor R1 and LED dimming can be done by changing FB voltage with PWM or 1-Wire. Features • Operating Voltage from 2.7V to 5.5V • 1-Wire 32 level digital and PWM dimming • Integrated 40V MOSFET • 600kHz Switching Frequency WDFN6 2x2, 0.65P Typical Applications • LED Display Backlight Control D1 L1 22μH VBAT C1 1μF C2 1μF SW SWIRE VIN PWM/ 1-WIRE GND FCAP FB LV52204 C3 220nF R1 10Ω ORDERING INFORMATION See detailed ordering and shipping information on page 16 of this data sheet. Semiconductor Components Industries, LLC, 2014 May, 2014 51914NK/O1613NK 20130917-S00002/52213NK No.A2184-1/16 LV52204MT Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max VCC 6.0 Maximum pin voltage1 V1 max SW 40 V V Maximum pin voltage2 V2 max Other pin 5.5 V Allowable power dissipation Pd max Ta = 25°C *1 2.05 W Operating temperature Topr -30 to +85 °C Storage temperature Tstg -55 to +125 °C *1 Mounted on a specified board: 70mm×50mm×1.2mm (4 layer glass epoxy) Caution 1) Absolute maximum ratings represent the values which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details. Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Recommendation Operating Condition at Ta = 25°C Parameter Symbol Conditions Supply voltage range1 VCC op VCC PWM frequency Fpwm PWM MODE PWM minimum duty Fduty Ratings Unit 2.7 to 5.5 V 300 to 100k Hz 10kHz, VIN ≥3.3V, –30°C to 85°C *2 2 % 20kHz, VIN ≥3.3V, –30°C to 85°C *2 4 % 30kHz, VIN ≥3.3V, –30°C to 85°C *2 6 % *2 Guaranteed by design Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Electrical Characteristics Analog block at Ta = 25°C, VCC = 3.6V, unless otherwise specified Parameter Symbol Conditions Ratings min typ SHUTDOWN Unit max 0 5 μA 1 mA 0.2 0.21 V 1 μA 39 V Standby current dissipation ICC1 DC/DC current dissipation ICC2 VOUT = 30V, ILED = 20mA FB voltage Vfb PWM duty 100% FB pin leak current Ifb OVP voltage Vovp SWOUT ON resistance Ron IL = 100mA 700 NMOS switch current limit ILIM Vfb = 200mV 0.7 A OSC frequency Fosc 600 kHz High level input voltage VINH SWIRE 1.5 VCC Low level input voltage VINL SWIRE 0 0.4 Under voltage lockout Vuvlo VIN falling SWIRE output voltage Vack Rpullup = 15kΩ SW 0.19 37 38 mΩ 2.2 V V V 0.4 V for Acknowledge Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. No.A2184-2/16 LV52204MT Recommended SWIRE Timing at Ta = 25°C, VCC = 3.6V, unless otherwise specified Parameter Symbol SWIRE setup time1 Ton1 Ratings Conditions min PWM duty more than 2%, typ Unit max 2 μs 20 μs VIN ≥3.3V, –30°C to 85°C *3 from shutdown SWIRE setup time2 Ton2 from shutdown SWIRE mode selectable time Tsel 1 SWIRE delay time to start Tw0 100 2.2 ms μs Tw1 260 μs SWIRE low time to shutdown Toff 8.9 ms SWIRE start time for digital Tstart 2 μs Tend 2 digital mode detection SWIRE low time to switch to digital mode mode programming SWIRE end time for digital 360 μs mode programming SWIRE High time of bit 0 Th0 Bit detection = 0 2 180 μs SWIRE Low time of bit 0 Tl0 Bit detection = 0 Th0 × 2 360 μs μs SWIRE High time of bit 1 Th1 Bit detection = 1 Tl1 × 2 360 SWIRE Low time of bit1 Tl1 Bit detection = 1 2 180 DCDC startup delay Tdel Delay time of Acknowledge Tackd Duration of Acknowledge Tack 2 μs ms 2 μs 512 μs *3 Guaranteed by design Block Diagram VBAT 4 VCC 6 UVLO TSD PWM/ 1-Wire SWIRE FCAP SW OCP OVP 600kHz PWM Controler 1 FB 5 VREF CONTROL 2 VREF 3 GND No.A2184-3/16 LV52204MT Pin Connections 6 VIN FB 1 5 SWIRE/PWM FCAP 2 GND 3 4 SW Top view Pin Function PIN # Pin Name Description 1 FB Feedback pin. 2 FCAP Filtering capacitor terminal for PWM mode. 3 GND Ground 4 SW Switch pin. Drain of the internal power FET. 5 SWIRE 1-wire dimming control and PWM dimming input (active High). 6 VCC Supply voltage. Expose-pad Connect to GND on PCB. Allowable power dissipation, Pd max -- W 3.0 Pd max -- Ta Mounted on a specified board: 70×50×1.2mm 3 (4 layer glass epoxy) 2.05 2.0 1.0 0.82 0 --30 0 30 60 90 120 Ambient temperature, Ta -- °C No.A2184-4/16 LV52204MT LED Current Setting LED current is set by an external resistor connected between the FB pin and ground. ILED = VFB/RFB. The VFB can be controled by two dimming modes, PWM Mode or Digital Mode.In PWM mode, PWM input is converted into a near DC current by the internal resistor R that was equivalent to 60kΩ (±10%) and the external capacitor CFCAP as a low pass filter with a cut-off frequency fc = 1/2πRFCAP. The VFB can be adjusted by altering the duty cycle of the PWM signal (See Fig.1). VFB = 200 (mV) × PWM Duty (%) 200 200 180 180 160 160 140 140 120 120 VFB (mV) VFB (mV) On the other hand, VFB can be selected one from among 32steps in Digital Mode (See Fig.2). 100 80 100 80 60 60 40 40 20 20 0 0 10 20 30 40 50 60 70 80 90 100 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 PWM Duty (%) Data Fig1. VFB vs. PWM Duty (PWM mode) Fig2. VFB vs. Data Register Value (Digital mode) Dimming Mode Selection Dimming Mode is selected by a specific pattern of the SWIRE within Tsel (1ms) from the startup of the device every time. In order to startup the device, the SWIRE must keep high for longer than Ton. PWM Mode The dimming mode is set to PWM mode when it is not recognized as a digital mode within Tsel. To enter Digital Mode, the SWIRE is required keeping in low state for Tw1 (See Fig.4). If the PWM frequency is used faster than 6.6kHz, the dimming mode is set to PWM mode only. But slower than 6.6kHz, it is necessary to avoid entering the digital mode condition, such as SWIRE keeps high for longer than Tsel. PWM is enabled after Tdel from Tsel. Ton Tsel Tdel Toff Shutdown SWIRE (PWM Freq > 6.6kHz) PWM Enable Tsel Tdel Toff Shutdown SWIRE (PWM Freq < 6.6kHz) PWM Enable Fig3. SWIRE Timing Diagram in PWM mode No.A2184-5/16 LV52204MT Digital Mode To enter Digital Mode, SWIRE should be taken high for more than Tw0 (100μs) from the first rising edge and keep low state for Tw1(260μs) before Tsel(1ms). Tdel Tsel Tw1 SWIRE Toff Shutdown Shutdown Device Address & data Tw0 Device Address & data Digital Mode Fig4. SWIRE Timing Diagram in Digital mode It is required sending the device address byte and the data byte to select VFB. The bit detection is determined by the ratio of Th and Tl (See Fig6). The start condition for the bit transmission required SWIRE high for at least Tstart. The end condition is required SWIRE low for at least Tend.When data is not being transferred, SWIRE is set in the “H” state. These registers are initialized with POR (Power On Reset). In the LV52204MT, the device address (DA7 to DA0) is specified as “01110010”. D7 is setting for the acknowledge response. If the device address and the data byte are transferred on D7 = 1, the ACK signal is sent from the receive side to the send side. The acknowledge signal is issued when SWIRE on the send side is released and SWIRE on the receive side is set to low state. D6 and D5 need to send 0. D4 to D0 allow to changing the FB voltage. Register BIT Description DA7 7 0 DA6 6 1 DA5 5 1 Device DA4 4 1 Address DA3 3 0 DA2 2 0 DA1 1 1 DA0 0 0 Table1. Device Address Description Register Data BIT Description 0 = Acknowledge disabled D7 7 D6 6 D5 5 0 D4 4 Data bit 4 D3 3 Data bit 3 D2 2 Data bit 2 D1 1 Data bit 1 D0 0 Data bit 0 1 = Acknowledge enabled 0 Table2. Data Description S 0 1 1 1 0 0 1 0 E Device Address S 0 1 1 1 0 0 S 0 0 FB Voltage Control E 0 FB Voltage Control E ACK:Disable 1 0 E S Device Address S 0 Start Condition 1 0 A ACK:Enable E End Condition A Acknowledge Fig5. Example of writing data No.A2184-6/16 LV52204MT Tstart Tstart DA7 DA0 D7 D0 Tend TI0 > Th0 * 2 Tend Device Address Data (DA7 to DA0) (D7 to D0) Acknowledge : Disable (D7 = D0) Tstart TI0 Th0 Low state (Bit=0) Tstart Tack TI1 > Th1 * 2 A C K DA7 DA0 D7 TI1 Th1 High state (Bit=1) D0 Tend Tack Device Address Data (DA7 to DA0) (D7 to D0) Acknowledge : Enable (D7 = 1) Fig6.Bit detection Diagram D7 D6 D5 D4 D3 D2 D1 D0 FB voltage (mV) 0 1/0 0 0 0 0 0 0 0 0 1 1/0 0 0 0 0 0 0 1 5 2 1/0 0 0 0 0 0 1 0 8 3 1/0 0 0 0 0 0 1 1 11 4 1/0 0 0 0 0 1 0 0 14 5 1/0 0 0 0 0 1 0 1 17 6 1/0 0 0 0 0 1 1 0 20 7 1/0 0 0 0 0 1 1 1 23 8 1/0 0 0 0 1 0 0 0 26 9 1/0 0 0 0 1 0 0 1 29 10 1/0 0 0 0 1 0 1 0 32 11 1/0 0 0 0 1 0 1 1 35 12 1/0 0 0 0 1 1 0 0 38 13 1/0 0 0 0 1 1 0 1 44 14 1/0 0 0 0 1 1 1 0 50 15 1/0 0 0 0 1 1 1 1 56 16 1/0 0 0 1 0 0 0 0 62 17 1/0 0 0 1 0 0 0 1 68 18 1/0 0 0 1 0 0 1 0 74 19 1/0 0 0 1 0 0 1 1 80 20 1/0 0 0 1 0 1 0 0 86 21 1/0 0 0 1 0 1 0 1 92 22 1/0 0 0 1 0 1 1 0 98 23 1/0 0 0 1 0 1 1 1 104 24 1/0 0 0 1 1 0 0 0 116 25 1/0 0 0 1 1 0 0 1 128 26 1/0 0 0 1 1 0 1 0 140 27 1/0 0 0 1 1 0 1 1 152 28 1/0 0 0 1 1 1 0 0 164 29 1/0 0 0 1 1 1 0 1 176 30 1/0 0 0 1 1 1 1 0 188 31 1/0 0 0 1 1 1 1 1 *200 (*Default) Table3. Data Register vs. FB Voltage No.A2184-7/16 LV52204MT Start up and Shutdown The device becomes enabled when SWIRE is initially taken high.The dimming mode is determined within Tsel and the boost converter start up after Tdel. To place the device into shutdown mode, the SWIRE must be held low for Toff. PWM MODE VIN Tsel Tdel Toff SWIRE 200m * duty FB Shutdown delay FCAP DCDC_EN (internal signal) Digital MODE VIN Tdel Tsel Toff Tw1 SWIRE Device Address & data Tw0 Device Address & data Programed value Shutdown delay FB FCAP DCDC_EN (internal signal) Fig7.Start up and shutdown diagram No.A2184-8/16 LV52204MT Open LED Protection If SW terminal voltage exceeds a threshold Vovp (38V typ) for 8 cycles, boost converter enters shutdown mode. In order to restart the IC, SWIRE signal is required again. Over Current Protection Current limit value for built-in power MOS is around 0.7A. The power MOS is turned off for each switching cycle when peak current through it exceeds the limit value. Under Voltage Lock Out (UVLO) UVLO operation works when VIN terminal voltage is below 2.2V. Thermal Shutdown When chip temperature is too high, boost converter is stopped. Application Circuit Diagram 10LEDs D1 L1 22μH VBAT C1 1μF C2 1μF 5 4 FCAP SWIRE GND 2 3 SW 6 VIN FB 1 PWM/ 1-Wire C3 220nF R1 10Ω L1: VLS3012T-220M49 (TDK), VLF504015MT-220M (TDK) D1: MBR0540T1 (ON semi), NSR05F40 (ONsemi) C2: GRM21BR71H105K (Murata), C1608X5R1H105K (TDK) No.A2184-9/16 LV52204MT 6LEDs D1 L1 10μH VBAT C1 1μF C2 1μF 5 4 FCAP SWIRE GND 2 3 SW 6 VIN FB 1 PWM/ 1-WIRE C3 220nF R1 10Ω L1: VLS3012T-100M72 (TDK), VLF302512M-100M (TDK) D1: MBR0540T1 (ON semi), NSR05F40 (ONsemi) C2: GRM21BR71H105K (Murata), C1608X5R1H105K (TDK) No.A2184-10/16 LV52204MT Typical Characteristics (VIN = 3.6V, L = 22μH, T = 25°C, unless otherwise specified) Efficiency -- Output current 100 80 4.2V 6LED 8LED 70 60 50 40 10LED 90 10LED Efficency -- % Efficency -- % 90 Efficiency -- Output current 100 VIN=3.6V 80 3.6V 70 60 50 0 5 10 15 40 20 5 0 10 LED current -- mA FB voltage -- mV FB voltage -- mV Mode=PWM 150 100 100 50 50 0 2 4 6 8 0 10 12 14 16 18 20 22 24 26 28 30 32 0 10 20 30 40 Data register 50 60 70 80 90 100 PWM duty -- % FB voltage -- Temperature 200 180 160 160 140 140 FB voltage -- mV 180 120 DATA=16 100 FB voltage -- Temperature 200 DATA=31 80 60 Duty=100% 120 Duty=50% 100 80 60 40 40 DATA=06 20 0 --30 --15 0 Duty=10% 20 Mode=Digital Mode=PWM 15 30 45 60 75 0 --30 90 Temperature -- °C --15 0 15 30 45 60 75 90 Temperature -- °C VIN current -- VIN 1000 20 LED current -- PWM frequency 800 75% LED current -- mA 15 ICC -- µA 20 FB voltage -- PWM duty 200 Mode=Digital 150 FB voltage -- mV 15 LED current -- mA FB voltage -- DATA register 200 0 3.0V 600 400 50% 10 25% 5 200 0 2 3 4 VIN -- V 5 6 0 0.1 1 10 100 PWM frequency -- kHz No.A2184-11/16 LV52204MT PACKAGE DIMENSIONS WDFN6 2x2, 0.65P CASE 511BR-01 ISSUE O D A B EXPOSED Cu NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.15 AND 0.25 mm FROM THE TERMINAL TIP. 4. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. MOLD CMPD DETAIL B ALTERNATE CONSTRUCTIONS PIN ONE REFERENCE E 0.10 C 0.10 C DIM A A1 A3 b D D2 E E2 e L L1 L L L1 TOP VIEW DETAIL A 0.05 C ALTERNATE CONSTRUCTIONS A3 DETAIL B MILLIMETERS MIN MAX 0.70 0.80 0.00 0.05 0.20 REF 0.25 0.35 2.00 BSC 1.50 1.70 2.00 BSC 0.90 1.10 0.65 BSC 0.40 0.20 --0.15 A 6X 0.05 C A1 NOTE 4 C SIDE VIEW GENERIC MARKING DIAGRAM* SEATING PLANE 1 XX M D2 DETAIL A XX = Specific Device Code M = Date Code L 1 3 *This information is generic. Please refer to device data sheet for actual part marking. Pb−Free indicator, G or microdot , may or may not be present. E2 4 6 6X RECOMMENDED MOUNTING FOOTPRINT b e BOTTOM VIEW 0.10 M C A B 0.05 M C 1.72 NOTE 3 6X 0.45 1.12 PACKAGE OUTLINE 6X 0.40 2.30 1 0.65 PITCH DIMENSIONS: MILLIMETERS LV52204MT is as follows. MARKING DIAGRAM W4M W4 = Device Code M = Date Code = Pb-Free Package PS No.A2184-12/16 LV52204MT PS No.A2184-13/16 LV52204MT PS No.A2184-14/16 LV52204MT PS No.A2184-15/16 LV52204MT ORDERING INFORMATION Device LV52204MTTBG Package WDFN6 (2x2) (Pb-Free) Shipping (Qty / Packing) 3000 / Tape & Reel ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. 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This literature is subject to all applicable copyright laws and is not for resale in any manner. PS No.A2184-16/16