AP3154AFG-7
AP3154AFG-7 Datasheet
AP3154A
| Part | Datasheet |
|---|---|
AP3154AFG-7 |
AP3154AFG-7 (pdf) |
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| AP3154A 120mA HIGH EFFICIENCY WHITE LED DRIVER • 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 20mA 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 • Lead Free package DFN3030-12 • DFN3030-12 Available in “Green” Molding Compound No Br, Sb • Lead Free Finish / RoHS Compliant Note 1 The AP3154A is a high efficiency charge-pump white LED driver with 1x, 1.5x, 2x operating modes. The AP3154A 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. By default, all 4 channels are set to the minimum current level after the chip is enabled or back from shutdown mode. 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 AP3154A 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 AP3154A during shutdown is less than 6µA. • Mobile Phone • PDA Personal Digital Assistant • White LED Backlighting • Camera Flash LED Lighting • LCD Modules • Portable Devices Typical Application Circuit VIN 1uF CIN 8 VIN C2P 6 C2N 7 C1P 3 C1N 4 AP3154A VOUT 5 D3 12 D2 11 GND D1 10 1uF COUT 1 of 14 AUGUST 2009 Diodes Incorporated Ordering Information AP3154A 120mA HIGH EFFICIENCY WHITE LED DRIVER AP 3154 A F G - 7 Package F DFN3030-12 Green G Green Packing 7 Tape & Reel Device AP3154AFG-7 Package Code F Packaging Note 2 DFN3030-12 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel EU Directive 2002/95/EC RoHS . All applicable RoHS exemptions applied. Please visit our website at Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at Pin Assignment Top View D4 1 SDI 2 C1P 3 C1N 4 VOUT 5 C2P 6 Exposed Pad 12 D3 11 D2 10 D1 9 GND 7 C2N DFN3030-12 2 of 14 AUGUST 2009 Diodes Incorporated Pin Descriptions AP3154A 120mA HIGH EFFICIENCY WHITE LED DRIVER Pin Name D4 SDI C1P C1N Pin # 1 2 3 4 VOUT C2P C2N VIN GND D1 D2 D3 GND 6 7 8 9 10 11 12 EP PAD Current Sink Input 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 Connect to VOUT when un-used. Current Sink Input Connect to VOUT when un-used. Current Sink Input Connect to VOUT when un-used. Exposed Pad bottom . Connect to ground underneath the package. Block Diagram C2P C2N C1P C1N CHARGE PUMP SWITCHES |
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