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AP3154 Dataheets PDF



Part Number AP3154
Manufacturers Diodes
Logo Diodes
Description 120mA HIGH EFFICIENCY
Datasheet AP3154 DatasheetAP3154 Datasheet (PDF)

AP3154 120mA HIGH EFFICIENCY WHITE LED DRIVER www.DataSheet4U.com Features • • • • • • • • • • • • • • • • • Up to 88% Max power efficiency Wide input voltage range: 2.7V ~ 5.5V 1x, 1.5x, and 2x charge-pump modes Drive up to 4 white LEDs Default maximum current setting: 30mA each channel 120mA maximum output current through 4 channels Programmable switching frequency, default 1.2MHz Spread Spectrum Control with 10% frequency deviation 1-wire Serial Digital Interface (SDI) or PWM for dimming co.

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AP3154 120mA HIGH EFFICIENCY WHITE LED DRIVER www.DataSheet4U.com Features • • • • • • • • • • • • • • • • • Up to 88% Max power efficiency Wide input voltage range: 2.7V ~ 5.5V 1x, 1.5x, and 2x charge-pump modes Drive up to 4 white LEDs Default maximum current setting: 30mA each channel 120mA maximum output current through 4 channels Programmable switching frequency, default 1.2MHz Spread Spectrum Control with 10% frequency deviation 1-wire Serial Digital Interface (SDI) or PWM for dimming control Soft-start during power-up and mode switching Soft-stop during shutdown Short-circuit protection Over-voltage protection and under-voltage lockout Low shutdown current < 6µA Industry-leading low profile package DFN3030-12: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish / RoHS Compliant (Note 1) General Description The AP3154 is a high efficiency charge-pump white LED driver with 1x, 1.5x, 2x operating modes. The AP3154 operates on power supplies from 2.7v to 5.5v. It drives up to four channels of white LEDs while the intensity of each channel is configured by varying the respective current levels. Each channel can supply up to 30mA current. Up to four channels can be ganged together to provide maximum load current of 120mA. The Serial Digital Interface (SDI) provides the capability to configure the current for each LED channel. Some other key features, such as Up Spread Spectrum Control, different charge-pump switching frequencies (0.6MHz/1.2MHz/1.8MHz), and PWM dimming control, can also be programmed through the interface. The AP3154 has a built-in soft-start circuit to minimize the inrush current during power-up and mode switching. Various protections such as short-circuit, over-voltage, under-voltage, and thermal shutdown are integrated to ensure system reliability. The quiescent current of AP3154 during shutdown is less than 6µA. Applications • • • • • • Mobile Phone PDA (Personal Digital Assistant) White LED Backlighting Camera Flash LED Lighting LCD Modules Portable Devices Ordering Information AP 3154 F G - 7 Package F : DFN3030-12 Device AP3154FG-7 Notes: Green G : Green Packing 7 : Tape & Reel Package Code F Packaging (Note 2) DFN3030-12 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf AP3154 Rev. 2 1 of 13 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP3154 120mA HIGH EFFICIENCY WHITE LED DRIVER www.DataSheet4U.com Pin Assignment ( Top View ) D4 SDI C1P C1N VOUT C2P 1 2 3 4 5 6 12 11 D3 D2 D1 GND VIN C2N Exposed Pad 10 9 8 7 DFN3030-12 Pin Descriptions Pin Name D4 SDI C1P C1N VOUT C2P C2N VIN GND D1 D2 D3 GND Pin # 1 2 3 4 5 6 7 8 9 10 11 12 EP PAD Description Current Sink Input #4. Connect to VOUT when un-used. 1-wire Serial Digital Interface Input / PWM input Positive Terminal of Flying Capacitor. Connect a 1µF capacitor between C1P and C1N. Negative Terminal of Flying Capacitor. The charge pump output voltage to drive load circuit. Connect a 1µF capacitor between this pin and ground. Positive Terminal of Flying Capacitor. Connect a 1µF capacitor between C2P and C2N. Negative Terminal of Flying Capacitor. Input Power Source. Connect a 1µF capacitor between this pin and ground. Ground. Current Sink Input #1. Connect to VOUT when un-used. Current Sink Input #2. Connect to VOUT when un-used. Current Sink Input #3. Connect to VOUT when un-used. Exposed Pad (bottom). Connect to ground underneath the package. AP3154 Rev. 2 2 of 13 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP3154 120mA HIGH EFFICIENCY WHITE LED DRIVER www.DataSheet4U.com Block Diagram C2P C2N C1P C1N VOUT VIN CHARGE PUMP SWITCHES SHORT CIRCUIT PROTECTION OVER VOLTAGE PROTECTION SDI SERIAL DIGITAL INTERFACE DIGITAL CONTROL BLOCK OUTPUT VOLTAGE REGULATION & LED SHORT CIRCUIT DETECTION BANDGAP OSCILLATOR D1 D2 D3 OVER TEMPERATURE PROTECTION UNDER VOLTAGE LOCKOUT CURRENT CONTROL D4 GND Typical Application Circuit VIN 1uF CIN 8 VIN C2P 6 1uF C2 1uF C1 7 C2N 3 C1P C1N AP3154 4 VOUT 5 D4 LED D3 LED D2 LED D1 LED 1uF COUT SDI 2 SDI GND 9 D4 D3 D2 D1 1 12 11 10 AP3154 Rev. 2 3 of 13 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP3154 120mA HIGH EFFICIENCY WHITE LED DRIVER www.DataSheet4U.com Absolute Maximum Ratings Symbol ESD HBM ESD MM (Notes 3) Description Human Body Model ESD Protection Machine Model ESD Protection Input Voltage SDI to GND Voltage Maximum DC Output Current Maximum Power Dissipation Operating Junction Temperature Range Value 2 200 -0.3 to 6 -0.3 to VIN + 0.3 150 0.85 -40 to 150 Units KV V V V mA W °C VIN VSDI IOUT PD TJ Notes: 3. Exceeding Absolute Maximum Ratings will cause permanent damage to the .


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