MIC2860-2PYC6-TR

MIC2860-2P High Efficiency 2-Channel WLED Driver with PWM Control Features General Description • • • • • • • The MIC2860-2P is a high efficiency white LED (WLED) driver designed to drive two WLEDs and greatly extend battery life for portable display backlighting and keypad backlighting in low-cost mobile devices. The MIC2860-2P architecture provides the highest possible efficiency by eliminating switching losses present in traditional charge pumps or inductive boost circuits. It features a typical dropout of 52 mV at 30.2 mA per channel. This allows the WLEDs to be driven directly from the battery, eliminating switching noise and losses present with the use of boost circuitry. High Efficiency (No Switching Losses) PWM Frequency as Low as 250 Hz Input Voltage Range: 3.0V to 5.5V Linear Driver Dropout of 52 mV at 30.2 mA Matching Better than ±0.5% (Typical) Current Accuracy Better than 1.0% (Typical) Available in Thin SOT-23 and SC-70 Packages Applications • • • • • Mobile Handsets Digital Cameras Portable Media/MP3 Players Portable Navigation Devices (GPS) Portable Applications The two channels have typical matching of ≤ ±0.5%, which ensures uniform display illumination under all conditions. The WLED’s brightness is externally preset by a resistor and dimmed using PWM interface operating down to less than 1% duty cycle. The MIC2860-2P is available in Thin SOT-23 and SC-70 6-lead packages with a junction temperature range of –40°C to +125°C. Package Types MIC2860-2P 6-Lead SC-70 (C6) (Top View)  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P 6-Lead Thin SOT-23 (D6) (Top View) DS20006695A-page 1 MIC2860-2P Typical Application Circuit LCD Display Backlight with Two WLEDs MIC2860-2P VIN VIN 1μF RSET NŸ EN PWM CONTROL LOW DROPOUT LINEAR DRIVER D1 VIN D2 GND Functional Block Diagram D1 VIN D2 EN PWM CONTROL RSET GND DS20006695A-page 2  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Main Input Voltage (VIN)............................................................................................................................... –0.3V to +6V Enable Input Voltage (VEN) ............................................................................................................................–0.3V to VIN LED Driver Voltage (VD1, D2)..........................................................................................................................–0.3V to VIN Power Dissipation .................................................................................................................................. Internally Limited ESD Rating ................................................................................................................................................................ 2 kV Operating Ratings ‡ Supply Voltage (VIN) ....................................................................................................................................+3.0 to +5.5V Enable Input Voltage (VEN) .................................................................................................................................0V to VIN LED Driver Voltage (VD1, D2)...............................................................................................................................0V to VIN † Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. ‡ Notice: The device is not guaranteed to function outside its operating ratings. ELECTRICAL CHARACTERISTICS Electrical Characteristics: VIN = VEN = 3.6V, CIN = 1 µF, RSET = 9.53 kΩ; VD1, D2 = 0.6V; TJ = +25°C, bold values valid for –40°C ≤ TJ ≤ +85°C; unless noted. Parameter Symbol Min. Typ. Max. Units 27.18 30.2 33.22 mA Note 1 — ±0.5 ±3 % Note 2 VDROP — 52 125 mV Where ILED = 90% of LED current seen at VDROPNOM = 0.6V, 100% brightness level Ground/Supply Bias Current IGND — 0.7 1.5 mA IOUT = 30.2 mA Shutdown Current ISHDN — 0.01 1 µA Current source leakage, VEN = 0V — — 0.4 1.4 — — — 0.01 1 — 32 80 — 1.5 4 Current Accuracy Matching Dropout (VD1, D2) PWM Dimming Enable Input Voltage VEN Enable Input Current IEN Current Source Delay (50% Levels) Current Source Transient Time ON-to-Shutdown Time Note 1: 2: — 0.3 — tRISE — 0.7 — tFALL — 0.2 — tON_SD 4 5.8 10 V Conditions Logic low Logic high µA VEN ≥ 1.4V µs Standby to ON Shutdown to ON ON to Standby µs 10% to 90% ms VEN = 0V As determined by the average current of all channels in use and all channels loaded. The current through each LED meets the stated limits from the average current of all LEDs.  2022 Microchip Technology Inc. and its subsidiaries DS20006695A-page 3 MIC2860-2P TEMPERATURE SPECIFICATIONS Parameters Sym. Min. Typ. Max. Units Conditions TLEAD — — +260 °C Soldering, 10 sec. Junction Temperature Range TJ –40 — +125 °C — Storage Temperature TS –65 — +150 °C — Thermal Resistance, SC-70 6-Ld JA — 256 — °C/W — Thermal Resistance, TSOT 6-Ld JA — 177 — °C/W — Temperature Ranges Lead Temperature Package Thermal Resistances DS20006695A-page 4  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P TYPICAL PERFORMANCE CURVES Note: LED CURRENT (mA) The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. 35 35 30 30 LED2 LED DROPOUT (mV) 2.0 25 20 15 10 25 LED1 20 15 10 5 5 0 RSET = 19.1kŸ 0 5 10 15 20 25 30 35 -40 -20 0 RSET (NŸ ) Peak LED Current vs. RSET. FIGURE 2-4: Temperature. 70 32 60 31.5 LED CURRENT (mA) CURRENT SINK DROPOUT (mV) FIGURE 2-1: 50 40 LED1 30 40 60 80 100 120 LED2 20 Dropout Voltage vs. 31 LED1 30.5 30 LED2 29.5 29 28.5 10 RSET = 9.53kŸ 28 0 0 10 20 30 -40 40 -20 0 FIGURE 2-2: Dropout Voltage vs. RSET. 20 40 60 80 100 120 TEMPERATURE (°C) RSET (k Ÿ) FIGURE 2-5: Temperature. 70 LED Current vs. 16 60 15.5 LED1 LED CURRENT (mA) LED DROPOUT (mV) 20 TEMPERATURE (°C) 50 40 ILED1 15 ILED2 14.5 LED2 30 20 14 13.5 10 RSET = 19.1kŸ RSET = 9.53kŸ 13 0 -40 -20 0 20 40 60 80 100 120 -40 Dropout Voltage vs.  2022 Microchip Technology Inc. and its subsidiaries 0 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 2-3: Temperature. -20 FIGURE 2-6: Temperature. LED Current vs. DS20006695A-page 5 MIC2860-2P 0.4 0.35 MATCHING (%) 0.3 0.25 RSET = 9.53kŸ 0.2 0.15 0.1 RSET = 19.1kŸ 0.05 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) FIGURE 2-7: Matching vs. Temperature. FIGURE 2-10: Cycle. PWM Signal at 50% Duty FIGURE 2-8: Cycle. PWM Signal at 1% Duty FIGURE 2-11: Cycle. PWM Signal at 80% Duty FIGURE 2-9: Cycle. PWM Signal at 10% Duty FIGURE 2-12: Cycle. PWM Signal at 100% Duty DS20006695A-page 6  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P FIGURE 2-13: Cycle. LED Startup into 10% Duty FIGURE 2-16: ON to Standby. FIGURE 2-14: Shutdown to ON. FIGURE 2-17: ON to Shutdown. FIGURE 2-15: Standby to ON.  2022 Microchip Technology Inc. and its subsidiaries DS20006695A-page 7 MIC2860-2P 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin Number Pin Name 1 EN 2 GND Ground. 3 VIN Voltage Input. Connect at least 1 µF ceramic capacitor between VIN and GND. 4 D2 LED2 driver. Connect LED anode to VIN and cathode to this pin. Do not leave floating. 5 RSET 6 D1 DS20006695A-page 8 Description PWM Control Pin. This pin is used as a PWM input for dimming of WLEDs. Do not leave floating. An internal 1.27V reference sets the nominal maximum WLED current. Example, apply a 9.53 kΩ resistor between RSET and GND to set LED current to 30.2 mA at 100% duty cycle. LED1 driver. Connect LED anode to VIN and cathode to this pin. Do not leave floating.  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P 4.0 FUNCTIONAL DESCRIPTION A plot of ILED versus RSET is shown in Figure 4-1. The MIC2860-2P is a two channel WLED driver. The WLED driver is designed to maintain proper current regulation with LED current accuracy of 1% with a typical matching between the 2 channels of ±0.5%. The WLEDs are driven independently from the input supply and will maintain regulation with a dropout of 52 mV at 30.2 mA. The low dropout of the linear drivers allows the WLEDs to be driven directly from the battery voltage and eliminates the need for large and inefficient charge pumps. The peak WLED current for each channel is set via an external resistor. If dimming is desired the MIC2860-2P can dim via a PWM signal. 4.1 Block Diagram VIN The input supply (VIN) provides power to the linear drivers and the control circuitry. The VIN operating range is 3V to 5.5V. Due to wire inductance, a minimum bypass capacitor of 1 µF should be placed close to input (VIN) pin and the ground (GND) pin. 4.3 EN The EN pin enables the linear drivers. It can also be used for dimming with a PWM signal. See the PWM Dimming Interface section for details. Do not leave floating. 4.4 LED CURRENT (mA) 30 25 20 15 10 5 0 8 12 16 20 24 28 32 RSET (kŸ) As shown in the Functional Block Diagram, the MIC2860-2P consists of two current sinks with the peak current determined by RSET. The linear drivers have a designated control block for enabling and dimming of the WLEDs. The MIC2860-2P is controlled by the PWM control block that receives PWM signals for dimming. 4.2 35 FIGURE 4-1: 4.5 Peak LED Current vs. RSET. D1, D2 The D1 and D2 pins are the linear driver inputs for WLED 1 and 2, respectively. Connect the anodes of the WLEDs to VIN and each cathode of the WLEDs to D1 and D2. When operating with a single WLED, D1 and D2 should be connected to the WLED cathode to parallel the outputs for improved dropout performance. Paralleling these pins can also be done to drive a higher current through a single WLED. Do not leave these pins floating. 4.6 GND The ground pin is the ground path for the linear drivers. The current loop for the ground should be as small as possible. The ground of the input capacitor should be routed with low impedance traces to the GND pin and made as short as possible. RSET The RSET pin is used by connecting a RSET resistor to ground to set the peak current of the linear drivers. The maximum LED current (EN = 100% Duty Cycle) set by the RSET resistor is shown in the table below: TABLE 4-1: MAX. LED CURRENT VS. RSET RESISTOR VALUES RSET ILED 9.53 kΩ 30.2 mA 11.5 kΩ 25.0 mA 14.3 kΩ 20.1 mA 15.8 kΩ 18.2 mA 19.1 kΩ 15.1 mA 28.7 kΩ 10.0 mA  2022 Microchip Technology Inc. and its subsidiaries DS20006695A-page 9 MIC2860-2P 5.0 APPLICATION INFORMATION 5.1 PWM Dimming Interface The MIC2860-2P can receive PWM signals from the EN pin for WLED dimming. Dimming is generated by pulsing the WLEDs on and off in synchronization with the PWM signal. The MIC2860-2P incorporates an internal shutdown delay to ensure that the internal control circuitry remains active during PWM dimming for optimum performance. The lower PWM frequency range is recommended at 250 Hz due to the minimum standby to shutdown time of 4 ms. Because the period of 250 Hz is 4 ms, a 1% duty cycle would have an on time of 40 µs and an off time of 3.96 ms. To support operation down to 1% duty cycle, the maximum off time must not exceed 4 ms or the drivers may go into the low IQ shutdown state. With PWM frequencies higher than 500 Hz the tRISE (0.7 μs) and tFALL (0.2 μs) times will have a greater effect on the accuracy of the outputs. An upper frequency of 500 Hz is recommended to maintain output accuracy with duty cycles down to 1%. For systems that do not require a duty cycle below 1%, the frequency of the PWM signal may be increased. For example, with a minimum duty cycle of 10% (3.02 mA with RSET = 9.53 kΩ) the PWM frequency can be increased to 10 kHz and still maintain accuracy. 5.2 Input Capacitor The MIC2860-2P is a high performance, high bandwidth device. Stability can be maintained using a ceramic input capacitor of 1 µF. Low-ESR ceramic capacitors provide optimal performance with a minimum amount of space. Additional high frequency capacitors, such as small valued NPO dielectric type capacitors, help filter out high-frequency noise and are good practice in any noise-sensitive circuit. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. DS20006695A-page 10  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P 6.0 TYPICAL APPLICATION SCHEMATIC U1 MIC2860-2P 1 J3 EN 2 D1 LED D1 EN GND RSET 6 R1 NŸ 5 D2 LED J1 VIN TABLE 6-1: Item 3 D2 4 C1 1μF/6.3V BILL OF MATERIALS Part Number C1 C1608X5R0J105K R1 CRCW06032052FT1 U1 VIN MIC2860-2PYC6 MIC2860-2PYD6 Manufacturer TDK Vishay Microchip  2022 Microchip Technology Inc. and its subsidiaries Description Qty. 1 µF Ceramic Capacitor, 6.3V, X5R, Size 0603 1 9.53 kΩ, 1%, Size 0603 1 2-Channel PWM Linear WLED Driver, SC-70 2-Channel PWM Linear WLED Driver, SOT-23 1 DS20006695A-page 11 MIC2860-2P 7.0 PACKAGING INFORMATION 7.1 Package Marking Information 6-Lead SC-70* (Front) Example XXX 62P 6-Lead SC-70* (Back) Example 6-Lead TSOT-23* (Back) Example NNN 54S NNN 7OK Legend: XX...X Y YY WW NNN e3 * 6-Lead TSOT-23* (Front) XXXX Example 602P Product code or customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code Pb-free JEDEC® designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. ●, ▲, ▼ Pin one index is identified by a dot, delta up, or delta down (triangle mark). Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. Package may or may not include the corporate logo. Underbar (_) symbol may not be to scale. Note: If the full seven-character YYWWNNN code cannot fit on the package, the following truncated codes are used based on the available marking space: 6 Characters = YWWNNN; 5 Characters = WWNNN; 4 Characters = WNNN; 3 Characters = NNN; 2 Characters = NN; 1 Character = N DS20006695A-page 12  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P 6-Lead SC-70 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.  2022 Microchip Technology Inc. and its subsidiaries DS20006695A-page 13 MIC2860-2P 6-Lead Thin SOT-23 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging. DS20006695A-page 14  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P APPENDIX A: REVISION HISTORY Revision A (June 2022) • Converted Micrel document MIC2860-2P to Microchip data sheet DS20006695A. • Minor text changes throughout.  2022 Microchip Technology Inc. and its subsidiaries DS20006695A-page 15 MIC2860-2P NOTES: DS20006695A-page 16  2022 Microchip Technology Inc. and its subsidiaries MIC2860-2P PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. Part Number X XX -XX Device Temp. Range Package Media Type Device: MIC2860-2P: High Efficiency 2-Channel WLED Driver with PWM Control Temperature Range: Y = –40°C to +125°C Package: C6 D6 = = 6-Lead SC-70 6-Lead Thin SOT-23 Media Type: TR = 3,000/Reel  2022 Microchip Technology Inc. and its subsidiaries Examples: a) MIC2860-2PYC6-TR: MIC2860-2P, –40°C to +125°C Temp. Range, 6-Lead SC-70, 3,000/Reel b) MIC2860-2PYD6-TR: MIC2860-2P, –40°C to +125°C Temp. Range, 6-Lead TSOT-23, 3,000/Reel Note 1: Tape and Reel identifier only appears in the catalog part number description. This identifier is used for ordering purposes and is not printed on the device package. Check with your Microchip Sales Office for package availability with the Tape and Reel option. DS20006695A-page 17 MIC2860-2P NOTES: DS20006695A-page 18  2022 Microchip Technology Inc. and its subsidiaries Note the following details of the code protection feature on Microchip products: • Microchip products meet the specifications contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and under normal conditions. • Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of Microchip product is strictly prohibited and may violate the Digital Millennium Copyright Act. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. Code protection does not mean that we are guaranteeing the product is "unbreakable" Code protection is constantly evolving. Microchip is committed to continuously improving the code protection features of our products. This publication and the information herein may be used only with Microchip products, including to design, test, and integrate Microchip products with your application. Use of this information in any other manner violates these terms. Information regarding device applications is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. 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ISBN: 978-1-6683-0622-2 For information regarding Microchip’s Quality Management Systems, please visit www.microchip.com/quality.  2022 Microchip Technology Inc. and its subsidiaries DS20006695A-page 19 Worldwide Sales and Service AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://www.microchip.com/ support Web Address: www.microchip.com Australia - Sydney Tel: 61-2-9868-6733 India - Bangalore Tel: 91-80-3090-4444 China - Beijing Tel: 86-10-8569-7000 India - New Delhi Tel: 91-11-4160-8631 Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 China - Chengdu Tel: 86-28-8665-5511 India - Pune Tel: 91-20-4121-0141 China - Chongqing Tel: 86-23-8980-9588 Japan - Osaka Tel: 81-6-6152-7160 China - Dongguan Tel: 86-769-8702-9880 Japan - Tokyo Tel: 81-3-6880- 3770 China - Guangzhou Tel: 86-20-8755-8029 Korea - Daegu Tel: 82-53-744-4301 China - Hangzhou Tel: 86-571-8792-8115 Korea - Seoul Tel: 82-2-554-7200 China - Hong Kong SAR Tel: 852-2943-5100 Malaysia - Kuala Lumpur Tel: 60-3-7651-7906 China - Nanjing Tel: 86-25-8473-2460 Malaysia - Penang Tel: 60-4-227-8870 China - Qingdao Tel: 86-532-8502-7355 Philippines - Manila Tel: 63-2-634-9065 China - Shanghai Tel: 86-21-3326-8000 Singapore Tel: 65-6334-8870 China - Shenyang Tel: 86-24-2334-2829 Taiwan - Hsin Chu Tel: 886-3-577-8366 China - Shenzhen Tel: 86-755-8864-2200 Taiwan - Kaohsiung Tel: 886-7-213-7830 China - Suzhou Tel: 86-186-6233-1526 Taiwan - Taipei Tel: 886-2-2508-8600 China - Wuhan Tel: 86-27-5980-5300 Thailand - Bangkok Tel: 66-2-694-1351 China - Xian Tel: 86-29-8833-7252 Vietnam - Ho Chi Minh Tel: 84-28-5448-2100 Atlanta Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455 Austin, TX Tel: 512-257-3370 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 Dallas Addison, TX Tel: 972-818-7423 Fax: 972-818-2924 Detroit Novi, MI Tel: 248-848-4000 Houston, TX Tel: 281-894-5983 Indianapolis Noblesville, IN Tel: 317-773-8323 Fax: 317-773-5453 Tel: 317-536-2380 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Tel: 951-273-7800 Raleigh, NC Tel: 919-844-7510 New York, NY Tel: 631-435-6000 San Jose, CA Tel: 408-735-9110 Tel: 408-436-4270 Canada - Toronto Tel: 905-695-1980 Fax: 905-695-2078 DS20006695A-page 20 China - Xiamen Tel: 86-592-2388138 China - Zhuhai Tel: 86-756-3210040 Denmark - Copenhagen Tel: 45-4485-5910 Fax: 45-4485-2829 Finland - Espoo Tel: 358-9-4520-820 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Germany - Garching Tel: 49-8931-9700 Germany - Haan Tel: 49-2129-3766400 Germany - Heilbronn Tel: 49-7131-72400 Germany - Karlsruhe Tel: 49-721-625370 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Germany - Rosenheim Tel: 49-8031-354-560 Israel - Ra’anana Tel: 972-9-744-7705 Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781 Italy - Padova Tel: 39-049-7625286 Netherlands - Drunen Tel: 31-416-690399 Fax: 31-416-690340 Norway - Trondheim Tel: 47-7288-4388 Poland - Warsaw Tel: 48-22-3325737 Romania - Bucharest Tel: 40-21-407-87-50 Spain - Madrid Tel: 34-91-708-08-90 Fax: 34-91-708-08-91 Sweden - Gothenberg Tel: 46-31-704-60-40 Sweden - Stockholm Tel: 46-8-5090-4654 UK - Wokingham Tel: 44-118-921-5800 Fax: 44-118-921-5820  2022 Microchip Technology Inc. and its subsidiaries 09/14/21