MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI
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________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI 19-4921; Rev 0; 3/10 Typical Operating Circuit appears at end of data sheet. General Description The MAX8930 integrates a charge pump for white LED display backlighting with ambient light control (ALC) feature. The high-efficiency, adaptive-mode 1x/-0.5x charge pump drives up to 11 LEDs (8 WLEDs + RGB LED) with constant current for uniform brightness. The LED current is adjustable from 0.1mA to 25.6mA in 256 linear steps through I2C. High accuracy and LED-to-LED current matching are maintained throughout the adjustment range. The MAX8930 includes soft-start, thermal shutdown, open-circuit, and short-circuit protection. Three 200mA LDOs are provided with programmable output voltages to provide power to external circuitry. These three LDOs can also be configured for a GPO function through the I2C. A step-up converter is also available on the MAX8930 for biasing a PMOLED subpanel. The MAX8930 is available in the 49-bump, 3.17mm x 3.17mm WLP package. Features S White LED Charge Pump S Adaptive 1x or -0.5x Negative Modes S 11 Low-Dropout LED Current Sinks with 25.6mA to 0.1mA in 256 Dimming Steps S Ramp-Up/Down Control for Main White LED S Ramp-Up/Down Control for RGB LED S Individual Brightness Control for Each White, RGB LED S Low 240ìA (typ) Quiescent Current S Ambient Light Control (ALC) for Any Type of Light Sensor S Content Adaptive Interface S I2C-Compatible Control Interface S Three Programmable LDOs Up to 200mA S Step-Up DC-DC Converter with Programmable Output for PMOLED Application S Low 0.1ìA Shutdown Current S 2.7V to 5.5V Supply Voltage Range S Thermal Shutdown S Open and Short-Circuit Protection Applications Cell Phones and Smartphones PDAs, Digital Cameras, Camcorders, and Other Portable Equipment Ordering Information +Denotes a lead(Pb)-free/RoHS-compliant package. Simplified Application Circuit PART TEMP RANGE PIN-PACKAGE MAX8930EWJ+ -40NC to +85NC 49 WLP 0.4mm pitch ìP INPUT 1.7V TO 5.5V INPUT 2.7V TO 5.5V PV4 PV5 PV1 PV2 PV3 WLED1 INPUT WLED2 WLED3 WLED4 WLED5 WLED6 WLED7 WLED8 SCL SDA EN CAI PLAYR PLAYG PLAYB REFBP VDD FILT SENSE LIGHT SENSOR BIAS RLED GLED BLED CHG LDO1 2.3V TO 3.1V, 200mA 2.3V TO 3.1V, 200mA 1.2V, 1.5V, 1.8V, 2.5V, 200mA 13V TO 16.5V LDO2 LDO3 OUT KEY INPUT MAX8930

_______________________________________________________________________________________ 3 MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI I2C Interface Characteristics Charge Pump Characteristics PARAMETER CONDITIONS MIN TYP MAX UNITS SDA, SCL Input High Voltage VDD = 1.7V to 5.5V 0.7 x VDD V SDA, SCL Input Low Voltage VDD = 1.7V to 5.5V 0.3 x VDD V SDA, SCL Input Current VIL = 0V or VIH = 5.5V, VDD = 5.5V TA = +25NC 0.01 1 FA TA = +85NC 0.1 SDA Output Low Voltage ISDA = 3mA, for acknowledge (Note 3) 0.03 0.4 V Clock Frequency (Note 3) 100 400 kHz Bus-Free Time Between...

4 _______________________________________________________________________________________ MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI Curent Sink Driver Characteristics LDO1 Characteristics PARAMETER CONDITIONS MIN TYP MAX UNITS Current Setting Range WLED1–WLED8, RGB programmable by I2C 0.1 25.6 mA WLED_, RGB Ramp-Up/Ramp- Down Time Main WLED_ and RGB ramp-up/ramp-down in 0.1mA increments; 8 steps are programmable through I2C; ramp-up and ramp-down times are set separately 0 (default) ms/ 0.1mA 0.016 0.064 0.128 0.256 0.512 1.024 2.048 WLED_, RGB Current Accuracy 25.6mA...

_______________________________________________________________________________________ 5 MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI LDO1 CHARACTERISTICS (continued) LDO2 Characteristics PARAMETER CONDITIONS MIN TYP MAX UNITS Power-Supply Rejection DVLDO1/DVPV3 f = 10Hz to 10kHz, ILDO1 = 10mA, CLDO1 = 1FF 60 dB Output Noise Voltage (RMS) f = 100Hz to 100kHz, ILDO1 = 10mA, CLDO1 = 1FF 45 FVRMS Minimum Output Capacitor ILDO1 < 200mA 1 FF Startup Time from Shutdown ILDO1 = 150mA (Note 3) 40 100 Fs Startup Transient Overshoot ILDO1 = 150mA (Note 3) 3 50 mV Shutdown Output...

6 _______________________________________________________________________________________ MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI LDO3 Characteristics Step-Up Converter Characteristics PARAMETER CONDITIONS MIN TYP MAX UNITS Input Operating Range VPV4 1.7 5.5 V Output Voltage VLDO3 200mA at VPV4 = 2.4V 1.764 1.80 1.854 V Programmable Output Voltage VPV4 = 1.8V, ILDO3 = 50mA 1.164 1.2 1.236 V 1.455 1.5 1.545 VPV4 = 3.7V, ILDO3 = 50mA 1.764 1.80 1.854 2.425 2.5 2.575 Output Current 200 mA Current Limit VLDO3 = 90% of nominal regulation voltage (Note 4) 250 475 750 mA...

_______________________________________________________________________________________ 7 MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI Step-Up Converter Characteristics (continued) Ambient Light Sensor Interface Key Characteristics PARAMETER CONDITIONS MIN TYP MAX UNITS Current Limit Propagation Delay (LX) 55 ns Output Voltage Accuracy VPV5 = 3.7V, IOUT = 0mA TA = 0NC to +85NC -2 +2 % TA = -40NC -2.5 +2.5 Programmable Output Voltage VPV5 = 3.7V, IOUT = 0mA 13.0 V 13.5 14.0 14.5 15.0 15.5 16.0 16.5 PARAMETER CONDITIONS MIN TYP MAX UNITS BIAS Output Voltage IBAIS = 200FA,...

8 _______________________________________________________________________________________ MAX8930 WLED Charge Pump, RGB, OLED Boost, LDOs with ALC and CAI CAI Characteristics GPO (Open-Drain Output) Characteristics EN Characteristics PLAYR/PLAYG/PLAYB Characteristics PARAMETER CONDITIONS MIN TYP MAX UNITS PWM Low-Level Input Voltage 0.4 V PWM High-Level Input Voltage 1.4 V PWM Dimming Frequency CFILT = 0.1FF (Note 3) 0.1 0.2 15 kHz Current Dimming Range Duty cycle = 0% to 100% (Note 3) 0 25.6 mA PWM Dimming Resolution 1% P duty cycle P 100% (Note 3) 0.256 mA/% CAI Enable Blanking Time (tB)...